| 鄂尔多斯盆地华庆地区长6油层组砂岩成岩相及储层质量评价 |
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| 引用本文： | 兰叶芳,邓秀芹,程党性,黄锦绣.鄂尔多斯盆地华庆地区长6油层组砂岩成岩相及储层质量评价[J].岩石矿物学杂志,2014,33(1):51-63. |
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| 作者姓名： | 兰叶芳 邓秀芹 程党性 黄锦绣 |
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| 作者单位： | 油气藏地质及开发工程国家重点实验室 成都理工大学, 四川 成都 610059;成都理工大学 沉积地质研究院, 四川 成都 610059;中国石油长庆油田分公司勘探开发研究院, 陕西 西安 710018;低渗透油气田勘探 开发国家工程实验室, 陕西 西安 710018;中国石油长庆油田分公司勘探开发研究院, 陕西 西安 710018;低渗透油气田勘探 开发国家工程实验室, 陕西 西安 710018;中国石油长庆油田分公司勘探开发研究院, 陕西 西安 710018;低渗透油气田勘探 开发国家工程实验室, 陕西 西安 710018 |
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| 基金项目： | 国家科技重大专项（2011ZX05001-004） |
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| 摘 要： | 本文借助于薄片分析、扫描电镜分析、阴极发光分析和物性分析等研究手段，以鄂尔多斯盆地华庆地区长6油层组低渗透砂岩的形成机制为解剖对象，通过对砂岩埋藏前组成、化学成岩作用和物理成岩作用的相对重要性、自生矿物组成、孔隙构成、物性与孔隙结构等研究，明确了主要成岩作用对储层的影响。在此基础上，结合沉积相的研究，选择骨架颗粒构成、自生矿物组成、物性、孔隙构成以及粒间体积等有关的15个成岩相定量评价参数，对华庆地区长6油层组低渗透砂岩进行成岩相的定量评价。结果表明：① 华庆地区长6油层组砂岩经历了较强的物理成岩作用和较弱的化学成岩作用，原生孔隙是主要储集空间，压实作用是孔隙度降低的最主要因素，其次为方解石的胶结作用；② 成岩相定量评价表明，弱胶结、强压实成岩相以及强方解石胶结、中-强压实成岩相的储层质量均较差，受北部物源区控制的绿泥石胶结、弱-中等压实成岩相具有较好的储层质量，建议作为今后的优选勘探开发区。
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| 关 键 词： | 鄂尔多斯盆地 长6油层组 成岩作用 成岩相 储层质量评价 |
| 收稿时间： | 2013/5/8 0:00:00 |
| 修稿时间： | 2013/12/7 0:00:00 |
Diagenetic facies and reservoir quality evaluation of Chang 6 sandstone reservoir in the upper Triassic Yanchang Formation of Huaqing area, Ordos Basin |
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| LAN Ye-fang,DENG Xiu-qin,CHENG Dang-xing and HUANG Jin-xiu.Diagenetic facies and reservoir quality evaluation of Chang 6 sandstone reservoir in the upper Triassic Yanchang Formation of Huaqing area, Ordos Basin[J].Acta Petrologica Et Mineralogica,2014,33(1):51-63. |
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| Authors: | LAN Ye-fang DENG Xiu-qin CHENG Dang-xing and HUANG Jin-xiu |
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| Institution: | State Key Laboratory of Oil/Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China;Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China;Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi''an 710018, China;National Engineering Laboratory for Exploration and Development of Low-permeability Oil &Gas Fields, Xi''an 710018, China;Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi''an 710018, China;National Engineering Laboratory for Exploration and Development of Low-permeability Oil &Gas Fields, Xi''an 710018, China;Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi''an 710018, China;National Engineering Laboratory for Exploration and Development of Low-permeability Oil &Gas Fields, Xi''an 710018, China |
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| Abstract: | Based on thin section analysis, scanning electron microscopy analysis, cathodoluminescence analysis and physical property analysis, the authors studied the sandstone composition, the relative importance of chemical diagenesis and physical diagenesis, authigenic minerals, pores and physical properties to reveal the formation mechanism of Chang 6 sandstone reservoir with low-permeability in the upper Triassic Yanchang Formation of Huaqing area, Ordos Basin. The authors selected 15 diagenetic parameters to quantitatively evaluate and divide the diagenetic facies of Chang 6 sandstones on the basis of an integrated study of sedimentary facies and diagenetic processes. The results show that the Chang 6 sandstones have experienced strong physical diagenesis and weak chemical diagenesis, and hence the primary pores are the most important reservoir space; in addition, it is the compaction and calcite cementation that cause the porosity reduction and poor reservoir quality. The reservoir quality of sandstones affected by the northeastern provenance is significantly better than that affected by the southwestern provenance. Furthermore, the southwestern sandstones, showing weak cementation and strong compaction diagenetic facies and strong calcite cementation and moderate-strong diagenetic facies, have poor reservoir quality, whereas the northeastern sandstones, especially the middle sand bodies, which show chlorite cementation and weak-moderate compaction diagenetic facies, have good reservoir quality and are thus recommended as preferred exploration zones. |
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| Keywords: | Ordos Basin Chang 6 oil reservoir diagenesis diagenetic facies reservoir quality evaluation |
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