二连盆地巴音都兰凹陷阿尔善组云质岩储层特征
发布时间：2019-02-18 08:41
【摘要】：为研究巴音都兰凹陷下白垩统阿尔善组富油气云质岩储层特征,利用岩心、铸体薄片、阴极发光薄片、扫描电镜及X射线衍射等资料,对阿尔善组云质岩储层的岩性分类、储集空间类型、物性特征和成岩作用进行了研究。结果表明:阿尔善组云质岩储层主要分为两大类,即云质泥岩和云质砂岩,二者还可根据(铁)白云石的产状进一步细分。云质泥岩主要发育溶蚀孔隙、裂缝和晶间孔隙,孔隙度为4.4%~36.4%,平均为16.01%,渗透率为0.01~26.30 mD,平均为1.92 mD;云质砂岩主要发育溶蚀孔隙,孔隙度为1.1%~33.7%,平均为16.07%,渗透率为0.01~5 163.00 mD,平均为79.72 mD。云质泥岩以交代和溶蚀作用为主,成岩序列为:(铁)白云石的形成→有机酸生成→(铁)白云石的溶蚀;云质砂岩以溶蚀、胶结和交代作用为主,成岩序列为:轻度压实→石英次生加大→(铁)白云石胶结、交代→有机酸生成→(铁)白云石和长石的溶蚀。因此,研究云质岩储层特征对该区阿尔善组油气勘探具有重要意义。
[Abstract]:In order to study the petroliferous reservoir characteristics of the Lower Cretaceous Arshan formation in the Bayindolan Sag, the lithologic classification of the dolomite reservoir of the Alshan formation is made by using the data of core, cast sheet, cathode luminescent sheet, scanning electron microscope and X-ray diffraction. Reservoir space types, physical properties and diagenesis are studied. The results show that the dolomite reservoirs of the Alshan formation can be divided into two main categories, namely, dolomite and dolomite sandstone, which can be further subdivided according to the occurrence of dolomite. Dissolution pores, fractures and intergranular pores are mainly developed in dolomitic mudstone, with porosity of 4.4% and 36.4%, with an average of 16.01, and permeability of 0.01 ~ 26.30 mD, with an average of 1.92 mD;. The dissolution pores are mainly developed in cloud sandstone, with porosity of 1.1g / 33.7, mean value of 16.07m, permeability of 0.01g / 163.00 mD, and average of 79.72 mD. / min. The diagenetic sequence of dolomitic mudstone is metasomatism and dissolution, and the diagenetic sequence is: (iron) dolomite formation, organic acid formation and (iron) dolomite dissolution; Dissolution, cementation and metasomatism are the main types of dolomite. The diagenetic sequence is as follows: slightly compacted quartz secondary augmentation of dolomite cementation, and dissolution of organic acid in metasomatism to form dolomite and feldspar. Therefore, studying the characteristics of dolomite reservoir is of great significance for oil and gas exploration of Alshan formation in this area.
【作者单位】： 中国石油大学(北京)地球科学学院;中国石油大学(北京)油气资源与探测国家重点实验室;中国石油华北油田分公司勘探开发研究院;
【基金】：国家重大科技专项“岩性地层油气藏沉积体系、储层形成机理与分布研究”(编号:2011ZX05001-002) 中国石油华北油田项目“二连盆地特殊岩类储集层特征及其成因机制研究”(编号:HBYT-YJY-2014-JS-307)联合资助
【分类号】：P618.13
本文编号：2425679
[Abstract]:In order to study the petroliferous reservoir characteristics of the Lower Cretaceous Arshan formation in the Bayindolan Sag, the lithologic classification of the dolomite reservoir of the Alshan formation is made by using the data of core, cast sheet, cathode luminescent sheet, scanning electron microscope and X-ray diffraction. Reservoir space types, physical properties and diagenesis are studied. The results show that the dolomite reservoirs of the Alshan formation can be divided into two main categories, namely, dolomite and dolomite sandstone, which can be further subdivided according to the occurrence of dolomite. Dissolution pores, fractures and intergranular pores are mainly developed in dolomitic mudstone, with porosity of 4.4% and 36.4%, with an average of 16.01, and permeability of 0.01 ~ 26.30 mD, with an average of 1.92 mD;. The dissolution pores are mainly developed in cloud sandstone, with porosity of 1.1g / 33.7, mean value of 16.07m, permeability of 0.01g / 163.00 mD, and average of 79.72 mD. / min. The diagenetic sequence of dolomitic mudstone is metasomatism and dissolution, and the diagenetic sequence is: (iron) dolomite formation, organic acid formation and (iron) dolomite dissolution; Dissolution, cementation and metasomatism are the main types of dolomite. The diagenetic sequence is as follows: slightly compacted quartz secondary augmentation of dolomite cementation, and dissolution of organic acid in metasomatism to form dolomite and feldspar. Therefore, studying the characteristics of dolomite reservoir is of great significance for oil and gas exploration of Alshan formation in this area.
【作者单位】： 中国石油大学(北京)地球科学学院;中国石油大学(北京)油气资源与探测国家重点实验室;中国石油华北油田分公司勘探开发研究院;
【基金】：国家重大科技专项“岩性地层油气藏沉积体系、储层形成机理与分布研究”(编号:2011ZX05001-002) 中国石油华北油田项目“二连盆地特殊岩类储集层特征及其成因机制研究”(编号:HBYT-YJY-2014-JS-307)联合资助
【分类号】：P618.13
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