摘要
对延川南煤层气田在深部煤层气开发中的排采制度、工艺和工具研究细化,由“缓泄压、稳液面、控套压”转变为“前期快排降流压、中期控压稳泵效、后期慢排稳产量、末期补液稳排采”的“一快三稳”排采制度,控制流压降幅0.19MPa-0.12MPa-0.02MPa;高产气井采用井下掺水工艺,中低产气井采用地面隔膜泵自动洗井工艺,结合空心杆洗井工艺,增加气井产液Q >10.63m^(3)/d,配套自制高效气锚工具,有效延长气井免修期。
The paper focuses on the refinement of the extraction system,process,and tools for deep coalbed methane development in the South Yanchuan Coalbed Methane Field.The drainage system shifts from"slow pressure relief,stable liquid level,and controled casing pressure"approach to the"one fast and three stable"system characterized by:fast extraction to reduce flow pressure in the early stage,pressure control to stabilize pump efficiency in the mid-stage,slow extraction to stabilize production in the later stage,and liquid replenishment to stabilize extraction in the final stage.This results in controlled flow pressure decrease of 0.19MPa-0.12MPa-0.02MPa.High-production gas wells use underground water mixing technology,while medium and low-production gas wells use surface diaphragm pump automatic well washing technology,combined with hollow rod well washing technology,to increase gas well fluid production(Q>10.63m^(3)/d)A self-made high-efficiency gas anchor tool is equipped,effectively extending the maintenance-free period of gas wells.
作者
张光荣
邵小平
谢昕翰
杜亚崑
施静尧
ZHANG Guangrong;SHAO Xiaoping;XIE Xinhan;DU Yakun;SHI Jingyao(SINOPEC Linfen Coalbed Methane Branch,Shanxi 041000)
出处
《中国煤层气》
2025年第2期22-26,共5页
China Coalbed Methane
关键词
延川南煤层气田
深部煤层气
排采制度
排采工艺
排采工具
South Yanchuan Coalbed Methane Field
deep coalbed methane
drainage and production system
drainage and production process
drainage tools
