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针对鄂尔多斯盆地“低渗、低丰度、低产”气田,地面集输系统主要采用单井高压集气、集中加热、站内节流、轮换计量、节流制冷低温分离脱水,站内集中注醇的集输工艺。与传统直井生产相比,水平井具有“井口回压高、含水量高、单井产量高以及气体流速快”的特点。集气站内节流降压脱水工艺对水平生产井仍具有较好的操作适应性,进站压力范围15～8MPa时,外输压力可达5.3MPa;当进站压力为7.0MPa时,加热炉停止;当进站压力为6.0MPa时,出站压力为2.4MPa,即现有集输工艺的操作下限。
For the Ordos Basin “low permeability, low abundance, low yield ” gas field, the ground gathering and transportation system mainly adopts single well high pressure gas gathering, centralized heating, station throttling, rotation metering, throttling refrigeration cryogenic separation dehydration, Set of transport process. Compared with conventional vertical well production, horizontal wells have the characteristic of “high back pressure in wellhead, high water content, high single well output and high gas velocity”. The throttling and depressurization dehydration process in the gas gathering station still has good operation adaptability to the horizontal production well. When the pitching pressure ranges from 15 to 8MPa, the external pressure can reach 5.3MPa. When the inlet pressure is 7.0MPa, the heating furnace Stop; when the pit pressure is 6.0MPa, the outbound pressure is 2.4MPa, that is, the lower limit of the existing gathering process.