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A method for automatic optimization of undulating surface observation system

A technology of undulating surface and observation system, applied in the field of exploration seismic data acquisition, can solve problems such as unresolved and uneven element attributes at the target level, and achieve the effect of uniform surface element attributes and elimination of surface element attribute inhomogeneity.

Active Publication Date: 2015-11-18
CHINA PETROLEUM & CHEM CORP +1
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  • Application Information

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Problems solved by technology

So up to now, no one has proposed to solve the problem of uneven meta-attributes of the target layer caused by the undulating surface, and there is no technical solution to solve this problem.

Method used

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  • A method for automatic optimization of undulating surface observation system
  • A method for automatic optimization of undulating surface observation system
  • A method for automatic optimization of undulating surface observation system

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Embodiment Construction

[0029] Due to the impact of the undulating surface, the use of conventional observation systems has the problem of uneven CDP bin attributes, such as figure 1 As shown, due to the fluctuation of the surface, the CMP point does not coincide with the CDP point, and the observation system based on CMP uniformity cannot make the CDP bin attributes uniform. The common center point of the shot point and the receiver point is at the CMP. However, according to the ray theory of elastic wave propagation, the reflection point of the actual ray on the target layer is at the CDP. To make the CPD and CMP coincide, the shot point must be moved to S* . S* represents the ideal shot point position, where CMP and CDP coincide.

[0030] figure 2 It is a schematic diagram of the optimization of a single shot point and a single receiver point, and the process of an optimization calculation is shown in the figure. S* is the theoretically optimal shot point position. Due to the undulating surfac...

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Abstract

The invention relates to an optimization method for an undulating surface observation system. By means of obtaining an ideal place of a shot point of each receiving point and then obtaining an error between a capillary melting point (CMP) and a critical decision point (CDP) of each receiving point, the automatic optimization method for the undulating surface observation system minimizes the error in general (statistics) and achieves a goal of the automatic optimization through iteration so as to eliminates the nonuniformity of the attribution of the CDP surface element caused by the undulating surface to a large extent.

Description

technical field [0001] The invention belongs to the field of seismic data acquisition for exploration, and especially provides an automatic shot point optimization scheme for the CMP offset problem caused by undulating ground surface in the design of an observation system for seismic exploration. Background technique [0002] Observation system design is a necessary step in seismic data acquisition and the construction basis for field seismic data acquisition. But for a long time, due to technical limitations, the conventional observation system design assumes a horizontal surface and a horizontal medium. With the deepening of exploration, there are fewer and fewer exploration areas with flat surfaces, and more and more complex surfaces and substantially undulating surfaces. [0003] Among them, CMP-common central point, the design of conventional seismic observation system is based on the premise of horizontal surface and horizontal underground medium. When doing bin attri...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36
Inventor 殷厚成王龙泉
Owner CHINA PETROLEUM & CHEM CORP