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- Title
The transport system and its control on reservoir formation in the eastern front of the Altun Mountain, Qaidam Basin.
- Authors
TIAN Guang-rong; BAI Ya-dong; PEI Ming-li; LI Hong-zhe; SUN Xiu-jian; MA Feng
- Abstract
The eastern front of the Altun Mountain in the Qaidam Basin is located in the Jurassic hydrocarbon generation depression in the south of the basin, with a long distance between source and reservoir. The evaluation of fault conductivity shows that the near-north-south fault is the main oil source fault in this area, which mainly controls the vertical migration of oil and gas, and controls the differential accumulation of oil and gas in the key period of reservoir formation. The “TR” unconformity is the most important regional angle unconformity in this area, which can be divided into two types: Bedrock unconformity and Jurassic unconformity, all of which have three layers of structure, including bottom gravel layer, weathered residual layer and semi weathered layer. Among them, the weathered eluvium and the semi weathered layer of bedrock have strong transport ability, mainly controlling the long-distance lateral migration of oil and gas. The relationship between faults and unconformity can be divided into two types and three types of combination. The combination type determines the reservoir forming mode, and the combination type controls the dominant migration channel and hydrocarbon accumulation.
- Subjects
RESERVOIRS; GAS migration; MOUNTAINS; PETROLEUM industry; HYDROCARBON analysis; SHIELDS (Geology); METHANE
- Publication
Natural Gas Geoscience, 2020, Vol 31, Issue 3, p5
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2019.12.002