成像测井综合分析地应力方向的方法

A Method of Analyzing Crustal Stress Orientation Using Imaging Logging

地应力方向与裂缝延伸方向有着密切的联系,地应力是指导油田注水开发的重要参数。成像测井资料包含了丰富的地层地应力信息,利用成像测井资料可以方便、准确地确定地应力的大小和方向。在分析地应力测井响应特征的基础上,利用微电阻率扫描成像测井(STARⅡ)与交叉偶极子声波成像测井(XMAC)提供的多种资料,采用多种方法综合确定了地应力方向,通过多种方法的相互验证进一步剔除了非应力因素对地应力解释的影响。应用成像测井综合确定地应力方向的方法,在安棚油田的应用中取得了良好的效果,由测井分析所得到的结果与岩心测试所得到的结果一致,为油田注水开发提供了可靠的依据。

The crustal stress orientation is closely related to crack extension orientation. And stress orientation is very important in water flood development. The imaging logging extracts a lot of useful information of crustal stress, and the magnitude and orientation of crustal stress can be determined using imaging logging data. Based on the analysis of well logging response characteristics, the crustal stress orientation was determined using the data from imaging logging of STAR Ⅱ and XMAC. The impact of nonstress factors on stress determination was removed. This method was used in Anpeng Oilfield and obtained very good result. The result from logging data analysis is consistent with that from core measurements, therefore it can provide reliable basis for water flooding development.