多区不等厚横向非均质复合气藏试井分析模型及压力特征

doi:10.11743/ogg20060110

Abstract

Abstract:

In view of the characteristics of uneven development of lithology and strong heterogeneity in Sulige low permeability gas reservoir of Changqing oilfield, a well test analytical model for multizone, non-isopachous and lateral heterogeneous composite gas reservoirs is established, which comprehensively takes into consideration the skin effect, wellbore storage effect, formation characteristics of gas reservoirs and variation of formation thickness. Laplace transformation is used to achieve the numerical solutions of reservoir pseudopressure under two typical outer boundary conditions, infinity and closed boundary, to plot the typical curve of bottom-hole pressure drawdown, and to analyze the pressure behavior characteristics. This model has been used to interpret the real well test data of Sulige gas reservoir, and the interpretation results are in good accordance with the actual production performance, indicating that it is practical for studying the characteristics of low permeability gas reservoirs.

Key words: non-isopach, heterogeneity, composite gas reservoir, transient well test, model, pressure

CLC Number:

TE353

Fu Weishu, He Shunli, Ran Yingzhi, Zhang Guangying. Well test analytical model and pressure characteristics of multizone, non-isopachous and lateral heterogeneous composite gas reservoirs[J]. Oil & Gas Geology, 2006, 27(1): 124-130.

References

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Well test analytical model and pressure characteristics of multizone, non-isopachous and lateral heterogeneous composite gas reservoirs

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