偶极横波远探测测井技术应用研究

The application research of dipole acoustic reflection imaging technology

基于偶极横波远探测技术的基本原理和方法,中海油服研发设计了偶极横波远探测测井仪器,并通过对各种岩性地层中井资料的采集与成像处理,结合常规测井和电阻率成像测井等资料,讨论该技术在实际井中的应用效果.实际应用表明,偶极声波远探测测井能够反映井壁之外70 m范围内地层界面、裂缝、断层和溶蚀孔洞的声阻抗异常,填补了常规声波测井与地震勘探之间的空白,能在一定程度上解释缝洞型储集层中测井评价与试油结果之间的矛盾.采用四分量的数据采集方式便可以根据偶极声源的方位指向性确定反射体走向的方位.

COSL has developed dipole acoustic system based on the fundamental theory and method of the dipole acoustic imaging technology.Through well data acquisition and image processing in various lithologic formation,integrated with conventional logging and resistivity image logging data,the applied effect can be evaluated.It was found that the resulting image can be used to evaluate the growth of the formation layers,fractures,faults and solution caves at a distance of up to 70 meters from the wellbore.This technique can help in fractured reservoirs to resolve differences between well logging interpretation and oil testing to a certain extent,and fills the gap between acoustic well logging and seismic exploration.By using a four-component data acquisition method to record the dipole-generated reflection signal,the reflector orientation can be determined.