胜利油田强水敏性稠油储层高温变化特征分析——以王庄油田和金家油田为例  

Analysis of high temperature variation characteristics of heavy oil reservoirs with strong water sensitivity in Shengli Oilfield

作　　者：路言秋[1] 李伟忠[1] 李伟[1] 胡小龙 LU Yanqiu;LI Weizhong;LI Wei;HU Xiaolong(Exploration&Development Research Institute of Shengli Oilfield Company,SINOPEC,Dongying 257015,Shandong,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

出　　处：《石油地质与工程》2024年第6期79-84,共6页Petroleum Geology and Engineering

摘　　要：强水敏性稠油油藏在热采开发过程中受到高温作用影响,储层发生一系列变化。为明确其变化特征,对胜利油田具强水敏性的王庄油田和金家油田热物理模拟等实验后矿物、微观孔喉结构、物性等变化进行了对比,并进行了异同性分析。强水敏性稠油储层变化的相似性主要体现在:当温度低于150℃时,蒙脱石晶间距较大,溶蚀、转化程度弱,膨胀性较强,使孔隙结构复杂,渗透性变差;当温度高于150℃后,高温抑制蒙脱石膨胀,转化、溶蚀增强,产生较大溶蚀孔隙,改善孔隙结构,增大连通性,储层渗透性变好;其差异性主要体现在高温溶蚀颗粒对储层的影响上,温度为150℃时,王庄油田溶蚀颗粒浓度最高,浓度变化总体是先增后减,随着周期的增加而减少,颗粒对储层的影响小,而金家油田颗粒浓度随温度升高而大幅增加,堵塞孔喉,油井普遍存在供液不足的现象,因此,王庄油田主要开发矛盾为强水敏,而金家油田的主要开发矛盾除了强水敏外,还有强速敏。During the thermal recovery process of heavy oil reservoirs with strong water sensitivity,a series of changes occur in the reservoir due to the high temperature effect.To clarify its changing characteristics,a comparison was made between the mineral,micro pore throat structure,physical properties,and other changes in the Wangzhuang and Jinjia Oilfields with strong water sensitivity in Shengli Oilfield after thermal physical simulation experiments,and an isotropic analysis was conducted.The similarity of changes in heavy oil reservoirs with strong water sensitivity is mainly reflected in:when the temperature is below 150℃,the spacing between montmorillonite crystals is large,the degree of dissolution and transformation is weak,and the expansion is strong,making the pore structure complex and permeability worse;when the temperature exceeds 150℃,the high temperature suppresses the expansion of montmorillonite,enhances transformation and dissolution,generates larger dissolution pores,improves pore structure,increases permeability,and improves reservoir permeability.The difference is mainly reflected in the impact of high-temperature dissolution particles on the reservoir.At 150℃in Wangzhuang Oilfield,the concentration of dissolution particles is highest,and the overall concentration change is first increasing and then decreasing,decreasing with the increase of the cycle.The impact of particles on the reservoir is small,while in Jinjia Oilfield,the particle concentration increases greatly with the increase of temperature,blocking the pore throat,and the oil well generally lacks liquid supply.Therefore,it is clear that the main development contradiction of Wangzhuang Oilfield is strong water sensitivity,while in Jinjia Oilfield it is not only strong water sensitivity,but also strong speed sensitivity.

关 键 词：强水敏 蒙脱石 孔隙结构 渗透性 

分 类 号：TE112.23[石油与天然气工程—油气勘探]