盘关向斜龙潭组沉积特征与页岩气勘探潜力研究
发布时间：2018-08-31 08:50
【摘要】：本论文对盘关向斜龙潭组的沉积相及其平面分布、暗色泥岩的有机质富集特征、有机碳含量、有机质类型、有机质成熟度等控制页岩气潜力的主要因素在野外露头和室内有机地化鉴定两方面进行研究,用页岩气关键因素参数评价的方法,对有利区进行定性评价和预测。盘关向斜地区龙潭组沉积相,主要是泻湖-潮坪沉积相和三角洲沉积相,其中泻湖-潮坪沉积相又发育泻湖微相和潮坪微相,三角洲沉积相发育有三角洲前缘亚相和三角洲平原亚相。龙潭组早期,属于脉动式海进时期,研究区大部发育泻湖-潮坪沉积相,只在研究区西南角和东北角发育有三角洲沉积相,龙潭组中期和龙潭组晚期,属于脉动式海退期,三角洲沉积相呈指状向研究区中部发育。盘关向斜地区所测两剖面—盘县西冲镇背武甲村龙潭组剖面和盘县盘江镇小寨村剖面位于盘县小寨村中暗色泥岩总厚度达到44.2m和89.8m,且暗色TOC处于2.22%-12.54%之间;镜质组反射率(Ro)的最小值是0.86%,最大值是2.65%,平均值是1.62%;有机质类型属于Ⅱ2-Ⅲ型。根据野外观察测量和有机地化分析,可得出临近盘县的背武甲村-小寨村区域为页岩气有利区域,有形成一定规模页岩气藏的潜力。目前,虽然盘关向斜地区煤炭资源的勘探开发已经很成熟,但是页岩气的勘探开发工作却进行的比较少,此文对盘关向斜地区龙潭组沉积相和页岩气勘探潜力的研究能为盘关向斜地区龙潭组页岩气的勘探开发提供一定的参考依据。
[Abstract]:In this paper, the sedimentary facies and plane distribution of Longtan formation in Panguan syncline, the enrichment characteristics of organic matter, the content of organic carbon, the type of organic matter in dark mudstone are discussed. The main factors controlling shale gas potential, such as the maturity of organic matter, are studied in field outcrop and indoor organic geochemical identification. The qualitative evaluation and prediction of the favorable area are carried out by using the method of evaluating the parameters of the key factors of shale gas. The sedimentary facies of Longtan formation in Panguan syncline area are mainly lagoon tidal flat sedimentary facies and delta sedimentary facies among which lagoon tidal flat sedimentary facies and lagoon microfacies and tidal flat microfacies are developed. There are delta front subfacies and delta plain subfacies developed in delta sedimentary facies. In the early stage of Longtan formation, which belongs to the period of pulsating sea advance, most of the study area developed lagoon tidal flat sedimentary facies, only delta sedimentary facies developed in the southwest and northeast corner of the study area. The middle and late Longtan formation belongs to the pulsating regressive stage. The delta sedimentary facies developed in the middle of the study area. The two profiles measured in Panguan syncline-Longtan formation section of Beiwujia village in Xichong town, Panxian County, and Xiaozhaicun section of Panxian Panjiang Town are 44.2 m and 89.8m thick in the middle of Xiaozhai village, Panxian County, and the dark TOC is between 2.22- 12.54%. The minimum value of vitrinite reflectance (Ro) is 0.86, the maximum value is 2.65, the average value is 1.62.The organic matter type belongs to type 鈪，
本文编号：2214496
[Abstract]:In this paper, the sedimentary facies and plane distribution of Longtan formation in Panguan syncline, the enrichment characteristics of organic matter, the content of organic carbon, the type of organic matter in dark mudstone are discussed. The main factors controlling shale gas potential, such as the maturity of organic matter, are studied in field outcrop and indoor organic geochemical identification. The qualitative evaluation and prediction of the favorable area are carried out by using the method of evaluating the parameters of the key factors of shale gas. The sedimentary facies of Longtan formation in Panguan syncline area are mainly lagoon tidal flat sedimentary facies and delta sedimentary facies among which lagoon tidal flat sedimentary facies and lagoon microfacies and tidal flat microfacies are developed. There are delta front subfacies and delta plain subfacies developed in delta sedimentary facies. In the early stage of Longtan formation, which belongs to the period of pulsating sea advance, most of the study area developed lagoon tidal flat sedimentary facies, only delta sedimentary facies developed in the southwest and northeast corner of the study area. The middle and late Longtan formation belongs to the pulsating regressive stage. The delta sedimentary facies developed in the middle of the study area. The two profiles measured in Panguan syncline-Longtan formation section of Beiwujia village in Xichong town, Panxian County, and Xiaozhaicun section of Panxian Panjiang Town are 44.2 m and 89.8m thick in the middle of Xiaozhai village, Panxian County, and the dark TOC is between 2.22- 12.54%. The minimum value of vitrinite reflectance (Ro) is 0.86, the maximum value is 2.65, the average value is 1.62.The organic matter type belongs to type 鈪，
本文编号：2214496
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