Characteristics of dual laterolog response of net-fracture reservoirs in horizontal well
WANG Xiao-Ming1, WAN Wen-Chun2, ZHAO Jian-Wu3, ZHOU Li-Yan3
1. PetroChina HuaBei Oilfield Company Exploration & Development Research Institute, Renqiu 062552, China; 2. The 5th Oil Production Plant of Changqing Oilfield, CNPC, Yulin 718600, China; 3. Evaluation Center of Logging Co., Ltd., Petrochina, Xi'an 710201, China
Abstract：The widespread net-shaped fracture reservoirs have good reservoir capacity. The dual laterolog can recognize fractures effectively. The dual laterolog logging response within the net-shaped fracture reservoir was simulated through the 3-D finite element method, with emphasis placed on the influence of logging response such as fluid resistivity, bedrock resistivity and fracture dip. The results show that the apparent resistivity increases with the increasing fluid resistivity in the fracture, but the rate is pretty small. The apparent resistivity increases with the increasing bedrock resistivity, but this kind of influence will decrease when the bedrock resistivity is very small. The net-shaped fractures formed by the low angle fractures often hinder current strongly. The conclusions above can provide theoretical reference for the horizontal well bore logging evaluation with the net-shaped fracture reservoir.
