| 张 茜.鄂尔多斯盆地华庆地区长63储层成藏期孔隙度定量演化及致密成因机理[J].地质与勘探,2017,53(4):807-817 |
| 鄂尔多斯盆地华庆地区长63储层成藏期孔隙度定量演化及致密成因机理 |
| Quantitative calculation of porosity evolution and formation mechanism of tight sandstone in the Chang 63 reservoirs of the Huaqing area, Ordos Basin |
| 投稿时间：2017-02-28 修订日期：2017-04-11 |
| DOI： |
| 中文关键词: 致密砂岩 成岩作用 孔隙度 定量演化 地质响应 长63储层 华庆地区 鄂尔多斯盆地 |
| 英文关键词: tight sandstone, diagenesis, porosity, quantitative evolution,Chang 63 reservior, Huaqing area,Ordos basin |
| 基金项目:国家科技重大专项大型油气田及煤层气开发(编号2011ZX05044)，陕西省科技统筹创新工程(编号2011KTZB01-04-01)和中国博士后科学基金（编号2015M582699）资助 |
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| 中文摘要: |
| 基于鄂尔多斯盆地华庆地区长63致密砂岩储层三角洲前缘及半深湖相的稳定沉积特征，按照碎屑岩成岩演化特征或地质综合效应建立与孔隙度对应的模拟方程。采用铸体薄片及扫描电镜描述岩石的矿物组分及孔隙类型；图像粒度获取碎屑颗粒的结构特征及分选性；利用沉积微相、测井、样品取样点常规物性及深度分析获取沉积环境、埋藏深度、物性；同时结合古温度、镜质组反射率、最高热解温度、粘土矿物等数据，开展成岩作用、孔隙演化、相对高渗成因的研究；结合研究区埋藏史、古地温研究，基于不同成岩作用下孔隙度演化特征分析华庆油田长63储层致密成因机理。目的层主要属于压实型成岩改造类型，差异性成岩演化过程是导致储层物性不同和孔隙结构差异的根本原因。 |
| 英文摘要: |
| Previous studies considered that Chang 63 tight sandstone formation of the Huaqing area in Ordos Basin formed in a delta front and semi-deep lake stable sedimentary setting. According to the characteristics of diagenetic evolution or the comprehensive geological effects of clastic reservoirs, we established the simulation equation corresponding to the porosity. We applied the casting thin sections and scan electron microscope to describe rock mineral components and porosity types. We used granularity images to show structural characteristics and sorting features of the clastic particles. Based on sedimentary microfacies, well logging, normal physical characteristics and depth analysis we inferred the depositional environment, buried depth and physical characteristics. Simultaneously we used the paleotemperture, vitrinite reflectance, the highest pyrolysis temperature and clay minerals to study the diagenesis, porosity evolution and relatively high permeability formation. In combination with burial history and paleo-geotherm, we studied the formation mechanism of tight sandstone reservoirs. This study suggested that the target layers are attributed to compaction and reform type in diagenesis. Differentiated diagenetic evolution is the root cause that led to different physical properties and porosity structures of the reservoirs. |
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