Method for forecasting high-quality reservoir of carbonate oil-gas reservoirs by utilizing disorder parameter seismic attributes

Abstract

The embodiment of the invention provides a method for forecasting a high-quality reservoir of carbonate oil-gas reservoirs by utilizing disorder parameter seismic attributes. The method comprises the following steps: exciting an artificial seismic source on the earth surface, acquiring seismic records through an instrument (cymoscope) on the earth surface, processing the seismic data to obtain three-dimensional post-stack seismic data, carrying out well-seismic calibration by utilizing logging data, determining an objective interval, performing seismic data horizon interpretation on the objective interval, extracting disorder parameter seismic attributes and utilizing the disorder parameter seismic attributes to guide reservoir forecasting. Compared with a conventional seismic attribute reservoir forecasting method, the method provided by the invention has the characteristics of clear and definite physical significance, reliable forecast result and the like.

Description

technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a method for predicting high-quality reservoirs of carbonate oil and gas reservoirs by using the seismic attributes of disorder degree. Background technique [0002] Seismic exploration is to excite an artificial seismic source on the surface, and the vibration caused by the seismic source propagates underground in the form of seismic waves, and under certain conditions, it is reflected upwards and sent back to the surface, and then the reflected seismic waves are recorded by the surface instrument (receiver). Seismic records (also called seismic data) are thus obtained. Seismic records are obtained through the underground medium, and must be affected by the physical properties of the underground medium (such as lithology, porosity, density, and fluid properties), and this effect is then stored in the seismic record as the comprehensive information of the undergro...

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Problems solved by technology

[0004] Carbonate oil and gas reservoirs are usually characterized by complex controlling factors, poor regularity, and strong heterogeneity, and their reservoir prediction has always been a difficult point in geophysical exploration.

At present, although there are various types of seismic attributes, due to their unclear physical meaning and application conditions, it is difficult to evaluate the reliability of reservoir prediction results, and they are rarely directly used to guide the prediction of high-quality reservoirs in carbonate oil and gas reservoirs.

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