Fault solution identification method and device based on stratum structure information separation
A technology of structural information and solution, applied in the field of oil and gas geophysical exploration, can solve problems such as difficult to identify the boundary and scale of fault-karst body
Pending Publication Date: 2021-04-13
CHINA PETROLEUM & CHEM CORP +1
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[0005] Aiming at the current problem that it is difficult to identify the boundaries and scales of fault-karst bodies based on seismic data, this application proposes a fault-karst body identification method based on the separation of seismic structure information
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[0031] Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of this application to those skilled in the art.
[0032] See figure 1 . figure 1 A flowchart showing a fault-karst identification method based on stratum structure information separation according to an embodiment of the present application. As shown in the figure, the method includes the following steps 101-106.
[0033] Step 101, establishing a fault-karst body seismic geological model.
[0034] The seismic geological model of fault-karst body can be established by numerical sim...
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The invention discloses a fault solution identification method and device based on stratum structure information separation. The fault solution identification method comprises the following steps of: establishing a fault solution seismic geologic model; acquiring a forward modeling migration profile of the fault solution seismic geologic model; decomposing each seismic trace of the forward modeling migration profile into a plurality of wavelets with different frequencies; sorting the plurality of wavelets with different frequencies according to the total energy; comparing the seismic geologic model of the fault solution with the superposed sections of the wavelets with different frequencies, and determining the wavelet frequency representing the reflection characteristics of the fault solution; and extracting wavelets corresponding to the wavelet frequencies representing the reflection characteristics of the fault solution from the actual fault solution seismic data so as to carry out fault solution identification. According to the fault solution identification method and the device, the purposes of suppressing or eliminating the impact on the seismic information of the fault solution from the seismic information and noise of a stratum structure, highlighting the boundary information of the fault solution, and recognizing the boundary and scale of the fault solution through a conventional seismic attribute method can be realized.
Description
technical field [0001] The invention belongs to the field of oil and gas geophysical exploration, and more specifically relates to a fault-karst body identification method based on stratum structure information separation and a fault-karst body identification device based on stratum structure information separation. Background technique [0002] Taking the Shunbei oil and gas field as an example, it is composed of a series of carbonate rock fault-karst reservoirs distributed along the fault zone with a burial depth greater than 7000 m. It has the characteristics of overall oil-bearing and uneven enrichment along the fault zone. The Shunbei oil and gas field is overlaid with huge thick Qierqioke Formation mudstone as the regional sealing layer; the brittle carbonate rocks of the Lower Paleozoic formed the broken zone during the multi-stage activity of strike-slip faults, and the caves formed by the later reformation Small faults, fractures, and dissolved pores and caves along...
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IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 马灵伟肖鹏飞李弘李京南吕慧
Owner CHINA PETROLEUM & CHEM CORP