非均相复合驱中黏弹性颗粒驱油剂与储层孔喉匹配关系  

Matching relation between preformed particle gel and reservoir pore throat during heterogeneous phase combination flooding

作　　者：曹绪龙[1] 刘煜 曹伟东 Cao Xulong;Liu Yu;Cao Weidong(Sinopec Shengli Oilfield Company,Shandong Dongying 257001,China;Exploration and Development Research Institute,Sinopec Shengli Oilfield Company,Shandong Dongying 257015,China)

机构地区：[1]中国石油化工股份有限公司胜利油田分公司,山东东营257001 [2]中国石油化工股份有限公司胜利油田分公司勘探开发研究院,山东东营257015

出　　处：《石油学报》2022年第2期262-269,共8页Acta Petrolei Sinica

基　　金：国家科技重大专项“高温高盐油田化学驱提高采收率技术”(2016ZX05011-003);中国石油化工股份有限公司重点科技项目“非均相复合驱提高采收率示范工程”(P19007)资助。

摘　　要：胜利油田聚合物驱后油藏非均相复合驱先导试验取得显著效果,其驱油体系的核心是黏弹性颗粒驱油剂。作为一种新型颗粒驱油剂,黏弹性颗粒驱油剂与储层孔喉之间的匹配关系直接影响非均相复合驱油体系设计及矿场应用效果,但目前尚缺乏有效指导黏弹性颗粒驱油剂与储层孔喉匹配关系分析的方法,且室内实验控制相关变量不够精确。采用球体颗粒堆积体来表征实际的黏弹性颗粒驱油剂,建立了基于亚颗粒堆积的黏弹性颗粒驱油剂微观力学表征模型,实现对黏弹性颗粒驱油剂在多孔介质中运移的定量描述;研究了颗粒物性参数、孔喉大小等因素对黏弹性颗粒驱油剂变形通过孔喉时临界变形压力的影响,建立了黏弹性颗粒驱油剂与储层孔喉匹配关系模板,并通过物理模拟实验结果及模拟计算结果对比验证,该模板具有较高的准确性和有效性;基于该模板优选的黏弹性颗粒驱油剂在孤岛油田中一区Ng3区块扩大试验区矿场应用效果显著,注入压力上升了6.5 MPa,提高采收率9.8%。该模板可实现不同油藏条件下黏弹性颗粒驱油剂的个性化选择,对非均相复合驱油体系设计及非均相复合驱应用具有重要的指导意义。Great success has been achieved in the pilot test of heterogeneous phase combination flooding(HPCF)in the after-polymer flooding reservoir of Shengli oilfield,and the Preformed Particle Gel(PPG)plays a core role in oil displacement system.As a new kind of particle oil displacement agent,the matching relationship between PPG and reservoir pore throat will directly affect the design of the heterogeneous phase combination flooding system and field application effect.However,there still lacks an effective method to analyze the matching relationship between PPG and reservoir pore throat.Besides,the related variables of lab experiment control are not accurate enough.In this study,the spherical particle accumulation body is used to characterize the actual PPG,thus having established a micromechanical characterization model of PPG based on subparticle accumulation to quantitatively describe the migration of PPG in porous media.Moreover,this study explores the effects of physical parameters,pore throat size and other factors on the critical deformation pressure when PPGdeforms to pass through the pore throat.On this basis,the template for the matching relationship between PPG and reservoir pore throat is established;through the comparison and verification of physical simulation test results and simulated calculation results,it is found that this template boasts high accuracy and effectiveness.The PPG optimized based on the template has significant application effect in the expanded test area Zhongyiqu Ng3 block,Gudao oilfield.The injection pressure has increased by 6.5 MPa,and the oil recovery rate has increased by 9.8%.The template can realize the personalized selection of PPG under different reservoir conditions,which is of important guiding significance for the design of HPCF system and the application of HPCF.

关 键 词：黏弹性颗粒驱油剂 储层孔喉 匹配性 微观力学模拟 矿场应用 非均相复合驱 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]