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

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.