Carbon, Oxygen Isotope and Trace Element Characteristics of Carbonate Rocks in Changxing-Feixianguan Formation of Puguang Gas Pool and Its Palaeoenvironment Significance

• 责任者：Xu Liheng (China University of Petroleum ; Beijing 102249 ; China) ; Chen Jianfang
• 刊名：Acta Geoscientica Sinica
• 出版年：2009
• 卷期：30(1)
• 关键词：长兴阶 ; Changxingian Stage ; 飞仙关组 ; Feixianguan Formation ; 碳酸盐岩 ; carbonate rocks ; 四川盆地 ; Sichuan Basin
• 页码：p.103-110
• 图表：6 illus., 23 refs.
• 分类号：1200
• issnNo：ISSN1006-3021
• isbnNo：CN11-3474/P

With Wells Puguang 2 and 6 in the Puguang gas field as the research object, the authors used 116 dolomite samples from Changxing-Feixianguan Formation to analyze characteristics of carbonate and oxygen isotopes, judge the ancient seawater salinity and, combined with sedimentary characteristics, study the sedimentary environment. The result shows that δ¹³C and salt Z is positively correlated with each other. From Member 1 and 2 through Member 3 to Member 4 of Feixiangaun Formation in Well Puguang 2, sedimentary facies experienced the evolutionary process of platform edge shallow facies-restricted platform-evaporate flat, and the salinity, δ¹³C, St, P, Ti and Mn values gradually decreased.