CN1072499A - A kind of oil, gas and water measuring separator - Google Patents

Abstract

A kind of oil, gas and water measuring separator, it is applicable to the management of doing oilfield produce oil metrology and measurement and oil well production.It has standard separation vessel, air pressure and differential pressure pickup.Temperature sensor, oil-water interface and oil gas interface sensor is characterized in that: standard industrial control and central control computer are arranged, be inserted with the adaptation module of each sensor and exhaust, oil, water metering valve control adapter module in the interface in control.Owing to used the form of electromechanical integration, use central control computer directly to control the acquisition measurement data, and every error of each sensor is proofreaied and correct with the method for software, simplified circuit structure, improved measuring accuracy.

Description

A kind of oil, gas and water measuring separator

A kind of oil, gas and water measuring separator, it is applicable to the management of doing oilfield produce oil metrology and measurement and oil well production.

Oil, gas, the water separation device that promote the use of in present oil field adopt the iris type separation method more, use artificial Monitoring and Controlling or adopt some electromechanical instrument to monitor.But because the oil-gas-water metering separation vessel all is operated in the scene, oil field, work under bad environment, the maintenance management condition is very poor.On the other hand, the various electromechanical instrument that are used for image data are all added by various physical sensors amplifies and display circuit is formed, because of various sensors exist non-linear, drift and change of sensitivity etc., need to increase the correction-compensation circuit, and to increase a large amount of adjustment staking-out works, make the complex structure of whole device, cost increases.For oil and gas and water from speed and the ratio of divide separating this three of back, depend on the component ratio, viscosity, liquid-drop diameter of oil well drawing liquid etc., therefore, can obtain these oil well production parameters by the ratio that in the unit interval, obtains oil, gas, water.In artificial separation vessel, be the aperture of controlling three liquid outlets (oil, gas, water) by the height of workman personal monitoring oil gas interface and oil-water interface respectively, guarantee normally carrying out of separation.Adopt special measuring apparatus to measure, measuring accuracy is not high on the one hand, increases operator's difficulty on the other hand yet.And adopt instrument and meter for automation to measure oil gas interface and oil-water interface parameter, though can alleviate operator's difficulty, the interconnection of instrument and meter for automation and opertaing device and control also more complicated is unsuitable for the working environment of separation vessel.

The objective of the invention is to invent a kind of oil-gas-water metering separation vessel of electromechanical integration, use electromechanical integration technology, be combined as a whole measuring with control, simple in structure, with low cost, good environmental suitability is arranged.

Structure of the present invention as shown in Figure 1, it has separator flask 1, dividing plate 2, outlet valve 3, oil-out valve 4, gas outlet valve 5, gas filter screen 6, gas discharge capacity differential manometer metered valve 7 is arranged in outlet pipe, gas pressure sensor 8, differential pressure pickup 9, temperature sensor 10, at oil-water interface place charge of oil water interface sensor 11, level sensor 12 also is housed in container 1, it is characterized in that: standard industrial control 13 is nearby arranged at separator flask 1, standard industrial control 13 by the standard serial communication interface with can link to each other with the total central control computer 14 of other control and measuring equipment, in standard industrial control 13, be inserted with respectively and sensor 8,9,10, the 11 measurement adaptation module that link to each other with 12 and with valve 3,4 control adapter module that link to each other with 5, outlet valve 3 and oil-out valve 4 are digital controlled metrological valve.

Oil and gas and water of the present invention is the same with the separation principle of conventional separator from principle, by an end feed liquor of separator flask 1, utilizes between them the difference of proportion to separate.The effect of dividing plate 2 is that the profit that keeps having separated no longer mixes and the profit that arrives fluid, gas port has enough residence time.In separator flask, the oil gas interface requires that more accurate height is arranged, and is controlled at the height higher slightly than dividing plate, to obtain optimal separating efficiency.Among the present invention, all sensors all are a simple measuring sensor, are a thermal sensing element as temperature sensor 10, and pressure differential pressure sensor 8 or 9 is a pressure-active element etc.All physical quantity signals are handled all and are finished by the adaptation module and the central control computer 14 that insert in the standard industrial control (being called for short RTU) 13.Adopted the electromechanical integrated structure of standard, under the control of central control computer 14, when needs detect delivery temperature, earlier send address gating signal to RTU13 by the standard serial communication interface, corresponding temperature sensor 10 adaptation module of RTU13 gating, adaptation module by temperature sensor 10 sends back to central control computer 14 to the value that temperature sensor 10 records after the A/D conversion, other measured value is also gathered with same procedure.To each valve, when the aperture of gas outlet valve 5 is adjusted, central control computer 14 is by serial ports OPADD gating signal, adaptation module by RTU13 gating gas outlet valve 5, and then pass through serial port and send the opening data, be converted to 5 actions of analog signals rear drive valve through the D/A of adaptation module.The measurement of gas delivery flow by central control computer 14 difference gating pressure and differential pressure pickup and temperature sensors, obtains their value, obtains the gas outlet flow by Computer Processing.The measurement of 14 pairs of all systematic parameters of central control computer can be used the mode of scanning, constantly carries out in turn, to obtain the real-time system parameter, each valve is carried out real time measure and control.

In the present invention, various sensors link to each other with corresponding adaptation module by electric wire, do not use the form of traditional instrument and meter for automation, sent into computing machine by the electric signal that sensor directly obtains by the adaptation module Direct Digitalization, and non-linear, the sensitivity of various sensors and drift error are carried out digital operation by computing machine and are proofreaied and correct, do not use correction control circuit, and the adjustment of each sensor demarcates and also to be finished automatically by computing machine, and various correction data are deposited in computing machine.This had both simplified circuit structure, reduced cost, and had also reduced the workload of artificial adjustment, had improved measuring accuracy.Simultaneously, have only sensor to be loaded on the separator flask 1, and other circuit all is loaded in the RTU case, not affected by environment, be adapted to various rugged surroundings.

Among the present invention, RTU13 can use the LC4 controller of U.S. OPTO22 company.RTU13 of the present invention can adopt that to pack into as the patent No. be in the casing of " airtight box structure of standard industrial control medium surface " form of CN89214959, and isolated fully external environment is to the influence of RTU and each adaptation module.In the present invention, outlet valve 3, oil-out valve 4 can be designed metering valve among the CN91218716 " a kind of electromechanical integrated digital controlled metrological valve device " as the patent No., also can use common controllable valve to add flow measurement device.Among the present invention, level sensor 12 can use as the survey sensor of the patent No. as CN90200023 " a kind of measuring unit for liquid specific gravity and level ", it is made up of two pipe and pressure, differential pressure pickups by the certain-length difference, this sensor measurement precision height is adapted to the requirement of electromechanical integration.Also can with other as photoelectricity, float liquid level sensor.Oil-water interface sensor 11 among the present invention can use photoelectric sensor, utilizes oil different with the transmittance of water, comes the measuring position by the different output valves of the light activated element on the diverse location, also can use capacitive transducer.Because the specific inductive capacity difference of oil and water is very big, thereby there are different electric capacitys different interface positions.Because the oil-water interface position does not influence the separating property of oil gas water, measuring accuracy can be very high.

Central control computer 14 among the present invention can use industrial control computer, also can use PC, can also use the ME(MECHATRONIC EQUIPMENT INC. as the U.S.) the PCS-1 universal process Control work station of company.The very strong PARAGON500 universal process Control Software of function is housed in this workstation, can programmes and use mutual input mode input control to require and strategy, automatically the generating run program.

Claims (1)

1, a kind of oil, gas and water measuring separator, it has separator flask 1, dividing plate 2, outlet valve 3, oil-out valve 4, gas outlet valve 5, gas filter screen 6, gas discharge capacity differential manometer metered valve 7 is arranged in outlet pipe, gas pressure sensor 8, differential pressure pickup 9, temperature sensor 10, at oil-water interface place charge of oil water interface sensor 11, level sensor 12 also is housed in container 1, it is characterized in that: standard industrial control 13 is nearby arranged at separator flask 1, standard industrial control 13 by the standard serial communication interface with can link to each other with the total central control computer 14 of other control and measuring equipment, in standard industrial control 13, be inserted with respectively and sensor 8,9,10, the 11 measurement adaptation module that link to each other with 12 and with valve 3,4 control adapter module that link to each other with 5, outlet valve 3 and oil-out valve 4 are digital controlled metrological valve.

Images