鄂尔多斯盆地东缘太原组转向压裂可行性分析  

Feasibility analysis of diversion fracturing of Taiyuan formation in the eastern margin of Ordos basin

作　　者：王鹏[1] 张红杰[1] 张林强[1] 杨生文 杨琦[1] 王学强 WANG Peng;ZHANG Hongjie;ZHANG Linqiang;YANG Shengwen;YANG Qi;WANG Xueqiang(China United Coal Bed Methane Co.,Ltd.,Beijing 100101,China;Engineering Technology Branch of CNOOC Energy Development Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中联煤层气有限责任公司,北京100101 [2]中海油能源发展股份有限公司工程技术分公司,天津300452

出　　处：《石油化工应用》2021年第4期31-35,共5页Petrochemical Industry Application

基　　金：中海油“十三五”重点项目“鄂尔多斯盆地东缘致密气开发钻完井关键技术研究与应用”,项目编号:ZSWSAKY-XM2019-76。

摘　　要：鄂尔多斯盆地东缘太原组压裂后产量递减速度快,气井产量达不到预期。封堵后进行转向压裂是提高气井产量的有效手段之一,对目的层转向压裂的可行性进行分析。通过调研,储层水平应力差和岩石脆性是重复压裂可转性的主要评价指标,利用测井数据计算得到目的层最大、最小水平应力差5.55 MPa,利用实验测得的弹性模量和泊松比计算得到目的层平均脆性指数为33.75%。对比评价标准,结果表明太原组转向压裂可行,为鄂尔多斯盆地东缘提高致密气井转向的可行性提供理论支撑。After fracturing in Taiyuan formation of the eastern margin of Ordos basin,the production decline rate is fast,and gas well production is less than expected.Turning fracturing after plugging is one of the effective means to improve gas well production.The feasibility of turning fracturing in target zone is analyzed.Through investigation,the horizontal stress difference of the reservoir and rock brittleness are the main evaluation indexes of the repeatability of fracturing.The maximum and minimum horizontal stress difference of the target layer is 5.55 MPa calculated by using logging data.The mean brittleness index of the target layer is 33.75%by using the elastic modulus and Poisson's ratio measured experimentally.Compared with the evaluation criteria,the results show that the repeatability of the Taiyuan formation is good,and the diversion fracturing is feasible after the plugging,which provides theoretical support for the feasibility of improving the tight gas well diversion in Linxing gas field.

关 键 词：气井水淹 转向压裂 水平应力 岩石脆性 气井增产 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]