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- Title
塔里木盆地麦盖提斜坡罗斯 2 井油气 地球化学特征及油气源分析.
- Authors
朱心健; 陈践发; 贺礼文; 王艺繁; 张威; 张宝收; 张科
- Abstract
Maigaiti Slope, Bachu Uplift is one of important tectonic units in the west of the Tarim Basin. The Well Luosi 2, which was placed on the Maigaiti slope belt, succeeded in the Penglaiba Formation at the bottom of the Ordovician making a significant breakthrough in oil and gas exploration in new layer. In this paper,the geochemical characteristics of oil and gas of the Well Luosi 2 are studied systematically to discuss the sources and the genetic characteristics of the oil and gas. The results reveal that the crude oil in Well Luosi 2 has a very low level of biomarkers constrained by thermal evolution such as steroidal terpenes and so on, and could not be used as an identification parameter to identify the origin or other geochemical characteristics. Meanwhile, the matured parameters such as adamantane and methyl phenanthrene of crude oil indicate that the mature degree of the crude oil is high that is similar with the Cambrian source rock in this area.The carbon isotope of the whole oil is heavy. Based on the geochemical characteristics of crude oil and the comparison with hydrocarbon source rocks, it should be derived from the Upper Cambrian source rock. For the natural gas of Well Luosi 2, the results reveal that it has a high drying coefficient and the carbon isotope of natural gas is heavy and it should also be derived from the Middle-Upper Cambrian hydrocarbon source, according to the correlation with the crude oil.
- Publication
Natural Gas Geoscience, 2017, Vol 28, Issue 4, p566
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2017.03.001