气藏开发动态物理模拟技术

Physical simulation technology for gas reservoir development behavior analysis

随着国内天然气工业的快速发展,越来越多的复杂气藏投入开发。这些气藏地质条件复杂,储层非均质性强,开发难度大,开发动态和开发规律在早期难于分析和预测,从而影响气藏建产规模和开发技术政策的制定。为此,提出利用现代物理模拟技术,建立气藏开发动态物理模拟技术,根据相似性原理,依据不同的储层地质特征,采用真实岩样建立物理模型,模拟不同生产条件下气井的生产规律,分析储层向气井的供气动态特征,为研究气藏的开发动态、优化气井生产制度等提供依据。

There are more and more complex gas reservoirs exploited with the rapid development of gas industry in our country.In the early period,it’s extremely difficult to analyze and predict the performance of these sorts of gas reservoirs with the characteristics of complex geological features and heavy heterogeneity.All of these disadvantages of these reservoirs will undermine the establishment of the development technology policy and production scale of gas reservoirs.The paper,therefore,proposed the combination of the substan-tial core samples and the physical simulation technology of gas reservoirs development performance to build up physical model which was based on the principle of similarity,according to the various formation geological characteristics of gas reservoirs.The physical model could simulate the production performance of gas well in different conditions and analyze the dynamic characteristic of gas flow from the formation to the gas well.The physical model can provide the different simulation in terms of the development performance of gas reservoirs and optimization of the production policy of gas well.The technology of physical model could design different models such as the production dynamic model of heterogeneity low permeability formation,commingling production model,water immersion of edge-bottom water gas reservoirs and formation style gas storage injection-production model according to the requirements of research.The development performance of various sorts of gas reservoirs can be simulated by combining the suitable experiment program and equipment.The physical model in this paper provided the method to investigate the production mechanism and production principle of various gas reservoirs and it has extraordinary practical value to investigate the performance of the development in the complex gas reservoirs.