A method and device for predicting carbonate fracture-cavity reservoirs
A technology for prediction of carbonate rocks and reservoirs, applied in the field of exploration, can solve problems such as inconsistent results, difficult to use, and indirect and clear results, and achieve high prediction accuracy and increase the success rate
Active Publication Date: 2017-10-17
PETROCHINA CO LTD
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Therefore, the P-wave anisotropy test results are very expressive, resulting in inconsistent results. From the user's point of view, the P-wave anisotropy test results do not obtain the distribution of simple fracture-vuggy reservoirs, and the results are not straightforward. difficult to use
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[0062] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0063] figure 1 A schematic diagram showing the carbonate fracture-cavity reservoir prediction method provided by the present application, such as figure 1 As shown, the method includes:
[0064] Step S101: preparing seismic data;
[0065] Step S102: perform seismic horizon interpretation on the seismic data;
[0066] Step S103: Gener...
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Embodiments of the present application provide a method and device for predicting carbonate fracture-cavity reservoirs, the method comprising: preparing seismic data; performing seismic horizon interpretation on the seismic data; generating an average velocity of converted shear waves from the seismic data ; According to the seismic data and the average velocity of the converted shear wave, the gradient data volume and the intercept data volume of the converted shear wave are obtained; the lithology indicator data volume is generated according to the gradient data volume and the intercept data volume of the converted shear wave; Generate a pseudo-porosity coefficient data volume according to the lithology indicator factor data volume; match the longitudinal wave and the converted shear wave to determine the longitudinal span range of the converted shear wave wave field time domain; according to the pseudo-porosity coefficient data volume and the conversion The longitudinal span of the shear wave field time domain is used to predict fracture-vuggy reservoirs in carbonate weathering crust.
Description
technical field [0001] The present application relates to the field of exploration technology, in particular to a method and device for predicting carbonate rock reservoirs. Background technique [0002] There are oil fields and oil and gas reservoirs in the underground bottom layer, and the bottom layer that preserves oil and natural gas is called oil and gas reservoir. Oil and gas reservoirs are mostly bottom layers with certain porosity. Among them, the reservoirs containing a large number of fractures or mainly fractures are fracture-type reservoirs, such as mudstone fracture reservoirs, sandstone fracture reservoirs, carbonate rock fracture reservoirs, and volcanic rock fracture reservoirs. The oil and gas layers formed are fracture-type reservoirs. oil and gas reservoirs. [0003] The purpose of oil exploration is to comprehensively use geophysical exploration methods, earth gravity or magnetic exploration methods, logging exploration methods, geological exploration ...
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IPC IPC(8): G01V1/28G01V1/30
Inventor 刘军迎雍学善刘伟方高建虎
Owner PETROCHINA CO LTD