Method for performing hydraulic-fracturing microseismic monitoring by utilizing uphole geophones

A micro-seismic and geophone technology, applied in the field of geophysical exploration, can solve the problems of cumbersome construction and complex structure, and achieve the effect of simple construction

Active Publication Date: 2014-12-17
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The installation requires a strong anchor arm to realize the mechanical coupling between the accelerometer geophone and the casing or formation in the casing, the structure is complex and the construction is cumbersome

Method used

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  • Method for performing hydraulic-fracturing microseismic monitoring by utilizing uphole geophones
  • Method for performing hydraulic-fracturing microseismic monitoring by utilizing uphole geophones
  • Method for performing hydraulic-fracturing microseismic monitoring by utilizing uphole geophones

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Embodiment Construction

[0034] The present invention is realized through the following specific implementation steps:

[0035] 1) When high-pressure water is used to fracturing low-permeability reservoirs and shale reservoirs, underground rocks are ruptured under high-pressure hydraulic action, and microseismic signals are generated1;

[0036] 2) Install a three-component analog or digital geophone (5, 6, 7) on the wellhead casings of three or more monitoring wells (2, 3, 4) randomly selected around the hydraulic fracturing well. The ring collar of the fastening bolt firmly fixes each three-component geophone on the outside of the wellhead casing. A three-component geophone is installed at the wellhead to collect and record micro-seismic signals (1) generated when underground rocks rupture under high-pressure hydraulic action in real time;

[0037] 3) The vehicle-mounted or ground seismic data acquisition system (8) records the micro-seismic signals (1) generated when underground rocks rupture under...

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Abstract

The invention relates to a method for performing hydraulic-fracturing microseismic monitoring by utilizing uphole geophones and applying geophysical prospecting. The geophones are mounted on hydraulic-fracturing uphole casings, micro-seismic signals generated by underground rock under the high-pressure hydraulic action during fracturing are recorded, and micro-seismic signal waves are transmitted to the casings along the horizontal direction to be converted into sound waves which are transmitted along the steel casings to be recorded by the uphole geophones. By the method, geometric position coordinates of underground rock failure points can be determined rapidly and accurately on a fracturing construction site, and the method and device simple in construction can be applied to dynamic imaging and rapid post-fracturing assessment of hydraulically created fractures of low permeability reservoirs and shale reservoirs of oil fields.

Description

[0001] Involved areas [0002] The invention relates to the application of geophysical exploration method technology, which is a method for microseismic monitoring of hydraulic fracturing by using three or more wellhead three-component geophones. Background technique [0003] Microseismic monitoring technology is a new technology used in the development stage of oil and gas fields that has emerged in recent years. It is a geophysical technology that monitors the impact, effect and underground state of production activities by observing and analyzing small seismic events generated during production activities. The basic method is to receive microseismic events generated or induced by oil and gas production activities by arranging geophones in the well or on the ground; and obtain parameters such as the source location of microseismic events through the inversion of these events; finally, through these parameters Production activities are monitored or directed. [0004] At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/28
CPCG01S5/28G01V1/20
Inventor 余刚王熙明
Owner BC P INC CHINA NAT PETROLEUM CORP
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