摘要
To study the response characteristics of dual laterolog in fractured-cavernous reservoirs,a model of fractures and caves was built,and the 3D finite element method was utilized to simulate its logging responses.Caves of certain size have influence on the response of dual laterolog within certain space.The logging response of fractured-cavernous formation is mainly affected by fractures,and low angle fractures result in a negative difference of dual laterolog which is contrary to high angle fractures,but the existing caves do not change the matching relationship between the shallow and deep resistivity and fracture dip.The apparent conductivity of dual laterolog in fracture-cave formation presents a linear relationship with fracture aperture.