基于阵列感应测井径向侵入特征的油水层识别方法

针对地层水矿化度变化大、油气水层电阻率测井径向响应特征多样化以及低阻油气层识别难度大等技术难点,充分发挥阵列感应测井技术优势,研究阵列感应测井径向侵入特征,提高油气水层的识别能力.介绍阵列感应数值模拟研究成果以及阵列感应定性、定量解释方法.通过对钻井液侵入地层静态及动态特征进行分析,研究不同条件下油水层的径向侵入特征,为阵列感应测井资料解释油水层提供理论依据,提出阵列感应测井的径向侵入特征描述方法,同时建立的基于阵列感应测井径向侵入特征的油水层识别方法在实际生产中取得了较好的应用效果.

Oil-water layer recognition method of radial intrusion feature based on array induction imaging log

To overcome the technical difficulties of high formation water salinity diversity, big response characteristics alteration of radial resistivity log,low resistivity reservoirs identification ratio, array induction logging with technical superiority was adopted. Its radial invasive characteristics were studied to improve the gas-water layer recognition accuracy. Results of numerical simulation of array induction were introduced and qualitative and quantitative interpretation methods were presented. The analyses of static and dynamic characteristics of drilling fluid invasion provided a theoretical basis for interpretation of oil and water layers. The radial invasive characterization method of array induction imaging logging was proposed and an oil-water layer recognition method based on it was developed. The technology achieved good application effect.