An Equivalent Fracture Modeling Method

2017 International Conference on Environmental, Industrial and Energy Engineering

生态环境科学;工业技术;能源学

Li, Shaohua^1 ; Zhang, Shujuan^2 ; Yu, Gaoming^3 ; Xu, Aiyun^2

Faculty of Earth Science, Yangtze University, Wuhan

430100, China^1

Research Center of Huabei Field, Renqiu

062552, China^2

Faculty of Petroleum Engineering, Yangtze University, Wuhan

430100, China^3

关键词: Conventional logging;    Discrete fracture network models;    Discrete fractures;    Fracture density;    Fracture network models;    Fracture simulations;    Imaging logging;    Sequential Gaussian simulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/104/1/012007/pdf
DOI  :  10.1088/1755-1315/104/1/012007

来源: IOP

【 摘 要 】

3D fracture network model is built based on discrete fracture surfaces, which are simulated based on fracture length, dip, aperture, height and so on. The interesting area of Wumishan Formation of Renqiu buried hill reservoir is about 57 square kilometer and the thickness of target strata is more than 2000 meters. In addition with great fracture density, the fracture simulation and upscaling of discrete fracture network model of Wumishan Formation are very intense computing. In order to solve this problem, a method of equivalent fracture modeling is proposed. First of all, taking the fracture interpretation data obtained from imaging logging and conventional logging as the basic data, establish the reservoir level model, and then under the constraint of reservoir level model, take fault distance analysis model as the second variable, establish fracture density model by Sequential Gaussian Simulation method. Increasing the width, height and length of fracture, at the same time decreasing its density in order to keep the similar porosity and permeability after upscaling discrete fracture network model. In this way, the fracture model of whole interesting area can be built within an accepted time.