A 3D Seismic Identification Method for Point Bar Lateral Accretion Body
A three-dimensional seismic and identification method technology, applied in the field of petroleum exploration and development, can solve the problems of poor quality and large damage to seismic data information, and achieve the effects of better quality, clear seismic data, and improved prediction accuracy
Active Publication Date: 2021-06-01
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
[0004] The purpose of the present invention is to provide a three-dimensional seismic identification method for point bar lateral accretion bodies, which is used to solve the problems of large information damage and poor quality of seismic data of point bar lateral accretion bodies obtained in the prior art
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Embodiment 1
[0027] Embodiment 1 provides a method for three-dimensional seismic identification of point bar lateral accretion body, including the following steps:
[0028] Step S1: Set the target work area and its target horizon, and use the seismic data including the target horizon as input data.
[0029] Among them, the length of the target work area is 6.3km from north to south, 5.1km from east to west, and the area is about 32km 2 , the line number of seismic data is 1-631, and the track number is 1-511.
[0030] Step S2: applying the three-dimensional navigation pyramid method to decompose the seismic data in multiple scales and directions, and output the data volume of each sub-band.
[0031] Specifically, step S2 includes the following steps:
[0032] Step S21: Use the navigation pyramid algorithm, the core of which is to use the multi-scale and multi-directional analysis method to decompose the seismic signal into sub-band information of different scales containing different geo...
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The invention discloses a three-dimensional seismic identification method for a point bar lateral accretion body, which comprises the following steps: setting a target work area and its target layer section; applying a three-dimensional navigation pyramid method to decompose seismic data in multiple scales and directions and output subband body results; Perform well-seismic calibration and analyze the sensitivity of different sub-zone data bodies to the internal structure information of the point bar according to the results of the well-seismic calibration; select different sub-zone bodies to combine and superimpose to form a sub-zone body superposition body, etc. The 3D seismic identification method for point bar lateral accretion bodies disclosed by the present invention can more effectively highlight the internal structure information of point bar lateral accretion bodies, provide data guarantee for 3D seismic identification and characterization of point bar lateral accretion bodies, and further provide high-quality oil sand reservoirs. Provide support for spatial identification or prediction, and lay the foundation for the deployment of subsequent oil exploration and development plans.
Description
technical field [0001] The invention relates to the technical field of petroleum exploration and development, in particular to a three-dimensional seismic identification method for point bar lateral accretion bodies. Background technique [0002] The meandering river point bar sand body is a geological body composed of multi-stage sand bodies formed by the lateral accretion of the channel, and lateral accretion beds of mudstone deposits develop between the lateral accretion bodies. Due to concave bank erosion and convex bank deposition, the lateral accretion body usually tilts towards the direction of the development of the abandoned channel. As the lateral accretion of the channel proceeds again and again, the curvature of the channel further increases until the channel is cut and straightened, the channel is abandoned, and the lateral accretion stop, the dam development at this point ends. As the main body of meandering river deposits, point bars are the main oil storage ...
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IPC IPC(8): G01V1/30
CPCG01V1/301G01V2210/6169G01V2210/64G01V2210/74
Inventor 王晖高云峰赵鹏飞刘振坤郭晓王盘根于斌王宗俊张雨晴董洪超
Owner CHINA NAT OFFSHORE OIL CORP