摘要
Abstract
Imaging logging can provide fracture parameters (width, length, density, face porosity, etc.) and the fracture type, but it often takes a lot of time to process imaging logging by manual processing.In this paper, the overall property of the reservoir is taken as the research object, and a method of automatically and finely describing the fractures is studied by means of programming.The method realizes automatic stratification and statistics of the corresponding fracture values by analyzing the curves of fracture parameters.At the same time, it can also generate the reservoir fracture table and the natural fracture table.In addition, on the basis of determining the numerical classification criterion of single fracture according to inclination angle and orientation, the method also comprehensively considers the spatial distribution of the fractures in the target interval and the possible intersection relationship, so that, the combination type of fracture is divided into the following eight types:horizontal fracture, vertical fracture, low-angle fracture, high-angle fracture, high-angle oblique joint fracture, low-angle oblique joint fracture, mixed oblique joint fracture, messy oblique joint fracture, etc.The statistical definition and the specific discriminant algorithm based on the main frequency analysis for each fracture type are also given.Through statistical analysis, the main strike of the fracture in the reservoir is determined, and the difficulty of opening while fracturing is judged according to the angle between the strike and the direction of the geo stress.The corresponding geostatistical module was developed using the CIFLog logging interpretation platform, and the processing results of theimaging logging are consistent with the manual analysis.This module has been well applied in the imaging logging interpretation of deep volcanic rocks and Tadong carbonate rocks.It not only improves the interpretation efficiency, but also effectively guides the design of the fracturing plan, and provides key reference information for the fracturing of the reservoir.关键词
成像测井/裂缝/发育参数/产状类型/倾角/压裂/地应力/主频分析Key words
imaging logging/fracture/development parameter/type of occurrence/dip angle/fracturing/geo-stress/main frequency analysis分类
天文与地球科学
