Lacustrine thin-layer dolostone reservoir stratum earthquake prediction method

Abstract

The invention discloses a lacustrine thin-layer dolostone reservoir stratum earthquake prediction method, which relates to the engineering field of petroleum industry and geology. The method comprises: obtaining the seismic data body of a target reservoir stratum and the rock slices of a single-well reservoir stratum; making a micro analysis of the rock slices; obtaining the distribution of the dolostone reservoir strata of the single-well reservoir stratum; through the well logging method, obtaining the well logging curves of the single-well reservoir stratum; obtaining the well logging curve of the single-well reservoir stratum sensitive to the dolostone reservoir stratum; based on the well logging curve of the single-well reservoir stratum sensitive to the dolostone reservoir strata, creating a well logging identification template; loading the well logging identification template into the seismic data body; and predicting the distribution of the dolostone reservoir strata of the target reservoir stratum. According to the method proposed by the embodiments of the invention, it is possible to predict the lacustrine thin-layer dolostone reservoir strata with its single stratum thickness ranging from 0.5 to 1.5 meters. This overcomes the restrictions of the dolostone earthquake resolution, is able to accurately perform the predictions on the earthquakes of the lacustrine thin-layer dolostone reservoir stratum and increases the success rate of drilling wells.

Description

technical field [0001] The invention relates to the field of geological engineering in the petroleum industry, in particular to an earthquake prediction method for lacustrine thin-bed dolomite reservoirs. Background technique [0002] Lacustrine thin-bed dolomite is widely distributed in China's continental basins. Since the thickness of a single layer is about 0.5-1.5 meters, the thickness is very thin, and it is very difficult to identify lithology and predict earthquakes. At present, petroleum geology experts at home and abroad do not have an effective method for identifying and predicting lacustrine thin-bed dolomite. They only identify and predict qualitatively. There are many factors considered in theory, and the actual drilling situation is not considered too much. , that is, the well-seismic combination is not well combined, which has caused certain application limitations. For example, the earthquake prediction dolomite thickness is 10 meters, but in fact the drill...

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Problems solved by technology

At present, petroleum geology experts at home and abroad do not have an effective method for identifying and predicting lacustrine thin-bed dolomite. They only identify and predict qualitatively. There are many factors considered in theory, and the actual drilling situation is not considered too much. , that is, the well-shock is not well combined, which has caused certain application limitations

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