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| 南图尔盖盆地储层成岩作用及孔隙演化 | |
| 引用本文： | 周海燕,胡见义,郑俊章,黄先雄.南图尔盖盆地储层成岩作用及孔隙演化[J].岩石矿物学杂志,2008,27(6):547-558. |
| 作者姓名： | 周海燕 胡见义 郑俊章 黄先雄 |
| 作者单位： | 1. 中国石油勘探开发研究院,北京,100083;中国石油海外研究中心,北京,100083 2. 中国石油勘探开发研究院,北京,100083 3. 中国石油海外研究中心,北京,100083 |
| 基金项目： | 中国石油天然气集团公司资助项目 |
| 摘 要： | 储层储集性能普遍良好是南图尔盖盆地油气资源丰富的主要原因.通过对该盆地储层的岩石学特征、成岩作用及孔隙类型演化分析研究发现,砂岩的成岩作用及孔隙演化对储层的储集性能有着重要影响.在对大量薄片和岩心进行分析的基础上,运用扫描电镜和X衍射粘土分析等手段,对南图尔盖盆地砂岩储层研究结果表明,该区机械压实和压溶作用、杂基充填作用、胶结作用和交代作用使砂岩孔隙度降低,不稳定矿物的溶蚀作用导致储层次生孔隙发育.根据有机质的演化及粘土矿物的变化序列,成岩作用和孔隙演化随埋深具有明显的阶段性:早成岩阶段,孔隙类型以原生孔隙粒间孔为主;中成岩阶段,孔隙类型以原生、次生混合型为主;晚成岩阶段,孔隙类型以次生型为主.综合评价南图尔盖盆地储层发现,阿雷斯库姆组、阿克萨布拉克组和库姆科尔组为Ⅰ类储层,可作为今后油气勘探的主要目的层. |
| 关 键 词： | 成岩作用 次生孔隙 粘土矿物 库姆科尔组 孔隙演化 南图尔盖盆地 |
Diagenesis and pore evolution of reservoirs in South Turgai Basin |
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| ZHOU Hai-yan,HU Jian-yi,ZHENG Jun-zhang and HUANG Xian-xiong.Diagenesis and pore evolution of reservoirs in South Turgai Basin[J].Acta Petrologica Et Mineralogica,2008,27(6):547-558. | |
| Authors: | ZHOU Hai-yan HU Jian-yi ZHENG Jun-zhang and HUANG Xian-xiong |
| Institution: | Research Institute of Petroleum Exploration & Development, Beijing 100083, China; CNPC International Research Center, Beijing 100083, China;Research Institute of Petroleum Exploration & Development, Beijing 100083, China;Research Institute of Petroleum Exploration & Development, Beijing 100083, China; CNPC International Research Center, Beijing 100083, China;CNPC International Research Center, Beijing 100083, China |
| Abstract: | The main factor responsible for rich hydrocarbon resources is the good behaviors of reservoirs in South Turgai Basin. An analysis of characteristics, diagenesis and pore type evolution of reservoir rocks shows that diagenesis and pore evolution exerted great effects on the properties of reservoir rocks. Lots of thin sections were analyzed by such means as standard petrographic microscope, X-ray diffraction and scanning electron microscope analysis so as to study the selected samples. Diagenetic complexity suggests that mechanical compaction and pressure solution, miscellaneous filling actions, cementation and replacement led to the decrease of porosity, whereas solution of unsteady minerals resulted in the increase of porosity. The evolution of organic materials and the sequence of clay minerals imply that diagenesis and pore evolution of the sandstone varied obviously with the increasing buried depth: the porosity type was mainly interparticle pores of the primary pore type at the early diagenetic stage, mainly the mixing of the primary and secondary pores at the middle diagenetic stage, and mainly the secondary pores at the late diagenetic stage. A comprehensive evaluation of the reservoirs in South Turgai Basin has led the authors to the conclusion that the Aryskum Formation, the Akshabulak Formation and the Kumkol Formation belong to Class I Reservoir, which may be regarded as the main targets in future prospecting work. |
| Keywords: | diagenesis secondary pore clay mineral Kumkol Formation pore evolution South Turgai Basin |
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