中国地球化学学报（英文版）2009，Vol.28Issue(3)：299-307,9.DOI:10.1007/s11631-009-0299-z
Migration, filling history and geochemical characteristics of Ordovician natural gases in the Tahe Oilfield, Tarim Basin, Northwest China
Migration, filling history and geochemical characteristics of Ordovician natural gases in the Tahe Oilfield, Tarim Basin, Northwest China
WANG Jie 1LIU Wenhui 1QIN Jianzhong 1LIU Keyu 2GU Yi1
作者信息
- 1. Wuxi Institute of Petroleum Geology, SINOPEC, Wuxi 214151, China
- 2. CSIRO Petroleum, P.O.Box 1130, Bentley WA 6102, Australia
- 折叠
摘要
Abstract
Ordovician natural gases in the Tahe Oilfield are composed predominantly of hydrocarbon gases dominated by methane with a significant amount of heavy hydrocarbon gas component. The non-hydrocarbon gases include N2, CO2 and minor H2S. The Ordovician natural gases are believed to have originated from the same source rocks, and are composite of gases differing in thermal maturity. Carbon dioxide was derived from thermal metamorphism of Ordovician carbonate rocks. The generation of natural gases involves multiple stages from mature normal oil and condensate-associated gas to thermally cracked gas at the maturity to over-maturity stages. In the main part of the Tahe Oilfield, the Ordovician natural gases appear to be filled in two major phases with a typical petroleum-associated gas from southeast to northwest and from east to west in the early stage; and a thermally cracked gas from east to west in the late stage. At the same time, the oil/gas filling boundary has been primarily established between the two stages.关键词
Tahe Oilfield/Ordovician system/gas migration/carbon and hydrogen isotopes/genetic featureKey words
Tahe Oilfield/Ordovician system/gas migration/carbon and hydrogen isotopes/genetic feature分类
天文与地球科学引用本文复制引用
WANG Jie,LIU Wenhui,QIN Jianzhong,LIU Keyu,GU Yi..Migration, filling history and geochemical characteristics of Ordovician natural gases in the Tahe Oilfield, Tarim Basin, Northwest China[J].中国地球化学学报（英文版）,2009,28(3):299-307,9.
