川中中台山地区侏罗系自流井组大安寨段致密油储层孔隙结构特征

发布时间：2018-02-01 02:29

本文关键词： 川中地区致密储层孔隙结构黏土矿物含量脆性矿物含量　出处：《科学技术与工程》2017年05期 　论文类型：期刊论文

【摘要】：致密储层岩石孔隙结构对致密储层中油气的储集能力和渗流机理有着重要影响。为了更好的对研究工区内甜点进行有效的识别,进一步指导后续的致密油开采,笔者运用氩离子抛光扫描电镜技术、低温氮气吸附脱附法和高压压汞实验对川中中台山地区侏罗系大安寨段致密油储层的微观孔隙结构进行了详细的研究。研究结果表明:1川中地区侏罗系大安寨段致密储层孔径范围主要集中在微米-纳米级,孔隙类型可分为有机质孔、无机孔、裂缝,其中有机质孔对储层的贡献最大;2有机质孔内TOC的含量与有机质孔的数量,两者之间呈现较好的正相关;3致密储层微观孔隙结构类型复杂多样,孔径主要分布在3~30 nm,以中孔为主、大孔和微孔不发育;4黏土矿物含量、脆性矿物含量、有机碳含量、有机质热演化程度、成岩作用、保存条件共同影响着致密储层的孔隙结构。在上述研究的基础,分析了川中地区致密储层孔隙结果的影响因素,为后续的致密油甜点识别提供了地质依据。
[Abstract]:The pore structure of tight reservoir has an important influence on the reservoir capacity and percolation mechanism. In order to better identify the desserts in the study area and further guide the subsequent tight oil production. The authors used argon ion polishing scanning electron microscopy (SEM) technique. The micropore structure of dense oil reservoir of Jurassic Da'anzhai section in Taishan area of Jurassic system was studied in detail by low temperature nitrogen adsorption desorption method and high pressure mercury injection experiment. The results show that:. 1. The pore size range of the dense reservoir in the Jurassic Dan'anzhai formation in the central Sichuan area is mainly in the micron-nanometer scale. The pore types can be divided into organic pore, inorganic pore and fracture. (2) there was a good positive correlation between the content of TOC in organic pore and the number of organic pore; (3) the micropore structure of tight reservoir is complex and diverse, the pore size is mainly distributed in 3nm, the main pore is mesoporous, and the macropore and micropore are not developed; (4) Clay mineral content, brittle mineral content, organic carbon content, thermal evolution degree of organic matter, diagenesis and preservation condition all affect the pore structure of tight reservoir. The influencing factors of pore results of dense reservoirs in central Sichuan are analyzed, which provides geological basis for the subsequent identification of dense oil desserts.
【作者单位】：西南石油大学地球科学与技术学院;
【分类号】：TE31
【正文快照】： 引用格式:周广照,刘红岐.川中中台山地区侏罗系自流井组大安寨段致密油储层孔隙结构特征[J].科学技术与工程,2017,17(5):89—97Zhou Guangzhao,Liu Hongqi.Pore structure characteristics of tight oilreservoir in the Da'anzhai member of the jurassic ziliujing formatio

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