Energy constraint heterogeneous reservoir thickness identification system

Abstract

The invention relates to an energy constraint heterogeneous reservoir thickness identification system. The system comprises the steps of acquiring accurate reservoir data parameters by single well logging; acquiring an optimal wavelet; constructing a reservoir basic wavelet function; constructing a basic function of energy constraint reservoir thickness spectrum, psi=|a|<-1 / 2>[c*psi(t / a)-dpsi(t-b) / a], wherein psi is a wavelet function, t is time, b is the time difference between a top and a bottom interface, a is a scale parameter of different time and the scale parameter varies with frequency, and c and d are cosine square fringing attenuation functions; building the energy constraint reservoir thickness spectrum of a seismic trace near the well; carrying out three dimensional data space thickness prediction; with the aid of the machine three dimensional display system software of a computer, carrying out stereoscopic display on the reservoir thickness data obtained by the prediction.

Description

Technical field: [0001] The invention relates to an energy-constrained heterogeneous reservoir thickness identification system. Background technique: [0002] The purpose of oil exploration is to comprehensively use geophysical exploration, geochemical exploration, geogeological exploration and other methods to find the spatial distribution and internal structure of oil and natural gas in underground reservoirs, which is of great significance to oil and gas exploration and development. The geophysical prospecting method is one of the most widely used earthquake prediction techniques. For the continental sand-mudstone formations and special reservoirs such as carbonate rocks and volcanic rocks that are common in my country, most of them are reservoirs within 10 meters. For the determination of reservoir thickness, geophysicists have done a lot of in-depth and meticulous work, and have made great progress. The combined well-seismic inversion and geological statistical modelin...

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Problems solved by technology

[0005] To sum up, there are some problems in reservoir thickness prediction at this stage: wave impedance inversion prediction reservoir has multiple solutions; spectral decomposition due to its decomposition particularity such as fixed time window, aliasing high and low frequency information will inevitably lead to multipolar The value problem exists, which brings difficulty to the interpretation of reservoir thickness

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