本文選題：和田凹陷　切入點：普司格組　出處：《天然氣地球科學》2017年11期 　論文類型：期刊論文

【摘要】：二疊系是葉城—和田凹陷最為重要的烴源巖層系之一。通過和田凹陷杜瓦地區(qū)野外露頭剖面及最新鉆井分析,并結(jié)合有機地球化學測試數(shù)據(jù),對二疊系普司格組烴源巖沉積特征、古環(huán)境及有機地球化學特征進行研究。結(jié)果表明:普司格組烴源巖發(fā)育在濱湖、淺湖及半深湖亞相中,烏魯吾斯塘地區(qū)和杜瓦地區(qū)為烴源巖沉降中心,以低Pr/Ph值、較高伽馬蠟烷指數(shù)等為特征,表現(xiàn)出較強還原性、較高鹽度下具有一定水體分層的湖相沉積產(chǎn)物。普司格組烴源巖有機碳(TOC)值為0.12%~5.68%,為"差—中等"烴源巖,有機質(zhì)類型以Ⅱ型、Ⅲ型為主,鏡質(zhì)體反射率RO值為0.72%~1.385%,主體已進入成熟—高成熟階段。結(jié)合地震資料、生儲蓋條件分析認為,杜瓦地區(qū)普司格組烴源巖生烴潛力較好,逆沖推覆體為油氣勘探的可能有利區(qū)域,準原地質(zhì)體為塔西南坳陷山前帶最為有利的油氣勘探區(qū)域,原地質(zhì)體埋深很大,是目前勘探工作面臨的主要挑戰(zhàn)之一。
[Abstract]:Permian is one of the most important source rock systems in Yecheng-Hotan Sag. Through field outcrop profile and latest drilling analysis in Dua area of Hetian Sag, combined with organic geochemical test data, The sedimentary characteristics, paleoenvironment and organic geochemistry of the Permian Bussiger source rocks are studied. The results show that the source rocks of the Permian are developed in littoral, shallow and semi-deep lacustrine subfacies. The Wulustang area and the Duwa area are the center of source rock subsidence, which are characterized by low Pr/Ph value and high gamma alkane index. The organic carbon toc value of Bussiger source rock is 0.12 ~ 5.68, which is "poor to medium" source rock. The organic matter types are mainly type 鈪，

本文編號：1584344