摘要
B201-H1井为丰都区块第一口页岩气水平井,主力层位为五峰-龙马溪组,在完成27段分段体积压裂之后,试气结论为特低产气层。从储层可压性、施工数据、产剖测试和微地震监测结果等方面,分析评价了B201-H1井的压裂效果。B201-H1井涉及储层的可压性一般,形成复杂缝网的难度较大;多段缝高失控,造缝和加砂困难,压裂后裂缝的长宽比较大,形成长而窄裂缝。压裂后产气量低,主要原因在于储层物性差、地层压力偏低,而压裂裂缝复杂程度不够、导流能力较低,沟通了水层、返排速度慢,这些也是导致压后产气量低的重要因素。在该井实施的多段数分段压裂,基本达到了认识储层的目的。
The B201-H1 well is the first shale gas horizontal well in the Fengdu block,whose main stratum is Wufeng-Longmaxi Formation.After completing the 27-stage volumetric fracturing,the test gas conclusion is that it belongs to the ultra-low gas production layer.The fracturing effect evaluation of the B201-H1 well is carried out from the aspects of reservoir compressibility,construction data,production section test and micro-seismic monitoring.The analysis shows that the B201-H1 well is difficult to form complex fracture networks with general reservoir compressibility;the multi-segment fracture height is out of control;the propagating and sanding are difficult;length-width ratio is relatively large after fracturing;long and narrow fractures are formed.The gas production is low because of poor reservoir property,low formation pressure,and the fracture complexity is not enough,causing low conductivity.The communication of the water layer and the slow returning speed further aggravate the low production.Though fracturing the purpose of understanding the reservoir is basically achieved.
作者
张海杰
徐春碧
肖晖
张雪梅
钟铮
ZHANG Haijie;XU Chunbi;XIAO Hui;ZHANG Xuemei;ZHONG Zheng(Chongqing Shale Gas Exploration and Development Co.Ltd.,Chongqing 401121,China;College of Petroleum and Natural Gas Engineering,Chongqing University of Science and Technology,Chongqing 401331,China;Sichuan Kehong Oil and Gas Engineering Co.Ltd.,Chongqing 400021,China)
出处
《重庆科技学院学报（自然科学版）》
CAS
2019年第5期18-22,共5页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
重庆市科委重点产业共性关键技术创新专项重大主题专项“重庆地区中深层页岩气勘探开发关键技术研究与应用”(cstc2017ZDCY-ZDZX0013)
重庆市基础研究与前沿探索面上项目“页岩压裂楔形裂缝网络中支撑剂运移机理研究”(cstc2019jcyj-msxm2073)
关键词
页岩气
体积压裂
效果评价
微地震
产剖测试
shale gas
volumetric fracturing
evaluation of fracturing effect
microseism
gas production profile test
