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红岗地区高台子油藏的某些层位是明显的低阻油层,搞清这些低阻油层的成因及其分布规律是油田开发的重要任务之一。通过对低阻油层分布规律及其与岩性、岩相和流体性质的分析,查明了低阻油层分布规律及成因。分析表明,纵向上,低电阻率油层主要分布在岩性细、泥质含量高的第21、22、25小层,主要发育在前三角洲相沉积层中。平面上,低电阻率油层主要分布在前三角洲沉积的薄层砂中。低阻油层形成的根本原因是岩石颗粒细、油藏幅度小、泥质含量高及低含油饱和度。这些因素单独作用或共同作用,使该地区部分油层表现出低阻特征。
Some reservoirs in the Gaotaizi reservoir in Honggang area are obviously low resistivity reservoirs. It is one of the most important tasks for the development of oilfields to understand the genesis and distribution of these low resistivity reservoirs. Through the analysis of the distribution law of low-resistivity reservoir and its relationship with lithology, lithofacies and fluid properties, the distribution and genesis of low-resistivity reservoir were identified. The analysis shows that the vertical and low resistivity reservoirs are mainly distributed in the 21th, 22th, and 25th small layers with fine lithology and shale content, mainly in the sediments of the former deltaic facies. In the plane, the low-resistivity reservoirs are mainly distributed in thin sand deposited in the former delta. The basic reason for the formation of low resistivity reservoirs is fine rock particles, small reservoir amplitude, high clay content and low oil saturation. These factors act alone or together to make some of the oil layers in the area exhibit low resistance.