Oil and gas in the Junggar basin the People`s Republic of China
Journal Article
·
· AAPG Bulletin
OSTI ID:127749
- Karamay Oil Corp., Xinjing (China)
The Junggar Basin, located in the north of Xinjiang, China, and with an area of 130000 km{sup 2}, is a compressional inland basin formed during the late Hercynian. Exploration and development of oil and gas in the basin has been run by Karamay Oil & Gas Corporation (KOC). The basin has two basements, Precambrian crystalline basement and Early to Middle Hercynian fold basement. Maximum sedimentary cover from Late Permian to Quaternary is above 20,000m thick. There are six source rocks developed in Carboniferous, Permian, Triassic, Jurassic, Cretaceous and Paleogene, respectively. Of the most important Permian and Jurassic source rocks, the former is oil-prone and the latter gas-prone. Total oil and gas resources in the basin are about 80-100x10 8t. In the mid 1950`s, Karamay oilfield, which is closely, related to the overthrust belt, was discovered in the northwest margin of the basin. Since then, the proven oil reserves in the up to 250km long overthrust belt with Karamay oilfield being the center can be compared to the Cordilleran Overthrust Belt in North America. By the end of 1993, fifteen oil and gas fields have been discovered, and the oil and gas reservoirs are found in all strata from Carboniferous to Tertiary except Cretaceous. The reservoir lithologies are mainly low mature sandstones, conglomerates as well as late Paeleozoic volcanic rocks. The proven reserves are dominantly distributed in the northwest margin, which illustrated unbalanced exploration. The exploration degree in most part of the basin is still low. Since 1961, the crude oil production has been increasing year after year.
- OSTI ID:
- 127749
- Report Number(s):
- CONF-950995--
- Journal Information:
- AAPG Bulletin, Journal Name: AAPG Bulletin Journal Issue: 8 Vol. 79; ISSN 0149-1423; ISSN AABUD2
- Country of Publication:
- United States
- Language:
- English
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