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对于压力敏感储层 ,需确定试油压差的合理范围。根据单相微可压缩流体在变形双重介质中作非达西渗流的数学模型 ,研制了数值模拟软件。通过了解有关的地层参数和流体性质、特别是储层对压力的敏感程度 ,利用该软件计算不同压差下的产量 ,绘制产量与压差的关系图 ,根据图形的极大值点和泡点 (露点 )压力确定合理的试油压差范围。给出了应用实例。该软件还可用于试井分析和产能评价。
For pressure-sensitive reservoirs, determine a reasonable range of test pressure differential. According to the mathematical model of non-Darcy seepage flow of single-phase micro-compressible fluid in deformable double medium, numerical simulation software was developed. By understanding the related formation parameters and fluid properties, especially the reservoir sensitivity to pressure, the software calculates the yield under different pressure drops and plot the relationship between output and pressure drop. According to the maximum point of the graph and the bubble point (Dew point) pressure to determine a reasonable test oil pressure range. The application example is given. The software can also be used for well test analysis and production evaluation.