Water pressure cracking in-situ stress measurement wireless automatic well logging system

Abstract

The invention provides a water pressure cracking in-situ stress measurement wireless automatic well logging system. The water pressure cracking in-situ stress measurement wireless automatic well logging system comprises a stress measurement probe A, a directional probe B, a pressure flow sensing and control unit C, a water source and pressure channel and user-side intelligent equipment; the stressmeasurement probe A is used for performing drill hole pressing crack and recording water pressure of a drill hole pressing crack section during pressing crack; the directional probe B is used for performing moulage orientation for a cracked crack of rock in a drill hole; the pressure flow sensing and control unit C is used for generating the water pressure and providing the water pressure for thestress measurement probe A or the directional probe B; the water source and pressure channel is arranged between the pressure flow sensing and control unit C and the stress measurement probe A or thedirectional probe B and is used for outputting the water pressure to the stress measurement probe A and the directional probe B; and the user-side intelligent equipment is used for carrying out datatransmission and reception storage among the stress measurement probe A, the directional probe B and the pressure flow sensing and control unit C in a wireless mode. According to the water pressure cracking in-situ stress measurement wireless automatic well logging system, the whole measurement process is safe, efficient, convenient and fast; and in addition, due to the fact that a downhole pressure sensor is used, the measurement is enabled to be more accurate.

Description

technical field [0001] The invention relates to wireless bluetooth, automatic measurement, ultra-low power consumption electronic technology, and mechanical sealing structure, in particular to a wireless automatic well logging system for in-situ stress measurement of hydraulic fracturing. Background technique [0002] In geophysics, geodesy, and engineering investigation, hydraulic fracturing is often used to measure the in-situ stress state of rock mass. During the measurement, first drill a hole in the part of the earth’s crust to be measured, then lower the measuring probe to the hole section to be measured, and then use a high-pressure water pump to pressurize the drilling measurement section until the rock breaks under the action of water pressure, then stop pressing and turn off the water source , to maintain water pressure. At this time, as the water flow overflows from the fracture, the water pressure gradually decreases, and the fracture surface is closed again und...

AI Technical Summary

Problems solved by technology

In such an environment, purely mechanical and high-reliability equipment such as hydraulic fracturing and fracturing probes, drill pipes, high-pressure water pumps, and stampers will not be affected, but equipment such as AD collectors, notebook computers, orienter electronic circuits, and pressure sensors will not be affected. And other electronic equipment, used in the above-mentioned environment, is easy to get wet, wet, or even damaged, and the operation of connecting, setting, shielding, sealing and other operations on the electronic circuit on site also affects the work

Images