利用常规地质资料预测低渗透储集层产液量

Predict the fluid production from the low-permeability reservoir by conventional geological data

产液量预测作为常规油气储集层精细解释评价的一种方法已在许多油田受到重视,而针对低渗透储集层的产液量预测更成为人们关注的焦点。该方法基于渗流力学理论和达西定律,经优选确定储集层厚度、地层压力、渗透率及流体饱和度为储集层产液量预测参数,并分析了各预测参数值的求取方法,进而通过回归分析预测产液量与实际产液量的相关性,建立了低渗透储集层产液量预测公式。实际应用表明,该产液量预测公式对于低渗透储集层的产液量预测效果较好,可作为低渗透油田纯油层或以产油为主的油水同层产能预测的一种有效方法;同时,该预测公式的建立方法也为从产液量预测研究逐步上升到产能预测研究奠定了基础。

As a method of fine interpretation and evaluation for conventional oil and gas reservoir,the liquid production prediction has become the focus of attention in many oilfields,while the prediction of fluid production in low permeability reservoir has even been paid more attention to.This method is based on the percolation dynamic theory and Darcy's law,the reservoir thickness,reservoir pressure,permeability and fluid saturation determined by the optimization are treated as the prediction parameters for the reservoir fluid production.The authors analyzed the extracting methods for each predicting parameter value,then analyzed the interrelationship between predicted fluid production rate and the actual fluid production rate by regression,thus establishing the prediction formula of the fluid production rate for the low permeability reservoir.The practical application showed that the prediction formula of the fluid production rate for the fluid production prediction of low-permeability reservoir has a better result and can be used as an effective method for production prediction for the pure oil layers of low permeability oilfields or oil-producing layers of oil and water zones.Meanwhile,the establishment of the prediction formula has also made a foundation for liquid production prediction go up to the production capacity prediction gradually.