不同开发时期砂岩油藏储层非均质三维模型特征

doi:10.11743/ogg20060510

Abstract

Abstract:

The calculation of heterogeneous aggregative index,together with its function and significance,is briefed based on the data acquired from the Block Ⅱof Shengtuo oilfield.The 3-D modeling of heterogeneous aggregative index by employing the reservoir stochastic method includes the following five stages:preparation of reservoir data,construction of model,analysis of heterogeneous aggregative index,construction of heterogeneous model,and display of modeling results.The spatial heterogeneity of reservoir is vividly characterized by the model.An analyze of the variation function and 3-D model characteristics of heterogeneous aggregative index of sandstone in the Third Member of Dongying Formation in its earlier,middle,and later stages of development reveals the changing pattern of reservoir heterogeneity at different development phases.According to the results, the range of influence(a)decreases with waterflooding,while the sill value(c_o+c)increases and nugget value(c_o)remains zero.The initial,middle and late development stages are characterized by moderate,moderate to relatively strong,and strong reservoir heterogeneities,respectively.Vertically,the heterogeneous aggregative index varies greatly in the upper part of the reservoir and is more constant in the lower part.Vertical interformational and intra-formational heterogeneities are stronger than lateral heterogeneity.Water injection intensifies the heterogeneity of reservoirs.

Key words: heterogeneous aggregative index, reservoir heterogeneity, 3-D model, development stage, Shengtuo oilfield, Dongying sag

CLC Number:

TE112.2

Yang Shaochun, Wang Ruili. Characteristics of heterogeneous 3-D model of sandstone reservoirs in different development stages[J]. Oil & Gas Geology, 2006, 27(5): 652-659.

References

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Characteristics of heterogeneous 3-D model of sandstone reservoirs in different development stages

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