Abstract: Tarim Basin is endowed with rich natural gas resources. For most gas wells，the wellhead pressure is ultra-high. Currently，a high-pressure gas gathering technology is applied to all these wells，with the gas gathering pressure greater than 10 MPa. The wellhead pressure-reducing technology by multi-stage throttling has not fully utilized the residual pressure resources. In addition，its matching electric heat tracing and anti-freeze addition technologies have increased the consumption of electricity and chemicals，resulting in a waste of residual pressure resources. Therefore，it is of great significance to conduct an analysis of the residual wellhead pressure resources in Tarim Oilfield and a discussion on their utilization options. In this paper，exergy analysis approach is applied to establishing a rational theoretical calculation model of pressure energy，so as to accurately calculate the amount of recoverable pressure energy resources at the wellheads of gas wells. Adhering to the principles of maximizing the recovery of residual wellhead pressure resources and ensuring the normal operation of existing gas gathering and processing system，such utilization options of residual pressure resources as electricity generation with residual pressure，natural gas liquefaction，separation of light hydrocarbons and electricity generation-ice making with residual pressure resources are put forward，and their key techniques，technical difficulties and supporting measures are analyzed to avoid a waste of residual pressure resources caused by the use of existing ways of throttling. These utilization options not only save energy，reduce discharge and increase the comprehensive utilization rate of energy resources，but also bring favorable economic benefits，providing theoretical basis for the comprehensive utilization of residual wellhead pressure resources in Tarim Oilfield

Key words: high-pressure gas well, exergy analysis approach, residual pressure resources, residual pressure utilization, Tarim Oilfield

摘要： 塔里木盆地具有丰富的天然气资源，气井井口压力多数超高。目前均采用高压集气工艺，集气压力超过10 MPa，井口采用多级节流降压工艺，不仅未充分利用余压资源，而且配套采用的电伴热、添加防冻剂等工艺增加了电力、药剂消耗，导致余压资源的浪费，开展塔里木气井井口余压资源分析与利用方案探讨意义重大。应用㶲分析法建立合理的压力能理论计算模型，准确计算气井井口可回收压力能的资源量；以最大程度回收井口余压资源、保证现有集气和处理系统正常运行为原则，提出油田余压发电、天然气液化、轻烃分离、余压发电-制冰等余压资源利用方案；并对其关键技术、技术难点及配套措施进行分析，避免采用现有的节流方式浪费余压能源；为促进塔里木油田气井井口余压能源的综合利用提供理论依据，既能够节约能源、减少排放、提升能源综合利用率，又能够产生良好的经济效益。

关键词: 高压气井, ?分析法, 余压资源, 余压利用, 塔里木油田