倾斜油藏蒸汽驱后期接替开发方式优化——以辽河断陷盆地西部凹陷欢曙上台阶齐40块为例

发布时间：2018-01-30 12:57

本文关键词： 辽河断陷盆地西部凹陷倾斜油藏蒸汽驱后期间歇蒸汽驱剩余油分布接替开发方式　出处：《新疆石油地质》2017年03期 　论文类型：期刊论文

【摘要】：辽河断陷盆地西部凹陷西斜坡中南段欢曙上台阶齐40块高倾角(10°)油区在蒸汽驱试验区中占比例较大,目前已进入开发后期,产量持续递减,开采成本升高,探索倾斜油藏蒸汽驱后期有效的接替开发方式、进一步提高采收率具有理论意义和实用价值。选取齐40块西部高倾角区4个典型井组,应用Petrel软件和STARS软件分别建立了三维地质模型和数值模拟模型,进行蒸汽驱后期接替开发方式优化设计研究。数值模拟结果表明,莲Ⅰ油层组动用程度较高;莲Ⅱ油层组动用程度较低,剩余油饱和度在60%以上,构造高、低部位剩余油分布差异较小。根据莲Ⅰ和莲Ⅱ油层组剩余油分布特点,蒸汽驱后期可采用分层注汽技术,采用分层注汽技术可提高采收率4.0%.齐40块倾斜油藏蒸汽驱后期接替开发方式优化结果表明,间歇蒸汽驱提高采收率幅度最大,达5.2%;连续蒸汽驱提高采收率4.6%;汽水交替驱和蒸汽空气复合驱提高采收率幅度较小,分别为1.8%和3.2%.采用间歇蒸汽驱开发莲Ⅰ油层组的动用程度大于连续蒸汽驱;间歇蒸汽驱的累计油汽比高于蒸汽空气复合驱及汽水交替驱。因此,综合考虑建议使用间歇蒸汽驱作为后期的接替开发方式。
[Abstract]:The Huanshu upper step of Huanshu upper step in the west depression of Liaohe fault depression occupies a large proportion in the steam drive test area, and the production has been decreasing continuously. It is of theoretical significance and practical value to explore the effective replacement development mode in the later stage of steam flooding in inclined reservoir and to further improve the recovery factor. Four typical wells in the west of Qi-40 block with high dip angle are selected. The 3D geological model and numerical simulation model were established by Petrel software and STARS software, respectively, and the optimization design of subsequent development mode of steam drive was studied. The numerical simulation results show that. The production degree of Lian-I reservoir group is higher than that of Lian-I reservoir group. The residual oil distribution of Lian-II reservoir group is lower, the remaining oil saturation is more than 60%, the structure is high, and the difference of residual oil distribution in low position is small. According to the distribution characteristics of residual oil in Lian-I and Lian-II reservoirs. In the later stage of steam flooding, stratified steam injection technology and stratified steam injection technology can be used to improve the recovery factor of 4.0. The optimized results show that the later development mode of steam flooding in Qi-40 inclined reservoir is optimized. Intermittent steam flooding can increase the recovery rate to 5.2%. Continuous steam flooding improves recovery by 4.6; The range of oil recovery increased by alternating steam flooding and steam air combined flooding was 1.8% and 3.2 respectively. The production degree of Lian I reservoir developed by intermittent steam flooding was larger than that of continuous steam flooding. The cumulative oil-steam ratio of intermittent steam flooding is higher than that of steam / air composite flooding and steam / water alternate flooding.
【作者单位】：东北石油大学计算机与信息技术学院;中国石油大学地球物理与信息工程学院;中国石油辽河油田分公司欢喜岭采油厂;
【基金】：国家科技重大专项(2016ZX05012-001);辽河、新疆稠油/超稠油开发技术示范工程(2016ZX05055)
【分类号】：TE357.44
【正文快照】： 3.中国石油辽河油田分公司欢喜岭采油厂,辽宁盘锦124010)齐40块位于辽河断陷盆地西部凹陷西斜坡中南段欢曙上台阶,开发目的层为始新统沙河街组三段莲花油层。2006年,齐40块开始蒸汽驱开发,目前已进入蒸汽驱开发后期,产量持续递减。典型受效单井平均日产油量由初期的8 t降至目

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