文章摘要
鄂尔多斯盆地中部龙咀沟区长2储层敏感性研究
Sensitivity Study of Chang 2 Reservoir in Longzuigou District, Central Ordos Basin
投稿时间:2021-07-15  修订日期:2021-07-15
DOI:
中文关键词: 鄂尔多斯盆地  龙咀沟区  长2储层  敏感性
英文关键词: Ordos Basin  Longzuigou District  Chang 2 reservoir  Sensitivity
基金项目:陕西省自然科学“连续性油田砂岩输倒体系与石油运移时效性探讨”(2013JM5006),项目主持人:李艳霞。
作者单位邮编
黄英 西安石油大学地球科学与工程学院 710065
王桂成 西安石油大学地球科学与工程学院 710065
曹聪 西安石油大学地球科学与工程学院 710065
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中文摘要:
      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,为研究敏感性对储层渗流的影响,本文在储层岩石学特征和储层孔隙特征研究的基础上,利用敏感性试验的方法对长2储层的速敏性、水敏性、盐敏性、酸敏性以及盐敏性进行了研究。研究结果表明龙咀沟区长2储层主要以浅灰色的细粒长石砂岩为主。其孔隙结构主要以中孔和中小细喉为主。研究区的敏感性具有“三弱两中等”特点,即弱速敏、弱盐敏、弱碱敏和中等偏弱水敏、中等酸敏,且该区发生酸敏的可能性较大,不宜进行酸化改造。故根据储层敏感性特点对其注水开发十分有效,并且强注不仅可以快速提高地层能量,还提高了采收率。
英文摘要:
      The Chang 2 reservoir in the 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, this paper is based on the study of reservoir petrological characteristics and reservoir pore characteristics. The sensitivity test method was used to study the velocity sensitivity, water sensitivity, salt sensitivity, acid sensitivity and salt sensitivity of Chang 2 reservoir. The research results show that the Chang 2 reservoir in Longzuigou area is mainly composed of light gray fine-grained feldspar sandstone. The pore structure is mainly mesopores and small and medium throats. 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 to weak water sensitivity, and moderate acid sensitivity. The possibility of acid sensitivity in this area is relatively high, so it is not suitable to proceed. Acidification transformation. Therefore, its water injection development is very effective according to the sensitivity of the reservoir, and the strong injection can not only quickly increase the formation energy, but also improve the recovery factor.
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