特种油气藏2017，Vol.24Issue(1)：170-174,5.DOI:10.3969/j.issn.1006-6535.2017.01.035
页岩气水平井分段压裂微地震监测认识及应用
Understanding and application of microseism monitoring over staged fracturing in horizontal wells for shale gas development
摘要
Abstract
Scales and configurations of fractures formed in staged fracturing of horizontal well for shale gas development may significantly affect productivities of individual wells.Consequently, it is necessary to determine impacts of operation parameters and relevant processes on extension of fractures.With staged fracturing operations in the Well JYXXHF as an example, real-time monitoring for fracturing in the well have been conducted by using surface microseism monitoring techniques.In addition, geologic conditions, fracturing operation parameters and relevant processes have been deployed for comprehensive analyses of monitoring data.Research results show basic fracture networks are basically formed after injection of fracturing fluids with total volume of 1 600 m3 in one interval.After injection of fluids with volume of 1 800 m3, microseism events may hardly increase.In addition, there are certain differences in microseism events in different sublayers with changes in volumes of fracturing fluids injected;Formations encountered in the well have relatively high buried depths.Accordingly, deployment of certain pre-pad may effectively enlarge fracturing area.On the other hand, quantities of microseism events may increase dramatically by transferring to gel injection during the course.Monitoring results show fractures have average half-length of 160 m and maximum half-length of 240 m.Relevant research results may provide necessary references and foundations for design and on-site implementation of fracturing operations in wells for shale gas development.关键词
微地震监测/页岩气/水平井/分段压裂/裂缝规模Key words
microseism monitoring/shale gas/horizontal well/staged fracturing/scale of fracture分类
能源科技引用本文复制引用
陈新安..页岩气水平井分段压裂微地震监测认识及应用[J].特种油气藏,2017,24(1):170-174,5.基金项目
中国石化重点科技项目"涪陵区块页岩气层改造技术研究"(P14092)、"涪陵区块页岩油气有效开发技术研究"(P13053) （P14092）
