Geological profile imaging compensation method and system
A technology of geological section and compensation method, which is applied in the field of geological exploration, can solve the problems of high difficulty, reduced seismic section resolution and signal-to-noise ratio, and low imaging accuracy, so as to increase accuracy, reduce calculation amount, and improve resolution and the effect of the signal-to-noise ratio
Active Publication Date: 2021-08-13
中石化石油工程技术服务有限公司 +2
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However, it is very difficult to obtain the Q value accurately. The inaccurate Q value leads to unsatisfactory compensation effect, the resolution and signal-to-noise ratio of the seismic section are reduced, and the imaging accuracy is low, so the location of small oil reservoirs cannot be accurately determined.
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[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0056] The purpose of the present invention is to provide a geological section imaging compensation method and system, which can improve the resolution and signal-to-noise ratio of geological section imaging, and then accurately determine the position of small oil reservoirs.
[0057] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjun...
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The invention discloses a geological profile imaging compensation method and system, and the method comprises the steps: carrying out the ground surface experiment of each ground surface type in a work area, and obtaining the single-shot data of each ground surface type in the work area; calculating the earth surface compensation factor of each earth surface type according to the single shot data of each earth surface type; superposing the earth surface compensation factors of all earth surface types to obtain a work area compensation factor; acquiring work area profile data; performing convolution on the work area profile data and the work area compensation factor to obtain compensated work area profile data; and performing geological profile imaging on the work area according to the compensated work area profile data to obtain a geological profile map. According to the geological section imaging compensation method and system provided by the invention, the surface compensation factors are calculated for different surface types in the work area respectively, and the work area section data is compensated, so that the resolution ratio and the signal-to-noise ratio of geological section imaging are improved, and the accuracy of determining the position of a small oil reservoir is improved.
Description
technical field [0001] The invention relates to the field of geological exploration, in particular to a geological section imaging compensation method and system. Background technique [0002] At present, the exploration and development of oilfields has entered the middle and later stages, and the large and medium-sized oilfields have been developed. During exploration, only the remaining small oil reservoirs can be found. The characteristics of small oil reservoirs are thin, small, deep, and broken. The existing seismic data distinguish The rate is difficult to meet the resolution requirements of exploration geological targets (small reservoirs). Frequency extension technology is a very important technology used in fine exploration at present. The main method is to investigate the Q value of the near surface, analyze the absorption and attenuation results of the near surface, and calculate the Q value to compensate the seismic section to obtain the geological data. Profile...
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IPC IPC(8): G01V1/30
CPCG01V1/301
Inventor 曹国滨宋智强徐雷良赵国勇徐钰宁鹏鹏曹宇宁李伟高芦潞姜海波
Owner 中石化石油工程技术服务有限公司