无测试资料条件下气井合理产能优化研究

Optimization of Rational Gas Well Productivity without Well Testing Data

在气藏开发方案设计中,气井合理产能是气藏经济开采的重要决策依据。垦东34块馆上段气顶油藏位于胜利油气区极浅海海域,矿场无稳定试井资料。为确定气井合理产能,采用经济极限初始产量、临界携液产量、绝对无阻流量和数值模拟方法进行了优化研究。研究结果表明,气井合理产能控制在1.5×104m3/d时,可实现气井在不出砂条件下长期稳产,并可提高气顶油藏开发效果。投产后气井生产效果理想,从而为无稳定试井资料条件下确定气井合理产能提供了一套操作性较强的研究方法。

Determination of gas well rational productivity is one of the most important foundations of gas reservoir economic development decision among the development project planning.Guantao gas cap reservoir of KD34 block is located in neritic area of Shengli petroliferous province,and its gas formations can't perform systematic well testing on production platform.Several research methods,such as initial economic-limit productivity,critical liquid-carrying capacity,absolute open-flow capacity and numerical simulation,were applied to optimize and determine the rational productivity of gas well.The research indicated that the gas well had obtained long-term and stable production period without sand flow,and the development results of gas cap reservoir had been enhanced on the condition that the rational productivity was controlled to fifteen thousand cubic meters per day.The productivity of gas wells were ideal after putting into production.The research results provided a set of operational research methods for determining the productivity of gas well for lack of systematic well testing data of gas formation.