分区物质平衡法在边水气藏动态预测与优化布井中的应用

Multi-region material balance method and its use in the performance prediction and optimal well pattern design of edge water reservoir

为了克服传统物质平衡法及数值模拟法研究气藏动态过程中存在的缺陷,将气藏分区物质平衡法推广应用到边水气藏被划分成任意区块的情形,该方法考虑了气藏的区域非均质性,所需资料水平与拥有资料相一致。基于分区物质平衡法研制出的MMBS软件可快速获得最优区块布井方案,有利于发挥高产区块的产能,减少低产井。计算实例说明,区块间的补给量占单井产量的比例相当大,必须充分认识和利用区块间的补给流动。

In order to overcome the deficiencies of the material balance method and numerical simulation methods in studying the gas reservoir performance, the material balance method for multi-region gas reservoir is extended to the case where the reservoir has edge water region and is divided into arbitrary number of blocks. The new method takes into account the regional heterogeneity of the gas reservoir, and the data required in the new method are acquired in field production. The software MMBS based on the multi-region material balance method could help to conveniently optimize the well pattern, make the best use of the productivity of high yield blocks and decrease the number of low yield wells. The calculation example shows that the recharge from the neighbor blocks contributes a lot to the single well production.