Dolomite reservoir prediction method and system based on well and seismic combination, and storage medium

Abstract

The invention discloses a dolomite reservoir prediction method and system based on well and seismic combination, and a storage medium. The method comprises the following steps: acquiring logging dataof a testing area; carrying out sensitive curve analysis on logging data of a drilling area, obtaining a dolomite index characteristic curve, and distinguishing dolomite and limestone according to response range difference of the dolomite index characteristic curve; carrying out artificial intelligence deep learning on the dolomite index characteristic curve of the drilling area to obtain a dolomite index characteristic curve of a virtual drilling area; and by taking the dolomite index characteristic curves of the drilling area and the virtual drilling area as constraint conditions, carrying out inversion by adopting post-stack seismic data to obtain distribution and development conditions of a dolomite reservoir in the testing area. According to the method, the dolomite and the limestoneare effectively distinguished through the dolomite index characteristic curve; through the artificial intelligence deep learning and by combining the post-stack seismic data, the distribution and development conditions of the dolomite reservoir in the testing area can be accurately predicted; and the effective prediction method is provided for exploration work of a few-well area.

Description

technical field [0001] The invention relates to the field of oil and gas exploration, in particular to a dolomite reservoir prediction method, system and storage medium based on well-seismic combination. Background technique [0002] As one of the most important carbonate reservoirs, dolomite has been favored by explorers for many years. In recent years, the discovery of many large oil and gas fields in China is closely related to the status of dolomite reservoirs, so the exploration method of predicting the distribution of oil and gas fields based on the distribution of dolomite reservoirs has been paid more and more attention. Due to the fast longitudinal and lateral phase changes and strong heterogeneity of dolomite reservoirs, especially the small difference in shear wave impedance and limestone, it is difficult to distinguish between dolomite layers and limestone layers on seismic sections. At present, the geophysical prediction of dolomite reservoirs is mostly based o...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a dolomite reservoir prediction method, system and storage medium based on well-seismic combination, which is used to solve the problem that dolomite and limestone are difficult to distinguish on the shear wave impedance diagram in the prior art, and in few wells Problems with relatively large limitations when using post-stack inversion technology for dolomite reservoir prediction

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