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In-situ stress measurement data acquisition system by hydraulic fracturing method

A data acquisition system and stress measurement technology, applied in measurement, fluid extraction, earthwork drilling, etc., can solve the problems of errors, large noise in the recording curve, limited recording speed and range, etc., and achieve stable acquisition signals, smooth transmission, and noise. small effect

Active Publication Date: 2016-05-25
NAT INST OF NATURAL HAZARDS MINISTRY OF EMERGENCY MANAGEMENT OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) The form recorder can only record two signals, and the recording speed and range are limited. It is difficult to use, maintain and upgrade the recorder
[0008] (2) The early computer fast data acquisition recorder system can only record two signals, and the signals are affected by the site generator signal and the AC pulse signal, the recording curve noise is very large, and the collected signal is very unstable, which leads to The curve data processing process will produce large errors, and cause great difficulties to the automatic analysis and processing of the recorded data in the later stage

Method used

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  • In-situ stress measurement data acquisition system by hydraulic fracturing method
  • In-situ stress measurement data acquisition system by hydraulic fracturing method
  • In-situ stress measurement data acquisition system by hydraulic fracturing method

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Embodiment Construction

[0027] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0028] Please refer to figure 2 , is a functional block diagram of the data acquisition system of the present invention. The data acquisition system includes a housing and a circuit board installed in the housing. The circuit board includes a system power supply module, an overload detection module, an input module, a preamplifier module, a low-pass filter module, a high-pass filter module, and a data collector module. , Output module.

[0029] (1) System power module

[0030] The power supply module of this system is equipped with an AC power supply and a DC power supply selection switch, and can choose to use 220V AC power supply or 12V DC power supply for power supply. Moreover, there is also a transformer module inside the power module, including a power transformer, a rectifier circuit, a filter circuit and a voltage ...

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Abstract

The invention discloses a system for collecting in-situ stress measurement data by using hydraulic fracturing. Test section pressure data, packer monitoring pressure data and test section flow data can be simultaneously collected in the process of in-situ stress measurement by using the hydraulic fracturing, the collecting frequency of the system can reach 5-10Hz, and therefore smooth and steady transmission of data collection is achieved.

Description

technical field [0001] The invention relates to a hydraulic fracturing method in-situ stress measurement data collection system, which is mainly used for data recording and collection of pressure signals and flow signals during the hydraulic fracturing method testing process. Background technique [0002] In-situ stress measurement is a basic mechanical parameter for measuring the physical mechanism behind solid geophysical phenomena. It is widely used in geological engineering such as underground tunnels, railways, highways, mining engineering surrounding rocks, high slopes, and rock and soil excavation. Accurate spatial-temporal distribution characteristics and laws of in-situ stress are the basis for analyzing solid geophysical problems, and are also a necessary prerequisite for stability research and design analysis of geological engineering problems and scientific decision-making in geotechnical engineering. The study of stress field has important scientific significanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/12E21B43/26E21B47/00
Inventor 王成虎王显军包林海毛吉震邢博瑞
Owner NAT INST OF NATURAL HAZARDS MINISTRY OF EMERGENCY MANAGEMENT OF CHINA
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