| 四川盆地北部孤立台地边缘飞仙关组鲕滩储层特征及成因 |
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| 引用本文： | 周进高,郭庆新,沈安江,张建勇,郝毅,潘立银,辛勇光.四川盆地北部孤立台地边缘飞仙关组鲕滩储层特征及成因[J].海相油气地质,2012(2):57-62. |
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| 作者姓名： | 周进高 郭庆新 沈安江 张建勇 郝毅 潘立银 辛勇光 |
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| 作者单位： | 中国石油杭州地质研究院;中国石油天然气集团公司碳酸盐岩储层重点实验室 |
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| 基金项目： | 国家科技攻关项目《四川、塔里木等盆地及邻区海相碳酸盐岩大油气田形成条件、关键技术及目标评价》(编号:2008ZX0504-003)资助 |
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| 摘 要： | 对四川盆地北部孤立台地边缘下三叠统飞仙关组鲕滩储层的认识尚存诸多分歧,尤其是在储层白云石化、孔隙类型和成因方面。认为构成储层的主要岩性是残余鲕粒泥晶白云岩、残余鲕粒粉晶白云岩和细晶白云岩,储集空间以粒间孔和鲕模孔为主。沉积微相、鲕粒矿物成分和早期淡水溶蚀作用是储层形成的主控因素,其中相控是基础,是粒间孔发育的关键,鲕粒矿物成分和早期大气淡水溶蚀是鲕模孔形成的决定因素。回流渗透白云石化作用是白云岩形成的关键,其主要贡献在于增加了岩石强度,抑制压溶和胶结作用,使早期孔隙得以保存。埋藏溶蚀作用有两期,分别与有机酸和TSR产物有关,但埋藏溶蚀只是对原有储集空间的有益改造。
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| 关 键 词： | 四川盆地北部 飞仙关组 白云岩储层 储层特征 储层成因 白云石化作用 |
Characteristics and Genesis of Lower Triassic Feixianguan Oolitic Beach Reservoir in Isolated Platform,Northern Sichuan Basin |
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| Zhou Jingao,Guo Qingxin,Shen Anjiang, Zhang Jianyong,Hao Yi,Pan Liyin,Xin Yongguang.Characteristics and Genesis of Lower Triassic Feixianguan Oolitic Beach Reservoir in Isolated Platform,Northern Sichuan Basin[J].Marine Origin Petroleum Geology,2012(2):57-62. |
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| Authors: | Zhou Jingao Guo Qingxin Shen Anjiang Zhang Jianyong Hao Yi Pan Liyin Xin Yongguang |
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| Institution: | PetroChina Hangzhou Institute of Geology,920 Xixi Rd.,Hangzhou,Zhejiang,310023,China |
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| Abstract: | Numerous research documents have shown divergent viewpoints on the Lower Triassic Feixianguan oolitic beach reservoir,especially on dolomitization,pore types and pore genesis,in the isolated platform in northern Sichuan Basin.Based on data from outcrops,drilling cores,and reservoir characteristics,it is indicated that the reservoir mainly consists of remnant oolitic micritic crystalline dolostone and fine crystalline dolostone.Intergranular pores and oomoldic pores are common types of reservoir space.The controlling factors of reservoir genesis are sedimentary microfacies,mineral component of ooids and early meteoric leaching.The microfacies is the basic for development of intergranular pores;the mineral composition of ooids and the meteoric leaching are the crucial for forming oolimoldic spaces.Seepage reflux dolomitization plays an important role in preserving early pores.It contributes increasing rock strength and repressing pressolution and cementation but buried dolomitization plays a part reaction on filling pore space,which is limited.Two stages of buried dissolution can be recognized.The first stage happened after seepage reflux dolomitization,which is correlated with dissolution by organic acid,and the second happened in deep buried environment,which maybe is correlated with TSR.Buried dissolution just only improves reconstruction of original reservoir space. |
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| Keywords: | Lower Triassic Feixianguan Formation Dolostone reservoir Reservoir characteristics Reservoir genesis Dolomitization Sichuan Basin |
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