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Location method and storage medium of microseismic events based on surface shallow well monitoring

A positioning method and micro-seismic technology, applied in the field of petroleum geophysical exploration, can solve problems such as insufficiency, achieve the effect of improving positioning accuracy and speeding up calculation efficiency

Active Publication Date: 2022-03-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0007] The surface shallow well microseismic monitoring method is a collection of surface monitoring and well monitoring in terms of monitoring methods. It adopts the three-component geophone mode in the well and receives records in the way of multi-site on the ground plane. It is a three-dimensional observation system. Therefore, the format of surface shallow well monitoring data is different from the previous two monitoring methods, and the existing surface and well positioning methods are not enough to reflect the advantages of surface shallow well monitoring methods

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  • Location method and storage medium of microseismic events based on surface shallow well monitoring
  • Location method and storage medium of microseismic events based on surface shallow well monitoring

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[0047] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve corresponding technical effects in the present invention. The embodiments of the present application and the various features in the embodiments can be combined with each other under the premise of no conflict, and the formed technical solutions are all within the protection scope of the present invention.

[0048] The method for locating microseismic events based on surface shallow well monitoring proposed by this application specifically includes the following steps:

[0049] first as figure 1 As shown in step S110, the monitoring records of micro-seismic events in the target work area are obtained by using the ground shallow well monitoring method.

[0050] The positioning method proposed in this...

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Abstract

The invention discloses a positioning method and a storage medium for microseismic events based on shallow well monitoring on the ground. The source scanning algorithm calculates the preliminary positioning information of the microseismic event; based on the preliminary positioning information, the secondary positioning information of the microseismic event is obtained through the three-dimensional travel time positioning method; the horizontal coordinates in the preliminary positioning information and the longitudinal coordinates in the secondary positioning information The combination is used as the source coordinates of microseismic events to realize the positioning of microseismic events. It is especially suitable for application scenarios where there are few observation points and the records are three-component records, which can efficiently realize positioning and improve the overall positioning accuracy.

Description

technical field [0001] The invention belongs to petroleum geophysical exploration technology, in particular to a positioning method and a storage medium for microseismic events based on surface shallow well monitoring. Background technique [0002] Microseismic fracturing monitoring technology has now become a commonly used monitoring technology in the development of oil and gas fields in tight reservoirs. At this stage, it is mainly based on well monitoring and surface monitoring. [0003] In-hole monitoring method: the geophone is located in the downhole, close to the fracturing fracture, the micro-seismic signal attenuation is small, the received micro-seismic signal is strong, the environmental noise interference is small, and the signal-to-noise ratio is high, but there are some limitations, such as downhole observation It is required that the geophone can adapt to the harsh environment underground, has high requirements for equipment, high cost, limited monitoring rang...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/36G01V1/28
CPCG01V1/362G01V1/284
Inventor 王瑜程磊磊郭全仕
Owner CHINA PETROLEUM & CHEM CORP
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