Vol. 330 No. 6 (2019)

DOI https://doi.org/10.18799/24131830/2019/6/2140

POSSIBILITIES OF GEOPHYSICAL METHODS FOR PREDICTING RESERVOIR FRACRURES

This article presents the results of an analysis of Russian and foreign publications, performed in order to characterize the current state of an issue of using geophysical methods to predict reservoir fracturing. The paper describes the peculiarities of fracture occurrence depending on its genesis. The authors have characterized tectonic and geological conditions of crack formation and the relation between cracks and fissures. The text also provides a geological model of cracking. The paper introduces the characteristic of methods which allows studying the fracturing both in a well (the methods of geophysical surveys of wells) and from the surface (according to the results of seismic exploration) and the features of the most demanded seismic attributes for solution of these problems. The description is given and the range of tasks to be solved is determined both for the most widespread variants of well logging and innovative methods offered by Schlumberger on the basis of well logging methods. A conclusion is made that well logging methods need to be integrated. The physical bases of seismic study methods of fracturing are given and the main attributes are described. Their capabilities and limitations are determined and as a result the range of issues demanding additional research is outlined. The aim of the research is to identify the areas for further research in order to improve the efficiency of geophysical work in studying fractured reservoirs by creating a review of geophysical methods used to identify the areas for increasing fractures, further analysis of existing methods and determination of the best ways to solve these problems. Results. The article analyzes geophysical methods for identification of fractured reservoirs (both well logging methods and seismic attributes). The circle of unsolved problems is defined. The direction for further research is outlined.

Results. The article analyzes geophysical methods for identification of fractured reservoirs (both well logging methods and seismic attributes). The circle of unsolved problems is defined. The direction for further research is outlined.

Keywords:

Reservoir, fissured-cavernous type, seismic attributes, geophysical methods of well logging

Authors:

Alexandr N. Orekhov

Amani Mangoua Marc M