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| 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_2~3段砂岩为例 | |
| 引用本文： | 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_2~3段砂岩为例[J].现代地质,2013,27(2). |
| 作者姓名： | 高辉 李天太 解永刚 徐自强 |
| 作者单位： | 1. 西安石油大学石油工程学院,陕西西安,710065 2. 长庆油田分公司第二采气厂,陕西榆林,719000 3. 长庆油田分公司油气工艺研究院,陕西西安,710021 |
| 基金项目： | 国家自然科学基金项目，教育部科学技术研究重点项目，陕西省自然科学基础研究计划(2012JQ5003):国家科技重大专项项目 |
| 摘 要： | 致密砂岩储层成岩作用复杂,成岩相分布表现出明显的差异性。以物性、铸体薄片、扫描电镜、X衍射、高压压汞等测试数据为基础,对鄂尔多斯盆地东部子洲气田山32段砂岩的成岩作用和成岩相进行了研究。结果表明:岩性以石英砂岩为主,岩屑含量自西向东表现出增加趋势;残余粒间孔、溶蚀孔和晶间孔为主要孔隙类型;压实压溶作用使原生粒间孔大量损失;胶结作用对储集空间具有双重影响,但整体使物性变差;溶解作用对石英砂岩和岩屑石英砂岩的影响不同,对石英砂岩的溶蚀程度更高;综合多项成岩阶段划分指标,子洲气田山32段砂岩已进入晚成岩B期,部分指标进入C期;参考多项定性和定量参数,划分出6种成岩相,分布于水下分流河道厚砂体中的石英加大粒间孔-溶蚀孔相是最有利的成岩相带,石英加大粒间孔-晶间孔相和粘土杂基充填晶间孔-溶蚀孔相次之,成岩相的平面分布受沉积微相和碎屑组分变化影响明显。 |
| 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 |
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 |
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| GAO Hui , LI Tian-tai , XIE Yong-gang , XU Zi-qiang.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[J].Geoscience——Journal of Graduate School,China University of Geosciences,2013,27(2). | |
| Authors: | GAO Hui LI Tian-tai XIE Yong-gang XU Zi-qiang |
| 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 Shan23 sandstone of Zizhou gas field in the eastern of Ordos 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.Shan23 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 diagenetic facies zones in the study area are classified.Weak compaction,quartz overgrowth intergranular pore-emposieu 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. |
| Keywords: | diagenetic facies diagenesis Shan23 sandstone Zizhou gas field Ordos basin |
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