地质勘探
天然气勘探与开发
桂中坳陷南丹地区中一下泥盆统塘丁组
富有机质页岩储层特征谭旭航＇王雁？售
侯明才3.4
张聪5李波
2017年6月出版
1.中国石油川庆钻探工程公司地质勘探开发研究院2.四川省冶金地质勘察院3.成都理工大学沉积地质研究院
4.“油气藏地质及开发工程”国家重点实验室·成都理工大学5.中国地质调查局油气调查中心
摘要滇野桂垒地桂中增陷南丹地区泥盆系页卷特征研究较少，为了进一步评价该地区下一中泥盆统塘丁组页岩气勘探前景，以野外露头剖面观察和钻并资料为基础，结合幕片签定，对该地区泥盐系贾岩特征进行了研究。结果表明；①桂中陷泥盆纪广泛海侵和陆内裂陷使该地区发展成为“合一盐相间”格局，台垒环境发育大量页岩和碳质泥岩，其中塘丁组为一套黑色、深灰色、灰黑色泥页岩沉积，具有页岩气开发潜力；①塘丁组混页署厚度大，有机质率度高（有机碳含量介于0.38%～4.21%)，成熟度介于1.5%～3.6%，储层微孔隙发育，脆性矿物含量适中（介于44%～76%），具备形成页岩气的资源基础和成藏条件； ①南丹地区塘丁组发育有连续且具一定厚度的页岩地层，其地化特征、物性特征及沉积厚度可与北美及四川页岩气储层对比。结论认为该区塘丁组页岩具有较好的页岩气勘探潜力，塘丁组上段页岩气开发潜力好于下段，
关键词桂中地陷南丹地区泥盆纪塘丁组有机质页岩气储层特征勘探潜力 DI: 10.12055/gaskk.issn.1673-3177.2017.02.005
Characteristics ofTangdingFormationorganic-richshaleinNandan area,
GuizhongDepression
TanXuhang,WangYan",HouMingcai"+,Zhang Cong”,Li Bo
(I.Institute of Geological Exploration and Development, CNPC Chuanqing Drilling Engineering Company Limited, Chengdu, Sichuan 610059,China; 2.Sichuan Geological Institute of Metallurgy,Chengdu, Sichuan 6100593,Chi-na; 3.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology, Chengdu, Sichuan 610059, China; 4. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059,China; 5.Oil and Gas Survey, China Geological Survey,Beijing 100029,China)
Abstract: The characteristics of Devonian shale in the Nandan area of Guizhong Depression are less studied. In order to further eval-uate the shale gas exploration potential of Tangding Formation, LowerMiddle Devonian in this area, the characteristics of Devonian shale in the Nandan area of Guizhong Depression were studied in this paper based on outcrop section observation and drilling data, combined with thin section analysis. It is shown that the "platformbasin" alternative pattern is developed in Nandan area due to De-vonian extensive transgression and intracontinental rift in the Guizhong Depression. A great amount of shale and carbonaceous mud-stone is developed in platformbasin environment. The Tangding Formation is a set of black, dark gray and gray black mud shale de-posits, and it has the development potential of shale gas. The Tangding Formation mud shale is characterized by large thickness, high abundance of organic matter (TOC 0.38% ~ 4.21%), higher maturity (1.5% ~ 3.6%), presence of reservoir micropores and moderate brittle mineral content (44% ~ 76%), so it provides the resource base and accumulation conditions of shale gas. In the Nandan area, shale strata are developed continuously with a certain thickness. Compared with the shale gas in North America and Sichuan from the aspects of geochemistry, physical property and sedimentary thickness, the Tangding Formation shale gas in the Nandan area is better in shale gas exploration potential. It is indicated that the shale gas development potential of the upper member of Tangding Formation is better than that of thelowermember.
Keywords: Guizhong Depression; Nandan area; Devonian; Tangding Formation; Organic matter; Shale gas; Reservoir characteristics; Explorationpotential
基金项目：中国地质调查局油气资源调查中心项目“大南盘江地区泥盆、石炭系富有机质页岩层系沉积特征及岩相古地理编图”（编号：12120115005101)。
第一作者：谭旭航，1991年生，硕士；在中国石油川庆钻探工程公司地质勘探开发研究院从事油气地质研究工作。地址：（610051）四川省成都市成华区建设北路一段83号。电话：18108081697，E-mail：417517321@qq-com。
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