摘要
基于成藏研究,结合宁武盆地南部深洼槽区二叠系下统山二段泥页岩探井勘探实例,详细解剖其钻井资料及压裂参数,结合实际排采效果,综合评价分析宁武盆地页岩气勘探潜力。研究认为:(1)宁武盆地煤系地层为一套泻湖-潮坪和三角洲沉积环境,暗色泥页岩发育,是宁武盆地页岩气成藏重要基础。(2)宁探2井钻遇泥页岩储层,厚度适中,TOC含量高,气测异常高,为优质烃源岩。(3)采用“前置酸液+变粘滑溜水”压裂液体系及“大液量、大排量”体积压裂工艺技术,经试采取得较好产气效果。
Based on the study of reservoir formation,combined with the exploration example of shale exploration well in the second member of the lower Permian Shanxi Formation in the deep trough area of southern Ningwu Basin,the drilling data and fracturing parameters are analyzed in detail,and the exploration potential of shale gas in Ningwu Basin is comprehensively evaluated and analyzed in combination with the actual drainage and production effect.The results show that:(1)coal measure strata in Ningwu Basin are a set of lagoon-tidal flat and delta sedimentary environments,and dark mud shale is developed,which is an important basis for shale gas accumulation in Ningwu Basin.(2)Ningtan No.2 Well encountered mud shale reservoir with moderate thickness,high TOC content,and abnormally high gas measurement,which is a high-quality source rock.(3)By adopting the fracturing fluid system of pre-acid and viscose-slip water,with the volume fracturing technology of large fluid volume and large displacement,a better gas production effect has been achieved after trial production.
作者
王岩
张建国
桑广杰
季斌
WANG Yan;ZHANG Jianguo;SANG Guangjie;JI Bin(Shanxi Coalbed Methane Exploration and Development Branch,PetroChina Huabei Oilfield Company,Shanxi 046000)
出处
《中国煤层气》
2022年第4期37-41,共5页
China Coalbed Methane
关键词
宁武盆地
页岩气
成藏条件
勘探实践
Ningwu Basin
shale gas
accumulation conditions
exploration practice
