A method and device for evaluating an observation system based on seismic attributes
A seismic attribute and observation system technology, applied in the field of oil exploration, can solve problems that are rarely used, achieve the effect of reducing the acquisition footprint and improving the acquisition effect
Active Publication Date: 2016-03-09
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0008] At present, most oilfields are highly mature areas for exploration and development, which are basically covered by 3D, and have rich 2D and 3D seismic data, but these data are often rarely used in the actual acquisition design process
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Embodiment
[0102] The steps of this embodiment include:
[0103] Step 1): Collect the existing original data in the exploration area;
[0104] Step 2): Two observation systems are designed according to the geological tasks in the exploration area, such as Figure 5 with Image 6 , Figure 5 It is a 12-line, 4-shot, 120-channel orthogonal observation system 1 with 90 coverage times and a maximum offset of 3199m. Image 6 It is an orthogonal observation system 2 with 12 lines, 24 shots and 120 channels, the number of coverage is 90 times, and the maximum offset is 3414m. The designed observation system is simulated to shoot, and the offset distribution of each bin in the observation system is obtained;
[0105] Step 3): The exploration area is a plain, and the shot sets that can represent the characteristics of the entire work area are selected from the original data. Such as Figure 7 As shown, it is a schematic diagram of the shot collection records selected from the original data t...
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The invention provides an observing system evaluation method and device based on seismic attributes. The evaluation method comprises the steps that an observing system is designed and blasting is simulated according to a geological task of an exploratory area, and shot-geophone distance distribution of each surface element of the observing system is obtained; a shot gather record representing characteristics of the exploratory area is selected; a seismic reflected wave time window is selected on the shot gather record; seismic attribute values of seismic data in the shot gather record in the seismic reflected wave time window are calculated; shot-geophone distance fitting is carried out on the seismic attribute values to get a seismic attribute fitting expression; the seismic attribute value of each surface element is obtained according to the seismic attribute fitting expression; the standard deviation of seismic attribute value distribution of the observing system is obtained according to the seismic attribute values of the surface elements; the observing system is evaluated according to the standard deviation of the seismic attribute value distribution of the observing system; it is indicated that the smaller the standard deviation is, the better the seismic surface element attribute of the observing system is.
Description
technical field [0001] The invention relates to the field of petroleum exploration, in particular to an evaluation method and device for an observation system based on seismic attributes. Background technique [0002] Seismic exploration is an important means of oil exploration. The technical design of seismic data exploration and acquisition is the work of method demonstration and technical analysis to ensure the geological tasks, technical requirements, and exploration time requirements proposed by the geological exploration design of the exploration area. Its main contents include the source of exploration missions, collection of past data in the exploration area, analysis of the situation in the exploration area, exploration difficulties and technical countermeasures, acquisition method design and observation system scheme, etc. Whether the design of the observation system is reasonable is the key factor affecting the effect of seismic exploration, so how to evaluate th...
Claims
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IPC IPC(8): G01V13/00
Inventor 许银坡邹雪峰詹仕凡李培明蒋先艺杨剑宋卫锋于香妮
Owner BC P INC CHINA NAT PETROLEUM CORP