摘要
鄂尔多斯盆地中部龙咀沟区长2储层主要为低孔、特低渗储层。为了研究敏感性对储层渗流的影响,对长2储层的速敏性、水敏性、盐敏性、酸敏性进行了实验分析。研究结果表明,龙咀沟区长2储层以浅灰色细粒长石砂岩为主,其孔隙结构以中孔和中小细喉为主。此外,研究区的储层敏感性表现出“三弱、两中等”的特点,即弱速敏、弱盐敏、弱碱敏,以及中等偏弱水敏、中等酸敏。该区发生酸敏的可能性较大,不宜进行酸化改造。
Chang 2 Reservoir in Longzuigou area of the central Ordos Basin is mainly a low-porosity-ultra-low permeability reservoir.In order to study the influence of sensitivity on reservoir seepage,the velocity sensitivity,water sensitivity,salt sensitivity and acid sensitivity of Chang 2 reservoir are studied.The research results show that Chang 2 reservoir in Longzuigou area is mainly composed of light gray fine-grained feldspar sandstone.The pore structure is mainly medium pore and small and medium fine throat.The sensitivity of the study area has the characteristics of“three weak-two medium”,that is,weak speed sensitivity,weak salt sensitivity,weak alkali sensitivity,moderate-weak water sensitivity,and moderate acid sensitivity.There is a great possibility of acid sensitivity in this area,so it is not suitable to carry out acidizing transformation.
作者
黄英
王桂成
曹聪
HUANG Ying;WANG Guicheng;CAO Cong(Shaanxi Key Laboratory of Petroleum Accumulation Geology,School of Earth Science and Engineering,Xi'an Shiyou University,Xi'an 710065,China)
出处
《重庆科技学院学报（自然科学版）》
CAS
2021年第6期1-4,15,共5页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
陕西省自然科学基金项目“连续性油田砂岩疏导体系与石油运移时效性探讨”(2013JM5006)。
关键词
鄂尔多斯盆地
龙咀沟区
长2储层
敏感性
Ordos Basin
Longzuigou District
Chang 2 reservoir
sensitivity
