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储层渗透率和孔隙度与压力之间的依赖关系严重影响着井的生产动态。本文通过油藏数值模拟和分析生产数据曲线的方法从理论上研究了这个问题。介绍了一个适用于应力敏感储层、微可压缩流体的单相流体的流动方程。对这个方程进行拉普拉斯空间求解可得出井的产量随时间变化的关系图(恒定井底压力生产)。对其求解,要先将这个流体流动方程转化为压力项和压力平方项和的函数形式。应力敏感储层中油藏数值模拟结果与理论预测结果的一致性出现得比非应力敏感储层的慢,但是储层的应力敏感性并没有影响油藏数值模拟得出的储层最终采收率值。应力敏感储层的曲线显示储层的应力敏感性不会影响容量分析结果。应力敏感储层生产数据分析说明这个方法会低估泄油面积。分析标准型曲线得出的渗透率值小于地层的原始渗透率值。
Reservoir permeability and the dependence between porosity and pressure have a significant impact on well production. This paper studies the problem theoretically by means of reservoir numerical simulation and analysis of production data curve. A flow equation of single-phase fluid suitable for stress-sensitive reservoirs and micro-compressible fluids is presented. Laplacian Spatial Solving for this equation yields a plot of well production over time (constant bottomhole pressure production). To solve it, we first convert this fluid flow equation into a functional form of sum of pressure terms and pressure squared terms. The consistency of reservoir numerical simulation results with theoretical prediction results in stress-sensitive reservoirs appears to be slower than that of non-stress-sensitive reservoirs, but the reservoir stress sensitivity does not affect the final reservoir recovery from reservoir numerical simulations Rate value. The curves of stress-sensitive reservoirs show that the reservoir’s stress sensitivity does not affect the capacity analysis. Stress-sensitive reservoir production data analysis shows that this method underestimates the drainage area. The standard curve results in less than the original permeability of the formation.