Geochemical characteristics of natural gas and reservoir continuity of the second member of Xujiahe Formation in the Pingluoba structure, Sichuan Basin

被引：0

作者：

Wang, Shun-Yu ^{[1
]}

Ming, Shuang ^{[1
,2
]}

Liang, Cong ^{[1
]}

Zhang, Ting-Shuai ^{[1
]}

机构：

[1] Southwest Petroleum University

[2] Gas Production Engineering Research Institute of Southwest Oil and Gas Field Company

来源：

Natural Gas Geoscience | 2014年 / 25卷 / 03期

关键词：

Continuity; Geochemical characteristics; Pingluoba Structure;

D O I：

10.11764/j.issn.1672-1926.2014.03.0388

中图分类号：

学科分类号：

摘要：

Based on the comprehensive analysis of gas composition, compound specific carbon isotopic composition and natural gas enrichment light hydrocarbon fingerprint, natural gases of the Second Member of Xujiahe Formation (T3x2) reservoirs in Pingluoba Structure have the same or similar geochemical characteristics. The high methane content, high dryness coefficient and heavy carbon isotope indicated that the natural gas was a product of high mature stage. They were originated from the Xujiahe Formation of the Upper Triassic. However, due to different accumulation time, some subtle geochemical differences existed in the hydrocarbon fingerprint characteristics. The results showed that the continuity between wells is good for the main structure at the high parts. The continuity between wells is also good for the southeast wing of the structure, but relatively poor in the north-west wing of the structure. However, compared to that for the main structure at the high parts, the continuity between wells is relatively poor both in the southeast and north wings of the structure, especially the Pingluo 15 well in the northwest wing of the structure which has the worst continuity with others.

引用

页码：388 / 393

页数：5

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