Methods of Obtaining the Bulk Modulus of Rock Matrix

Abstract

A method for obtaining the bulk modulus of rock matrix is ​​provided, including: (A) determining the equivalent rock matrix of the target logging depth point by using the logging data of the target logging depth point and a predetermined number of logging depth points adjacent to it up and down Bulk modulus; (B) determine the change interval and change increment of the dry rock Poisson's ratio at the target logging depth point; (C) determine the change interval and change increment of the rock matrix bulk modulus at the target logging depth point; (D) The optimal adaptive rock matrix bulk modulus at the target logging depth point is obtained by using the adaptive matrix mineral modulus inversion method under the double convergence condition; (E) the equivalent rock matrix bulk modulus at the target logging depth point The matrix bulk modulus and the optimal adaptive rock matrix bulk modulus are averaged to obtain the rock matrix bulk modulus at the target logging depth point. According to the method, the bulk modulus of rock matrix with high accuracy and stability can be obtained, which lays a favorable foundation for subsequent prediction of oil and gas reservoirs.

Description

technical field [0001] The present invention relates generally to the field of rock physics, and more particularly to a method for obtaining the bulk modulus of a rock matrix. Background technique [0002] With the improvement of the degree of oil and gas exploration, my country has entered the stage of exploration of stratigraphic and lithological reservoirs on land, in which the petrophysical parameter model plays an important role as a bridge in the exploration of reservoirs: the petrophysical parameter model can effectively explain earthquake Linked with the characteristic parameters of oil and gas reservoirs, for example, the basic criteria established through the analysis of petrophysical parameter models can be quantitatively or semi-quantitatively derived from seismic data. degree, pore structure characteristics, etc.), and the oil and gas reservoirs can be predicted by the above characteristic parameters. Therefore, the study of rock physics is the physical basis for...

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Problems solved by technology

[0011] The purpose of the exemplary embodiment of the present invention is to provide a method for obtaining the bulk modulus of the rock matrix, so as to overcome the difficulty in obtaining the bulk modulus of the rock matrix accurately and conveniently in the prior art, and the obtained bulk modulus of the rock matrix has low accuracy and poor stability

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