济阳坳陷页岩油水平井压裂后生产动态数值模拟研究  

Numerical simulation for production dynamics of horizontal well after fracturing of shale oil in Jiyang Depression

作　　者：蔡鑫 杨勇[2] 曹小朋[3] 于金彪[1] 孙红霞[1] 胡慧芳 汪勇[1] 郑乃元 郑文宽 CAI Xin;YANG Yong;CAO Xiaopeng;YU Jinbiao;SUN Hongxia;HU Huifang;WANG Yong;ZHENG Naiyuan;ZHENG Wenkuan(Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257015,China;Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257001,China;Xianhe Oil Production Plant,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257000,China)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257015 [2]中国石化胜利油田分公司,山东东营257001 [3]中国石化胜利油田分公司现河采油厂,山东东营257000

出　　处：《油气地质与采收率》2025年第2期114-121,共8页Petroleum Geology and Recovery Efficiency

基　　金：中国石化科技攻关项目“页岩油建模数模一体化技术研究”(P22036);东营市自然科学基金项目“咸水层CO_(2)运移与封存机理研究”(2023ZR010)。

摘　　要：济阳页岩油为陆相原生原储型油气藏,埋藏深、成熟度低、压力系数高,大规模体积压裂改造后形成渗流机理复杂的人工改造空间,常规实验方法很难获得改造空间内准确的储层物性,对数值模拟方法提出了新的挑战。针对目前页岩油内部流动规律尚不十分明确的问题,将水平井井筒周围储层构建为灰箱系统,基于前期地质评价工作对储层物性和压裂效果的认识,建立页岩油水平井数值模拟模型,开展济阳页岩油水平井生产规律研究,明确产油量与各影响因素之间的内在联系。模型将水平井井筒周围压裂后的储层刻画为人工主裂缝区、微裂缝改造区和未改造基质区,在考虑压裂液注入储层的基础上,通过对典型页岩油水平井生产动态进行拟合,反演了储层物性,预测了最终采油量,分析了工作制度和压裂裂缝对开发指标的影响规律,并进一步探索了井组开发合理井距的确定方法,为济阳页岩油开发设计优化提供了一定的技术支撑。Jiyang shale oil is a terrestrial self-generated and self-accumulated reservoir with deep burial,low maturity,and high pressure coefficient.Artificial reconstruction spaces with complex flow mechanisms form after large-scale volumetric fracturing,and it isn't easy to obtain accurate physical properties of the reservoir in the stimulated spaces through conventional experiments,which presents new challenges to numerical simulation methods.In view of the unclear internal flow law of shale oil,the reservoir around the wellbore was regarded as a grey box system,and the numerical simulation model of the horizontal well of shale oil was established based on the understanding of physical property and fracturing effect of the reservoir from the previous exploration work.The production law of the horizontal well of shale oil in Jiyang Depression was studied to investigate the internal relationship between oil production and influencing factors.The reservoir around the horizontal well was divided into an artificial main fracture zone,micro-fracture reconstruction zone,and unstimulated matrix zone in the model.By considering fracturing fluid injection into the reservoir,the production dynamics of typical horizontal shale wells of shale oil were fitted,the physical properties of the reservoir were deduced,and the final oil production was predicted.The influence law of the working system and fractures on development indexes were analyzed,and the method for determining the rational well spacing for well group development was further explored,which provided support for the development and design optimization of shale oil in Jiyang Depression.

关 键 词：页岩油 数值模拟 生产动态 合理井距 济阳坳陷 

分 类 号：TE357[石油与天然气工程—油气田开发工程]