致密砂岩气藏储层物性上限界定与分布特征

发布于:2021-07-31 10:21:00

 第 35 卷 第 2 期 文章编号:0253 - 9985(2014)02 - 0238 - 06 OIL & GAS GEOLOGY 2014 年 4 月  doi :10. 11743 / ogg20140210 致密砂岩气藏储层物性上限界定与分布特征 王朋岩 ,刘凤轩 ,马 锋 ,杨 勉 ,林益康 ,卢 冲 1 1 2 1 3 4 (1. 东北石油大学 地球科学学院,黑龙江 大庆 163318; 2. 中国石油 石油勘探开发研究院,北京 100083; 3. 中国石油 青海油田分公司 勘探开发研究院,甘肃 敦煌 736202; 4. 中国石油 青海油田分公司 采油一厂,青海 茫崖 816499) 摘要:致密砂岩气成藏形成过程受到砂岩储层低孔、低渗特点的控制,人们已经认识到只有在某一上限值以下的储层中才会形成大 面积低丰度的致密砂岩气聚集,但这一界限值一直缺少公认的标准。 通过收集国内外典型致密砂岩气藏实测储层物性数据, 经过 统计分析,研究致密储层渗透率、孔隙度分布规律,总结致密物性的形成原因和致密砂岩气成藏特征。 数据分析结果表明国内外典 型致密砂岩气藏常规测试渗透率有超过 80%的数据点小于 0畅 1× 10 级。 据此可以用常规渗透率 0畅 1× 10 - 3 2 - 3 据,认识到致密砂岩储层形成环境多样,深度跨度大,地质年代差异大。 构造活动、 沉积环境和成岩作用是形成储层致密的主要原 因,但在各个盆地具体表现各有不同。 通过气源、构造活动强度和储层致密程度可以圈定致密砂岩气的分布范围。 关键词:常规渗透率;原地渗透率;储层物性;致密砂岩气 中图分类号:TE121畅 1   文献标识码:A μ m 作为致密砂岩储层物性上限,具有合理性和可操作性。 通过统计全球致密砂岩气藏数 μ m 。 经过校正的原地渗透率值比常规渗透率低一个数量 2 Upper limit and distribution of physical property of tight gas sandstones (1. School of Earth Sciences,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;2. Exploration and Production Research Institute,PetroChina,Beijing 100083,China;3. Exploration and Production Research Institute,PetroChina Qinghai Oilfield Company, Dunhuang,Gansu 736202,China;4. No. 1 Oil Production Plant,PetroChina Qinghai Oilfield Company,Mangya,Qinghai 816499,China) Wang Pengyan ,Liu Fengxuan ,Ma Feng ,Yang Mian ,Lin Yikang ,Lu Chong 1 1 2 1 3 4 Abstract :The formation of tight gas is controlled by the low porosity and permeability of sandstone reservoirs . It has been recognized that the accumulation of pervasive low abundance tight gas is possible only when the porosity and permeability of reservoir is above a certain limit value . However , there are no widely accepted criteria for defining this limit value . Based on collection of the measured reservoir property of both domestic and international typical tight gas sands ,we stu - died the statistical distribution patterns of permeability and porosity of tight reservoirs ,and analyzed the causes for reser - voir tightening and the characteristics of tight gas accumulation . Data show that over 80% routine permeability data points - 3 2 have a permeability less than 0畅 1× 10 μ m. The corrected in - situ permeability is about one order of magnitude lower - 3 2 than the routine permeability . Taking the routine permeability value of 0畅 1× 10 μ m as the upper limit of tight gas sands is reasonable and practical . Statistics of tight gas sands over the world shows that tight sandstone reservoirs have di - versity of sedimentary environm

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