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本文给出定容气藏动态预测的新模型：两区互补物质平衡法。它考虑了气藏开采中高产区和低产区之间区域性压力差异和区域间的气量补给，是对传统物质平衡法的一种修正。利用新的数学模型研究了陕甘宁盆地中部气田在不同井网和开发指标下的生产动态以及区域间补给量的变化规律，说明非均质气藏区域间压力差异造成的气窜是影响气田动态的重要因素。对于低渗透气田，在满足一定稳产年限和总产量水平的条件下，为了提高开发的经济效益，应当适当提高区域间非均衡开采程度，即在高产区多打井，利用高产区的井采出一部分低产区的天然气，从而减少低产区的井数
In this paper, a new model of dynamic prediction of fixed capacity gas reservoirs is proposed: the two regions’ complementary material balance method. It takes into account the differences in regional pressures and inter-regional gas supplies between high-yielding and low-yielding areas in gas exploration and is amending the traditional material balance method. The new mathematic model was used to study the production dynamics of the gas field in the central Shaanxi-Gansu-Ninh Binh Basin under different well patterns and development indices and the variation of the inter-regional recharge. The results show that the gas channeling caused by the pressure difference between heterogeneous gas reservoirs is an important factor influencing the gas field Dynamic important factor. For low-permeability gas fields, to meet the requirements of a certain stable yield and total output, in order to improve the economic benefits of development, the degree of unbalanced mining should be appropriately increased. That is, more wells should be drilled in the high-yielding areas and the wells using high- A portion of the low-producing areas of natural gas, thereby reducing the number of wells in low-yield areas