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Microseismic positioning technology based on reverse-time ray tracing method

A ray tracing and microseismic technology, applied in positioning, seismology, seismic signal processing, etc., can solve the problem of low efficiency in the global optimization process, and achieve the effects of improving efficiency, reliability, and computing efficiency

Active Publication Date: 2018-08-17
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This type of positioning method requires multiple iterations, and the efficiency of the global optimization process is low

Method used

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  • Microseismic positioning technology based on reverse-time ray tracing method
  • Microseismic positioning technology based on reverse-time ray tracing method
  • Microseismic positioning technology based on reverse-time ray tracing method

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Embodiment

[0091] Such as figure 2 As shown, it is a schematic diagram of the actual displacement record and station location distribution proposed by the embodiment of the present invention. Used to illustrate the three-component displacement record and station location distribution used in this embodiment, the black triangle refers to the location of the station, "station one", "station two", "station three" and "station four " refers to the number of the observation station in this embodiment. Such as image 3 As shown, it is a schematic diagram of the first half-period waveform of the first-arrival P-wave seismic phase selected by Station 1 proposed in the embodiment of the present invention, and the curve in the black dashed box is a schematic diagram of the first 1 / 2 cycle waveform of the selected first-arrival P-wave seismic phase. Component displacement records include due north, due east and vertical displacement records. Such as Figure 4 As shown, it is a schematic diagra...

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Abstract

The present invention belongs to the technical field of exploration and development of oil and gas, and discloses a microseismic positioning technology based on a reverse-time ray tracing method. Thereal-time scheme of the concrete technology comprises the steps of: (1) constructing a three-dimensional longitudinal wave velocity model; (2) extracting initial longitudinal wave ray vector; (3) solving the longitudinal wave ray path with reverse transmission of each wave detector; and (4) performing calculation and selection of position of a seismic source. The method is fast in computing speed,can rapidly determine a microseismic seismic source area, is high in location efficiency and easy to determine the microseismic space position, and can rapidly determine the real microseismic seismicsource.

Description

technical field [0001] The invention belongs to the technical field of petroleum geophysical exploration and development, and in particular relates to a microseismic positioning technology based on a reverse time ray tracing method. Background technique [0002] Microseismic monitoring is widely used in dynamic monitoring of hydraulic fracturing to guide the development of oil and gas fields. As an important monitoring method, it is also used in reservoir-induced earthquake monitoring and mine dynamic disaster monitoring to monitor reservoir areas after water storage and mine mining. (Micro) seismic activity characteristics, in order to evaluate the stability of geological bodies, prevent geological disasters, and reduce personnel and property losses. Microseismic source location is an important part of microseismic monitoring, which provides very important information for seismological research, and also provides a basis for the evaluation of oil and gas field hydraulic fra...

Claims

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Application Information

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IPC IPC(8): G01S5/22G01V1/30
CPCG01S5/22G01V1/30G01V2210/65
Inventor 丁亮高尔根钱卫檀文慧吴春芳
Owner HOHAI UNIV
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