High temperature and high pressure gas reservoir production capacity simulation device

High temperature and high pressure gas reservoir production capacity simulation deviceUsed to simulate underground reservoir environment(Triaxial pressure and temperature)By using hydraulic fracturing technology to construct artificial fractures, testing economically effective fracturing parameters, monitoring the geometric shape and distribution characteristics of hydraulic fractures (expandable acoustic waves), and conducting experimental research on liquid phase permeability, necessary technical support and basic scientific research data are provided for the development of artificial fractures in reservoirs; Simultaneously providing technical support for reservoir exploitation.

High temperature and high pressure gas reservoir production capacity simulation deviceIt is a model with broad application prospects, which can apply axial stress of different sizes in three axes, generate strain in the three axes, and simulate general stress and temperature conditions in field work. In order to apply axial stress in all three axes, a flat plate is used for loading. Compared to the sample, the three-dimensional loading plate can be regarded as a rigid plate. To ensure measurement accuracy, a high stiffness plate is selected for the loading plate to ensure that the deformation measurement of the sample is not affected during triaxial compression.The "true triaxial hydraulic fracturing device" is a new type of device that integrates true triaxial sample fracturing, seepage and other technologies, which better simulates the triaxial pressure situation of the formation and is closer to the geological site.

High temperature and high pressure gas reservoir production capacity simulation deviceIt has great flexibility and extensibility. Through this experiment, ideas can be expanded, imagination and creativity can be unleashed, and more and better simulation devices can be designed to develop and expand hydraulic fracturing stimulation experiments. It can provide assistance for the supporting experimental teaching of undergraduate experimental courses such as "Reservoir Transformation and Protection", "Oilfield Chemistry", "Drilling Fluid Technology", and "Principles of Enhanced Oil Recovery".

The shale reservoir triaxial stress flow simulation system can simulate the true temperature, pressure, and triaxial stress conditions of the formation, and achieve flow testing in various directions. It plays an important supporting role in simulating the anisotropy of reservoirs, evaluating the mechanism of fracture propagation, and assessing the fracture conductivity.

1、 Technical parameters

（1）Rock sample specifications for hydraulic fracturing:500mm×500mm×500mm

400mm×400mm×400mm

300mm×300mm×300mm

（2）Triaxial stress:80MPa

（3）Fracturing fluid displacement:0-100ml/min

（4）Fracturing and fracturing:0-80MPa

（5）Capacity simulation of large rock core:500mm×500mm×500mm

400mm×400mm×400mm

300mm×300mm×300mm

（6）Core clamp confining pressure:100MPa

（7）Control range of back pressure at core outlet0-80MPa

（8）Temperature control range: room temperature-180℃

（9）Power supply: AC380V

（10）Power:30KW

2、 The structural composition of the device

The device consists of a liquid injection system, a gas injection system, a large-scale true triaxial fracturing model, a triaxial stress loading system, a fracture initiation and expansion evaluation system, a large rock core clamping system, a confining pressure and outlet back pressure control system, a data measurement, acquisition and processing system, and other parts.

3、 Operation steps

1Place rock samples: Use a crane to lift cubic rock cores into the fracturing chamber, cover the chamber with a lid and seal it.

2Install sound emission probes, etc.

3Establish three-axis pressure: Open the three-axis injection pump to inject pressure oil into the oil cylinder, set the three-axis pressure value through the computer, and set the three-axis equal pressure or differential pressure;

4Fracturing fluid injection: Pour the fracturing fluid into a high-pressure piston container, turn on the dual cylinder constant pressure pump, and inject the fracturing fluid into the fractured rock core until the rock core ruptures.

4、 An whole

The safe operation of the instrument involves the personal safety of the operator and the normal service life of the instrument. The manufacturer reminds the operator to pay attention to the following points:

*All types of instruments and computers must ensure correct power input and be equipped with automatic voltage stabilization protection devices.

*Ensure that all parts of the instrument have good grounding.

*The pressure of each part of the process manifold should not exceed the design pressure, especially not exceed the range of various detection instruments.

*The valve design of the instrument is manual operation. Please pre design the test process according to the test steps. Any valve operation error may lead to the failure of the entire test.