四川盆地W地区龙马溪组页岩气压裂效果评估和产能预测研究

发布时间：2018-03-04 16:14

本文选题：微地震　切入点：压裂　出处：《石油物探》2017年05期 　论文类型：期刊论文

【摘要】：应用水平井H1,H2和H3的微地震、压裂及地震数据综合分析了四川盆地W地区下志留统龙马溪组页岩储层特征。由微地震监测数据分析可知,H1井的压裂主要以激活先期天然裂缝为主,H2井的压裂以形成人工压裂裂缝网络为主,H3井的压裂则以激活先期天然裂缝和人工压裂裂缝网络共同出现为主。分析了有无天然裂缝以及天然裂缝与井筒不同产状关系情况下不同的压裂效果,进而评价了3口水平井的压裂效果,H2井压裂效果最好,H3井次之,H1井较差。最后,利用神经网络技术建立了页岩四大主控因素(总含气量、孔隙度、脆性指数和裂缝密度)地质模型,获得页岩产能数据并将其与具有生产测井数据的H1水平井进行了对比,结合微地震压裂数据对H2井、H3井产能进行了预测,预测结果为H2井产能是H3井的2倍,实际生产测试为2.3倍,吻合性好,页岩产能剖面优化了水平井部署、井轨迹设计、压裂方案参数以及更好的完井设计。
[Abstract]:Using microearthquakes of horizontal well H1H2and H3, Fracturing and seismic data analysis of shale reservoir characteristics of Lower Silurian Longmaxi formation in W area, Sichuan Basin. From the analysis of microseismic monitoring data, we can see that the fracturing of H1 well mainly depends on the activation of pre-natural fractures and the fracturing of H _ 2 well. The fracturing of H3 well mainly formed artificial fracturing fracture network mainly by activating preexisting natural fracture and artificial fracturing fracture network. This paper analyzes whether there are natural fractures and the relationship between natural fractures and different occurrence of wellbore. Different fracturing effects, Furthermore, the fracturing effect of 3 horizontal wells is evaluated. The best fracturing effect of H _ 2 well is that of H _ 3 well. Finally, four main controlling factors (total gas content, porosity) of shale are established by using neural network technology. The brittle index and fracture density) geological model are used to obtain shale productivity data and compare them with H1 horizontal wells with production logging data. Combined with micro-seismic fracturing data, the productivity of H _ 2 well and H _ 3 well is predicted. The prediction results show that the productivity of H 2 well is 2 times that of H3 well, and the actual production test is 2.3 times. The shale productivity profile is optimized for horizontal well deployment, well trajectory design, fracturing parameters and better completion design.
【作者单位】：成都理工大学能源学院;中国石油物探重点实验室-页岩气地球物理研究室;中国石油集团川庆钻探工程有限公司地球物理勘探公司;中国石油集团川庆钻探工程有限公司页岩气勘探开发项目经理部;
【基金】：国家科技重大专项“大型油气田及煤层气开发”(2016ZX05023004)资助~~
【分类号】：P631.4;TE37

【相似文献】