An Integrated Well Performance Study For Shale Reservoir Systems Application To The Marcellus Shale

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An Integrated Well Performance Study for Shale Reservoir Systems - Application to the Marcellus Shale

Author : Landon Jess Riser
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (881 download)

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Book Synopsis An Integrated Well Performance Study for Shale Reservoir Systems - Application to the Marcellus Shale by : Landon Jess Riser

Download or read book An Integrated Well Performance Study for Shale Reservoir Systems - Application to the Marcellus Shale written by Landon Jess Riser and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work we focus on the integration of two independent analyses, time-rate analysis and model-based production analysis, as an approach to resolve the uncertainty in estimating ultimate recovery (EUR) for wells in unconventional reservoirs. In particular, we seek to establish a relationship between time-rate parameters from modern time-rate models and the reservoir and completion properties obtained from model-based production analysis. Establishing agreement between these independent analyses will support the practice of EURs in unconventional reservoir systems. In this work we provide a study of 55 (fifty-five) shale gas wells taken from the Marcellus shale (USA), complete with an integrated workflow of model-based production analysis and time-rate analysis accompanied by a discussion of challenges and methodologies. In addition, we present a study on pressure transient analysis (PTA) for selected pressure buildup tests conducted on a series of Marcellus shale wells. We include field cases complete with orientation, diagnostic, and analysis plots; as well as commentary on the observed behavior of the pressure transient tests themselves and what these pressure buildup tests may yield with regard to insight into the well/reservoir that production data in isolation cannot provide. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151864

Shale Gas and Tight Oil Reservoir Simulation

Author : Wei Yu
Publisher : Gulf Professional Publishing
ISBN 13 : 0128138696
Total Pages : 432 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Shale Gas and Tight Oil Reservoir Simulation by : Wei Yu

Download or read book Shale Gas and Tight Oil Reservoir Simulation written by Wei Yu and published by Gulf Professional Publishing. This book was released on 2018-07-29 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shale Gas and Tight Oil Reservoir Simulation delivers the latest research and applications used to better manage and interpret simulating production from shale gas and tight oil reservoirs. Starting with basic fundamentals, the book then includes real field data that will not only generate reliable reserve estimation, but also predict the effective range of reservoir and fracture properties through multiple history matching solutions. Also included are new insights into the numerical modelling of CO2 injection for enhanced oil recovery in tight oil reservoirs. This information is critical for a better understanding of the impacts of key reservoir properties and complex fractures. Models the well performance of shale gas and tight oil reservoirs with complex fracture geometries Teaches how to perform sensitivity studies, history matching, production forecasts, and economic optimization for shale-gas and tight-oil reservoirs Helps readers investigate data mining techniques, including the introduction of nonparametric smoothing models

Well Production Performance Analysis for Shale Gas Reservoirs

Author : Liehui Zhang
Publisher : Elsevier
ISBN 13 : 0444643168
Total Pages : 388 pages
Book Rating : 4.4/5 (446 download)

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Book Synopsis Well Production Performance Analysis for Shale Gas Reservoirs by : Liehui Zhang

Download or read book Well Production Performance Analysis for Shale Gas Reservoirs written by Liehui Zhang and published by Elsevier. This book was released on 2019-05-16 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Well Production Performance Analysis for Shale Gas Reservoirs, Volume 66 presents tactics and discussions that are urgently needed by the petroleum community regarding unconventional oil and gas resources development and production. The book breaks down the mechanics of shale gas reservoirs and the use of mathematical models to analyze their performance. Features an in-depth analysis of shale gas horizontal fractured wells and how they differ from their conventional counterparts Includes detailed information on the testing of fractured horizontal wells before and after fracturing Offers in-depth analysis of numerical simulation and the importance of this tool for the development of shale gas reservoirs

A Well Performance Study of Eagle Ford Shale Gas Wells Integrating Empirical Time-Rate and Analytical Time-Rate-Pressure Analysis

Author : Avery Sutton Davis
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (956 download)

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Book Synopsis A Well Performance Study of Eagle Ford Shale Gas Wells Integrating Empirical Time-Rate and Analytical Time-Rate-Pressure Analysis by : Avery Sutton Davis

Download or read book A Well Performance Study of Eagle Ford Shale Gas Wells Integrating Empirical Time-Rate and Analytical Time-Rate-Pressure Analysis written by Avery Sutton Davis and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, our purpose is to create a "performance-based reservoir characterization" using production data (measured rates and pressures) from a selected gas condensate region within the Eagle Ford Shale (S. Texas). We use modern time-rate ("decline curve") analysis and time-rate-pressure ("model-based") analysis methods to analyze/interpret/diagnose gas condensate well production data. We estimate reservoir and completion properties - specifically: formation permeability, fracture-face skin effect, fracture half-length, and fracture conductivity. We correlate these results with known completion variables - specifically: completed lateral length, total proppant, total water used, and type of hydraulic fracturing fluid. We use the time-rate and time-rate-pressure analyses to forecast future production and to estimate ultimate recovery. Finally, we apply pressure transient analysis methods to those cases where the production history contains shut-in periods of sufficient duration to provide resolution in the pressure build-up data to identify reservoir features and qualitatively validate completion effectiveness. It is noted that ONLY surface pressures are available for the wells considered in this study. We utilize industry-standard software to perform single well rate-time "decline curve" analyses. The traditional "modified-hyperbolic" time-rate model was used as the "basis" relation and the "power-law exponential" time-rate model was used as a check/validation (the power-law exponential model tends to be a more conservative relation for generating forecasts and estimating ultimate recovery). We also utilize industry-standard software to perform single well time-rate-pressure "model-based" analyses --- this methodology is also known as Rate Transient Analysis (RTA). In this work we used the full analytical model for the performance of a Multi-Fracture Horizontal Well (as opposed to a proxy or numerical model). We use Microsoft Excel and a commercial statistical software package to correlate the production analysis results with the measured completion parameters to create "design" relations for well completions - specifically correlations of estimated ultimate recovery with completion variables (completed lateral length, total proppant, total water used, and type of hydraulic fracturing fluid). Finally, we utilize industry-standard software to perform pressure transient analysis on the cases where the quality and relevance of the shut-in pressure data warranted such analyses. In this work, we "cross-validate" the estimated ultimate recovery results by comparison of the time-rate and time-rate-pressure analysis results. The correlation of EUR with completion variables, we propose, is shown to be statistically relevant for almost all combinations of variables, and the correlation relation should be applicable for creating completion designs. The analysis of surface-derived pressure transient data is successfully demonstrated for several cases taken from the gas condensate region of the Eagle Ford Shale (S. Texas). The work we perform in this thesis clearly demonstrates the validity of using empirical (time-rate) and analytical (time-rate-pressure) analysis methods for the purpose of characterizing well performance for wells in the gas condensate region of the Eagle Ford Shale (S. Texas). The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/155432

Well Performance Analysis for Low to Ultra-low Permeability Reservoir Systems

Author : Dilhan Ilk
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (686 download)

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Book Synopsis Well Performance Analysis for Low to Ultra-low Permeability Reservoir Systems by : Dilhan Ilk

Download or read book Well Performance Analysis for Low to Ultra-low Permeability Reservoir Systems written by Dilhan Ilk and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Unconventional reservoir systems can best be described as petroleum (oil and/or gas) accumulations which are difficult to be characterized and produced by conventional technologies. In this work we present the development of a systematic procedure to evaluate well performance in unconventional (i.e., low to ultra-low permeability) reservoir systems. The specific tasks achieved in this work include the following: 1) Integrated Diagnostics and Analysis of Production Data in Unconventional Reservoirs: We identify the challenges and common pitfalls of production analysis and provide guidelines for the analysis of production data. We provide a comprehensive workflow which consists of model-based production analysis (i.e., rate-transient or model matching approaches) complemented by traditional decline curve analysis to estimate reserves in unconventional reservoirs. In particular, we use analytical solutions (e.g., elliptical flow, horizontal well with multiple fractures solution, etc.) which are applicable to wells produced in unconventional reservoirs. 2) Deconvolution: We propose to use deconvolution to identify the correlation between pressure and rate data. For our purposes we modify the B-spline deconvolution algorithm to obtain the constantpressure rate solution using cumulative production and bottomhole pressure data in real time domain. It is shown that constant-pressure rate and constant-rate pressure solutions obtained by deconvolution could identify the correlation between measured rate and pressure data when used in conjunction. 3) Series of Rate-Time Relations: We develop three new main rate-time relations and five supplementary rate-time relations which utilize power-law, hyperbolic, stretched exponential, and exponential components to properly model the behavior of a given set of rate-time data. These relations are well-suited for the estimation of ultimate recovery as well as for extrapolating production into the future. While our proposed models can be used for any system, we provide application almost exclusively for wells completed in unconventional reservoirs as a means of providing estimates of time-dependent reserves. We attempt to correlate the rate-time relation model parameters versus model-based production analysis results. As example applications, we present a variety of field examples using production data acquired from tight gas, shale gas reservoir systems.

Factors Affecting Hydraulically Fractured Well Performance in the Marcellus Shale Gas Reservoirs

Author : Tunde A. Osholake
Publisher :
ISBN 13 :
Total Pages : 99 pages
Book Rating : 4.:/5 (77 download)

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Book Synopsis Factors Affecting Hydraulically Fractured Well Performance in the Marcellus Shale Gas Reservoirs by : Tunde A. Osholake

Download or read book Factors Affecting Hydraulically Fractured Well Performance in the Marcellus Shale Gas Reservoirs written by Tunde A. Osholake and published by . This book was released on 2010 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Challenges in Modelling and Simulation of Shale Gas Reservoirs

Author : Jebraeel Gholinezhad
Publisher : Springer
ISBN 13 : 3319707698
Total Pages : 96 pages
Book Rating : 4.3/5 (197 download)

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Book Synopsis Challenges in Modelling and Simulation of Shale Gas Reservoirs by : Jebraeel Gholinezhad

Download or read book Challenges in Modelling and Simulation of Shale Gas Reservoirs written by Jebraeel Gholinezhad and published by Springer. This book was released on 2017-12-27 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the problems involved in the modelling and simulation of shale gas reservoirs, and details recent advances in the field. It discusses various modelling and simulation challenges, such as the complexity of fracture networks, adsorption phenomena, non-Darcy flow, and natural fracture networks, presenting the latest findings in these areas. It also discusses the difficulties of developing shale gas models, and compares analytical modelling and numerical simulations of shale gas reservoirs with those of conventional reservoirs. Offering a comprehensive review of the state-of-the-art in developing shale gas models and simulators in the upstream oil industry, it allows readers to gain a better understanding of these reservoirs and encourages more systematic research on efficient exploitation of shale gas plays. It is a valuable resource for researchers interested in the modelling of unconventional reservoirs and graduate students studying reservoir engineering. It is also of interest to practising reservoir and production engineers.

An Investigation of Regional Variations of Barnett Shale Reservoir Properties, and Resulting Variability of Hydrocarbon Composition and Well Performance

Download An Investigation of Regional Variations of Barnett Shale Reservoir Properties, and Resulting Variability of Hydrocarbon Composition and Well Performance PDF Online Free

Author : Yao Tian
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (66 download)

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Book Synopsis An Investigation of Regional Variations of Barnett Shale Reservoir Properties, and Resulting Variability of Hydrocarbon Composition and Well Performance by : Yao Tian

Download or read book An Investigation of Regional Variations of Barnett Shale Reservoir Properties, and Resulting Variability of Hydrocarbon Composition and Well Performance written by Yao Tian and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2007, the Barnett Shale in the Fort Worth basin of Texas produced 1.1 trillion cubic feet (Tcf) gas and ranked second in U.S gas production. Despite its importance, controls on Barnett Shale gas well performance are poorly understood. Regional and vertical variations of reservoir properties and their effects on well performances have not been assessed. Therefore, we conducted a study of Barnett Shale stratigraphy, petrophysics, and production, and we integrated these results to clarify the controls on well performance. Barnett Shale ranges from 50 to 1,100 ft thick; we divided the formation into 4 reservoir units that are significant to engineering decisions. All but Reservoir Unit 1 (the lower reservoir unit) are commonly perforated in gas wells. Reservoir Unit 1 appears to be clay-rich shale and ranges from 10 to 80 ft thick. Reservoir Unit 2 is laminated, siliceous mudstone and marly carbonate zone, 20 to 300 ft thick. Reservoir Unit 3 is composed of multiple, stacked, thin (~15-30 ft thick), upward coarsening sequences of brittle carbonate and siliceous units interbedded with ductile shales; thickness ranges from 0 to 500 ft. Reservoir Unit 4, the upper Barnett Shale is composed dominantly of shale interbedded with upward coarsening, laterally persistent, brittle/ductile sequences ranging from 0 to 100 ft thick. Gas production rates vary directly with Barnett Shale thermal maturity and structural setting. For the following five production regions that encompass most of the producing wells, Peak Monthly gas production from horizontal wells decreases as follows: Tier 1 (median production 60 MMcf) to Core Area to Parker County to Tier 2 West to Oil Zone-Montague County (median production 10 MMcf). The Peak Monthly oil production from horizontal wells is in the inverse order of gas production; median Peak Monthly oil production is 3,000 bbl in the Oil Zone-Montague County and zero in Tier 1. Generally, horizontal wells produce approximately twice as much oil and gas as vertical wells. This research clarifies regional variations of reservoir and geologic properties of the Barnett Shale. Result of these studies should assist operators with optimization of development strategies and gas recovery from the Barnett Shale.

The Economic Impact of the Value Chain of a Marcellus Shale Well

Author : Bill Hefley
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)

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Book Synopsis The Economic Impact of the Value Chain of a Marcellus Shale Well by : Bill Hefley

Download or read book The Economic Impact of the Value Chain of a Marcellus Shale Well written by Bill Hefley and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Economic Impact of the Value Chain of a Marcellus Shale Well Site examines the direct economic impact of a Marcellus Shale well located in Southwestern Pennsylvania. This study seeks to fill a critical information gap on the impact of gas drilling and extraction from Marcellus Shale deposits deep underground: an assessment of the economic impacts - emphasizing the direct economic impact, rather than just focusing on the perceived benefits and impacts affecting the region. Our analysis is based on extensive field research, including a site visit and interviews with industry participants. It is further cross-validated by examining similar costs for development of Marcellus Wells by a vertically-integrated exploration and production firm.

Long-term Well Performance Prediction in Unconventionaltight Gas And Shale Gas Reservoirs

Author : Pichit Vardcharragosad
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (94 download)

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Book Synopsis Long-term Well Performance Prediction in Unconventionaltight Gas And Shale Gas Reservoirs by : Pichit Vardcharragosad

Download or read book Long-term Well Performance Prediction in Unconventionaltight Gas And Shale Gas Reservoirs written by Pichit Vardcharragosad and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Unconventional tight gas and shale gas are the largest and fastest growing natural gas supply in the US. Natural gas produced from tight gas and shale gas reservoirs accounts for 60% of U.S. natural gas production in 2011. This number is expected to increase to 73% in 2040 (EIA, 2013). The lack of understanding and the lack of tools that can be applied to these unconventional plays are the major challenges. In unconventional tight gas and shale gas, the conventional reservoir engineering tools have been proven to be unsuccessful because they fail to capture the large differences in physical properties which heavily impact the production behaviors. The main differences include the ultra-low permeability of the formation, presence of adsorbed phase, and the need for multi-stage hydraulically fractured horizontal well completion to create massive flow area.This study aims to develop new reservoir engineering analysis techniques which fully apply for unconventional tight gas and shale gas reservoirs. The new techniques should be able to capture the reservoir responses that are characterized by the transient flow regime and the multi-mechanistic flow in ultra-low permeability formations, the complex flow pattern from hydraulic fracture completion, and the natural gas desorption. We focus on formulating the fundamental, physics-based governing equation for these tight gas and shale gas reservoirs, as well as the long-term analysis and prediction tools that can capture their physical properties. The research applies new promising tools, a density approach, which was proposed to the industry by our research group. In the density method, gas diffusivity equation will be solved in a density-based form, and effects of reservoir depletion on fluid properties are captured through dimensionless variable, [lambda]-[beta]. The density method has been proven to be a reliable production data analysis tool applicable to conventional gas reservoirs produced under constant flowing pressure, constant flow rate, variable pressure/rate constraint as well as in reservoirs with significant rock compressibility. In this thesis, we prove that density-based technique can be further extended to analyze production data from i) gas linear and fractal flow under boundary dominating condition, ii) gas radial, linear, and fractal flow with significant transient flow period, and iii) gas flow under slippage and desorption effects. We demonstrate that [lambda]-[beta] can effectively quantify effects of depletion on gas properties in reservoirs with linear, radial, and fractal flow. We also show how to incorporate slippage and desorption effects as well as transient flow effect by properly modified definitions of [lambda]-[beta]. Based on these results, we are able to show that the density-based production analysis tools, originally developed for conventional gas reservoirs under boundary dominated radial flow, can be applied to predict and analyze production from unconventional gas reservoirs. In addition, we are able to use these density-based tools to analyze the impact of flow geometries on production decline behavior of gas wells.

Fine Scale Characterization of Shale Reservoirs

Author : Mehdi Ostadhassan
Publisher : Springer
ISBN 13 : 3319760874
Total Pages : 99 pages
Book Rating : 4.3/5 (197 download)

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Book Synopsis Fine Scale Characterization of Shale Reservoirs by : Mehdi Ostadhassan

Download or read book Fine Scale Characterization of Shale Reservoirs written by Mehdi Ostadhassan and published by Springer. This book was released on 2018-03-24 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the authors' extensive experience and interdisciplinary approach to demonstrate how acquiring and integrating data using a variety of analytical equipment can provide better insights into unconventional shale reservoir rocks and their constituent components. It focuses on a wide range of properties of unconventional shale reservoirs, discussing the use of conventional and new analytical methods for detailed measurements of mechanical properties of both organic and inorganic constituent elements as well as of the geochemical characteristics of organic components and their origins. It also addresses the investigation of porosity, pore size and type from several perspectives to help us to define unconventional shale formation. All of these analyses are treated individually, but brought together to present the rock sample on a macro scale. This book is of interest to researchers and graduate students from various disciplines, such as petroleum, civil, and mechanical engineering, as well as from geoscience, geology, geochemistry and geophysics. The methods and approaches can be further extended to biology and medicine.

Shale Gas Reservoirs Development Strategies Via Advanced Well Architectures

Author : Mari Alqahtani
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (927 download)

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Book Synopsis Shale Gas Reservoirs Development Strategies Via Advanced Well Architectures by : Mari Alqahtani

Download or read book Shale Gas Reservoirs Development Strategies Via Advanced Well Architectures written by Mari Alqahtani and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of unconventional reservoirs relies extensively on Massively Hydraulically Fractured Horizontal Wells (MHFHW) to produce economic production rates. However, as the desired half-length of the massive hydraulic fracture increases, its effective half-length and level of confinement decrease while its associated cost increases. These aforementioned disadvantages become more pronounced in ultra-tight and naturally fractured formations, such as shale gas formations. On the other hand, Complex Wells (CW) are becoming an attractive alternative to MHFHW in unconventional formations. CW have an extended reach and advanced structures that increase their contact with the reservoir, thus enhancing their productivity. The field application of CW in unconventional formations is increasing, especially with technological advances in directional drilling and geo-steering. With such an increasing architecture complexity of CW and the heterogeneous nature of shale gas formations, a quick yet robust expert system is needed to predict their production profiles, analyze their transient data, and design their well configurations.Developing an analytical model to predict complex CW performance is an arduous task, especially in unconventional formations. In addition, the mere use of numerical modeling to design a well that matches a desired production profile requires significant time investment to model all possible scenarios and then to optimize. Furthermore, traditional well testing methods do not capture the complex interaction between CW and shale formations. In addition, they require manpower, equipment, a lot of time, and capital investment. However, the Artificial Neural Networks (ANN) ability to recognize nonlinear relations that govern fluid flow in porous media and instantly predict results, makes it an attractive method. Therefore, in this study, several ANN are trained to perform three major tasks instantaneously. The first task is to predict CW performance of a given well configuration from a given shale gas reservoir. The second task is to predict the well configuration that will produce a desired production profile from a given shale gas reservoir. The third task is to predict the reservoir properties from a given production profile and well configuration.A commercial numerical reservoir simulator is used to generate a database to train, validate, and test the ANN used in this study. For each ANN, the database becomes the source of input and output parameters, which include production profiles, well design parameters, well operating conditions, and reservoir properties. A new database is generated for each task. All input parameters are randomly generated within their natural maximum and minimum values to build the reservoir simulation cases.

The Marcellus Shale Gas Resource

Author : Clark D. Richardson
Publisher : Nova Science Publishers
ISBN 13 : 9781624177590
Total Pages : 0 pages
Book Rating : 4.1/5 (775 download)

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Book Synopsis The Marcellus Shale Gas Resource by : Clark D. Richardson

Download or read book The Marcellus Shale Gas Resource written by Clark D. Richardson and published by Nova Science Publishers. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chapters that are "edited, reformatted and augmented" versions of Congressional Research Service Publications and the U.S. Geological Survey, National Assessment of Oil and Gas publication, Fact Sheet 2011-3092.

Modern Shale Gas Development in the United States

Author :
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (327 download)

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Book Synopsis Modern Shale Gas Development in the United States by :

Download or read book Modern Shale Gas Development in the United States written by and published by . This book was released on 2009 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A New Method for History Matching and Forecasting Shale Gas/oil Reservoir Production Performance with Dual and Triple Porosity Models

Download A New Method for History Matching and Forecasting Shale Gas/oil Reservoir Production Performance with Dual and Triple Porosity Models PDF Online Free

Author : Orkhan Samandarli
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (818 download)

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Book Synopsis A New Method for History Matching and Forecasting Shale Gas/oil Reservoir Production Performance with Dual and Triple Porosity Models by : Orkhan Samandarli

Download or read book A New Method for History Matching and Forecasting Shale Gas/oil Reservoir Production Performance with Dual and Triple Porosity Models written by Orkhan Samandarli and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Different methods have been proposed for history matching production of shale gas/oil wells which are drilled horizontally and usually hydraulically fractured with multiple stages. These methods are simulation, analytical models, and empirical equations. It has been well known that among the methods listed above, analytical models are more favorable in application to field data for two reasons. First, analytical solutions are faster than simulation, and second, they are more rigorous than empirical equations. Production behavior of horizontally drilled shale gas/oil wells has never been completely matched with the models which are described in this thesis. For shale gas wells, correction due to adsorption is explained with derived equations. The algorithm which is used for history matching and forecasting is explained in detail with a computer program as an implementation of it that is written in Excel's VBA. As an objective of this research, robust method is presented with a computer program which is applied to field data. The method presented in this thesis is applied to analyze the production performance of gas wells from Barnett, Woodford, and Fayetteville shales. It is shown that the method works well to understand reservoir description and predict future performance of shale gas wells. Moreover, synthetic shale oil well also was used to validate application of the method to oil wells. Given the huge unconventional resource potential and increasing energy demand in the world, the method described in this thesis will be the "game changing" technology to understand the reservoir properties and make future predictions in short period of time.

Studies of Influencing Factors for Shale Gas Reservoir Performance

Author : Jiaqi Wang
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (882 download)

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Book Synopsis Studies of Influencing Factors for Shale Gas Reservoir Performance by : Jiaqi Wang

Download or read book Studies of Influencing Factors for Shale Gas Reservoir Performance written by Jiaqi Wang and published by . This book was released on 2014 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Shale gas resource plays a significant role in energy supply worldwide. For economic production of shale gas, technologies of horizontal well and hydraulic fracturing are used for shale gas reservoirs. Therefore, the productivity of the shale gas reservoirs will be influenced by both reservoir condition, and hydraulic fracture properties. In this thesis, parameters that will influence shale gas production were classified into two categories: reservoir properties and hydraulic fracture properties. Published shale gas simulation studies were surveyed for determining the typical ranges of those properties. CMG-GEM was employed to finish the reservoir simulation work, and CMG-CMOST was used to complete the sensitivity analysis work. A three dimensional single phase dual-permeability shale gas reservoir model was created. Three flow mechanisms (Darcy flow, Non-Darcy flow, and Gas diffusion) as well as gas adsorption and desorption mechanism were considered in this model. Sensitivity checks for each parameter were performed to analyze the effect of factors to forecast the production of shale gas reservoir. Influences of reservoir and hydraulic fracture parameters for different time periods were quantified by simulation of 1 yr., 5 yr., 10 yr., and 20 yr. production"--Abstract, page iii.

Artificial Expert Systems For Rate Transient Analysis Of Fishbone Wells Completed In Shale Gas Reservoirs

Author : Ibrahim Bukhamseen
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (894 download)

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Book Synopsis Artificial Expert Systems For Rate Transient Analysis Of Fishbone Wells Completed In Shale Gas Reservoirs by : Ibrahim Bukhamseen

Download or read book Artificial Expert Systems For Rate Transient Analysis Of Fishbone Wells Completed In Shale Gas Reservoirs written by Ibrahim Bukhamseen and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Reservoir simulation is the most important tool petroleum engineers use to forecast production performance and set production strategies for oil and gas fields. Nonetheless, thorough reservoir simulation is a time consuming process that requires powerful computational capabilities and highly skilled individuals in reservoir engineering, mathematics, and programing. The accuracy of the simulation process is affected by the availability and quality of reservoir characteristics. These characteristics are obtained using different data acquisition methods such as open-hole logging, well testing, and core analysis which is costly and time consuming. Another factor that affects production performance is horizontal and multilateral well configurations. These well completions are used to increases production rate and enhance sweep efficiency. However, the design of horizontal and multilateral wells is a complex task that involves engineering and economic constraints.This thesis demonstrates the development of artificial expert systems that are not only capable of forecasting, but also robust in multilateral well design and reservoir evaluation. The study covers a wide range of well completions and shale gas reservoirs properties. Using artificial neural networks (ANN), the developed approach delivers forward-looking and inverse-looking solutions to relate between reservoir characteristics, well configurations, and production performance. Production Performance Expert System forecasts the gas rate and cumulative gas production of a given well completed in a shale gas reservoir, and thus it is categorized as a forward-looking solution. The average error of the results generated by the first system is 6.5%. The second expert systems provides an inverse-looking solution to propose multilateral well design given a target production of a specific reservoir. Well design parameters are produced within an average error of 5%. The third and final system is capable of predicting shale reservoir properties by analyzing the production performance of a horizontal or multilateral fishbone well completion. The developed system is capable of predicting reservoir characteristics with an average error of 4.5% from the target data. The developed set of expert systems is expected to reduce the long hours required for excessive computations, which are typical in reservoir simulators. In addition, it can reduce costs of reservoir evaluation by working as an auxiliary tool to expensive well tests, logging operations, and core analysis. However, it is worth mentioning that these expert systems do not replace conventional reservoir simulators, rather they help in enhancing the decision making process by making educated estimations of reservoir properties and basic designs of multilateral wells to be used in history matching and field development or infill drilling strategies.A graphical user interface (GUI) has been developed to offer user accessibility to the aforementioned artificial expert systems. It provides easy execution of codes and neural networks without requiring knowledge of the background mechanism. This interface allows the user to provide their own input data to simulate any desired scenario within the dataset limits. The results of each case are shown graphically or numerically.