| 三角洲前缘厚层砂岩孔隙结构及微观渗流特征——以吴仓堡地区长6储层为例 |
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| 引用本文： | 张振红,朱 静,余 芳,李 成,汪伶俐,李文厚.三角洲前缘厚层砂岩孔隙结构及微观渗流特征——以吴仓堡地区长6储层为例[J].地质通报,2016,35(203):440-447. |
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| 作者姓名： | 张振红 朱 静 余 芳 李 成 汪伶俐 李文厚 |
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| 作者单位： | 1.低渗透油气田勘探开发国家工程实验室，陕西 西安 710018；
2.中国石油长庆油田分公司勘探开发研究院，陕西 西安 710018；
3.西北大学地质学系，陕西 西安 710069 |
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| 基金项目： | 中国石油天然气股份公司重大科技专项（编号：2011E-2602） |
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| 摘 要： | 依据薄片、压汞、扫描电镜、物性分析及油水驱替实验资料，对吴仓堡地区三角洲前缘亚相长6厚层砂岩储层的岩石学特征、孔渗特征、孔隙结构特征、成岩作用、微观渗流特征等进行深入研究，分析影响储层储集性能的主控因素。结果表明，受东北物源控制的长6厚层砂岩储层具有成分成熟度中等、结构成熟度较好的特点，储集空间主要为残余粒间孔和粒间溶孔、粒内溶孔，为典型中低孔、特低渗储集层；储层储集性能主要受沉积微相和成岩作用控制。对储层发育影响最大的成岩期位于中成岩A期，中等压实－粘土膜胶结残余粒间孔发育成岩相和弱压实-残余粒间孔+溶蚀孔隙发育成岩相是最有利储层发育的成岩相带。根据微观渗流特征，可划分出4种驱油类型，微观孔隙结构比宏观物性更能反映储层的本质特征。
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| 关 键 词： | 吴仓堡地区 孔隙结构 成岩作用 油水驱替模型 微观渗流特征 |
Reservoir characteristics of thick sandstone and micro-anisotropy of delta front micro-facies: A case study of Chang 6 reservoir in Wucangbu area |
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| ZHANG Zhenhong,ZHU Jing,YU Fang,LI Cheng,WANG Lingli,LI Wenhou.Reservoir characteristics of thick sandstone and micro-anisotropy of delta front micro-facies: A case study of Chang 6 reservoir in Wucangbu area[J].Geologcal Bulletin OF China,2016,35(203):440-447. |
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| Authors: | ZHANG Zhenhong ZHU Jing YU Fang LI Cheng WANG Lingli LI Wenhou |
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| Institution: | 1. National Engineering Laboratory of Exploration and Development of Low-Permeability Oil-Gas fields, Xi'an 710018, Shaanxi, China;
2. Institute of Petroleum Exploration and Development, Changqing Oilfield Branch Company, Xi'an 710018, Shaanxi, China;
3. Department of Geology, Northwest University, Xi'an 710069, Shaanxi, China |
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| Abstract: | Based on data obtained from cast slice, mercury injection test, SEM, physical properties, and oil/water micro-displacement experiment, the authors made a thorough study of the petrological characteristics, porosity and permeability characteristics, pore structure characteristics, diagenesis and micro-anisotropy of Chang 6 reservoir in Wucangbu area, and analyzed the main influencing factors. The results show that the sedimentary environment of the Chang 6 thick sandstones reservoir is a delta front derived from the provenance in the northeast. In addition, the reservoir is characterized by medium compositional maturity and high textual maturity. The reservoir space includes residual intergranular pores, intergranular emposieu and intragranular emposieu. The sedimentary micro-facies and diagenesis constitute the main factors controlling the reservoir properties. The diagenetic period affecting reservoir development is stage A of middle diagenesis. The middle compaction, clay film cementation, residual intergranular pore diagenesis facies with weaker compaction and the secondary dissolution pore diagenesis facies are favorable diagenetic facies belts for reservoir development. Four oil displacement types are distinguished by studying reservoir microscopic heterogeneity, and the microscopic pore structures can more really reflect the reservoir's essential characteristics than the macroscopically physical properties. |
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| Keywords: | Wucangbu area pore structure diagenesis oil/water micro-displacement model micro-flow characteristics |
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