张家垛油田阜三段Ⅲ砂组沉积微相特征与沉积模式

doi:10.11743/ogg20130606

Abstract

Abstract: Four types of lithofacies are identified in the 3rd member of Funing Formation in Zhangjiaduo oilfield,the Su-bei Basin,including dark mudstone,bioturbated siltstone,siltstone-fine sandstone lithofacies with argillaceous laminates and burrow as well as fine sandstone with parallel bedding.Upward-coarsening reverse rhythm is the main section structure,followed by first upward-coarsening and then upward-thinning composite rhythm,while positive rhythm is very rare.All the features of lithofacies,section structure,logging facies and cumulative grading curve show that the 3rd member of Funing Fm is typical shallow lake beach-bar facies.According to the sedimentary characteristics and spatial distributions,the reservoirs are further divided into sandstone of bar microfacies and sandstone of beach microfacies.A beach-bar sedimentary model is proposed.The sandstone reservoirs of bar microfacies are high in hydrocarbon fullness,due to its low shale content and high porosity.In contrast,the sandstone reservoirs of beach microfacies show great variance in hydrocarbon fullness as argillaceous laminations are well developed,heterogeneity is week,and hydrocarbons mainly fill in the fine sandstone lithofacies with parallel bedding and argillaceous laminates+burrow fine sandstone lithofacies.

Key words: shallow lacustrine, beach-bar, sedimentary microfacies, sedimentary model, Funing Formation, Zhangjiaduo oilfield, Subei Basin

CLC Number:

TE121.3

Chen Qianqian, Ding Xiaoqi, Wan Youli, Zhang Shaonan. Microfacies characteristics and sedimentary models of the third member of Funing Formation in Zhangjiaduo oilfield[J]. Oil & Gas Geology, 2013, 34(6): 751-757.

References

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Microfacies characteristics and sedimentary models of the third member of Funing Formation in Zhangjiaduo oilfield

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