Author : Sam Sampath
Publisher :
ISBN 13 :
Total Pages : 138 pages
Book Rating : 4.:/5 (936 download)
Book Synopsis Mainline Initial Optimization by : Sam Sampath
Download or read book Mainline Initial Optimization written by Sam Sampath and published by . This book was released on 2003 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Mackenzie Gas Project (MGP) is proposed to transport gas and liquids produced from fields in the Mackenzie Delta and further inland areas to markets in the south. Produced fluids, after initial field processing, will be transported in a gathering system network as a two-phase mixture to a northern terminus location near Inuvik. Further processing at this terminus will yield gas and stabilized natural gas liquid (NGL) streams. The NGL will be transported in a dedicated pipeline to Norman Wells, where it will be delivered to the existing Enbridge pipeline system for further transportation to markets. The gas stream will be transported in a dedicated pipeline system to the boundary between Northwest Territories and Alberta for delivery to an existing low-pressure pipeline system for further transportation to markets. Initial production from the Mackenzie Delta anchor fields will provide the equivalent of 24000 E3m3/d (0.85 GCFD) of sales gas at the Northwest Territories-Alberta boundary. Additional sources are expected to augment this anchor field capability to 34,000 E3m3/d (1.2 GCFD), which is the target initial design capability for the gas pipeline system. Future production sources could potentially raise this volume further to 54,000 E3m3/d (1.9 GCFD). The purpose of the current study was to evaluate the gas pipeline to select an optimum operating pressure and pipe diameter combination capable of cost effectively transporting the initial design volume of 34,000 E3m3/d (1.2 GCFD), while retaining sufficient flexibility to contract to 24,000 E3m3/d (0.85 GCFD) or practically expand to transport up to 54,000 E3m3/d (1.9 GCFD). Operating pressures in the range of 12.5 MPa (1,800 psig) to 20 MPa (2,900 psig) were examined in increments of 1 MPa for all practical pipe sizes to transport the target initial design volume. Hydraulic performance of the systems, combined with screening level costs, was used to arrive at an optimum system. This study concludes that the NPS 30, 18 MPa system is the preferred pipe size and pressure combination for the gas pipeline. The system will require a total of six compressor stations and one heater station to transport the initial volume of 34,000 E3m3/d (1.2 GCFD). This system can transport 24,000 E3m3/d (0.85 GCFD) with only the initiating station at the Northern Terminus and a station at Norman Wells. Expansion of the system would comprise 12 compressor stations and one heater station to deliver 50,800 E3m3/d (1.8 GCFD) sales gas. Station configurations generated in this study form the basis for the Technical Design Basis, Rev.0 (Ref. 1). Additional conclusions from this study include: 1. Intermediate heaters between compressor stations could either increase system capability or reduce the number of compressor stations. However, the capital and operating cost penalties associated with such configurations do not warrant their consideration for the MGP system. 2. Lowering the geothermal operating temperature limit from -6°C to -8°C will increase system capability, with attendant incremental compression capital and fuel. This temperature reduction is insufficient to reduce facilities for either the initial or expansion configurations. 3. When all relevant factors, including hydraulics, operations, construction logistics and environmental considerations are taken into account, fixing Norman Wells as a location for a station is appropriate" -- leaf 1.
