| 浅层致密砂岩油藏成岩作用及孔隙演化 |
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| 引用本文： | 王瑞飞,王立新,李俊鹿,唐颖,吉园园,赵佳,许红涛.浅层致密砂岩油藏成岩作用及孔隙演化[J].地球物理学进展,2020(4):1465-1470. |
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| 作者姓名： | 王瑞飞 王立新 李俊鹿 唐颖 吉园园 赵佳 许红涛 |
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| 作者单位： | 陕西省油气井及储层渗流与岩石力学重点实验室;中石化华北油气分公司 |
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| 基金项目： | 陕西省教育厅重点项目“致密砂岩储层层理缝表征方法及渗流-应力时变耦合机理”(18JS084);陕西省高校科协青年人才托举计划(20180703)联合资助。 |
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| 摘 要： | 为探讨浅层致密砂岩油藏储层成岩作用及孔隙演化问题,以鄂尔多斯盆地南部B油田延长组长3-长7油层组为研究对象,开展岩石学特征、成岩作用、孔隙演化研究.研究表明,B油田长3-长7油层组碎屑成分差异不大,长7油层组石英含量高,长6油层组长石、岩屑含量高,长3油层组云母含量高.长3油层组粒级分布相对较粗,其次为长7油层组,长6油层组粒级分布最细.从长3、长6至长7油层组,碳酸盐胶结物含量、黏土矿物总量、伊/蒙间层含量、伊利石含量逐渐增加,高岭石、绿泥石含量依次减小,成岩胶结、交代作用依次增强.成岩作用阶段为早成岩B期至中成岩A期.随油藏储层埋藏深度增加,成岩作用强度持续、不断增强.储层孔隙演化研究表明,长3、长6、长7油层组初始孔隙度接近,压实成岩作用过程中损失的孔隙度也比较接近.随油藏埋藏深度增加,成岩作用中胶结作用增强,溶蚀作用减弱.长6、长7油层组胶结作用明显强于长3油层组,长3油层组溶蚀作用明显强于长6、长7油层组.随埋深增加,绝对溶蚀作用减弱,相对溶蚀作用增强.
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| 关 键 词： | 浅层致密砂岩 成岩作用 孔隙演化 延长组 B油田 鄂尔多斯盆地 |
Diagenesis and porosity evolution of ultra-low permeability and shallow layers sandstone reservoir |
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| WANG Rui-fei,WANG Li-xin,LI Jun-lu,TANG Ying,JI Yuan-yuan,ZHAO Jia,XU Hong-tao.Diagenesis and porosity evolution of ultra-low permeability and shallow layers sandstone reservoir[J].Progress in Geophysics,2020(4):1465-1470. |
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| Authors: | WANG Rui-fei WANG Li-xin LI Jun-lu TANG Ying JI Yuan-yuan ZHAO Jia XU Hong-tao |
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| Institution: | (Shaanxi Key Laboratory of Well Stability and Fluid and Rock Mechanics in Oil and Gas Reservoirs,College of Petroleum Engineering,Xi’an Shiyou University,Shaanxi,Xi’an 710065,China;North China Company,Sinopec,Zhengzhou 450006,China) |
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| Abstract: | We studied the diagenesis and porosity evolution of ultra-low permeability and shallow layers sandstone reservoir in the Chang 3-Chang 7 reservoirs in the B Oilfield of the Erdos Basin in China.The results show that there is little difference in the clastic composition of Chang 3-Chang 7 reservoir in B Oilfield,the quartz content of Chang 7 reservoir is higher,the feldspar and lithic debris content of Chang 6 is higher,and the mica content of Chang 3 is relatively high.The distribution of grain size from coarse to fine is Chang 3 reservoir,Chang 7 reservoir and Chang 6 reservoir.From Chang 3,Chang 6 to Chang 7 reservoirs,the carbonate cementation content increases in turn,diagenetic cementation and metasomatism increase in turn,the total amount content of clay minerals increases gradually,the andreattite/montmorillonite layer increases gradually,and the andreattite content increases gradually.The content of kaolinite and chlorite decreased in turn.The diagenesis stage of reservoir is from the Phase B of early diagenetic to the Phase A of mid-diagenetic.With the increase of reservoir buried depth,the diagenesis intensity increases continuously.The study of reservoir pore evolution shows that the initial porosity of chang 3 reservoir,chang 6 reservoir and chang 7 reservoir is close,and the loss porosity during compaction of chang 3 reservoir,chang 6 reservoir and chang 7 reservoir also is close.With the increase of reservoir buried depth,the cementation increases and the dissolution weakens.The cementation of Chang 6 reservoir and Chang 7 reservoir is obviously stronger than that of Chang 3 reservoir,and the denudation of Chang 3 reservoir is obviously stronger than that of Chang 6 reservoir and Chang 7 reservoir.With the increase of reservoir buried depth,the absolute denudation decreased and the relative denudation increased. |
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| Keywords: | Ultra-low permeability and shallow layers sandstone reservoir Diagenesis Porosity evolution Yanchang Formation Weibei Oilfield Erdos Basin |
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