Method and device for constructing well-seismic combined velocity field
A technology of well-seismic combination and construction method, applied in measurement devices, seismology, seismic signal processing, etc., can solve problems such as low velocity accuracy, inability to effectively use multi-well information and seismic velocity information, and difficulty in obtaining structural maps.
Active Publication Date: 2018-09-25
BC P INC CHINA NAT PETROLEUM CORP +1
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The above two methods have their own disadvantages. The former cannot effectively use multi-well information and seismic velocity information, and the velocity accuracy is very low in the section far away from the constrained well; the latter only uses the average seismic velocity to construct the velocity field. There are many influencing factors, and the accuracy is low, so it is difficult to obtain an accurate structural map
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[0020] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the present invention as defined by the claims and their equivalents. The following description with reference to the accompanying drawings includes various specific details to assist in understanding, but the specific details are to be regarded as examples only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.
[0021] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should b...
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The invention discloses a well-to-seismic integration velocity field construction method and device. The well-to-seismic integration velocity field construction method comprises the following steps that (A) seismic stack velocity of each time point on the common depth point (CDP) gather is converted into first stratum velocity of each time point through a generalized Dix formula algorithm; (B) the correction coefficient of each time point is acquired by using logging information and the first stratum velocity of each time point; and (C) the correction coefficient of each time point is multiplied with the first stratum velocity of each time point so that well-to-seismic integration velocity of each time point is acquired.
Description
technical field [0001] The invention relates to the field of seismic data processing, and more specifically, relates to a method for constructing a well-seismic joint velocity field by combining seismic velocity and well point velocity. Background technique [0002] At present, there are two commonly used methods for constructing the velocity field in complex areas: one is to use the drilling depth to convert the average velocity, and then construct the velocity field according to the variation trend of velocity with depth; the other is to construct the velocity field using the velocity obtained by converting the velocity spectrum. The above two methods have their own disadvantages. The former cannot effectively use multi-well information and seismic velocity information, and the velocity accuracy is very low in the section far away from the constrained well; the latter only uses the average seismic velocity to construct the velocity field. There are many influencing factors...
Claims
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IPC IPC(8): G01V1/30
CPCG01V1/303G01V2210/6222
Inventor 陈小二巫芙蓉邹文范昆庞崇友唐浩刘璞孙甫徐敏龚宇飞
Owner BC P INC CHINA NAT PETROLEUM CORP