Diabase alteration zone reservoir prediction method based on combination of well and seism
A technology of reservoir prediction and well-seismic combination, applied in the field of diabase alteration zone reservoirs, can solve problems such as ineffective prediction methods
Inactive Publication Date: 2012-10-31
PETROCHINA CO LTD
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At present, domestic research on this type of reservoir is mostly limited to the scope of drilling, and its origin, structure, mineral composition, physical properties and other characteristics are analyzed from the drilling data, and it is studied as a whole with the diabase body in the plane range. Does not form an effective prediction method for its size and reservoir characteristics alone
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[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0035] In the prior art, it has been proposed to use the logging data of known wells as the starting point to summarize its logging response and wave impedance characteristics; combine the wave impedance inversion data volume obtained by seismic inversion and the multi-attribute inversion natural Gamma data volumes, where the distribution and thickness of diabase alteration zones are predicted. However, this document only predicts the distribution and thickness of the diabase alteration zone, but does not predict the distribution range and developm...
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The invention relates to a diabase alteration zone reservoir prediction method based on combination of a well and seism. The method comprises the following steps of: obtaining the well measuring response characteristics of diabase and an alteration zone, and the wave impedance characteristics of the diabase, the diabase alteration zone and surrounding rocks; carrying out inversion under three-dimensional wave impedance to obtain data on the inversion of the wave impedance so as to predict an interface between the surrounding rocks and the diabase alteration zone within a predicted well area, and carrying out multi-attribute inversion to obtain a natural gamma data volume for predicting an interface between the diabase alteration zone and the diabase within the predicted well area, thus obtaining a crack growing index curve according to the predicted interface between the diabase and the diabase alteration zone and the predicted interface between the diabase alteration zone and the diabase; and finally carrying out multi-attribute inversion to predict the distribution range and the growth degree of cracks of the diabase alteration zone within the predicted well area by taking the obtained crack growing index curve as well measuring parameters.
Description
technical field [0001] The invention relates to a diabase alteration zone reservoir, in particular to a method for predicting a diabase alteration zone reservoir based on well-seismic combination. Background technique [0002] With the development of petroleum exploration technology, the field of exploration has been continuously expanded, and has developed from conventional clastic rock reservoirs to special lithologic reservoirs, and igneous rock reservoirs are one of them. In various oilfields in my country, many oil and gas reservoirs related to igneous rocks have been discovered one after another. Among them, the diabase alteration zone reservoir has become one of the important exploration objects and has received more and more attention. Diabase is a shallow intrusive rock mass. When high-temperature magma intrudes into the formation, the hydrothermal alteration and high-temperature baking of magma will cause contact metamorphism of the surrounding rocks, resulting in ...
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IPC IPC(8): G01V11/00
Inventor 姚军李双文苏明军
Owner PETROCHINA CO LTD