苏里格气田苏14 井区盒8 段河流相砂体展布与演化规律研究

doi:10.3969/j.issn.1673-8926.2013.01.012

Lithologic Reservoirs ›› 2013, Vol. 25 ›› Issue (1): 56-62.doi: 10.3969/j.issn.1673-8926.2013.01.012

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Fluvial sand bodies distribution and evolution of He 8 member in Su 14 block of Sulige Gas Field

BAI Zhenhua^{1，2， 3}， ZHAN Yantao⁴， WANG Ying¹， ZENG Liyuan¹

1. China University of Petroleum， Beijing 102249， China； 2. PetroChina Research Institute of Petroleum Exploration & Development， Beijing 100083， China； 3. Key Laboratory of Basin Structure and Hydrocarbon Accumulation， CNPC， Beijing 100083， China； 4. School of Earth and Space Science， Peking University， Beijing 100871， China

Online:2013-02-20 Published:2013-02-20

Abstract

Abstract:

The fluvial sand bodies are characterized by rapid lateral facies variation, weak continuity and connectivity and strong reservoir heterogeneity, which seriously affect the development of the fluvial reservoir. Based on the study of the reservoir sedimentology, the fluvial sand bodies distribution and evolution of He 8 member in Su 14 block were studied. The result shows that the sedimentary background in the He 8 member is gradual transition from the early braided river deposition to the later meandering river deposition, and the sedimentary microfacies mainly includes channel lag deposits, channel bars, point bars, crevasse splays, natural levees, overbank sand and mud deposits. By the influence of the interaction between the base level and the sediment supply, the fluvial evolution experienced three stages, which are the braided river prosperous development stage, the braided river and meandering river coexistence and transforming stage and the meandering river prosperous development stage. The sand bodies of channel bar and point bar in the stage of the braided river prosperous development and the braided river and meandering river coexistence and transforming are the main gas-bearing reservoirs. The development of favorable gas-bearing sand bodies is controlled by sedimentary microfacies and base level cycles.

Key words: structural attitude, fault distribution, structural evolution, trap, Chaoshui Basin

BAI Zhenhua，ZHAN Yantao，WANG Ying，ZENG Liyuan. Fluvial sand bodies distribution and evolution of He 8 member in Su 14 block of Sulige Gas Field[J].Lithologic Reservoirs, 2013, 25(1): 56-62.

References

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