本文關鍵詞： 淮南煤田 泥頁巖 微相 有機質 有利勘探區(qū)　出處：《煤田地質與勘探》2017年06期 　論文類型：期刊論文

【摘要】：在對淮南地區(qū)二疊系巖性、礦物和生物化石進行觀測研究以及相關地球化學參數(shù)測試的基礎上,對淮南地區(qū)這一時期的沉積相演化特征及其與烴源巖之間關系進行分析。結果表明:淮南地區(qū)早、中二疊世時期海水震蕩性后退,總體以水下沉積為主,大致可劃分為2種沉積亞相:山西組的三角洲沉積和下石盒子組的水下分流河道沉積,又可以進一步細分為前三角洲、泥炭沼澤、分流河道、決口扇、河漫灘等微相,泥頁巖在前三角洲和河漫灘相最發(fā)育。巖性和顯微組分的組成受沉積微環(huán)境變化的控制作用明顯,"(腐泥組+殼質組)/∑顯微組分"以大于等于70%為主,利于生氣;有機碳含量則受沉積亞相和沉積微環(huán)境的共同控制,山西組泥頁巖中有機碳平均質量分數(shù)約2.78%,明顯高于下石盒子組泥頁巖中的1.11%。綜合考慮泥頁巖累計厚度、有機碳含量及有機質的顯微組成等因素認為,研究區(qū)山西組和下石盒子組都可作為頁巖氣的有利勘探層位,尤以"潘集鎮(zhèn) 潘集區(qū) 泥河鎮(zhèn) 平圩鎮(zhèn)"這一帶最為有利。
[Abstract]:Based on the observation and study of Permian lithology, minerals and biofossils in Huainan area and the measurement of related geochemical parameters, The evolution characteristics of sedimentary facies and the relationship between sedimentary facies and source rocks in Huainan area were analyzed. It can be divided into two types of sedimentary subfacies: the delta deposits of Shanxi formation and the underwater distributary channel deposits of the Lower Shihezi formation, and can be further subdivided into microfacies such as pre-delta, peat swamp, distributary channel, crevasse fan, floodplain, etc. Shale is the most developed facies in pre-delta and floodplain. The composition of lithology and maceral is obviously controlled by the change of sedimentary microenvironment. The content of organic carbon is controlled by sedimentary subfacies and sedimentary microenvironment. The average mass fraction of organic carbon in shale of Shanxi formation is about 2.78, which is obviously higher than 1.11 in shale of Lower Shihezi formation. The organic carbon content and the microstructure of organic matter show that Shanxi formation and Xiashihezi formation in the study area can be used as the favorable exploration horizon for shale gas, especially in the area of "Guannihe Town, Guanghing Wei Town, Panji Town, Panji Town".
【作者單位】： 安徽理工大學地球與環(huán)境學院;
【基金】：國家自然科學基金項目(41302129,41402140) 2013年度安徽省地質勘查基金第三批(續(xù)作)(2013-3-18) 安徽省自然科學基金項目(1408085QE88)~~
【分類號】：P534.46;P618.13

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