浅层特低渗透油藏水平井产能影响因素研究  

The influencing factors of horizontal wellproductivity in shallow extra-low permeability reservoir

作　　者：吴彦君[1] 孙卫[1] 赵雪娇 焦伟杰 高贝贝 WU Yanjun;SUN Wei;ZHAO Xuejiao;JIAO Weijie;GAO Beibei(Department of Geology/State Key Laboratory for Continental Dynamics,Northwest University,Xi′an 710069,China;Key Laboratory of Coal Resources Exploration and Comprehensive Utilization,Ministry of Natural Resources,Xi′an 710016,China;Shaanxi Provincial Coal Geological Exploration Research Institute Co.,Ltd.,Xi′an 710016,China;Baota Oil Production Plant,Yanchang Oilfield Co.,LTD,Yan′an 710003,China)

机构地区：[1]西北大学地质学系/大陆动力学国家重点实验室,陕西西安710069 [2]自然资源部煤炭资源勘查与综合利用重点实验室,陕西西安710016 [3]陕西煤田地质勘查研究院有限公司,陕西西安710016 [4]延长油田股份有限公司宝塔采油厂,陕西延安710003

出　　处：《西北大学学报（自然科学版）》2021年第4期684-694,共11页Journal of Northwest University（Natural Science Edition）

基　　金：中国博士后科学基金项目(2018M643554);陕西省科技统筹创新工程计划项目(2015KTCL01-09);陕西省青年科技新星基金项目(2019KJXX-054)。

摘　　要：结合水平段长度、储层地质特征以及压裂方式等对浅层特低渗透油藏压裂水平井的产能影响因素进行研究。研究结果表明,在储层地质特征相同的情况下,水平段长度对水平井初期的产能影响较小,但较长的水平段对水平井的累产贡献较大;储层的物性越好,水平井的单井产量越高;不同的压裂方式,对水平井的影响也不同,压裂规模越大,储层的改造程度越高,油井的单井产量越高;射孔簇间距过近或者过远,都会影响到储层的改造效果,并影响到油井的最终产量。研究认为,影响研究区水平井产能的主要因素为储层渗透率,重要因素为压裂工艺、加砂量、簇数、原始含油饱和度,一般因素为储层孔隙度及水平段长度。Based on reservoir characteristics,length of horizontal section and fracturing method,the factors affecting the productivity of fracturing horizontal wells in shallow ultra-low permeability reservoirs are studied.The results show that,with the same reservoir characteristics,the length of horizontal section has little influence on the initial productivity of horizontal wells,and the longer horizontal section contributes more to the cumulative productivity of horizontal wells.The better the physical property of reservoir,the higher the output of horizontal well.Different fracturing methods have different impacts on horizontal wells.Generally speaking,the larger the fracturing scale is,the higher the degree of reservoir reconstruction will be,and the higher the single well output of oil wells will be.When selecting cluster perforation,cluster spacing is too close,which will also affect the effect of reservoir reconstruction and the final production of oil well.At present,the main factors affecting the productivity of horizontal wells in the study area are reservoir permeability,and the important factors are fracturing process,sand content,cluster number and original oil saturation,while the general factors are reservoir porosity and horizontal section length.

关 键 词：灰色关联分析 影响因素 水平井 浅层 特低渗透油藏 

分 类 号：TE357[石油与天然气工程—油气田开发工程]