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长庆靖边气田下古气藏是以裂缝—溶蚀孔(洞)为主的层状碳酸盐岩气藏。为提高储量计算结果的可靠性,在容积法的基础上,充分考虑沟槽对于储量计算的影响,采用了单井控制面积法、落空井比例法、确定性模型法等多种方法进行计算比较,其中考虑沟槽分布影响后的确定性模型法计算结果最为准确,应用该方法对靖边气田下古气藏储量进行了计算。计算结果为气田深入开发、开发方案设计和扩边井网部署提供了可靠的依据。
The paleo-gas reservoirs in the Lower Reaches of Changqing-Jingbian Gas Field are layered carbonate reservoirs dominated by fractures-dissolution pores (holes). In order to improve the reliability of the calculation results of reserves, on the basis of the volumetric method, the influences of the trenches on the calculation of reserves are taken into full consideration. Various methods such as single-well controlled area method, empty-well ratio method and deterministic model method are used to calculate and compare The deterministic model method considering the influence of groovedistribution has the most accurate calculation results. The reserves of the lower paleo-gas reservoirs in Jingbian gas field are calculated by this method. The calculation results provide a reliable basis for the further development of gas field, the design of development scheme and the deployment of the expanded well.