多因素影响下低渗透气藏动态储量计算新方法

New dynamic reserves calculation for low permeability gas reservoir with multi-factored influences

 郭奇 3 李祯² 陈开远¹ 孙晨⁴

中国地质大学（北京）能源学院，北京 100083 中国石化胜利石油工程有限公司测井公司，山东 东营 257000 胜利油田森诺胜利工程有限公司，山东 东营 257000 中国石化胜利油田分公司技术检测中心，山东 东营 257000）

School of Energy Resources, China University of Geosciences, Beijing 100083, China Logging Company, Shengli Petroleum Engineering Co. Ltd., SINOPEC, Dongying 257000, China Shengli Oilfield Sino Shengli Engineering Co. Ltd., Dongying 257000, China Technology Inspection Centre, Shengli Oilfield Company, SINOPEC, Dongying 257000, China)

 低渗透气藏渗流过程中，受滑脱效应、应力敏感性和启动压力梯度等因素影响，且通过传统流动物质平衡法进行低渗透气藏动态储量计算时需要关井恢复获得地层压力参数。针对低渗透气藏的实际问题，文中运用考虑多因素影响的产能公式与物质平衡方程相结合建立多目标函数的方法，通过遗传算法对井底压力和产气量进行拟合，得到计算低渗透气藏合理动态储量的新方法。研究表明，考虑多因素的影响，新方法计算得到的动态储量值较为准确，将其应用于实际低渗透气藏动态储量的计算，取得了较好的效果。新方法对低渗透气藏动态储量计算具有重要意义。

 The seepage of low permeability gas reservoir is affected by slip effect, stress sensitivity and starting pressure gradient, and dynamic reserves calculation by the traditional flow material balance method needs shut-off to obtain the real formation pressure parameter. In view of low permeability gas reservoir practical problems, multi-factored influences of the productivity formula and material balance equation are established to make a multi-objective function. Through genetic algorithm, bottom hole pressure and gas production are fitted to obtain a new calculation method of reasonable dynamic reserves of low permeability gas. The results show that new method is more accurate in calculating the dynamic reserves with considering multi-factored influences. The new method is applied to the calculation of an actual low permeability gas reservoir block dynamic reserves and achieves good results, which has important significance for the low permeability gas reservoirs dynamic reserve calculation.

10.6056/dkyqt201605011