Igneous rock top boundary seismic horizon tracking method and device
A layer tracking and igneous rock technology, applied in the field of geophysical exploration, can solve problems affecting drilling depth prediction and tracking, reducing drilling efficiency and success rate, and inconsistent seismic reflection characteristics
Pending Publication Date: 2021-02-02
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
[0003] However, due to the large composition of igneous rocks, complex volcanic structure, and strong heterogeneity, the thickness of igneous rocks varies regionally, and the seismic reflection characteristics of the top boundary are also inconsistent. The second to third continuous reflections at the bottom of Feixianguan The interface does not necessarily represent the top interface of igneous rocks. Once the identification is inaccurate, it will affect the prediction and tracking of subsequent drilling depths, greatly reducing drilling efficiency and success rate
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[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.
[0047] Such as figure 1 As shown, the present invention provides a method for tracking seismic horizons at the top of igneous rocks, including:
[0048] Step S101, performing trace-by-trace waveform scanning on the seismic trace data in the target area;
[0049] Step S102, scan the first track from the bottom of Feixianguan down to the time window of the preset time, compare the peak values before and after the scan sequence, and stop scanning if the curren...
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The invention provides an igneous rock top boundary seismic horizon tracking method and device. The method comprises the steps of conducting trace-by-trace waveform scanning on seismic trace data of atarget area, scanning a first time window from the bottom boundary of Feixianguan downwards to preset time, comparing front and back wave peak values according to a scanning sequence, stopping scanning when determining that the current wave peak amplitude is smaller than the preset amplitude of the previous wave peak amplitude, and tracking the previous wave peak, determining the duration from the bottom boundary of Feixianguan to the tracking wave peak as a first time window, and determining the duration from the tracking wave peak to the bottom wave peak of maokou formation as a remaining time window, and performing igneous rock top boundary seismic horizon tracking according to the correlation coefficients of the seismic waveforms in the first time window and the remaining time windowsand a preset correlation coefficient threshold.
Description
technical field [0001] The invention relates to geophysical exploration technology, in particular to a method and device for tracking seismic horizons at the top boundary of igneous rocks. Background technique [0002] At present, the exploration and development of Permian igneous rocks are in full swing, entering a stage of rapid development of exploration and development. A summary of existing technologies. The comparison and tracking of seismic horizons at the top boundary of igneous rocks on the seismic section mainly rely on the introduction of well-seismic calibration with fewer existing drilling layers, and refer to the relatively continuous seismic reflection at the bottom boundary of Feixianguan layer, identifying the 2-3 consecutive strong events downward. [0003] However, due to the large composition of igneous rocks, complex volcanic structure, and strong heterogeneity, the thickness of igneous rocks varies regionally, and the seismic reflection characteristics...
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Login to View More IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 徐姣邓绍强孙庆莉龚立杨晋蓉徐敏
Owner BC P INC CHINA NAT PETROLEUM CORP