本文選題：萍樂坳陷　切入點：小江邊組　出處：《成都理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：在利用前人研究成果的基礎上,結合野外露頭、區(qū)調資料,對研究區(qū)的區(qū)域構造進行總結和分析,然后利用沉積巖石學、巖相古地理學等理論研究了萍樂坳陷中二疊統(tǒng)小江邊組的沉積相類型和巖相古地理特征,結合烴源巖的平面特征和有機地化特征,進行油氣遠景分析。萍樂坳陷中二疊統(tǒng)小江邊組為一套灰黑色鈣質頁巖及碳質頁巖夾灰?guī)r透鏡體沉積,中二疊世晚期,海平面快速上升,海水加深明顯,研究區(qū)內主要發(fā)育混積陸棚相,進一步可以分為淺水內陸棚和深水外陸棚亞相以及陸棚泥和灰泥丘微相。研究區(qū)內小江邊組的烴源巖以暗色泥頁巖為主,其分布在平面上具有相當規(guī)模的展布,占地層比例的變化范圍為64.72%-81.77%。有機地球化學的實驗表明,研究區(qū)小江邊組的有機碳含量普遍達到烴源巖下限,部分達到中等烴源巖標準,多數(shù)達到好的烴源巖標準,有機質類型以生氣Ⅲ型為主,次為生油Ⅱ型。對烴源巖的熱演化程度的研究顯示,研究區(qū)內小江邊組烴源巖的成熟度主要處于高成熟晚期階段,部分達到過成熟階段。研究區(qū)小江邊組地層的生烴坳陷主要為西南部的萍鄉(xiāng)、宜春、萬載一帶的深水外陸棚沉積,該區(qū)域的有機質豐度和有機質成熟度都較為理想,是良好的烴源巖潛力區(qū)。此外,萍樂坳陷中二疊統(tǒng)小江邊組的非常規(guī)油氣,特別是頁巖氣的資源潛力較好,有利區(qū)主要集中在清江盆地、錦江盆地和南鄱陽坳陷,這些地區(qū)同樣也是重要的油氣遠景區(qū)。
[Abstract]:On the basis of previous research results, combined with field outcrop and regional data, the regional structure of the study area is summarized and analyzed, and then sedimentary petrology is used. The sedimentary facies types and lithofacies paleogeographic characteristics of the Xiaojiangbian formation of the Middle Permian in Pingle Depression are studied in the theory of lithofacies and paleogeography, combining with the plane and organic geochemistry characteristics of the source rocks. The Middle Permian Xiaojiang Bian formation in Pingle depression is a set of gray-black calcareous shale and carbonaceous shale intercalated limestone lens deposits. In the late Middle Permian, sea level rises rapidly and the sea water deepens obviously. There are mainly mixed continental shelf facies in the study area, which can be further divided into shallow water inland shelf and deep water outer shelf subfacies, shelf mud and plaster hilly facies. The hydrocarbon source rocks of Xiaojiang Bian formation in the study area are mainly dark mud shale. The distribution of organic carbon in the small Jiangbian formation in the study area is generally up to the lower limit of the source rock, and some of the organic carbon content of the Xiaojiangbian formation reaches the standard of the medium source rock, and the variation range of the proportion of the area covers a range of 64.72 and 81.77. Most of them meet the standard of hydrocarbon source rock, the organic matter type is mainly type 鈪，

本文編號：1628924