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Microseismic wave monitoring method and system based on steam-assisted gravity oil drainage

A technology to assist gravity and microseismic waves, which is applied in the field of oil and gas geophysical surveys and earthquakes, can solve the problems of difficulty in acquiring seismic wave signals, microseismic effects or being shielded, and uncertainty of earthquake occurrence time, so as to achieve convenient and accurate data processing, reduce interference, The effect of improving the accuracy of event location

Active Publication Date: 2017-06-20
克拉玛依市海晟达石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: for heavy oil reservoirs, the microseisms generated in steam-assisted gravity drainage production are easily affected or shielded by the surrounding noise, and at the same time, these microseisms have small magnitude and uncertain time of occurrence , it is difficult to obtain effective seismic wave signals

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  • Microseismic wave monitoring method and system based on steam-assisted gravity oil drainage

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Embodiment 1

[0058] Such as figure 1 Shown, a kind of micro-seismic monitoring method based on steam-assisted gravity drainage of the present invention, the method comprises the following steps:

[0059] S1, according to the monitoring requirements, obtain the existing geological and production data in the work area, divide the monitoring area, and establish a monitoring network model, wherein preferably, the monitoring area is uniformly divided into grids;

[0060] S2, according to the monitoring network model, calibrate the layout position of each geophone, and arrange geophones in the well and on the ground, such as figure 2 As shown, the monitoring sub-station 1 and the central processing station 2 are arranged on the ground at the same time. After the monitoring sub-station 1 and the central processing station 2 are arranged, the micro-seismic wave signal is comprehensively detected;

[0061] Wherein the specific steps in S2 are:

[0062] S21, performing fracture development simula...

Embodiment 2

[0120] The present invention also relates to a microseismic wave monitoring system based on steam-assisted gravity drainage. The system includes: the system includes: a surface monitoring module and an underground monitoring module;

[0121] The ground monitoring module is used to receive and process the microseismic signal data transmitted to the ground in the steam injection formation; the downhole monitoring module is used to receive and process the microseismic signal data transmitted to the ground in the steam injection formation; Both the ground monitoring module and the downhole monitoring module include: a geophone, and the geophone is used to detect micro-seismic signals, and transmit the detected micro-seismic signals to the ground monitoring module; the ground monitoring module also includes: a monitoring substation , central processing station 2; described geophone, monitoring substation 1, central processing station 2 are connected successively; described geophone ...

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Abstract

The invention relates to a microseismic wave monitoring method and system based on steam-assisted gravity oil drainage, and the method comprises the steps: arranging a detection device nearby a monitoring region, and starting the detection of a microseismic event; enabling a microseismic signal to be processed initially in an automatic manner after a monitoring substation receives the microseismic signal, and then transmitting the microseismic signal to a central processing station; enabling the central processing station to carry out the analysis and calculation of the data, and obtaining the spatial and time distribution data of the microseismic fracture energy; explaining the occurrence time, spatial distribution and size of the fracture, and determining the distribution range and occurrence time and time of a steam cavity. The invention also relates to a system, and the system comprises a ground monitoring module and an underground monitoring module. The ground monitoring module and the underground monitoring module are respectively used for receiving and processing the microseismic signal data received on the ground and in the observation well. According to the invention, the method effectively improves the event positioning precision under the complex stratum conditions. A microseismic monitoring positioning terminal is simple and reasonable in structural design, and can achieve the real-time and continuous monitoring of the microseismic signal.

Description

technical field [0001] The invention relates to the technical field of oil and gas geophysical survey seismic, in particular to a microseismic wave monitoring method and system based on steam-assisted gravity drainage. Background technique [0002] Steam-assisted gravity drainage (Steam Assisted Gravity Drainage, SAGD) technology is a cutting-edge technology for the development of super-heavy oil. The side expands to exchange heat with the crude oil in the oil layer, and the heated crude oil and water condensed by steam are discharged to the horizontal production well below for production by gravity. [0003] During the process of steam injection, steam conduction and steam chamber expansion, due to the thermal-induced Kasai effect of the rock, the steam injection process will cause stress concentration and strain energy to increase around the original or newly created cracks in the rock. When the external force increases To a certain extent, the area where the original cra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/30G01V1/36G01V1/20
CPCG01V1/20G01V1/282G01V1/288G01V1/307G01V1/364G01V2210/324G01V2210/63G01V2210/65
Inventor 崔海鹰
Owner 克拉玛依市海晟达石油科技有限公司
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