Effects of cementing quality on the development of bottom-water gas reservoirs evaluated by numerical simulation
One production-commingled well in multi-layer gas reservoirs with bottom water,western of the South China Sea,was tak-en as an objective to evaluate effects of cementing quality on reservoir development.Firstly,an evaluation method to quantitatively characterize this quality based on equivalent grids was established according to principles of both seepage and pipe flow phase.Then,two techniques of numerical simulation such as virtual tracer and streamline model were used to conduct time-varying characteriza-tion in complex water channeling,and accordingly a development plan was optimized.Finally,the cementing-quality effects on the development of bottom-water gas reservoirs were analyzed quantitatively.Results show that(i)the established evaluation method can simulate not only channeling outside pipes under pipe flow and seepage states but the situation between these two states,allowing it to be more realistic and practical;and(ii)by combining radial grid refinement with two simulation techniques for time-varying char-acterization in complex channeling,the effects of poor cementing quality can also be analyzed.This method is of guiding significance for optimizing the development plan and analyzing the later production performance in bottom-water gas reservoirs.
Water-drive gas reservoirCementing qualityDevelopment planQuantitative evaluationNumerical simulation
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