| 渤海湾盆地东营凹陷深层砂砾岩储层成岩演化特征 |
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| 引用本文： | 李军亮. 渤海湾盆地东营凹陷深层砂砾岩储层成岩演化特征[J]. 石油实验地质, 2008, 30(3): 252-255. doi: 10.11781/sysydz200803252 |
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| 作者姓名： | 李军亮 |
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| 作者单位： | 中国石油化工股份有限公司, 胜利油田分公司, 地质科学研究院, 山东, 东营, 257015 |
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| 摘 要： | 渤海湾盆地东营凹陷深层砂砾岩扇体成岩演化复杂,影响因素多,油气储层预测难度大。以岩石镜下微观特征观察为基础,通过深入剖析内因与外因对深层砂砾岩储层成岩演化的影响,认为沉积相带、欠压实、盐膏刺穿、酸性流体溶蚀、烃类流体早期充注、构造活动、绿泥石膜等是影响储集性能的有利因素,而正常压实、碳酸盐与硫酸盐胶结、粘土矿物含量高、高矿化度地层水结晶、溶态盐扩散等是影响储集性能的不利因素。扇中相带、欠压实、烃类早期充注、绿泥石膜等有利于原生孔隙的保存,盐膏刺穿、构造活动等有利于裂缝的发育,酸性流体对碳酸盐和长石矿物的溶蚀是次生孔隙大量发育的主要原因,三者构成的立体连通孔—缝网络有效提升了深层砂砾岩储层的孔渗性能。
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| 关 键 词： | 深层砂砾岩 储层 成岩作用 演化特征 东营凹陷 渤海湾盆地 |
| 收稿时间： | 2007-12-12 |
| 修稿时间： | 2008-04-24 |
DIAGENESIS EVOLUTION CHARACTERISTICS OF DEEP BURIED GLUTENITE RESERVOIR BED IN THE DONGYING SAG, THE BOHAI BAY BASIN |
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| Li Junliang. DIAGENESIS EVOLUTION CHARACTERISTICS OF DEEP BURIED GLUTENITE RESERVOIR BED IN THE DONGYING SAG, THE BOHAI BAY BASIN[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2008, 30(3): 252-255. doi: 10.11781/sysydz200803252 |
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| Authors: | Li Junliang |
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| Affiliation: | Research Institute of Geological Sciences, Shengli Oil Field, SINOPEC, Dongying, Shandong 257015, China |
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| Abstract: | Diagenesis evolution of deep buried glutenite fans in the Dongying Sag of the Bohai Bay Basin is complicated with multiple influential factors.Reservoir beds are difficult to forecast.Based on microscopic observation of rock thin-sections,intrinsic and extrinsic factors controlling diagenesis evolution are dissected.It has been concluded that,on one hand,there are some advantageous factors influencing reservoir property including sedimentary facies,undercompaction,halite-gypsum pier cement,acidic fluid solution,early stage hydrocarbon infilling,tectonic movement and chlorite film.On the other hand,there are also some disadvantageous factors such as compaction,cementing of carbonate and sulfate,high content of clay minerals,crystallization of high salinity of formation water,and diffuse of dissolved salts.Firstly,middle fan facies,undercompaction,early stage hydrocarbon infilling and chlorite film are favorable for preservation of primary pore space.Secondly,halite-gypsum pier cement and tectonic movement are favorable for fracture development.Thirdly,solution of carbonate rock and feldspar by acidic fluid is the main factor controlling secondary porosity development.All the three elements constitute three-dimensional connected pore-fracture network which is effective to enhance reservoir property in deep buried glutenite. |
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| Keywords: | deep buried glutenite reservoir bed diagenesis evolution characteristics the Dongying Sag the Bohai Bay Basin |
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