Evaluation of Ordos Basin in China
- CSI Consulting, Bellaire, TX (United States)
Ordos basin lies in the north-central China, in a compression tectonic regime, with an area of approximately 250,000 km{sup 2}, including several pay zones ranging from Cambrian to Jurassic. It is one of the earliest-formed marine to continental-superimposed basin in China, characterized by Proterozoic basin-marginal rifling and Lower-Paleozoic carbonate platform development followed by western thrusting and foreland depression during Mesozoic. It underwent several tectonic movements and is covered by several structural layers, with many play types developed, primarily thrust and anticlinal plays in the west, and differential compaction (river-channel sand lens) or drape as well as buried hill plays in the basin center and east. Ordos basin is a prolific gas basin with an estimated resource potential of gas 656,091 billion m{sup 3} in the Paleozoic strata and oil 2.0474 billion tons in the Mesozoic strata. In 1986, in the western part of the basin, the well Tian-1 on the Tianchi structure tested gas at a rate of 16 x 10{sup 4} m{sup 3}/d (about 5.6496 MCF per day). By year-end 1991, only 26 wells had been drilled in the Jingbian to Hengshan areas (northeastern part of the basin), but 16 of them flowed commercial gas, ranging from 3.2 x 10{sup 4} m{sup 3}/d to 126 x 10{sup 4} m{sup 3}/d. However, the gas pipe just starts budding. Therefore, there will be a lot of gas yet to find, and the most critical factor for petroleum potential of each local structure or play in this basin is the reservoir development.
- OSTI ID:
- 272666
- Report Number(s):
- CONF-9607116-; ISSN 0149-1423; TRN: 96:003409-0075
- Journal Information:
- AAPG Bulletin, Vol. 80, Issue 6; Conference: American Association of Petroleum Geologogists (AAPG) Rocky Mountain section meeting, Billings, MT (United States), 28-31 Jul 1996; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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