鄂尔多斯盆地定北探区压裂砂堵原因分析及技术对策  

Cause analysis and technical countermeasures of sand plug after fracturing in Dingbei exploratory area of Ordos basin

作　　者：李国锋[1] 王文清[2,3] 刘明明 陈国生[2] 

机构地区：[1]中国石化华北分公司,河南郑州450006 [2]中国石油新疆油田分公司,新疆克拉玛依834000 [3]西南石油大学研究生院,四川成都610500 [4]中国石油天然气勘探开发公司,北京100083

出　　处：《油气藏评价与开发》2012年第5期55-59,共5页Petroleum Reservoir Evaluation and Development

摘　　要：针对定北探区前期压裂施工井全部出现砂堵的现象,通过分析认为砂堵原因主要有储层非均质性较强、存在一定程度的徽裂缝、压裂液耐温抗剪切能力差以及施工参数不匹配等。采取配套适应储层特点的压裂液并通过小型测试压裂了解液体滤失系数、储层物性、地应力等参数,对压裂方案进行优化,加入降低压裂液滤失的屏蔽暂堵剂等对策,在定北7、定北8、定北10等井实现了该区块压裂施工的顺利成功,为加快该区块的勘探开发提供了技术保证。According to the phenomenon of sand plug in all wells after fracturing in Dingbei exploratory area, analysis results attri- bute the phenomenon to the following factors which include strong heterogeneity of reservoir, micro-fracture to some degree, poor performance of fracture fluids in anti-temperature and shear resistance, and unmatched operation parameters. Adopting the frac- ture fluid adapted to reservoir characteristics and the countermeasures clear the parameters of fluid leak-off coefficient, reservoir physical property and crustal stress through small trial fracture, optimizing fracture programs and adding shielding temporarily plug- ging agent to reduce fluid leak-off have helpt the fracturing construction in the wells of DBT, DB8 and DB10 in great success and provided technical support for the exploration and development of the area.

关 键 词：鄂尔多斯盆地 定北探区 压裂 砂堵 技术对策 

分 类 号：TE358.1[石油与天然气工程—油气田开发工程]