海上低渗油藏酸压水平井裂缝参数优化研究  

Research on fracture parameter optimization of acid pressure horizontal well in offshore low permeability reservoir

作　　者：江锚 李威 杨仁锋 牛涛 黄灏 周俊 吴建树 JIANG Mao;LI Wei;YANG Renfeng;NIU Tao;HUANG Hao;ZHOU Jun;WU Jianshu(CNOOC Research Institute Co.,Ltd.,Beijing 100028,China;CNOOC(China)Limited,Shenzhen Branch,Shenzhen Guangdong 518067,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]中海石油(中国)有限公司深圳分公司,广东深圳518067

出　　处：《石油化工应用》2023年第4期17-22,27,共7页Petrochemical Industry Application

基　　金：中海油集团有限公司重大科技项目“海上低渗透油藏压裂开发地质工程一体化研究技术研究”,项目编号:KJGG2022-0701。

摘　　要：南海FQ油田属于发育大型扇三角洲沉积体系的砂泥灰岩互层低孔低渗油藏,非均质性较强,恩平组和文昌组地层沉积相带变化快,火山活动频繁,导致砂体叠置发育,地层岩性和油水关系复杂,但因物性及储集能力较差、储层伤害等限制了储层的高效动用。为了实现油田稳产的主要目标,必须开展酸化压裂增产措施研究。产能数值模拟是评价酸化压裂效果,优化酸化压裂参数的重要手段。通过文献调研,建立了压裂水平井渗流模型。在此基础上,结合测井解释数据,利用数值模拟软件计算了FQ-50H井低渗灰岩地层裂缝参数对产能的影响,优化了水平井筒夹角及对应的裂缝参数,获得了最优裂缝半长及裂缝导流能力组合,为FQ油田水平井压裂改造裂缝参数设计提供了理论依据。The FQ oilfield in the South Sea is a low porosity and low permeability reservoir with sand-marl interbedded with large fan delta sedimentary system,with strong heterogeneity.The sedimentary facies of Enping formation and Wenchang formation change rapidly,and the volcanic activity is frequent,resulting in the development of sand bodies superimposed,and the relationship between stratigraphic lithology and oil and water is complicated.However,due to poor physical properties,reservoir capacity and reservoir damage,the efficient production of the reservoir is restricted.In order to achieve the main goal of stable oil production,it is necessary to study the stimulation measures of acidizing fracturing.Productivity numerical simulation is an important means to evaluate the effect of acidizing fracturing and optimize the parameters of acidizing fracturing.Through literature research,the seepage model of fractured horizontal well is established.On this basis,combined with logging interpretation data,the numerical simulation software is used to calculate the influence of fracture parameters of tight limestone formation in well FQ-50H on productivity,optimize the angle of horizontal wellbore and corresponding fracture parameters,and obtain the optimal fracture half-length and fracture conductivity combination,which provides a theoretical basis for fracture parameter design of horizontal well fracturing in FQ oilfield.

关 键 词：低渗油田 多段压裂 产能分析 非均匀裂缝导流能力 裂缝参数优化 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]