【摘要】：本論文對盤關向斜龍?zhí)督M的沉積相及其平面分布、暗色泥巖的有機質富集特征、有機碳含量、有機質類型、有機質成熟度等控制頁巖氣潛力的主要因素在野外露頭和室內有機地化鑒定兩方面進行研究,用頁巖氣關鍵因素參數評價的方法,對有利區(qū)進行定性評價和預測。盤關向斜地區(qū)龍?zhí)督M沉積相,主要是瀉湖-潮坪沉積相和三角洲沉積相,其中瀉湖-潮坪沉積相又發(fā)育瀉湖微相和潮坪微相,三角洲沉積相發(fā)育有三角洲前緣亞相和三角洲平原亞相。龍?zhí)督M早期,屬于脈動式海進時期,研究區(qū)大部發(fā)育瀉湖-潮坪沉積相,只在研究區(qū)西南角和東北角發(fā)育有三角洲沉積相,龍?zhí)督M中期和龍?zhí)督M晚期,屬于脈動式海退期,三角洲沉積相呈指狀向研究區(qū)中部發(fā)育。盤關向斜地區(qū)所測兩剖面—盤縣西沖鎮(zhèn)背武甲村龍?zhí)督M剖面和盤縣盤江鎮(zhèn)小寨村剖面位于盤縣小寨村中暗色泥巖總厚度達到44.2m和89.8m,且暗色TOC處于2.22%-12.54%之間;鏡質組反射率(Ro)的最小值是0.86%,最大值是2.65%,平均值是1.62%;有機質類型屬于Ⅱ2-Ⅲ型。根據野外觀察測量和有機地化分析,可得出臨近盤縣的背武甲村-小寨村區(qū)域為頁巖氣有利區(qū)域,有形成一定規(guī)模頁巖氣藏的潛力。目前,雖然盤關向斜地區(qū)煤炭資源的勘探開發(fā)已經很成熟,但是頁巖氣的勘探開發(fā)工作卻進行的比較少,此文對盤關向斜地區(qū)龍?zhí)督M沉積相和頁巖氣勘探潛力的研究能為盤關向斜地區(qū)龍?zhí)督M頁巖氣的勘探開發(fā)提供一定的參考依據。
[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，

本文編號：2214496