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随着油气田勘探工作的日益深入，近年来在我国发现大量深层气藏和凝析气藏，尤其在塔里木地区。为了搞清塔里木油田深层气藏岩石渗透率应力敏感特性，通过塔里木油田岩心渗透率应力敏感性实验，研究了深层岩石的有效覆压与渗透率的关系，分析了渗透率应力敏感特征与机理。实验结果表明：随着有效覆压增加岩石孔隙结构和骨架结构发生变化，会引起岩石渗透率的下降；岩石渗透率越低或有裂缝存在，应力敏感特性表现更强烈；随着异常高压气田开发过程的进行，地层压力逐渐下降，进而诱发岩石渗透率损失是不可逆的。

STUDY ON STRESS SENSITIVITY OF PERMEABILITY FOR DEEP GAS RESERVOIRS IN TALIMU 1)

As oil and gas exploration deepens further more, many deep gas and condensate reservoirs have been found in China, especially in Talimu basin. To know the stress sensitivity of permeability for the deep gas reservoirs in Talimu oil field, with stress sensitivity experiments of core permeability for Talimu oil field, the relationship between the effective overburden of deep reservoirs and the permeability is investigated, and the features and mechanism of stress sensitivity is analyzed. The experimental results show: the porous structure and matrix structure of the reservoirs will change to make the permeability decrease as the effective overburden increases. The stress sensitivity appears stronger for the reservoirs with lower permeability or fractures. The permeability loss is not reversible since the reservoir pressure decreases gradually as gas exploitation is conducted in abnormal pressure gas reservoirs.