Clastic composition of MesozoicCenozoic reservoirs in the western Jiuquan Basin: Implications for evolution of basinrange pattern and hydrocarbon accumulation.

Earth Science Frontiers ›› 2010, Vol. 17 ›› Issue (5): 306-314.

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Clastic composition of MesozoicCenozoic reservoirs in the western Jiuquan Basin: Implications for evolution of basinrange pattern and hydrocarbon accumulation.

1PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
2Key Laboratory of Basin Structure and Petroleum Accumulation, CNPC, Beijing 100083, China
3State Key Laboratory of EOR, Beijing 100083, China
4Yumen Oilfield, PetroChina, Jiuquan 735000, China

Received:2010-03-31 Revised:2010-05-26 Online:2010-09-15 Published:2010-10-22

Abstract

Abstract:

The study of detrital composition of sandstones is an important method for understanding provenance types, basinrange evolution and tectonic attributes. The sandstone framework grains of the Xiagou Formation of Lower Cretaceous in western Jiuquan Basin generally show low detrital maturity, characterized by source from recycled orogen and part of magmaticarc. The Xiagou Formation mainly consists of provenances of metamorphic and intermediate acidic volcanic (few sedimentary rocks). The detrital compositions show obvious differences in provenance between the western and eastern area of western Jiuquan Basin. The detrital composition of Baiyanghe Formation is very different from that of Xiagou Formation, implying the changes in provenance attribute. Combined with previous research results, the changes in provenance attribute reflect the evolution of tectonic diversity and basinrange pattern, which control the oil and gas enrichment and the late hydrocarbon accumulation in western Jiuquan Basin. The detrital composition that controls the reservoir space and development law of fractures is worthy of further study.

Key words: western Jiuquan Basin, sandstoneconglomerate reservoir, detrital composition, basinrange pattern, hydrocarbon accumulation

CLC Number:

FANG Shi-Hu, SONG Yan, DIAO Meng-Jun, YUAN Qiang-Dong, HANG Wei-4, HONG Feng. Clastic composition of MesozoicCenozoic reservoirs in the western Jiuquan Basin: Implications for evolution of basinrange pattern and hydrocarbon accumulation.[J]. Earth Science Frontiers, 2010, 17(5): 306-314.

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Clastic composition of MesozoicCenozoic reservoirs in the western Jiuquan Basin: Implications for evolution of basinrange pattern and hydrocarbon accumulation.

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