氮气泡沫压裂技术在延川南煤层气田深煤层井中的应用  

Application of Nitrogen Foam Fracturing Technology in Deep Coalbed Wells in South Yanchuan CBM field

作　　者：张占龙 南树泉 曹雪健 Zhang Zhanlong;Nan Shuquan;Cao Xuejian(Sinopec Linfen CBM branch,Shanxi,Linfen 041000)

机构地区：[1]中石化临汾煤层气分公司,山西临汾041000

出　　处：《石化技术》2020年第12期119-120,17,共3页Petrochemical Industry Technology

摘　　要：针对延川南煤层气田深煤层气井存在的低孔隙度、低渗透率、低产气、高含气的“三低一高”现状,分析了常规活性水压裂对储层改造效果差的原因,并分析了氮气泡沫压裂对煤层进行储层改造时具有滤失小,返排效果好,伤害小,携砂性能高的优点。现场应用1口井,增产效果明显。实践证明,氮气泡沫压裂技术能增产能稳产,表明该措施针对高应力、低渗区的低效井具有较好的适应性。The deep coal reservoir in South Yanchuan CBM filed is characterized by low porosity,low permeability,low gas production and high gas-bearing status.Based on production datas analysis of the deep wells,we found out that conventional active water fracturing had poor effect on reservoir reconstruction.By comparison with hydraulic fracturing technology,the nitrogen foam fracturing on the reservoir reconstruction of the coal bed has several advantages,such as low filtration,good backflow effect,small reservoir damage and high sand carrying performance.1 field test had done,and we got a good effect of increasing yield.The practice shows that after using the nitrogen foam fracturing technology,the deep CBM wells in high stress and low permeability areas,can have higher and stabler yields.The measure has a good adaptability to low productive wells。

关 键 词：延川南煤层气田 深煤层气井 活性水压裂 氮气泡沫压裂 增产效果 

分 类 号：TE377[石油与天然气工程—油气田开发工程]