Structural Control on Hydrocarbon Accumulation and Its Implication for Petroleum Exploration in Northern Qaidam Basin
详细信息
- 责任者：Fang Shihu (Key Laboratory of Basin Structure and Petroleum Accumulation ; CNPC ; Beijing 100083 ; China) ; Zhao Mengjun
- 刊名：Earth Science Frontiers
- 出版年：2013
- 卷期：20(5
- 关键词：油气勘探 ; petroleum exploration ; 油气藏形成 ; reservoir formation ; 柴达木盆地 ; Qaidam Basin
- 页码：p.132-138
- 图表：7 illus., 33 refs.
- 分类号：1003
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
The major controlling factors of oil and gas distribution in Northern Qaidam are unclear because of the complexity of the structural system,leading to the difficulties in finding new potential exploration directions.The intensive compression and adjustment driven by the Late Cenozoic tectonism led to highly deformed thrust belt.For absence of major décollement horizon,the structural style in Northern Qaidam are mainly basement-controlled structures,forming relative broken tectonic system with congruous folding between upper and lower structural layers.Two stages of hydrocarbon accumulation during the Himalayan period combining the accumulation conditions and structural formation determined that the succeeding palaeostructures since the early Himalayan period may be the advantageous area for oil and gas exploration in the Northern Qaidam.But the hydrocarbon distribution became complex owing to the adjustment and destruction of strike-slip tectonism.The control of strike slip-compressional tectonic system on hydrocarbon accumulation and distribution and its combination with palaeo-structure,and the source rock evolution and its generation of oil and gas implied that the palaeo-structure flanks toward the depression may be the advantageous exploration areas for hydrocarbon enrichment.
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