Carbonate rock pore component analysis method and system

Abstract

The invention provides a carbonate rock pore component analysis method and system, and belongs to the field of rock physics. The method comprises the following steps: (1) collecting a rock core of carbonate rock, and measuring the rock core to obtain an experimental longitudinal wave speed and an experimental transverse wave speed; (2) establishing an equivalent medium model, and performing predicting by using the equivalent medium model to obtain a predicted longitudinal wave speed and a predicted transverse wave speed; and (3) carrying out inversion by using the predicted longitudinal wave velocity and the predicted transverse wave velocity as well as the experimental longitudinal wave velocity and the experimental transverse wave velocity to obtain the volume content of each pore type in the rock core. According to the method, the pore differentiation effect of the rock in the diagenetic process is fully considered, and the rock physical experiment data and understanding of the region are combined, so that the interpretation cost is greatly reduced; the method can be applied to interpretation of rock cores and logging data, can determine pore distribution characteristics of carbonate reservoirs, is beneficial for interpretation personnel to deduce geological evolution processes and guide seismic data inversion and interpretation, and provides powerful reference for high-quality reservoir evaluation.

Description

technical field [0001] The invention belongs to the field of rock physics, and in particular relates to a carbonate rock pore component analysis method and system. Background technique [0002] The formation of carbonate reservoirs often undergoes complicated geological, biological and chemical actions, and the pore types are much more complex than those of sandstone. The primary pores formed in the early stage and the secondary pores caused by the later transformation are often associated. The pore composition of carbonate rocks is an important basis for deducing the geological evolution process and guiding the interpretation of seismic data, and is also an important indicator for evaluating the economic value of high-quality reservoirs. [0003] Chinese patent publication 201610573709.X discloses a method for predicting the volume content of dissolved pores in carbonate rock reservoirs, which only considers the content of one type of dissolved pores. The pore space analy...

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Problems solved by technology

This kind of method has high accuracy but also brings huge time cost and manual calculation cost

And it can never break through the scale limitation, that is to say, it can only be limited to small-scale statistics in the laboratory, and cannot be extended to large-scale data such as well logging or earthquakes.

In this way, it is not conducive for geologists to deduce the sedimentary evolution process in a large range

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