渤海J油田高含水后期压裂井选井选层研究及应用  

Selection of fracturing wells and layers of Bohai J Oil Field in the late stage of high water cut and its application

作　　者：闫建丽 颜冠山 谷志猛 别梦君 张振杰 YAN Jianli;YAN Guanshan;GU Zhimeng;BIE Mengjun;ZHANG Zhenjie(Bohai Oilfield Research Institute,Tianjin Branch of CNOOC Limited,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459

出　　处：《油气藏评价与开发》2021年第5期736-743,共8页Petroleum Reservoir Evaluation and Development

基　　金：中海石油(中国)有限公司综合科研项目“渤海双高油田挖潜关键技术研究”(YXKY-2018-TJ-04)。

摘　　要：针对海上聚驱油田高含水后期剩余油分布复杂及油井压裂选井、选层难度大等问题,综合运用改进后的无因次产液指数计算方法评价油井产液能力,分析了聚驱后油井合理产液变化规律,进而选择无因次产液指数下降幅度大于30%的亟须治理的油井;结合储层精细分析、剩余油精细刻画,进行了高含水后期油藏驱替倍数量化表征和分级评价,有效量化了各层的剩余潜力,建立了渤海J油田高含水后期压裂措施的合理选井、选层的方法和量化依据,保障了海上压裂技术的增油效果。矿场实践表明,该技术方法合理有效,压裂措施实施后单井日增油可达14~42 t,增油效果显著,可为类似处于高含水后期的油田的压裂措施选择及产能改造潜力评价提供借鉴。After the long-term water and polymer flooding,the remaining oil distribution in the late stage of high water cut is complex,and it is difficult to select fracturing wells and layers.In order to solve these problems,an improved calculation method of the dimensionless liquid production index for wells in polymer flooding oilfields is proposed to evaluate the production capability and changes,then the wells that the dimensionless liquid production index dropped more than 30%are selected.At the same time,combined with the fine geology and reservoir analysis,the quantitative characterization of displacement multiple in the late stage of high water cut is studied and the remaining oil for each layer is evaluated.At last,the method of selecting fracturing well and layer in Bohai J Oil Field is established.Field applications showed that this method was reasonable and effective,the oil production incremental for each well after fracturing is about 14 to 42 tons.It can also provide reference for the selection of fracturing measures and the evaluation of well stimulation potential of similar oilfields in the late stage of high water cut.

关 键 词：压裂 高含水后期 选井选层 聚合物驱 渤海 

分 类 号：TE345[石油与天然气工程—油气田开发工程]