考虑启动压力梯度的海上稀油油藏剩余油分布及挖潜界限研究  

Research on Remaining Oil Distribution and Potential Tapping Limit of Offshore Thin Oil Reservoirs Considering Starting Pressure Gradient

作　　者：孟智强 朱志强 王欣然 祝晓林 文佳涛 MENG Zhiqiang;ZHU Zhiqiang;WANG Xinran;ZHU Xiaolin;WEN Jiatao(Tianjin Branch of CNOOC Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《重庆科技学院学报（自然科学版）》2021年第6期26-32,共7页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：“十三五”国家科技重大专项“渤海油田高效开发示范工程”(2016ZX05058)。

摘　　要：在传统黑油模拟器的基础上引入非线性渗流系数,建立了考虑油相启动压力梯度因素影响的黑油模拟器,研究海上大井距开发条件下稀油油藏的剩余油分布规律与挖潜界限。与常规的Eclipse软件模拟结果相比,考虑稀油油藏启动压力梯度后油藏的井间、层间剩余油富集程度加大。以储量动用程度为标准对该油藏加密、纵向的挖潜界限进行量化,其量值为注采井距400 m以上或者渗透率级差10以上。针对J油田的剩余油富集层位进行识别,并实施了开关层作业,实际单井日增油量达到120 m^(3)。The nonlinear seepage coefficient is introduced into the traditional black oil simulator,and a black oil simulator considering the influence of oil phase starting pressure gradient is established to study the remaining oil distribution and potential tapping limits of thin oil reservoirs under the conditions of offshore development with large well spacing.The research shows that after considering the start-up pressure gradient of thin oil reservoirs,compared with conventional Eclipse simulation results,the degree of remaining oil enrichment between wells and interlayers of this type of reservoir increases.Taking the reserve production degree as the standard,the infill and vertical potential tapping limit of the reservoir is quantified,and the distance between injection and production wells is more than 400 m or the permeability difference is more than 10.The identification of remaining oil enrichment zones in the J Oilfield is carried out.Through the implementation of switch-layer operations,the daily oil increase of a single well reaches 120 m^(3).

关 键 词：启动压力梯度 稀油油藏 剩余油 挖潜界限 大井距 渗透率 

分 类 号：TE311[石油与天然气工程—油气田开发工程]