Device for measuring the water content of oil in wells

 

The invention relates to the field of exploitation of oil fields and can be used for measuring the water content of the oil. The invention enables to simplify the device for automatic measurement of the water content of oil while increasing reliability. The device comprises a measuring tank and the gauge pressure. Measuring capacity divided by a partition into measuring and drain camera. In the upper part of the measuring container has a nozzle for blowing the drain chamber a gas tube connected with the bottom part of the drain chamber. 1 Il.

The invention relates to the field of development and exploitation of oil fields, in particular to the measurement of the water content of the oil wells.

The most common method to determine the water content of oil in the wells used in oil fields, is periodic sampling with subsequent analysis in the chemical laboratory. This method is based on the fact that when a known volume of the mass of the water-oil fluid is directly proportional to its density. The main disadvantage of this method is the impossibility of its automation. There are other methods which are not implemented in the oil industry due to the specific conditions of production;

object measurement - water oil liquid with dissolved gas is very complicated;

field conditions of such a device.

The prior art density bellows with unified pneumoperitoneum type ytr-P [1]. This device measured the hydrostatic pressure of the liquid column at a constant height. The liquid contained in the measuring tank, acts on the measuring bellows, posted on height and connected by a yoke. Bellows isolated from the fluid and air is supplied to them. The hydrostatic pressure of the liquid leads to uneven deformation of the measuring bellows. This movement of the bellows is transmitted to the rocker arm connecting the measuring bellows, and then through a system of levers with unified pnevmoperegruzhatel to the piezometric pressure sensor.

The disadvantages of the known devices [1] are as follows:

- the complexity of the device, requiring skilled personnel and excluding the work in the field;

- the presence of compressed air, which requires additional costs;

- the complexity of the object of measurement, continuous selection of the gas phase in a closed volume, and is Efti, containing the measuring container and a sensor for measuring pressure [2].

The main drawback of the device [2] is its complexity.

The objective of the invention is to simplify the device for automatic measurement of the water content of oil while increasing the reliability of his work in the oil fields.

The task is achieved by the fact that the principle of the device is directly connected with the operation of the automated group metering stations (AHP), for example, type "Sputnik AM-40", used for measuring the flow rate of wells in the oil fields [3]. It should be noted that the work now type "Satellite And does not measure other important for the development of oil fields parameter - watering oil. Measurement of flow rate of oil wells using now carried out by intermittent transmission fluid that has accumulated in the separator, through the turbine flow meter. The cyclic method of measuring the flow rate of oil production wells provides the transmission of fluid flow through the meter in a narrow range of flow rates that allows for the measurement of flow rate in a wide range. Water-oil fluid, proseds etiket from one cell to another. The passage of fluid through the meter and the device is in the closed gas valve. Upon completion of the cycle flow measurement using the AHP measuring line is overlapped by the flow regulator and into the measuring chamber device remains in the liquid column, the height of which is determined by the height of the partitions. The completion of a cycle of measurement of the flow rate corresponds to the opening of the gas valve, and in the upper part of the device the gas is fed from the separator now, which blows drain the device's camera. Measurement of the hydrostatic pressure of the liquid column is performed using a differential pressure gauge in the closed position of the flow regulator.

The comparison of the proposed solutions with other technical solutions shows that the measurement of the hydrostatic pressure of the liquid at the height of the column is known. However, when using the inventive device with the AHP, the principle is based on the accumulation of fluid in the separator, followed by passing it through the meter allows to measure the hydrostatic pressure after passing another portion of water-oil fluid. Strictly fixed height of the liquid column can increase the reliability of the determination of density. ATOA the invention is illustrated the circuit diagram of the device, shown in the drawing.

Device for measuring the water content of oil in the wells contains the measuring container 1 divided by a partition 2 into two chambers: measuring 3 and the drain 4. The measuring chamber has two nozzle 5 and 6 to attach the pressure sensor 7. In the upper part of the vessel, the device has a conduit 8 is connected by a pipe 9 with the bottom part of the drain chamber.

The device operates as follows. Another portion of water-oil fluid is supplied from the AHP in the measuring chamber 3 of the device and flows through the partition 2 into the drain chamber 4 and further to the output of the device. Upon completion of the measuring cycle flow measuring line now overlapped and in the measuring chamber 3 remains in the liquid column, the height of which is determined by the height of the partition 2. The gas entering the device from now through pipe 8, blows and releases from the liquid discharge chamber 4. The tube 9 is required to equalize the pressure in the upper part of the measuring tank and the lower part of the drain chamber 4. This tube prevents the formation of gas tube at the top of the device and, accordingly, the flow of fluid from the measuring chamber 3 into the drain chamber 4 after cessation Il DD", measured hydrostatic pressure of the column of liquid in the measuring chamber 3.

Automating the process of measuring the water content is directly connected with the AHP, which opens and closes the line with turbine meter volumetric liquid flow rate, and automatically connects to the separator AGZU test wells. After passing another portion of water-oil fluid through the device, the signal from the pressure sensor 7 is supplied to the controller for controlling the operation of the AHP. The controller performs a conversion of pressure to density, and the density ratio of water content. The result is automatically sent to a database or other repository.

The operation of the inventive device for measuring the water content of oil in wells complete with AGZU, for example, type "Sputnik AM-40" in the oil fields provides a reliable determination of water and oil in the fluid. The simplicity of the device does not require skilled staff, this eliminates the need for sampling liquids and their subsequent analysis in the chemical laboratory. Thus, the use of the device for measuring the water content of the oil wells in conjunction with the AHP, istani liquid directly on the oil fields.

Sources of information

1. Isakovich R. J., Popadic Century, that is, the Control and automation of oil and gas: a Textbook for colleges. -M.: Nedra, 1985.

2. U.S. patent No. 5394339 A class. G 01 N 9/26, publ. 28.02.1995.

3. Isakovich R. J., Loginov Century. And., Popadic C. E. automation of production processes in the oil and gas industry. Textbook for high schools. -M.: Nedra, 1983, S. 314-344.

Claims

Device for measuring the water content of oil in the wells containing the measuring vessel, the sensor measuring pressure, characterized in that the measuring container includes a partition separating her on the measuring and discharge chambers, and in the upper part of the measuring container has a nozzle for blowing the drain chamber a gas tube connected with the bottom part of the drain chamber.

 

Same patents:

The invention relates to analytical chemistry, in particular, to methods of analysis of liquid nitrogen fertilizers containing urea and ammonium nitrate in the form of their mixed aqueous solution

Moisture meter // 2088912

The invention relates to the oil industry, and in particular to methods for monitoring the technical condition of the production string injection wells to determine its integrity to prevent contamination of drinking water, as well as obtain reliable information about the extent of coverage of the impact of working capacity of the reservoir

Electric separator // 2224887
The invention relates to the field of drilling and can be used as equipment for the transmission of information during drilling

The invention relates to the field of monitoring the development of petroleum fields and can be used when measuring the performance of oil wells

The invention relates to the field of geophysical research wells and can be used in downhole devices

The invention relates to the oil industry and can be used to optimize oil production field, in particular for the development of the field by programming the injection for the directional displacement of oil

The invention relates to a method of determining the location and zone settings disorders (MN) integrity of concrete dams, as well as the contact zones of dams with rock bases and coastal adjacency

The invention relates to the field of development of gas condensate, gas and gazokondensatnyh fields and can be used in systems of crop production wells

The invention relates to the measurement of temperature distribution in an extended objects and can be used in the oil and gas industry

The centralizer // 2221142
The invention relates to devices for research exploration and wells geophysical methods, and is intended for centering borehole instruments in the string of drill pipes

The invention relates to oil production and can be used for the operational records of flow rates of production of oil and gas condensate wells in systems sealed collection

FIELD: mining industry.

SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.

EFFECT: optimized well operation.

2 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has body placed in body of stream pump and has locking valve and axial channel for logging cable with fixed logging device. Device also has discharge valve. Device body has ports in middle portion, which connect middle hollow portion of device to displacement chamber for stream pump. In upper and lower portions of body of device upper and lower compactors are placed, limited by support elements on each side of the latter, respectively. Locking valve is mounted in lower portion of device and mated with inner space of tubing string and logging device. Axial channels of valves are eccentric and parallel to first channel of device, while discharge valve is provided with rod with its end prominent relatively to body of device.

EFFECT: broader functional capabilities, higher reliability.

4 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes selection of cable of required rigidity and fixing devices on it. Transporting of devices into well is performed under effect from weight of cable and devices. Cable also contains inner hermetic pipe, which is plugged on both sides prior to lowering cable into well. Liquid is pumped into pipe under pressure through locking valve in upper plug and is kept in pipe under constant pressure during operation. After that cable is lowered with devices fixed to it. Value of pressure of liquid in pipe is determined from formula Ppipe≥ Pwell(Scable/Spipe-1)-QcablexLcable/Spipe<Ptear, where Ppipe - pressure of fluid in pipe, kg-wt/sm2; Scable - cross-section of cable with pipe, sm2; Pwell - hydrostatic pressure of well liquid column at depth of planned delivery of devices on cable, kg-wt/sm2; Spipe - cross-section area of pipe aperture and plug area equal to it in contact with liquid in pipe, sm; Qcable - weight of 1 km of cable with pipe, kg-wt; Lcable - length of cable to depth of planned delivery of devices, km; Ptear - pressure of liquid in pipe leading to tear of cable, kg-wt/sm2, determined from formula: Ptear=Ftear/Spipe, where Ftear - tear force for cable according to documentation, kg-wt.

EFFECT: higher efficiency.

3 cl, 1 dwg, 1 tbl

Profile meter // 2244120

FIELD: geophysics.

SUBSTANCE: device has body, spring-loaded levers jointly connected to it, levers position indicator, made in form of constant magnet mounted at joint connection end of each measuring lever, and signal converter, mounted in body in protective chamber. Constant magnet is made in form of washer and is mounted in circular groove on rotation axis of each lever, and as signal converter magnetic-resistive sensor is used in form of resistive bridge circuit sensitive to direction of magnetic field and non-sensitive to its intensity, while magnetic axis of constant magnet is in plane of washer and is directed perpendicularly to sensitivity axis of magnetic-resistive sensor.

EFFECT: higher precision, simplified construction, lesser dimensions.

3 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has body with ports in lower and upper ends, main sensitive elements in form of turbines and packing elements, placed in pairs at body ends, side port made in body between main sensitive elements and converter, connected to surface equipment. In side pipe, mounted inside the body between main sensitive elements, additional sensitive element is placed in form of turbine and thermal sensor. Lower end of side pipe is connected to side port. Diameter of turbine of additional sensitive element is less than diameter of turbines of main sensitive elements. Converter is a control block mounted above body including sleeves locator and electronic microprocessor device.

EFFECT: higher precision.

1 dwg

Up!