现代地质2013，Vol.27Issue(2)：373-381,388,10.
三角洲前缘亚相致密砂岩储层的成岩作用与有利成岩相带:以鄂尔多斯盆地子洲气田山23段砂岩为例
Diagenesis and Favorable Diagenetic Facies of Tight Sandstone Reservoir in Delta Front Subfacies:A Case Study on the Shan23 Sandstone of Zizhou Gas Field in Ordos Basin
摘要
Abstract
Diagenesis of tight sandstone reservoir is complicated and diagenetic facies presents apparent differences. Based on the testing data of physical property, cast section, SEM, X diffraction and high pressure mercury penetration, the diagenesis and diagenetic facies of Shan3 sandstone of Zizhou gas field in the eastern of Or-dos basin are studied. The results show that lithology is dominated firstly by quartz sandstone, and lithic content increases from west to east. Intergranular pore, emposieu and intercrystal pore are the main pore types. Compaction and pressolution make the primary intergranular pore decrease heavily. Cementation lets the physical property become poor entirely, which has dual influence on reservoir interspaces. Quartz sandstone and lithic quartz sandstone are affected differently by dissolution. Quartz sandstone is corroded more easily. Shan3 2 sandstone of Zizhou gas field entered late diagenetic phase B, and partial indexes went into late diagenetic phase C according to the classification signs of diagenetic stage. Refer to qualitative and quantitative parameters, six dia- genetic facies zones in the study area are classified. Weak compaction, quartz overgrowth intergranular pore-em-posieu belts distributed in the thick sand body of underwater distributary channel are proposed to be the most favorable diagenetic facies. Weak compaction, quartz overgrowth intergranular pore-intercrystal pore phase and clay contamination filling intercrystal pore-emposieu phase take the second place. Distribution of diagenetic facies is controlled by deposition microfacies and detrital component.关键词
成岩相/成岩作用/山23段砂岩/子洲气田/鄂尔多斯盆地Key words
diagenetic facies/ diagenesis/ Shan3 2 sandstone/ Zizhou gas field/ Ordos basin分类
能源科技引用本文复制引用
高辉,李天太,解永刚,徐自强..三角洲前缘亚相致密砂岩储层的成岩作用与有利成岩相带:以鄂尔多斯盆地子洲气田山23段砂岩为例[J].现代地质,2013,27(2):373-381,388,10.基金项目
国家自然科学基金项目(41102081) （41102081）
教育部科学技术研究重点项目(212172) （212172）
陕西省自然科学基础研究计划(2012JQ5003):国家科技重大专项项目(2011ZX05013-005). （2012JQ5003）
