成像测井地应力方向判别方法适应性分析  

Adaptability analysis of ground stress direction discrimination method in imaging logging

作　　者：李静文 刘荣芳 吴健 赵永昌 Li Jingwen;Liu Rongfang;Wu Jian;Zhao Yongchang

机构地区：[1]中国石油集团测井有限公司华北分公司

出　　处：《国外测井技术》2024年第3期56-60,2,共6页World Well Logging Technology

摘　　要：地应力方向是在油气田勘探开发研究中需要获知的一项重要地质资料信息,为压裂改造、井网部署等提供有利指导。阵列声波测井和电成像测井可以实现地应力方向的识别。通过分析两种成像测井资料确定地应力方向的方法及其适用性,发现阵列声波各向异性确定地应力方向存在多解性,高角度裂缝及高角度地层倾角均会影响地应力方向的判断;而根据电成像测井资料图像显示的地质信息进行判断更为可靠。研究表明,钻井诱导缝与最大水平地应力方向一致,井壁崩落与最小水平地应力方向一致,椭圆井眼长轴方向与最小水平主应力一致。在同一口井中利用电成像不同特征方法进行地应力方向判断,有着很好的一致性,并且与整个区域地质背景的研究认识一致。以此构建了测井成像资料进行地应力方向识别的综合方法。The direction of geo-stress is an important geological data information that should be obtained in oil and gas exploration anddevelopment field research. It can provide favorable guidance for the later fracturing reconstruction, well pattern layout optimization andso on. Array acoustic logging data and electrical imaging logging data can be used to identify the direction of geo-stress. By analyzingtwo methods of determining the direction of geo-stress with imaging logging data and their applicability, it was founded that there aremultiple solutions of geo-stress direction discrimination by using array acoustic anisotropy. High angle fractures and high angleformation dip angles both can affect the determination of geo-stress direction. But it is more reliable to identify geo-stress directionbased on the geological information which displayed in the electrical imaging logging data images. The research showed that the drillinginduced fractures have the same direction as the maximum horizontal stress, the borehole breakouts have the same direction as theminimum horizontal stress and the long axis of the elliptical hole has the same direction as the minimum horizontal stress. Usingdifferent characteristic methods of electrical imaging in the same well to judge the geo-stress direction, which showed they had a goodconsistency, and were consistent with the study result of the geological background of the whole region. Based on this research,acomprehensive method for identifying the direction of geo-stress using imaging logging data was constructed.

关 键 词：地应力方向 测井 阵列声波 电成像 图像 

分 类 号：TD3[矿业工程—矿井建设]