本文選題：萍樂坳陷 + 樂平組　； 參考：《成都理工大學(xué)》2017年碩士論文

【摘要】：本文以萍樂坳陷樂平組富有機(jī)質(zhì)頁巖為研究對(duì)象,選取野外典型露頭剖面進(jìn)行測(cè)量、描述、取樣,并通過薄片鑒定分析、X-射線衍射全巖分析,以及總有機(jī)碳含量、熱解、氯仿瀝青“A”、干酪根碳同位素、鏡質(zhì)體反射率等有機(jī)地球化學(xué)分析,結(jié)合對(duì)前人相關(guān)地質(zhì)資料的收集分析,系統(tǒng)研究了樂平組富有機(jī)質(zhì)頁巖的巖石類型、展布發(fā)育特征、沉積相、烴源巖特征、儲(chǔ)層特征等頁巖氣資源條件。研究區(qū)樂平期受周期性海水作用,沉積了砂巖、炭質(zhì)泥頁巖、粉砂質(zhì)泥巖、泥巖等,泥頁巖主要分布于豐城地區(qū)及樂平地區(qū),個(gè)別地區(qū)古植物發(fā)育形成含煤沼澤沉積,可見交錯(cuò)層理及泥質(zhì)透鏡狀層理,總體為一套潮坪相含煤碎屑巖沉積。通過有機(jī)地球化學(xué)測(cè)試分析表明,研究區(qū)內(nèi)樂平組富有機(jī)質(zhì)頁巖有機(jī)質(zhì)含量總體較高,屬于較好的烴源巖,萍鄉(xiāng)一帶有機(jī)質(zhì)含量最高。有機(jī)顯微組分及干酪根碳同位素分析表明,樂平組有機(jī)質(zhì)母質(zhì)為以陸生高等植物為主的腐殖型烴源巖,有機(jī)質(zhì)類型以Ⅲ型為主,次為Ⅱ型。有機(jī)質(zhì)成熟度測(cè)試分析表明,鏡質(zhì)體反射率較高,大部分樣品達(dá)到高成熟階段,部分為過成熟階段,屬產(chǎn)干氣階段。富有機(jī)質(zhì)頁巖以粘土礦物、石英為主,可見少量長(zhǎng)石和方解石,高含量的脆性礦物顯示泥頁巖具有較好的脆性。富有機(jī)質(zhì)頁巖物性顯示分析,頁巖主要發(fā)育有機(jī)質(zhì)孔、粒間孔和溶蝕孔,平均孔隙度和滲透率均較低。綜合研究巖石學(xué)特征、沉積相、有機(jī)地球化學(xué)特征、物性特征及含氣性分析后,認(rèn)為研究區(qū)樂平組頁巖氣成藏屬于潮坪相有機(jī)質(zhì)高演化較低豐度富集模式,并優(yōu)選樂平地區(qū)、萍鄉(xiāng)-宜春地區(qū)為有利區(qū)。
[Abstract]:In this paper, the organic shale of Leping formation in Pingle depression is taken as the research object. The typical outcrop profile in the field is selected for measurement, description, sampling, and the whole rock analysis by X ray diffraction, total organic carbon content and pyrolysis are analyzed by thin slice identification. The organic geochemical analysis of chloroform bitumen "A", kerogen carbon isotope, vitrinite reflectance and other organic geochemistry analysis, combined with the collection and analysis of previous relevant geological data, systematically studied the rock types, distribution and development characteristics of organic shale rich in organic matter in the Leping formation. Sedimentary facies, source rock characteristics, reservoir characteristics and other shale gas resource conditions. During the Leping period, sandstone, carbonaceous shale, silty mudstone and mudstone were deposited in Leping period. The shale mainly distributed in Fengcheng area and Leping area, and some paleoplants developed to form coal-bearing swamp deposits. It can be seen that interlaced bedding and muddy lenticular bedding are a set of tidal flat coal clastic deposits. The organic geochemical analysis shows that the organic matter content of the organic shale of Leping formation in the study area is relatively high and belongs to the better source rock, and the content of organic matter in Pingxiang area is the highest. The analysis of organic macerals and kerogen carbon isotopes shows that the parent material of the organic matter of Leping formation is humic source rock with terrestrial higher plants, the type of organic matter is mainly type 鈪，

本文編號(hào)：2070789