Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and system for evaluating the quality of microseismic events in wells

A quality evaluation and micro-seismic technology, applied in seismology, seismic signal processing, geophysical measurement, etc., can solve the problems of reducing processing efficiency, heavy manual interaction workload, affecting work efficiency, etc., to improve processing efficiency and reduce manual The effect of interworking

Active Publication Date: 2021-04-02
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to ensure the accuracy of the monitoring effect, the actual monitoring data processing requires more manual interactive quality control, which reduces the processing efficiency
Taking the actual data processing in a well in a work area as an example, 3027 events were automatically identified, and 1126 of them were found to be invalid events through manual interactive inspection. The workload of manual interaction during on-site processing is relatively large, which affects work efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for evaluating the quality of microseismic events in wells
  • Method and system for evaluating the quality of microseismic events in wells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0042] According to the microseismic event quality evaluation method in the well of the present invention, comprising:

[0043] Based on the seismic trace, identify the first wave of the seismic trace, and then obtain multiple microseismic events;

[0044] Seismic phase separation is performed on each microseismic event to obtain the PS wave signal-to-noise ratio of each microseismic event;

[0045] Set the reference trace number threshold and signal-to-noise ratio threshold for microseismic events;

[0046] The quality evaluation coefficient of each microseismic event is obtained based on the trace number of each microseismic event, the PS wave signal-to-noise ratio, the reference trace number threshold and the signal-to-noise ratio threshold.

[0047] The microseismic event quality evaluation method in the well can quickly evaluate the quality of microseismic events to achieve the effect of rapid quality control. It can greatly reduce manual interactive work, improve proce...

Embodiment approach 2

[0065] The microseismic event quality evaluation system in a well according to the present invention includes:

[0066] a memory storing computer-executable instructions;

[0067] a processor, the processor runs the computer-executable instructions in the memory, and performs the following steps:

[0068] Based on the seismic trace, identify the first wave of the seismic trace, and then obtain multiple microseismic events;

[0069] Seismic phase separation is performed on each microseismic event to obtain the PS wave signal-to-noise ratio of each microseismic event;

[0070] Set the reference trace number threshold and signal-to-noise ratio threshold for microseismic events;

[0071] The quality evaluation coefficient of each microseismic event is obtained based on the trace number of each microseismic event, the PS wave signal-to-noise ratio, the reference trace number threshold and the signal-to-noise ratio threshold.

[0072] As a preferred solution, the identification o...

Embodiment

[0081] figure 1 A flow chart of a method for evaluating the quality of microseismic events in a well according to an embodiment of the present invention is shown. figure 2 A schematic diagram of the application of the method for evaluating the quality of microseismic events in a well according to an embodiment of the present invention is shown.

[0082] Such as Figure 1-2 As shown, the actual test is carried out with the monitoring data of the Heshun coalbed methane well, and the quality evaluation methods of the microseismic events in the well include:

[0083] Based on the seismic trace, identify the first wave of the seismic trace, and then obtain multiple microseismic events;

[0084] Seismic phase separation is performed on each microseismic event to obtain the PS wave signal-to-noise ratio of each microseismic event;

[0085] There are a total of 16 three-component detectors. Through analysis, it is determined that the reference channel number threshold is 12 channe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a borehole microseismic event equality evaluation method and system. The borehole microseismic event equality evaluation method comprises the following steps: based on a seismic channel, identifying a preliminary wave of the seismic channel, thereby acquiring multiple microseismic events; performing seismic phase separation on each microseismic event, and acquiring a PS wave signal to noise ratio of each microseismic event; setting a standard channel number threshold value and a signal to noise ratio threshold value for the microseismic events; based on a channel numberand the PS wave signal to noise ratio of each microseismic event, the standard channel number threshold value and the signal to noise ratio threshold value, acquiring a quality evaluation coefficientof each microseismic event. The method is capable of rapidly evaluating quality of the borehole microseismic event, greatly reducing human interaction work, and improving processing efficiency.

Description

technical field [0001] The invention belongs to the field of exploration and development of unconventional oil and gas such as shale gas and coalbed methane, and more specifically relates to a method and system for evaluating the quality of microseismic events in wells. Background technique [0002] Microseismic monitoring technology has now become a commonly used monitoring technology in the development of oil and gas fields in tight reservoirs. Through the processing of detection signals, the analysis of fracture changes in the process of fracturing and oil and gas development can be used to dynamically evaluate the effect of reservoir stimulation. Provide technical support for unconventional oil and gas development. [0003] In order to ensure the accuracy of the monitoring effect, the actual monitoring data processing requires more manual interactive quality control, which reduces the processing efficiency. Taking the actual data processing in a well in a work area as a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28G01V1/30
CPCG01V1/288G01V1/307G01V2210/1234G01V2210/63
Inventor 赵德明庞锐
Owner CHINA PETROLEUM & CHEM CORP