The Oriental Geophysical Exploration "low-frequency vibroseis and low-frequency seismic exploration technology" project won the first prize of China's geophysical science and technology progress, marking the international geophysical low-frequency seismic excitation technology reached the international leading level.
The low-frequency information in seismic data is one of the important properties of oil and gas, which is very effective for improving reservoir resolution, full-wave field seismic inversion, improving deep imaging and direct detection of oil and gas. The low-frequency source signal is beneficial to improve the vertical resolution of the reservoir, and can directly detect oil and gas, which is very beneficial to improve the quality of deep imaging and help to obtain better underground geological data on the special surface of igneous rocks.
In early 2012, the low frequency vibrator project was listed as the national “863†program. The Eastern Geophysical Exploration brings together elites to attack. In the end, the lowest frequency of the low-frequency source independently developed by Oriental Geophysical Exploration is 3 Hz, and the low-frequency seismic signal that can be received reaches 1.5 Hz. It was put into industrial production in 2013.
This technology can greatly improve the bandwidth of seismic waves, is conducive to high-precision imaging, and is conducive to the direct use of seismic waves for accurate inversion of the properties of the target. The application effect of more than 80 projects at home and abroad shows that this technology has achieved good geological effects in solving the geological target imaging under the salt, deep desert hinterland and coal seam and igneous rock zone, greatly improving the oil. The accuracy of the Tibetan property prediction technology; highly recognized by the oilfield company, and promoted the advancement of geophysical technology.
Pneumatic ball valve is a ball valve equipped with a pneumatic actuator. The execution speed of the pneumatic actuator is relatively fast. The fastest switching speed is 0.05 seconds / time, so it is usually also called pneumatic quick cut-off ball valve. Pneumatic ball valve is usually equipped with various accessories, such as solenoid valve, air source treatment triplet, limit switch, positioner, control box, etc., to realize local control and remote centralized control. The valve can be controlled in the control room without running to the site or high altitude and dangerous areas for manual control, which saves human resources, time and safety to a great extent.
The pneumatic ball valve can be closed tightly only by using the pneumatic actuator to rotate 90 degrees with the air source and a small rotating torque. The completely equal inner cavity of the valve body provides a very small resistance and straight flow channel for the medium. It is generally considered that the ball valve is most suitable for direct opening and closing. The main feature of the ball valve is its compact structure and easy operation and maintenance. It is suitable for general working media such as water, solvent, acid and natural gas, as well as media with poor working conditions, such as oxygen, hydrogen peroxide, methane and ethylene. The ball valve body can be integral or combined.
Pneumatic butterfly valve is composed of pneumatic actuator and butterfly valve. Pneumatic butterfly valve is a pneumatic valve that uses the circular butterfly plate rotating with the valve stem as the opening and closing property to realize the opening and closing action. It is mainly used as a block valve. It can also be designed to have the function of regulation or section valve and regulation. Butterfly valve is more and more used in low-pressure large and medium-sized pipelines. Classification of pneumatic butterfly valve: stainless steel pneumatic butterfly valve, hard seal pneumatic butterfly valve, soft seal pneumatic butterfly valve and carbon steel pneumatic butterfly valve. The main advantages of pneumatic butterfly valve are simple structure, small volume, light weight and low cost. The characteristics of pneumatic butterfly valve are particularly remarkable. It is installed in a high-altitude concealed channel, controlled by two position five way solenoid valve, easy to operate and can also adjust the flow medium.
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