摘要
阳泉矿区寺家庄井田8_1号煤段底板中含有大量的煤系气,但目前仍没有获得理想的煤层气增产效果。通过对目标层段岩石进行黏土组分分析,结果显示该段岩石黏土矿物主要为高岭石和伊利石,且含量相近。针对高岭石的速敏效应和伊利石的水敏效应,采用氮气爆破压裂造缝效果明显。压裂初期东西两翼裂缝扩展不均衡,西翼较长,东翼略短。压裂完成后东西两翼裂缝缝长变化相近,裂缝总长276 m。压裂后排采数据显示:气产量维持在790 m^3/d左右,且能保持稳产。相比普通水力压裂,优化后压裂施工效果显著。
81 coal seam floor rock from Sijiazhuang mine of Yangquan Mining area had a large amount of coal measure gas, but there was still no ideal effect at present. The analyse results of clay minerals components in the target layer showed ： the clay minerals of rock were kaolinite and illite, and the contents of these two clay minerals were close. Points at speed sensitive effect of kaolinite and water sensitive effect of illite, effects of nitrogen gas blasting fracturing were obvious. Fracture expansion of the east and west wing at the early stage of fracturing was unbalance, the west wing was long and the east wing was short. After fracturing, the crack length of the east and west wings were similar, total crack length were 276 m The display data of drainage after fracturing showed ：gas production was maintained at about 790 m^3/d, and kept stable production. Compared to ordinary hydraulic fracturing, the effect of the postopfimality fracturing construction was remarkable.
作者
于振锋
郝春生
李军军
王维
杨昌永
姚晋宝
邵显华
Yu Zhenfeng;Hao Chunsheng;Li Junjun;Wang Wei;Yang Changyong;Yao Jinbao;Shao Xianhua(State Key Laboratory of Coal and CBM Co-Extraction,Jincheng 048000,China;Yi＇an Lanyan Company with Limited Liability of Coal and CBM Co-Extraction Technology,Taiyuan 030006,China)
出处
《能源与环保》
2018年第11期152-156,162,共6页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
山西省自然科学基金项目(2015012003)
山西省自然科学基金项目(2016012012)
山西省科技重大专项(MQ2015-02)
关键词
阳泉矿区
寺家庄井田
黏土组分
压裂工艺
Yangquan Mining area
Sijiazhuang Mine Field
clay minerals composition
fracturing technology
