渝东南常压页岩气压裂关键技术研究与应用  

Research and application of key technologies for fracturing of normal pressure shale in Southeastern Chongqing

作　　者：岑涛[1] 夏海帮[1] 雷林[1] CEN Tao;XIA Haibang;LEI Lin(Shale Gas Project Department of Nanchuan,Sinopec East China Oil and Gas Company,Chongqing 408400,China)

机构地区：[1]中国石化华东油气分公司南川页岩气项目部,重庆408400

出　　处：《油气藏评价与开发》2020年第5期70-76,共7页Petroleum Reservoir Evaluation and Development

基　　金：国家科技重大专项"彭水地区高效钻井及压裂工程工艺优化技术"(2016ZX05061-010);国家科技重大专项"彭水地区常压页岩气勘探开发示范工程"(2016ZX05061);中国石化重大先导项目"南川—彭水非常规天然气重点领域攻关与增储评价研究"(YTBXD-02-02-2019-Ⅳ)。

摘　　要：为了解决渝东南常压页岩气储层因水平应力差大和高角度裂缝发育等地质特点难以形成复杂缝网体系,进而难以实现经济开发这一问题,开展了常压页岩气藏压裂关键技术应用研究。通过对彭水区块常压页岩气水平井压裂技术分析,借鉴国外海相页岩气压裂成功经验的基础上,不断探索,对压裂改造规模、连续加砂工艺和段内暂堵转向优化等关键技术不断优化,从而提高裂缝的复杂程度,增大单段改造体积形成大型复杂缝网。在LY2HF井和JY10HF井的现场应用分别取得了日产气9.6×104m3和16.7×104m3的良好效果,从而实现常压页岩气的经济开发。The normal pressure shale gas reservoir in Southeastern Chongqing is characterized by large horizontal stress difference and high angle fracture development,so that it is difficult to form the complex fracture network and further realize the economic development.In order to solve these problems,key technologies of fracturing in normal pressure shale gas reservoir is studied.Based on the analysis of the fracturing technology of normal pressure shale gas horizontal wells in the Pengshui block,and by drawing on the successful experience of foreign marine shale gas fracturing,the scale of fracturing transformation,continuous sanding process and interim period have been continuously explored and optimized to improve the complexity of fractures and increase the volume of single section reconstruction to form a large-scale complex fracture network.Good results have been achieved in the current application in well-LY2HF and well-JY10HF of daily gas production of 9.6×104 m3 and 16.7×104 m3 respectively,thus realizing the economic development of normal pressure shale gas.

关 键 词：常压页岩气藏 复杂缝网体系 压裂改造规模 连续加砂 段内暂堵转向 

分 类 号：TE357[石油与天然气工程—油气田开发工程]