本文選題：萍樂(lè)坳陷　切入點(diǎn)：小江邊組　出處：《成都理工大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：在利用前人研究成果的基礎(chǔ)上,結(jié)合野外露頭、區(qū)調(diào)資料,對(duì)研究區(qū)的區(qū)域構(gòu)造進(jìn)行總結(jié)和分析,然后利用沉積巖石學(xué)、巖相古地理學(xué)等理論研究了萍樂(lè)坳陷中二疊統(tǒng)小江邊組的沉積相類(lèi)型和巖相古地理特征,結(jié)合烴源巖的平面特征和有機(jī)地化特征,進(jìn)行油氣遠(yuǎn)景分析。萍樂(lè)坳陷中二疊統(tǒng)小江邊組為一套灰黑色鈣質(zhì)頁(yè)巖及碳質(zhì)頁(yè)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(nèi)主要發(fā)育混積陸棚相,進(jìn)一步可以分為淺水內(nèi)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(nèi)小江邊組的烴源巖以暗色泥頁(yè)巖為主,其分布在平面上具有相當(dāng)規(guī)模的展布,占地層比例的變化范圍為64.72%-81.77%。有機(jī)地球化學(xué)的實(shí)驗(yàn)表明,研究區(qū)小江邊組的有機(jī)碳含量普遍達(dá)到烴源巖下限,部分達(dá)到中等烴源巖標(biāo)準(zhǔn),多數(shù)達(dá)到好的烴源巖標(biāo)準(zhǔn),有機(jī)質(zhì)類(lèi)型以生氣Ⅲ型為主,次為生油Ⅱ型。對(duì)烴源巖的熱演化程度的研究顯示,研究區(qū)內(nèi)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(dá)到過(guò)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(wàn)載一帶的深水外陸棚沉積,該區(qū)域的有機(jī)質(zhì)豐度和有機(jī)質(zhì)成熟度都較為理想,是良好的烴源巖潛力區(qū)。此外,萍樂(lè)坳陷中二疊統(tǒng)小江邊組的非常規(guī)油氣,特別是頁(yè)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(yáng)坳陷,這些地區(qū)同樣也是重要的油氣遠(yuǎn)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(hào)：1628924