杜66断块杜家台油层分层系挖潜开发对策  

Development countermeasures for layered series of Dujiatai oil layer in Du66 fault block

作　　者：李燕敏 LI Yanmin(Undeveloped Reserves Development Company,PetroChina Liaohe Oilfield,Panjin,Liaoning 124010,China)

机构地区：[1]中国石油辽河油田公司未动用储量开发公司,辽宁盘锦124010

出　　处：《世界石油工业》2022年第4期55-60,共6页World Petroleum Industry

摘　　要：杜66断块属于典型薄互层状普通稠油油藏,主力开发层位为杜家台油层,开发初期采用蒸汽吞吐降压方式开采,存在地层压降幅度大、层间动用状况差、吞吐效果变差等问题,储量动用程度较低。结合蒸汽吞吐后油藏条件及地层流体性质,对杜家台油层进行油藏适应性、吞吐后期剩余油分布规律和开发潜力综合分析,制定分层系开发方式,提高储量动用程度。应用效果表明,上覆层系油层发育差、原油黏度高,实施蒸汽吞吐开发;上层系油层动用程度高、地层能量低,实施火烧油层开发;下层系油层原油黏度低、油层连通性好,实施热水驱开发。结果表明,分层系开发可在蒸汽吞吐基础上提高采收率4.5%,对提高和改善同类型油藏采收率具有一定指导意义。Du66 fault block is a typical thin interbedded common thick oil reservoir.The main development horizon is Dujiatai oil layer.At the initial stage of development,steam huff and puff is used to reduce the pressure.There are many problems,such as large range of formation pressure drop,poor interlayer production status,poor huff and puff effect,and low degree of reserves production.Combined with the reservoir conditions and formation fluid properties after steam huff and puff,the reservoir adaptability,residual oil distribution law and development potential of Dujiatai reservoir are comprehensively analyzed,and the development mode of layered system is formulated to improve the degree of reserve production.The application results show that the overlying strata have poor reservoir development and high crude oil viscosity,and steam stimulation development is implemented.The upper oil layer has high production degree and low formation energy,so the development of oil layer by burning is implemented.The lower oil layer has low crude oil viscosity and good reservoir connectivity,and hot water drive development is implemented.The results show that the development of layered system can improve the oil recovery by 4.5%on the basis of steam stimulation,which has certain guiding significance for improving the oil recovery of the same type of reservoirs.

关 键 词：杜66断块 分层 开发 火烧油层 蒸汽驱 吞吐 

分 类 号：TE624[石油与天然气工程—油气加工工程]