Carbonate reservoir interpretation method and interpretation template establishment method

Abstract

The invention provides a carbonate reservoir interpretation method and an interpretation template establishment method. The interpretation template establishment method comprises the steps that a interpretation template of a carbonate reservoir under low frequency and/or medium frequency and/or high frequency is established; low-frequency and/or medium-frequency and/or high-frequency condition elastic parameter test results of cores with different porosities in a target layer of a work area under different oil saturation degrees are acquired; the low frequency is consistent with earthquake dominant frequency, the medium frequency is consistent with logging frequency, and the high frequency is consistent with stratum ultrasonic testing frequency; the low-frequency and/or medium-frequency and/or high-frequency condition elastic parameter test results of the cores with different porosities under different oil saturation degrees are projected into a coordinate system of which the coordinate axes represent longitudinal and transverse wave parameter ratio and longitudinal wave impedance; and a query chart of longitudinal and transverse wave parameter ratio values and longitudinal wave impedance values of the cores with different porosities and different oil saturation degrees under low-frequency and/or medium-frequency and/or high-frequency conditions is established, where the querychart is the interpretation template of the carbonate reservoir under the low-frequency and/or medium-frequency and/or high-frequency conditions.

Description

technical field [0001] The invention relates to geophysical technology in the petroleum industry, in particular to a method for interpreting carbonate rock reservoirs and a method for establishing an interpretation scale. Background technique [0002] To achieve quantitative interpretation of earthquakes, it is necessary to use rock physics research to establish accurate correspondence between reservoirs, fluids, and seismic elastic parameters. Seismic rock physics research includes two aspects: 1. Rock physics theoretical modeling research; 2. Rock physics laboratory testing technology research. [0003] The seismic rock physics method that is widely used in the petroleum industry is a theoretical modeling method of rock physics. The rock physics model of the research target is established to carry out logging curve prediction and quantitative interpretation of reservoir fluid. For the process of petrophysical modeling, there are usually quality control means, which can be...

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Problems solved by technology

[0004] There is an obvious problem of poor accuracy in this process, and even through these calibrations, there is still a huge interpretation bias

Especially when using the established interpretation scale to interpret seismic data, the effect is particularly bad, because the general rock physics modeling does not consider the factor of dispersion, and the data used to calibrate the interpretation scale are high frequency (ultrasonic measurement ) and medium frequency (logging data), while the inversion results to be interpreted are low frequency (seismic frequency band)

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