滨425区块非均质油藏压裂裂缝参数优化  

Optimization of Fracture Parameters for Heterogeneous Reservoir in B425 Block

作　　者：蒋宝云[1] 周玉龙[1] 陈莉[1] 袁浩仁 汤志斌 马莅 卢聪[2] JIANG Bao-yun;ZHOU Yu-long;CHEN Li;YUAN Hao-ren;TANG Zhi-bin;MA Li;LU Cong(Luming Oil-Gas Exploration & Development Co., Ltd., SINOPEC Shengli Oilfield, Dongying 257000, China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China)

机构地区：[1]中国石化胜利油田鲁明油气勘探开发有限公司,东营257000 [2]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500

出　　处：《科学技术与工程》2021年第22期9322-9329,共8页Science Technology and Engineering

基　　金：国家自然科学基金(51704251);国家科技重大专项(2016ZX05006002)。

摘　　要：胜利油田滨425区块具有储层物性差、非均质性强等特点,水力压裂后存在层间产能差异大、储层动用不充分以及增产有效期短等问题,为此以压后产能为目标,提出滨425区块非均质油藏压裂裂缝参数优化方法。通过纵向精细分层、网格方向调整以及局部网格加密的方式,建立滨425区块沙四段精细化地质模型。建立典型注采井组模型,对油井压裂前后的生产数据进行历史拟合。以压裂后的单井产能为目标,优化裂缝长度和导流能力。结果表明,滨425区块沙四段的四个砂层组物性差异较大,其中一、二砂组的储层物性以及含油性质总体好于三、四砂组;分析不同裂缝参数对压裂后油井产能的影响,优化得到三段压裂层段最优段长分别为90、70、80 m,最优裂缝导流能力为20、25、30 D·cm。该方法能显著提高水力压裂增产效果,为非均质油藏压裂裂缝参数优化提供参考。B425 block of Shengli Oilfield has the characteristics of poor reservoir physical properties and strong heterogeneity.After hydraulic fracturing,there are problems such as large inter-layer productivity differences,inadequate reservoir utilization,and short production increase effective period.Aiming at post-fracturing productivity,an optimization method for fracturing fracture parameters of heterogeneous reservoirs in the B425 block was proposed.A fine geological model of the fourth member of Shahejie Formation in B425 block was established by longitudinal fine layering,grid direction adjustment and local grid refinement.Through the establishment of a typical injection-production well group model,the production data before and after the fracturing of the oil well was historically matched.With the goal of single well productivity after fracturing,the fracture length and conductivity were optimized.The research results show that the reservoir physical properties of the four sand layers in the fourth member of the Shahejie Formation in the B425 block are quite different.The reservoir physical properties of the first and second sand groups are better than those in the third and fourth sand groups.Analyzing the effects of different fracture parameters on the productivity of oil wells after fracturing,the optimal section lengths of the three fractured intervals are 90,70,and 80 m,and the optimal fracture conductivity is 20,25,and 30 D·cm.This method can significantly improve the effect of hydraulic fracturing and stimulation,and provide a reference for the optimization of fracture parameters of heterogeneous reservoirs.

关 键 词：非均质油藏 地质建模 数值模拟 水力压裂 裂缝参数优化 

分 类 号：TE348[石油与天然气工程—油气田开发工程]