Earthquake attribute clustering method and device
A technology of seismic attributes and clustering methods, applied in the field of geophysical exploration, can solve problems such as not being able to well display the distribution of reservoirs in intervals
Active Publication Date: 2018-08-10
PETROCHINA CO LTD
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[0006] The present invention provides a seismic attribute clustering method and device to at least solve the problem that the existing layer-based clustering technology cannot well display the distribution of reservoirs in layers
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[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.
[0032] At present, most studies focus on the multi-attribute cluster analysis of points on the horizon plane. The change of any physical parameter of the sedimentary strata is always reflected in the change of the waveform shape of the seismic trace. The classification of the waveform shape of the seismic trace represents the real seismic signal. horizontal exception. Within a certain time window range, the waveform characteristics of the same dest...
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The invention discloses a seismic attribute clustering method and a seismic attribute clustering device. The method comprises the following steps: determining the band clustering mode, clustering parameters, initial horizon, horizon offset and the size of a sliding time window, wherein the sliding time window refers to the number of sample points contained between two adjacent peaks or two adjacent valleys of a waveform graph of a horizon section to be researched, the number of horizons above the initial horizon is at least equal to half the sliding time window, and the number of horizons below a termination horizon is at least equal to half the sliding time window; using the sliding time window to cluster the seismic attribute data of the horizon section to be researched, and determining the category to which the sample points in each horizon belong; and unifying the clustering results of adjacent horizons according to the spatial similarity, and starting from the horizon below the initial horizon, adjusting the clustering result of each horizon according to the clustering result of the adjacent upper horizon. Multi-attribute clustering analysis is made based on upper and lower band information of the points on the horizon surface, and the clustering results are unified. Reservoir distribution in a horizon section can be showed globally.
Description
technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a seismic attribute clustering method and device. Background technique [0002] In oil and gas exploration, only after a full understanding and familiarity with the underground geological conditions can we make a judgment on the oil and gas storage conditions in the exploration area. An important means of obtaining geological information is to analyze various seismic attribute data obtained after mathematical transformation of seismic data. Seismic attribute data are usually pre-stack or post-stack seismic data, parameters such as geometric shape, kinematic characteristics, and dynamic characteristics of seismic waves. Through the study of these parameters, the structure, lithology, fluid and other characteristics of the underground medium in the exploration area can be obtained, and then the oil and gas storage information can be inferred. The process of inferr...
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IPC IPC(8): G01V1/30
Inventor 吴清强郑晓东张研李劲松张杨昊
Owner PETROCHINA CO LTD