鄂尔多斯盆地BL区块长2油藏深部调驱矿场试验  

Oilfield test of deep profile control and flooding in Chang2 reservoir of block BL in Ordos Basin

作　　者：黄飞飞 段旭涛 HUANG Feifei;DUAN Xutao(School of Petroleum Engineering and Environmental Engineering,Yan’an University,Yan’an 716000,China)

机构地区：[1]延安大学石油工程与环境工程学院,陕西延安716000

出　　处：《延安大学学报（自然科学版）》2023年第3期25-28,共4页Journal of Yan'an University：Natural Science Edition

基　　金：陕西省自然科学基础研究计划项目(2023-JC-QN-0540);陕西省教育厅自然科学专项项目(22JK0621)。

摘　　要：针对BL区块长2低渗透油藏含水升高的问题,选取区块内3口注水井开展深部调驱试验。采用自主研发的自适应凝胶体系通过多段塞交替注入措施进行矿场深部调驱,措施历时95 d,共注入调驱液3 616 m~3。措施后,3口注水井平均注水压力提高1.34 MPa,视吸水指数下降7.5 m~3/(d·MPa),PI值增加1.23 MPa;对应18口采油井平均含水率降低了4.2%,合计日增油3.4 t/d,累计增油754.8 t,相对于高液高含水油井,低液低效油井受效更佳。试验效果为提升该区块开发效益提供了技术支撑与借鉴。In response to the problem of increased water content in the low permeability reservoir of Block BL Chang2,three water injection well groups within the block were selected to conduct deep profile control and flooding experiments.The self-developed adaptive gel system was used to carry out the deep profile control and flooding measures in the mine field by alternating injection of multi slugs.The measures lasted 95 days and a total of 3 616 m~3 of profile control and flooding fluid was injected.After the measures were taken,the average injection pressure of the three water injection wells increased by 1.34 MPa,the apparent water absorption index decreased by 7.5 m~3/(d·MPa),and the PI value increased by 1.23 MPa.The average water cut of the corresponding 18 oil production wells decreased by 4.2%.Meanwhile,the total production of these wells increased by 3.4 t/d,resulting in a cumulative increase of 754.8 t.Compared to high liquid and high water cut oil wells,low liquid and low efficiency oil wells showed better effects.The experimental results provide technical support and reference for improving the development efficiency of this block.

关 键 词：鄂尔多斯盆地 低渗透油藏 深部调驱 矿场试验 

分 类 号：TE348[石油与天然气工程—油气田开发工程]