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新疆温吉桑地区温八块凝析气藏属低孔、低渗 ,非均质性较严重气藏 ,试井测试资料较少 ,常规的产能确定方法 (如利用试井资料确定产能方程 ,采气指数法或一点法 )应用较困难 ,文章从气井渗流理论出发 ,以二项式产能方程为基础 ,对气井渗流方程进行了分析研究 ,结合温吉桑温八块凝析气藏具体情况 ,提出新的气井产能确定方法———单位平方地层压力无阻流量法及单位地层系数采气指数法 ,并进行了实例计算 ,最后结合气井连续排液条件和数值模拟结果 ,遵循一定的配产原则 ,确定了该区块的气井合理产能和配产指标 ,为开发方案的编制和实施提供了理论依据和技术支持 ,深化了气藏工程的研究 ,这些方法可以推广应用于其它气藏或凝析气藏。
Wen 8 condensate gas reservoir in Wenjisang area of Xinjiang is a gas reservoir with low porosity, low permeability and high heterogeneity. There are few well test data and routine production capacity determination methods (such as using well test data to determine productivity equation, Gas production index method or one-point method) is more difficult to apply. Based on the seepage theory of gas well, based on the binomial productivity equation, this paper analyzes and studies the seepage equation of gas well. Combining with the specific conditions of Wenge Sang Wen condensate gas reservoir , Proposed a new determination method of gas well productivity --- unit square strata pressure unobstructed flow method and unit stratum coefficient gas index method, and carried out an example calculation. Finally, according to the gas well continuous drainage conditions and numerical simulation results, follow a certain allocation Principle, to determine the rational production capacity and allocation of gas wells in this block, which provides a theoretical basis and technical support for the preparation and implementation of development plans, and deepens the research on gas reservoir engineering. These methods can be applied to other gas reservoirs or condensates Gas reservoir.