Microseism simulating and monitoring method

A technology of micro-seismic and simulation experiments, applied in seismology, geophysical measurement, seismic signal recording, etc., can solve the problems of low precision and low simulation accuracy, improve the signal-to-noise ratio, improve the ability to eliminate noise, and improve The effect of testing quality

Active Publication Date: 2014-01-15
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

These data can be used for the research and analysis of fracture morphology and to guide field 3D microseismic exploration, solving the problems of low simulation accuracy and precision in conventional microseismic simulation monitoring methods

Method used

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  • Microseism simulating and monitoring method
  • Microseism simulating and monitoring method
  • Microseism simulating and monitoring method

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Embodiment Construction

[0071] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0072] The principle diagram of the micro-seismic simulation monitoring method of the present invention is as image 3 As shown, because the model is a cube or a cuboid with a square cross section, the sensors laid on the surface of the model should be laid on one surface, that is, there are multiple rows, but image 3 Only 6 sensors are given as an illustration, and various sensor arrangements such as 2x8 and 4x4 can be used for actual detection. The working process of the system is briefly described as follows: the fracturing fluid is pressurized and injected into the model under test, and the micro-seismic signal detection device is activated at the same time. When the pressure reaches the crack initiation pressure, a crack occurs. When a crack is generated, a micro-seismic sound wave signal is transmitted to the surroundings. The sensor group laid on the surface ...

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Abstract

The invention provides a microseism simulating and monitoring method and belongs to the micro-vibration generation and detection field. The method comprises the steps of pressurizing a fracturing fluid and injecting the fracturing fluid into a model to be detected; cracking the inside of the model to be detected by utilization of the fracturing fluid, wherein microseism signals are generated when cracks are produced; detecting the microseism signals via an accelerometer disposed on the surface of the model to be detected and also a laser doppler vibration meter disposed above the surface of the model to be detected and converting the signals into voltage signals; converting the voltage signals into digital signals; and finally storing, calculating and analyzing the digital signals by a computer to obtain information of the cracks. Through the method, microseism signals can be generated indoors through a micro-fracturing way and can be monitored, and water fracturing of field oil and gas wells and a three-dimensional microseism monitoring process can be simulated.

Description

technical field [0001] The invention belongs to the field of micro-vibration generation and detection, and specifically relates to a micro-seismic simulation monitoring method, which can use micro-fracturing to generate and detect micro-seismic signals under indoor conditions, and is used to simulate micro-seismic signals generated by water fracturing in oil and gas wells And the detection process of microseismic signals. Background technique [0002] At present, most large oil and gas fields in my country have entered the late stage of exploitation, and the oil and gas resources in low permeability oil and gas fields are expected to become the driving force of future energy and economic development, and the oil and gas in these tight reservoirs need to be fracturing to achieve economical extraction. Fracturing is to use pressure to open one or several horizontal or vertical fractures in the formation, and use proppant to support the fractures, reduce the flow resistance of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/133G01V1/16G01V1/24
Inventor 宗遐龄虞立王跃周中彪黄德娟
Owner CHINA PETROLEUM & CHEM CORP
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