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针对致密砂岩气藏的储层特征及渗流机理,建立并求解了考虑储层应力敏感性和裂缝导流能力的致密砂岩气藏压裂井不稳定渗流数学模型,进一步开发出应力敏感性致密砂岩气藏压裂井产能递减典型曲线图版,利用图版拟合可以求取致密砂岩气藏应力敏感储层参数及压裂工艺参数,形成一套快速有效的致密砂岩气藏压裂井动态反演技术及动态产能确定方法。通过苏里格气藏压裂井实例分析,验证了该应力敏感性致密砂岩气藏压裂井动态反演技术方法的可靠性,有助于致密砂岩气藏的高效开发。
Aiming at the reservoir characteristics and seepage mechanism of tight sandstone gas reservoirs, a mathematical model of unsteady seepage of fractured wells in tight sandstone gas reservoirs considering reservoir stress sensitivity and fracture conductivity is established and solved. The stress-sensitive tight sandstone A Typical Graph Plate of Productivity Decreasing in Fractured Wells in Gas Reservoirs The plate-fitting method can be used to obtain the stress-sensitive reservoir parameters and fracturing parameters of tight sandstone gas reservoirs, and to form a set of fast and effective dynamic inversion techniques for fractured wells in tight sandstone gas reservoirs And dynamic production capacity determination method. Through the case analysis of fracturing wells in the Sulige gas reservoir, the reliability of the dynamic inversion method of fractured wells in the gas-tight sandstone gas reservoir is verified, which is helpful for the efficient development of tight sandstone gas reservoirs.