克依构造带储层伤害因素评价实验研究

Evaluation Experiments About Reservoir Damage in Ke-Yi Structural Belt

克依构造带是塔里木油田最重要的产气构造之一。由于对该构造储层地质特征及引起储层伤害的潜在因素的认识和研究不够充分,导致在不同作业过程中对储层造成不同程度的伤害。在分析克依构造带气藏地质特征及其主要潜在伤害因素的基础上,通过大量岩心流动实验,对储层的伤害因素及其伤害程度进行了评价,并结合储层岩石学特征研究了敏感性产生的原因。研究结果表明:克依构造带吐孜、克拉苏、吐北和依南4个区块气藏伤害类型多样且各自程度不同,由吐孜、克拉苏、吐北到依南综合伤害程度依次增大。针对各类敏感性的产生条件,提出了具体的防治措施与建议,为保护储层提供了科学依据。

Ke-Yi structural belt is one of the most important gas structural belts in Talimu oilfield. The research and understanding about the reservoir geologic characteristics and the potential factors for reservoir damage in this structural reservoir are not very clear, therefore, the damage with different degree has occurred during the operation. Based on the analysis of gas reservoir geologic characteristics and the main potential damage factors in Ke-Yi structural belt, and many core flow tests. According to reservoir petrologic features, the causes for sensitivity were analyzed. The research results suggested: the damage types and damage degrees of gas reservoirs in the 4 blocks of Tuzi, Kelasu, Tubei and Yinan in Ke-Yi structure were different. The comprehensive damage degree increased one by one from Tuzi, Kelasu, and Tubei to Yinan. The control measures and suggestions were established based on the forming causes of various sensitivities, and they could provide scientific reference for reservoir protection.