川西南部地区中三叠统雷口坡组四段沉积及储层特征研究

发布时间：2018-06-04 20:53

本文选题：川西南部 + 雷四段　；参考：《西南石油大学》2015年硕士论文

【摘要】：本论文以川西南部地区雷口坡组四段为研究对象,以沉积岩石学、储层地质学等相关理论为指导,在大量相关文献资料调研的基础之上,结合钻井岩心、镜下薄片、录井资料以及各种分析化验资料,对研究区雷口坡组四段地层展布、沉积相和成岩作用的类型及特征、储层特征进行了较为深入的研究,并探讨了储层发育影响因素,找出有利勘探区域。研究表明,川西南部地区雷口坡组四段可以划分为雷四3、雷四2、雷四1三个亚段,川西南部地区雷口坡组四段分布总体稳定,受龙门山构造带、康滇古陆及泸州—开江古隆起构造抬升、地层沉积和差异剥蚀影响,研究区中部新津-彭县-中江-成都-眉山等中心部位沉积最厚,向西北、西南、东南呈环带状逐渐减薄；区内南部雷四2亚段、北部雷四3亚段多被剥蚀。研究区雷口坡组四段属陆表海台地沉积,可细分为局限台地、开阔台地、台内点滩等亚相及云坪、灰云坪、灰坪、膏盐湖等十余个微相。其中雷四3亚段台内点滩为最有利于储层发育的相带,次为局限台地云坪微相。川西南部地区雷四段储集性最好储集岩为粉晶白云岩,次为颗粒白云岩。主要储集空间以粒间溶孔为主,主要渗流空间为裂缝,储层主要分布在邛崃-桑园场-灌口场-雾中山一带,垂向上由3-7套储层组成,累计厚度约10～80m,横向连续性好。综合含油气综合研究成果认为川西南部地区龙门山前高家场-雾中山、彭州-大邑等地区为雷四段最为有利的勘探区带。
[Abstract]:In this paper, the fourth member of the Lekoupo formation in the southern part of Sichuan is taken as the research object, the relevant theories such as sedimentary petrology and reservoir geology are taken as the guidance, on the basis of a large number of related literature and data, the drilling core is combined with the thin slice under the mirror. The mud logging data and various analytical and laboratory data are used to study the distribution of strata, the types and characteristics of sedimentary facies and diagenesis, the reservoir characteristics, and the influencing factors of reservoir development in the fourth member of the Leikoupo formation in the study area. Identify favorable exploration areas. The study shows that the fourth member of the Lekoupo formation in the southern part of Sichuan can be divided into three subsections: Lei 43, Lei 42 and Lei 41. The distribution of the fourth member of the Laikoupo formation in the southern part of Sichuan is stable, and is subject to the Longmenshan structural belt. The tectonic uplift, stratigraphic deposition and differential denudation of the ancient uplift and Luzhou-Kaijiang uplift in KangDian ancient land and Luzhou-Kaijiang are the thickest in the central part of the study area, such as Xinjin-Pengxian-Zhongjiang-Chengdu-Meishan, and gradually thinned in the northwest, southwest and southeast of the study area. In the southern part of the area, submember 2 of Lei 4 and submember 3 in the north of the area were mostly denuded. The fourth member of the Leikoupo formation belongs to the continental surface platform and can be subdivided into limited platform, open platform, inner platform and more than ten microfacies, such as Yunping, Limiping, gypsum salt lake and so on. The beach in the platform is the most favorable facies zone for reservoir development, followed by the limited platform Yunping microfacies. The best reservoir rock in the southern part of West Sichuan is powdery dolomite, followed by granular dolomite. The main reservoir space is mainly intergranular solution pore, the main seepage space is fracture, the reservoir is mainly distributed in Qionglai-Sangyuanchang-Irrigation field-Foshan area, and the vertical reservoir consists of 3-7 sets of reservoirs, the accumulative thickness is about 10 ~ 80 m, and the transverse continuity is good. The comprehensive research results show that Gaojiachang-Foshan and Pengzhou-Dayi are the most favorable exploration zones in the south of Sichuan.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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