CN102959366A - Method and apparatus for measuring oil-content in production fluid - Google Patents
Method and apparatus for measuring oil-content in production fluid Download PDFInfo
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- CN102959366A CN102959366A CN2012800017711A CN201280001771A CN102959366A CN 102959366 A CN102959366 A CN 102959366A CN 2012800017711 A CN2012800017711 A CN 2012800017711A CN 201280001771 A CN201280001771 A CN 201280001771A CN 102959366 A CN102959366 A CN 102959366A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000523 sample Substances 0.000 claims abstract description 106
- 238000000926 separation method Methods 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims description 244
- 239000003129 oil well Substances 0.000 claims description 107
- 238000005259 measurement Methods 0.000 claims description 31
- 238000010079 rubber tapping Methods 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 10
- 238000004062 sedimentation Methods 0.000 claims description 7
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- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
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Abstract
A method for measuring the oil-content in a production fluid, comprising: inputting the production fluid into a vertical separation tank (1) via a pipeline (2), thus allowing for collection and settlement of oil and water into separated layers, and for formation of an emulsified oil layer at the mid-section of the separation tank and a free water layer at the lower-section; dividing along the vertical direction the volume of fluid within the separator tank (1) into multiple fluid layers in the horizontal direction, each fluid layer having the volume thereof predetermined; using an oil-water constituent measuring probe (6) to measure the oil-content of each fluid layer; acquiring the oil-content of the volumes corresponding to the multiple fluid layers on the basis of the measured oil-content of each fluid layer and of the predetermined volume of each fluid layer. Also provided is an apparatus for measuring the oil-content in the production fluid.
Description
This application claims in the priority of submission on March 28th, 2011 Patent Office of the People's Republic of China, the Chinese patent application of Application No. 201110087369. 7 entitled " produced liquid in oil well oil content metering method and device " for produced liquid in oil well oil content metering method and device；And Patent Office of the People's Republic of China, a kind of priority of the Chinese patent application of Application No. 201110158124. 9 entitled " Combined water-containing measuring instrument " are submitted on June 2nd, 2011, entire contents are hereby incorporated by reference in the application.Technical field
The present invention relates to the method and its device that a kind of production fluid to oilfield carries out oil content metering.Specifically, the method and device that multi-phase separation is carried out to produced liquid in oil well, successively detected of exactly a kind of pot type.
Background technology
A kind of mixed liquor being made up of crude oil, water, associated gas from oil well produced stoste in the production process in oil field, can cylinder be referred to as produced liquid in oil well.Produced liquid in oil well is being transported to before field joint stations are focused on, need to measure it by Oil, Water, Gas three-phase component, cylinder claims one-well metering, particularly the oil production to oil well is measured, so as to grasp the production status of each oil well in time, production scheduling is rationally carried out.
The existing one-well metering technology in oil field, it is main to include metering knockout drum intermittent dosing technology, two-phase laminated flow continuous metering technology and three phase separation continuous metering technology.Wherein, two-phase laminated flow continuous metering technology, such as Chinese patent 200610105004. 1,200320125135. 8 technical schemes proposed respectively, structure are compacter, but too big to the error in dipping of well oil output, and can not verify；Three phase separation continuous metering technology, such as the technical scheme that Chinese patent 200420022701. 7 is proposed, its error in dipping to well oil output is substantially reduced, but complicated, cost is high, operating difficulties, moreover, its error in dipping to well oil output is not easy to checking.
Therefore, the oil well metering device that oil field is widely applied now is still metering knockout drum interval
Measurement technology, the technical scheme introduced such as Chinese patent CN98222454. 0, it is provided with a vertical knockout drum, on the top, bottom, top of knockout drum, it is respectively equipped with produced liquid in oil well intake line, liquid export line, gas export line, liquid feed valve, tapping valve, air bleeding valve are respectively equipped with produced liquid in oil well intake line, liquid export line, gas export line, the liquid level indicator for measuring innage is additionally provided with metering knockout drum；After the emptying of knockout drum internal liquid, open air outlet valve and produced liquid in oil well transfer valve, closing liquid delivery valve, start simultaneously at timing, produced liquid in oil well into metering knockout drum enters promoting the circulation of qi in tank, liquid is separated, it is separated go out gas through defeated outside gas export line, liquid is gradually deposited at the bottom of metering knockout drum under the monitoring of liquid level indicator, after liquid level reaches some height that liquid level indicator is indicated, stop timing, then it can just calculate the Liquid output of oil well in timing time, then, manually from the mode of wellhead sampling, detect the oil content or moisture content of liquid, finally draw crude oil and the respective yield of water.
The advantage of the technical scheme is that structure cylinder is single, cheap, can easily measure in timing time or in the unit interval oil well Liquid output, but crude oil and the respective yield of water in timing time can not be measured simultaneously, need to sample by oil well, the artificial mode for surveying moisture content calculates the crude output of producing well, because sampling time and oil sample have very big uncertainty in itself, so, not only the time length of oil well measurement, labor intensity are big, the precision of metering can not also ensure, still can not meet requirement of the oil field to oil well measurement.The content of the invention
The technical problems to be solved by the invention are to overcome the deficiencies in the prior art there is provided a kind of method cylinder is single, operate reliably, using knockout drum is measured, while measuring oilwell produced fluid amount in timing time, measure the respective yield of crude oil, water；Error in dipping is small, and the produced liquid in oil well oil content metering method and device that can be verified.According to one embodiment of present invention there is provided a kind of production fluid oil content metering method,
Including：
Produced liquid in oil well is inputted into a vertical knockout drum by intake line, to assemble and carry out profit sedimentation layering, the emulsified oil layer being located in the middle part of separation tank body and the free water layer positioned at bottom is formed；
Liquid volume in knockout drum is divided into multiple liquid levels in horizontal direction along vertical direction, the volume of each liquid level is default；
The oil content of each liquid level is measured using profit component gage probe；According to the volume of the oil content of measured each liquid level and each default liquid level, the oil content of the volume corresponding to the multiple liquid level is obtained.
In addition, according to one embodiment of present invention, additionally provide a kind of produced liquid in oil well oil content metering device, including a vertical knockout drum, produced liquid in oil well intake line is respectively equipped with the top, bottom, top of knockout drum, liquid export line, gas export line, are respectively equipped with liquid feed valve, tapping valve, air bleeding valve on produced liquid in oil well intake line, liquid export line, gas export line；It is characterized in that：On the different specified altitudes of the knockout drum vertical direction, multiple profit component gage probes are installed.
Above-mentioned produced liquid in oil well intake line can be arranged on any position of separation tank body, such as top, middle part, bottom, but consider from simplifying design, facilitating three-phase medium to separate angle, be preferably provided at the top of separation tank body.
Described profit component gage probe can be ray type, high frequency or microwave absorption formula, electric capacity or impedance type etc..
Described profit component gage probe can be installed with sidepiece, can also top install, it in vertical direction can not be in a plane.
Described profit component gage probe be able to can also become one with liquid level indicator with scattering device on knockout drum.In specific works, multiple profit component gage probes are covered with the emulsified oil layer in the middle part of separation tank body in vertical direction, and extend down into free water
Layer, extend upward into gas blanket；
For the ease of description, knockout drum is broadly divided into three parts by we in vertical direction, i.e., the collection bunker and the collection gas storehouse on top of the drain sump, middle part positioned at bottom.
For measuring aqueous higher produced liquid in oil well, in order to ensure that the measuring accuracy of oil production is not reduced, when carrying out oil well measurement, it is required that the emulsified oil layer in the middle part of separation tank body must reach defined thickness, this requires described separation tank body to have enough height, so as to provide sufficiently large space for the free water layer positioned at bottom, this adds increased the cost of device, while reducing adaptability of the device to place.For this, technical scheme proposed by the invention, it has been specifically designed the separation tank body that a middle part laterally reduces, lateral cross-sectional area in the middle part of i.e. described separation tank body is the 5% to 80% of the lateral cross-sectional area of the separation tank body lower part, under the conditions of the height of vertical separation tank body is not increased, the thickness of measurable emulsified oil layer is significantly increased, the precision of crude oil measurement is improved.
Technical scheme proposed by the invention, on gas export line, can also set a gas flowmeter, the gas yield for measuring oil well in designated time section, realize the three phase metering to Oil, Water, Gas.
In order to further improve the precision and convenience of oil well measurement, technical scheme proposed by the invention is also provided with a data processing and control unit, and described data processing and control unit are electrically connected with described liquid level indicator, multiple profit component gage probes, gas flowmeter and multiple electrically operated valves on each pipeline etc. respectively.Described data processing controls the work of each electrically operated valve with control unit respectively, quickly handles the various data collected, the metric results of tested oil well are provided in time.
The beneficial effect that technical scheme proposed by the invention is brought is：
First, technical scheme proposed by the invention, while the metering knockout drum using cylinder list is realized and the produced liquid in oil well scale of construction is measured, by on the different specified altitudes of knockout drum vertical direction, the multiple profit component gage probes installed, oil content in real time can be carried out to the horizontal liquid layer where probe to measure, realize the metering to crude oil net production successively, it is full
The current demand of foot oil field production.
Second, by the vertical separation tank body for proposing a middle part undergauge, correspondingly improve the height of metering oil reservoir, under conditions of the accuracy of instrument such as liquid level indicator, profit component measuring instrument are certain, the measuring accuracy of metering knockout drum can further be improved, reduce the error in dipping of crude output, be particularly suitable for the metering of the complicated oil well such as fuel-displaced to High water cut, interval.
Brief description of the drawings
The present invention is described further below in conjunction with the accompanying drawings.
Fig. 1 is schematic diagram according to an embodiment of the invention, and multiple profit component gage probes employ side assembling structure.
Fig. 2 is another structural representation of one embodiment of the present of invention, and multiple profit component gage probes employ top assembling structure.
Fig. 3 is a schematic diagram using horizontal undergauge structure in the middle part of separation tank body of embodiments of the invention, and liquid level indicator and multiple profit component gage probes employ integrated top assembling structure.
Fig. 4 is the schematic diagram of one embodiment of the invention.
Fig. 5 is the other embodiments schematic diagram of the present invention.
Fig. 6 is the structural representation of the one embodiment for the probe that the present invention is used.
Fig. 7 is the structural representation of the second electrode of the one embodiment for the probe that the present invention is used.
Label is in figure：1st, tank body is separated, 101, separate the drain sump of tank body lower part, 102, the collection bunker in the middle part of separation tank body, 103, the collection gas storehouse on separation tank body top；2nd, produced liquid in oil well intake line, 201, manual liquid feed valve, 202, electronic liquid feed valve；3rd, liquid export line, 301, manual drain valve, 302, electronic tapping valve；4th, gas export line, 401, manual exhaust valve, 402, electric-powered air release valve；5th, liquid level indicator；6th, multiple profit component gage probes, 601,602,603... ... profit component gage probes；7th, data processing and control unit；56th, multiple profit component gage probes and liquid level indicator integrating device； 8、
Gas flowmeter 303, fluid flowmeter；304th, online profit component instrument；305th, mass flowmenter；306th, positive displacement pump；G601, G602, G603 ..., the sample tap corresponding with profit component gage probe；F601, F602, F603 ..., sampling valve is corresponded to each sample tap；701st, electronic display；D1. first electrode, D2. second electrode, D3. support connection body, D4. isolated insulation part, D5. signals and data processing unit, D6. electic protection housings, D101. section split pole, D102. insulating fixing piece, D103. sections of split pole leads, D104. insulating barriers, D105. segment signal measurement circuitry, D106. data transmission bus, D201. second electrode leads, D202. connectors, D401. isolated insulation end socket, D402. isolated insulation plug, D501. electronic switches, D502. common section signal measurement circuits.Embodiment
According to one embodiment of the invention, there is provided a kind of produced liquid in oil well oil content metering method, including produced liquid in oil well is inputted into a vertical knockout drum by intake line, to assemble and carry out profit sedimentation layering, the emulsified oil layer being located in the middle part of separation tank body and the free water layer positioned at bottom are formed；Liquid volume in knockout drum is divided into multiple liquid levels in horizontal direction, the volume of each liquid level is default on along vertical direction；The oil content of each liquid level is measured using profit component gage probe；According to the volume of the oil content of measured each liquid level and each default liquid level, the oil content of the volume corresponding to the multiple liquid level is obtained.In one embodiment, produced liquid in oil well inputs a vertical knockout drum by intake line first, carried out in knockout drum after air-liquid separation, gas blanket is formed on separation tank body top, gas is defeated outside the gas export line through top, liquid is assembled in the knockout drum that tapping valve is closed and carries out profit sedimentation layering, forms the emulsified oil layer being located in the middle part of separation tank body and the free water layer positioned at bottom；The liquid level indicator being provided with by knockout drum measures innage；After liquid level reaches requirement height, produced liquid in oil well input time T is recorded;On the different specified altitudes of knockout drum vertical direction, multiple profit component gage probes, its institute of each probe measurement are installed
In the oil content η i of liquid level, adjacent probes by-level face is set as the upper interface or lower interface of a liquid level, according to the physical dimension of knockout drum and probe it is set-mounted, thickness ^, the horizontal sectional area Si of liquid level where determining each probe, the oil content volume V of liquid level where calculating each probei, the oil content volume of liquid level is added where each probe, draws the oil production volume V oil of oil well in feed liquor time T.
The technology is described in detail below.Produced liquid in oil well inputs a vertical knockout drum by intake line, carried out in knockout drum after air-liquid separation, gas blanket is formed on separation tank body top, gas is defeated outside the gas export line through top, liquid is assembled in the knockout drum that tapping valve is closed and carries out profit sedimentation layering, forms the emulsified oil layer being located in the middle part of separation tank body and the free water layer positioned at bottom；Knockout drum is provided with liquid level indicator, for measuring innage；On the different specified altitudes of knockout drum vertical direction, it is additionally provided with multiple profit component gage probes, each the profit component gage probe being completely covered below liquid level by liquid, in vertical direction, one be located by it comprising wherein, the horizontal liquid layer for having certain thickness hi representated by the data that its oil content ^ can be measured by the profit component gage probe, adjacent horizontal liquid layer mutually slitless connection, described horizontal liquid layer it is upper, lower liquid level, the profit component gage probe included depending on it with it is adjacent upper, the respective height dimension of lower probe and its measurement range in vertical direction, the difference in height of the upper liquid level of each horizontal liquid layer and its lower liquid level, it is exactly the thickness ^ of horizontal liquid layer, ideally, in vertical direction, scope measured by each profit component gage probe is the same, the distance between two neighboring profit component gage probe is also impartial, at this moment, the thickness ^ of each horizontal liquid layer is exactly the difference in height between two neighboring center probe point；Vertical range between adjacent profit component gage probe should be as small as possible, to improve the precision of oil/water measurement, multiple profit component gage probes are covered with the emulsified oil layer in the middle part of separation tank body in vertical direction, and extend down into free water layer, extend upward into gas blanket；
After the liquid level that described liquid level indicator is monitored in knockout drum reaches requirement height, immediately begin to reading or start reading after produced liquid in oil well is transferred onto short-circuit pipeline by valve, this
A little readings include feed liquor time T, liquid surface total height Η, oil content η i of each horizontal liquid layer etc., because the physical dimension of the knockout drum is known, liquid surface total height H has been read, the Liquid output volume V of oil well in feed liquor time T has just been drawn；The horizontal liquid layer i positioned for each by profit component gage probe, the horizontal liquid layer for being zero from the η i of bottom, to subsurface first complete horizontal liquid layer n, its oil content ^, thickness ^, horizontal sectional area S i are known, and having an incomplete horizontal liquid layer n+1 from total liquid level to subsurface first unbroken layer n, its height is the upper liquid level H that liquid surface total height H subtracts n-th layern_ t, its liquid oil content is approximately the oil content η of n-th layerη, therefore, the oil content volume V of each complete horizontal liquid layeriWith the oil content volume v of topmost one layer incomplete horizontal liquid layern+1Can be by calculating, the oil content volume of the above each horizontal liquid layer is added, and has just drawn the oil production volume V oil of oil well in feed liquor time T
η η
V oil=X Si hi η i+Sn+1 η n(H-on）
η ;=0
So, we have also measured corresponding oil production while Liquid output of the producing well in timing time is measured.
After this metering terminates, air bleeding valve is closed, tapping valve, liquid feed valve are opened, after the emptying rate of liquid in knockout drum next time, you can measured.
For the ease of description, above-mentioned knockout drum is broadly divided into three parts by us in vertical direction, i.e., the collection bunker and the collection gas storehouse on top of the drain sump, middle part positioned at bottom.
Another sunset is foretold, for measuring aqueous higher produced liquid in oil well, in order to ensure that the measuring accuracy of oil production is not reduced, when carrying out oil well measurement, it is required that the emulsified oil layer in the middle part of separation tank body must reach defined thickness, this requires described separation tank body to have enough height, so as to provide sufficiently large space for the free water layer positioned at bottom, this adds increased the cost of device, while reducing adaptability of the device to place.Therefore, technical scheme proposed by the invention, has been specifically designed the separation tank body that a middle part laterally reduces, i.e. described separation
Lateral cross-sectional area in the middle part of tank body is the 5% to 80% of the lateral cross-sectional area of the separation tank body lower part, under the conditions of the height of vertical separation tank body is not increased, hence it is evident that add the thickness of measurable emulsified oil layer, improve the precision of crude oil measurement.
Below in conjunction with the accompanying drawings and example, device, which is further described, to be realized to the present invention.
Example 1:
As shown in Figure 1, a kind of produced liquid in oil well oil content metering device, provided with a vertical knockout drum 1, produced liquid in oil well intake line 2 is respectively equipped with the top, bottom, top of knockout drum 1, liquid export line 3, gas export line 4, are respectively equipped with liquid feed valve 201, tapping valve 301, air bleeding valve 401 on produced liquid in oil well intake line 2, liquid export line 3, gas export line 4;The liquid level indicator 5 of monitoring liquid level is additionally provided with knockout drum, it is characterized in that：Multiple profit component gage probes 6 are additionally provided with described knockout drum 1, oil content or measurement of water ratio sequentially or simultaneously can be carried out to the horizontal liquid layer where probe, the described side of profit component gage probe 6 is on knockout drum 1；In vertical direction, each profit component gage probe such as 601,602 etc., clearly, the liquid level representated by data that adjacent profit component gage probe is measured is mutually butted its height dimension.
Above-mentioned produced liquid in oil well intake line can be arranged on any position of separation tank body, such as top, middle part, bottom, but consider from simplifying design, facilitating three-phase medium to separate angle, be preferably provided at the top of separation tank body.
Constitute the profit component gage probe of multiple profit component gage probes 6, such as 601,602, the oil content measurement of horizontal oil-water-layer where each probe is independently completed, the average oil content of horizontal liquid layer where measured oil content should be able to be represented.
Liquid level representated by the data of adjacent profit component gage probe measurement is mutually butted, i.e., the lower interface of the oil-water-layer where 601 should be overlapped with the upper interface of the oil-water-layer where 602；The lower interface of oil-water-layer where 602 should be overlapped with the upper interface of the oil-water-layer where 603, in vertical direction, no matter each profit component gage probe i actual measurement height is how many, and the thickness h i by the liquid level of its definition is changeable, with the oil content measured by it
Oil-water-layer i oil content is defined where η i can be represented, and as a preferred example, the measurement height and the thickness of each liquid level of profit component gage probe can be caused to be substantially identical.
Described profit component gage probe can be ray type, high frequency or microwave absorption formula, electric capacity or impedance type etc., between each profit component gage probe and its data processing and display module, both can be man-to-man connection, can also be that multiple profit component gage probes share a data processing and display module, these are well known to those skilled in the art.
Example 2:
As shown in Fig. 2 a kind of produced liquid in oil well oil content metering device, it is characterized in that described profit component gage probe 601,602,603 etc., top is on knockout drum 1, and further feature is identical with example 1.
Example 3:
A kind of produced liquid in oil well oil content metering device, it is characterized in that described profit component gage probe 601,602,603 etc., a device 56 is integrated into liquid level indicator 5, and is pushed up on knockout drum 1, further feature is identical with example 1.Preferably, liquid level is not higher than the top of collection bunker.
Example 4:
As shown in Figure 3, a kind of produced liquid in oil well oil content metering device, it is characterized in that, the drain sump 101 for separating tank body lower part, the lateral cross section for integrating bunker 102 at middle part are as Round shapes, the diameter of the collection lateral cross section of bunker 102 is 1/2nd of the diameter of the lateral cross section of drain sump 101, the height of the collection bunker 1 02 is 3/5ths of the height of drain sump 101, and further feature is identical with example 3.Preferably, liquid level is not higher than the top of collection bunker.
Example 5:
As shown in figure 3, a kind of produced liquid in oil well oil content metering device, it is characterized in that, the drain sump 101 of the separation tank body lower part, the lateral cross section for integrating bunker 102 at middle part as Round shapes,
The diameter of the collection lateral cross section of bunker 102 is 1/3rd of the diameter of the lateral cross section of drain sump 101, and further feature is identical with example 4.
Example 6:
As shown in Figure 2, a kind of produced liquid in oil well oil content metering device, it is characterized in that, provided with a data processing and control unit 7, described data processing and control unit 7 are electrically connected with described liquid level indicator 5, each profit component gage probe 601,602,603, gas flowmeter 8 and electronic liquid feed valve 202, electronic tapping valve 302, electric-powered air release valve 402 on each pipeline etc. respectively.Described data processing controls the work of each electrically operated valve with control unit 7 respectively, and the various data of quick processing collection provide the metric results of tested oil well in time.Further feature is identical with example 2.
Example 7:
A kind of produced liquid in oil well oil content metering devices of as shown in Figure 4, it is characterized in that being respectively equipped with corresponding sampling line G601, G602, G603 ... with the corresponding position of multiple profit component gage probes 601,602,603 ... in described separation tank wall, corresponding valve F601, F602, F603 ... are respectively equipped with each sampling line, for verifying that each profit component gage probe measures liquid aqueous rate or the error of oil content；Meanwhile, the electronic display 701 of each oil-water-layer moisture content or oil content can be shown by being electrically connected provided with one with each profit component gage probe.When Face demonstrate,proves each profit component gage probe and measures the error of liquid aqueous rate or oil content, the moisture content of the moisture content of the sampling liquid drawn with apparatus measures and the respective liquid layer of the electronic display screen displays is compared, so as to draw the measurement error of the profit component gage probe.Described electronic display can be mesomorph form or LED or other forms.
Example 8:
Shown in Fig. 5.A kind of produced liquid in oil well oil content metering device, it is characterized in that provided with fluid flowmeter 303 in drain line 3, when measuring the oil well of moisture content superelevation, in order that collection bunker 102 internal emulsification oil reservoir keeps enough height, can to point
During tank body feed liquor, control discharges some free waters by drain line from drain sump 101, this part free water of discharge is measured by the flowmeter being located in drain line 3, counted when measuring the Liquid output of oil well, so as to ensure that measuring accuracy on the whole to well oil output, further feature is identical with example 2 (or 6).
Example 9:
A kind of produced liquid in oil well oil content metering device, it is characterized in that provided with the fluid flowmeter 303 and an online profit component instrument 304 mutually concatenated in drain line 3, fluid flowmeter 303, online profit component instrument 304, are electrically connected with data processing and control unit 7 respectively.Herein, the combination of fluid flowmeter 303 and online profit component instrument 304 can also be replaced with a mass flowmenter 305.The technical program can provide this produced liquid in oil well oil content metering device extra continuous gauging function, and further feature is identical with example 2 (or 6).
Example 10:
As shown in Figure 5, a kind of produced liquid in oil well oil content metering device, it is characterized in that provided with a positive displacement pump 306 in drain line 3, after produced liquid in oil well oil content metering device completes the metering of certain mouthful of oil well, can be independent of the associated gas in produced liquid in oil well, quick fluid-discharge is carried out by positive displacement pump 306, the measurement efficiency and the scope of application of produced liquid in oil well oil content metering device is improved, further feature is identical with embodiment 2 (or 6).
In above-mentioned example, the profit component gage probe in Fig. 2-Fig. 5 can submit the probe of the combined electrode structure disclosed in Patent Office of the People's Republic of China, Application No. 201120198393. 3 and the Chinese patent application of entitled " a kind of Combined water-containing measuring instrument " and the Chinese patent application for submitting Patent Office of the People's Republic of China, Application No. 201110158124. 9 and entitled " a kind of Combined water-containing measuring instrument " on June 2nd, 2011 using the present inventor on June 2nd, 2011.In the case of using the probe of the combined electrode structure, involved liquid level indicator and the integrating device 56 of profit component gage probe 601,602,603 can only pass through the spy of the combined electrode structure in example 3
Head is realized itself, because the probe can inherently realize the measurement to liquid level.The structure of above-mentioned probe is described as follows.
As shown in fig. 6, the Combined water-containing measuring instrument that this technology is related to, for measuring the mixed net content for depositing single-phase medium in medium tank of multiphase.The present embodiment is that aqueous multiphase is mixed to deposit medium in the tank deposited for measuring, moisture content in each horizontal media layer, therefore, also referred to as analyzer of water content array.It includes signal and data processing unit D5, support connection body D3, stretches into interior sensor, isolated insulation part D4, electic protection housing D6 being in contact with multiphase medium of container etc.; the first electrode D1 and second electrode D2 that described sensor is parallel to each other by the vertical direction, be spaced insulation in the horizontal direction are constituted, wherein：
First electrode D1 in the vertical directions are by one group of tubulose, separate conductive segment split pole
D101 is constituted, interfix and insulate by insulating fixing piece D102 between described section split pole D1 01, transverse shapes, the size of outer surface conductive each section of split pole D101 are identical, and are electrically connected by the section graded wire D1 03 on the inside of section split pole D101 with signal and data processing unit D5.
One layer of uniform insulating barrier D104 is wrapped up in whole first electrode D1 outside, for each section of split pole D1 01 to be kept apart with measured medium, meanwhile, the distortion of each section of split pole measurement signal will not be caused again.
Second electrode D2 in the vertical directions are with first electrode D1, between first electrode D1 and second electrode D2, the space that medium can be freed in and out is the measurement space of sensor, in the conductive side relative with first electrode D1, second electrode D2 each height transversary is identical, size consistent, and leave the passage for facilitating medium to pass in and out measurement space, electrically connect on the whole with signal and data processing unit D5.
The Combined water-containing measuring instrument of the present invention, in the horizontal direction, second electrode D2 is partly or intactly around first electrode 1;In vertical relation, first electrode D1 is parallel to each other with second electrode D2's.First electrode D1 isolates to be fixed together with second electrode D2 by isolated insulation part D4 constitutes the detection pole of sensor, i.e. first electrode 1 with the upper end of second electrode 2 by isolated insulation end socket 401, and lower end is isolated by isolated insulation plug 402 to be fixed.
Described signal and data processing unit D5, the detection pole of sensor, electic protection shell
Body D6 etc. is linked together by support connection body D3.
Second electrode D2 set by the present invention, can be identical by least one transversary, vertically the tubulose parallel with first electrode D1 or bar-shaped electric conductor are formed in parallel, some Zhi Guanzhuan or bar-shaped electric conductor D2 are linked together by connector D202, in the horizontal direction, second electrode part or intactly circular first electrode；Perforate Round tubular structures can also be hooked using side, the mode of perforate will ensure that the structure and area of the second electrode part relative with each section of split pole in first electrode should be unanimous on the whole.Second electrode D2 is electrically connected with signal and data processing unit D5 on the whole by second electrode lead D201.
Using tubulose or it is bar-shaped it is in parallel constitute second electrode benefit be, tubulose or bar-shaped electrode surface are easily processed to obtain smoother, and, the protruding point that each tube shape or bar-shaped electrode do not have block media to move on the vertical direction of surveying range can be ensured, so as to reduce the influence of bridging to greatest extent；This is significant when measurement has the crude oil emulsion of viscosity higher.
The mixed medium of depositing of multiphase in stable or poised state in knockout drum is in stratification state distribution, this is the precondition that technical scheme proposed by the invention is set up, the opposite segments of each section of split pole D1 01 and second electrode D2 on first electrode D1 constitute section sensor or are called aqueous measuring probe, the electric signal obtained by each section of sensor with the corresponding conjunction measuring of segment signal measurement circuitry 105, such as electric capacity, impedance etc., its property and size are different, signal and data processing unit 5 exactly judge the property of its place dielectric layer according to the electric signal difference that each section of split pole D101 conveying comes, and from which further follow that its moisture content, this requires that the relation of the signal and dielectric layer where it of each section of sensor is as big as possible, and it is as small as possible with the relation of adjacent dielectric, as shown in Figure 6, by demonstration, the size of this relation, the ratio between vertical height h depending on the minimum range d between first electrode D1 and second electrode D2 and section split pole D101 d/h, cylinder is referred to as width height ratio d/h, described width height ratio d/h is bigger, the signal of section sensor corresponding to each dielectric layer is influenceed bigger by adjacent dielectric, it is on the contrary, then influenceed just smaller by adjacent dielectric.By substantial amounts of experimental verification, it is contemplated that the minimum range d between bridging problem of the sensor between first electrode D1 and second electrode D2, two electrodes again can not be too small, generally the distance between first electrode and second electrode
The height h of section split pole in the vertical direction is should be less than, scheme preferably is that the vertical height of each section split pole is between 10 to 400 millimeters, and the minimum range d between two electrodes is between 5 to 300 millimeters.
Interval between adjacent segment split pole can be arranged to 0. 3 gangsters, and maximum does not exceed section classification height.
Constitute the height of the section split pole D101 in the vertical directions of first electrode, can be according to the corresponding size of requirement different choice of application scenario measurement accuracy, each section of split pole D101 its height in theory can be different, but it is preferred that scheme be using identical height so that the processing of cylinder data.
In technical scheme provided by the present invention, there is provided an external insulation layer D104 that first electrode D1 is uniformly wrapped up, it is to keep apart first electrode D1 with possible conductive measured medium that it, which is acted on, and reduces the process complexity of assembling sensor.It is in influence electrically equivalent to having concatenated a parasitic capacitive impedance element to measured medium, according to electronics principle, this parasitic electric capacity is that wherein smaller is dominant with the result that the capacitive reactances of measured medium is connected, because the relative dielectric coefficient of aqueous measured medium is usually than larger, typically greater than 3, so, compared with this parasitic capacitance, the capacitive reactances of measured medium is than larger, in order to reduce the influence of this parasitic capacitive impedance, need external insulation layer D104 thickness should be as thin as possible, as thickness is less than 1. 5 millimeters；Or, although external insulation layer D104 thickness is larger, but the relative dielectric coefficient of used insulating materials is also larger, such as use rubber, the epoxy resin of barium titanate doping, plastics, its relative dielectric coefficient is all higher than 3, to increase the capacitive reactances of external insulation layer as much as possible, so as to reduce the influence of spurious impedance to the full extent.As the case may be, the use of the material of the dielectric coefficient less than 3 is also possible, for example, in one embodiment, having used the material Ju tetra- Fu Yi Women that dielectric coefficient is 2.
One layer of uniform insulating barrier can be intactly coated with described first electrode D1 surfaces with the method or the mode of injection sprayed by setting described external insulation layer D1 04 concrete technology；Can also a kind of prefabricated insulation tube hooked with described first electrode D1 no-floats, distribution, on the first electrode, the mouth of pipe takes necessary seal approach to set.
It is only 0. 3 millimeters that one embodiment of the present of invention, which employs thickness, and fluoroplastics film of the relative dielectric coefficient less than 3 is as external insulation layer D1 04, and it is adhering closely to the outside of first electrode by way of injection.
An alternative embodiment of the invention employs thickness up to 2. 5 millimeters, but relative dielectric coefficient also be up to 30 earthenware as external insulation layer D1 04, it is located at the outside of first electrode by way of being closely set with, and the mouth of pipe is sealed using fluid sealant.
According to different materials, the dielectric film of different-thickness can be used.For example, in one embodiment, having used the dielectric film of 3 gangsters.
External insulation layer D1 04 of the present invention can also use rubber tube or plastic tube, and it is located at the outside of first electrode by way of being closely set with.
Second electrode D2 set by the present invention, can be as shown in Figure 7, it is identical by least one transversary, vertically the tubulose parallel with first electrode 1 or bar-shaped electric conductor are formed in parallel, some Zhi Guanzhuan or bar-shaped electric conductor 2 are linked together by connector 202, in the horizontal direction, second electrode part or intactly circular first electrode；Side uniform pore openings Round tubular structures can also be used, the mode of perforate will ensure that the structure and area of the second electrode part relative with each section of split pole in first electrode should be unanimous on the whole.Second electrode D2 is electrically connected with signal and data processing unit D5 on the whole by second electrode lead D201.
Using tubulose or it is bar-shaped it is in parallel constitute second electrode benefit be, tubulose or bar-shaped electrode surface are easily processed to obtain smoother, and, the protruding point that each tube shape or bar-shaped electrode do not have block media to move on the vertical direction of surveying range can be ensured, so as to reduce the influence of bridging to greatest extent；This is significant when measurement has the crude oil emulsion of viscosity higher.Note 1, a kind of produced liquid in oil well oil content metering method, it is characterized in that：Produced liquid in oil well inputs a vertical knockout drum by intake line, carried out in knockout drum after air-liquid separation, gas blanket is formed on separation tank body top, gas is defeated outside the gas export line through top, liquid is assembled in the knockout drum that tapping valve is closed and carries out profit sedimentation layering, forms the emulsified oil layer being located in the middle part of separation tank body and the free water layer positioned at bottom；It is provided with by knockout drum
Liquid level indicator measures innage；After liquid level reaches requirement height, produced liquid in oil well input time T is recorded;On the different specified altitudes of knockout drum vertical direction, several profit component gage probes are installed, the oil content of its place liquid level of each probe measurement, adjacent probes by-level face is set as the upper interface or lower interface of a liquid level, according to the physical dimension of knockout drum and probe it is set-mounted, thickness ^, the horizontal sectional area Si of liquid level where determining each probe, the oil content volume V of liquid level where calculating each probei, the oil content volume of liquid level is added where each probe, draws the oil production volume V oil of oil well in time T.
Note 2, a kind of produced liquid in oil well oil content metering device, provided with a vertical knockout drum, produced liquid in oil well intake line is respectively equipped with the top, bottom, top of knockout drum, liquid export line, gas export line, are respectively equipped with liquid feed valve, tapping valve, air bleeding valve on produced liquid in oil well intake line, liquid export line, gas export line；The liquid level indicator of monitoring liquid level is additionally provided with knockout drum, it is characterized in that：On the different specified altitudes of the knockout drum vertical direction, multiple profit component gage probes are installed.
Note 3, the produced liquid in oil well oil content metering device as described in note 2, it is characterized in that：Lateral cross-sectional area in the middle part of described separation tank body is the 5% to 80% of the lateral cross-sectional area of the separation tank body lower part.
Note 4, the produced liquid in oil well oil content metering device as described in note 2, it is characterized in that：Described profit component gage probe side is on described knockout drum.
Note 5, the produced liquid in oil well oil content metering device as described in note 2, it is characterized in that：Described profit component gage probe top is on described knockout drum.
Note 6, the produced liquid in oil well oil content metering device as described in note 2, it is characterized in that：Described profit component gage probe becomes one with liquid level indicator.
Note 7, the produced liquid in oil well oil content metering device as described in note 2, it is characterized in that：On gas export line, a gas flowmeter can also be set, the gas yield for measuring oil well in designated time section realizes the three phase metering to Oil, Water, Gas.
Note 8, the produced liquid in oil well oil content metering device as described in note 2, it is characterized in that：
It is provided with a data analysis and control unit, and described data analysis is electrically connected with control unit with each measuring instruments on described knockout drum, electric control valve.
Note 9, the produced liquid in oil well oil content metering device as described in note 2, it is characterized in that side wall in the middle part of the described separation tank body position corresponding with multiple profit component gage probes is respectively equipped with corresponding sampling line, corresponding valve is respectively equipped with each sampling line.
Note 10, the produced liquid in oil well oil content metering device as described in note 1, it is characterized in that the electronic display of each oil-water-layer moisture content or oil content can be shown by being electrically connected provided with one with each profit component gage probe.
Note 11, the produced liquid in oil well oil content metering device as described in note 1, it is characterized in that being provided with a fluid flowmeter on described liquid export line.
Note 12, the produced liquid in oil well oil content metering device as described in note 9, it is characterized in that being additionally provided with an online profit component measuring instrument concatenated with fluid flowmeter on described liquid export line.
Note 13, the produced liquid in oil well oil content metering device as described in note 1, it is characterized in that being provided with a mass flowmenter on described liquid export line.
Note 14, the produced liquid in oil well oil content metering device as described in note 1, it is characterized in that being provided with a positive displacement pump on described liquid export line.
15.-kind of produced liquid in oil well oil content metering method is attached, including：
Produced liquid in oil well is inputted into a vertical knockout drum by intake line, to assemble and carry out profit sedimentation layering, the emulsified oil layer being located in the middle part of separation tank body and the free water layer positioned at bottom is formed；
Liquid volume in knockout drum is divided into multiple liquid levels in horizontal direction along vertical direction, the volume of each liquid level is default；
The oil content of each liquid level is measured using profit component gage probe；
According to the volume of the oil content of measured each liquid level and each default liquid level, the oil content of the volume corresponding to the multiple liquid level is obtained.
The method of note 16, such as note 15, in addition to：The liquid level indicator being provided with by knockout drum measures innage；After liquid level reaches requirement height, produced liquid in oil well input time T is recorded;On the different specified altitudes of knockout drum vertical direction, several profit component gage probes are installed, the oil content of its place liquid level of each probe measurement, adjacent probes by-level face is set as the upper interface or lower interface of a liquid level, according to the physical dimension of knockout drum and probe it is set-mounted, thickness, the horizontal sectional area Si of liquid level where determining each probe, the oil content volume V of liquid level where calculating each probei, the oil content volume of liquid level is added where each probe, draws oil production volume V note 17, the method for such as note 15 of oil well in time τ, wherein, the height of each liquid level of the multiple liquid level is equal.
The method of note 18, such as note 15, wherein, the height of the profit component gage probe and the height of each liquid level are substantially identical.
Such as method of note 15 of note 19., wherein the knockout drum includes：
Top with the first height and the first lateral cross section；
Middle part with the second height and the second lateral cross section, and
Bottom with third height and the 3rd lateral cross section；
Wherein, according to the general proportions of the mixed water for depositing medium of the multiphase, oil, come the second lateral cross section, the ratio of the 3rd lateral cross section of bottom at the second height, the ratio of the third height of bottom and the middle part that set the middle part.
The method of such as claim 19 of note 20., wherein, the area of second lateral cross section at the middle part is less than the area of the 3rd lateral cross section of bottom.
The method of such as claim 19 of note 21., wherein, the area of second lateral cross section at the middle part is less than the area of first lateral cross section on top.
The method of such as claim 19 of note 22., wherein the lateral cross section bag includes Round tee sections.
Above detailed description of the invention and non-exclusive, the present invention is not restricted to precise forms disclosed above.It will be understood to those skilled in the art that within the scope of the invention, can carry out various equivalent modifications and replacement, such modification and replacement should be regarded as being covered by the invention.The element of each above-mentioned embodiment can be combined together, to provide further implementation technical scheme.In addition, the specific embodiment that the term used in appended claims should not be explained or limited the invention to disclosed in this explanation, unless the above detailed description section explicitly defines this term.Therefore, actual range of the invention should cover the embodiment and all equivalents implemented according to claim.
Claims (15)
- Claim1. a kind of produced liquid in oil well oil content metering method, including：Produced liquid in oil well is inputted into a vertical knockout drum by intake line, to assemble and carry out profit sedimentation layering, the emulsified oil layer being located in the middle part of separation tank body and the free water layer positioned at bottom is formed；Liquid volume in knockout drum is divided into multiple liquid levels in horizontal direction along vertical direction, the volume of each liquid level is default；The oil content of each liquid level is measured using profit component gage probe；According to the volume of the oil content of measured each liquid level and each default liquid level, the oil content of the volume corresponding to the multiple liquid level is obtained.2. method as claimed in claim 1, in addition to：The liquid level indicator being provided with by knockout drum measures innage；After liquid level reaches requirement height, produced liquid in oil well input time T is recorded;On the different specified altitudes of knockout drum vertical direction, several profit component gage probes are installed, the oil content of its place liquid level of each probe measurement, adjacent probes by-level face is set as the upper interface or lower interface of a liquid level, according to the physical dimension of knockout drum and probe it is set-mounted, thickness, the horizontal sectional area Si of liquid level where determining each probe, the oil content volume V of liquid level where calculating each probei, the oil content volume of liquid level is added where each probe, draws the oil production volume V of oil well in time T3. method as claimed in claim 1, wherein the knockout drum includes：Top with the first height and the first lateral cross section；Middle part with the second height and the second lateral cross section, andBottom with third height and the 3rd lateral cross section；Wherein, according to the general proportions of the mixed water for depositing medium of the multiphase, oil, come second lateral cross section at the second height, the ratio of the third height of bottom and middle part that the middle part is set, The ratio of 3rd lateral cross section of bottom.4. method as claimed in claim 3, wherein, the area of second lateral cross section at the middle part is less than the area of the 3rd lateral cross section of bottom.5.-kind of produced liquid in oil well oil content metering device, including a vertical knockout drum, produced liquid in oil well intake line is respectively equipped with the top, bottom, top of knockout drum, liquid export line, gas export line, are respectively equipped with liquid feed valve, tapping valve, air bleeding valve on produced liquid in oil well intake line, liquid export line, gas export line；It is characterized in that：On the different specified altitudes of the knockout drum vertical direction, multiple profit component gage probes are installed.6. such as produced liquid in oil well oil content metering device of claim 5, wherein the knockout drum includes：Top with the first height and the first lateral cross-sectional area；Middle part with the second height and the second lateral cross-sectional area, andBottom with third height and the 3rd lateral cross-sectional area；Wherein, according to the general proportions of the mixed water for depositing medium of the multiphase, oil, come the second lateral cross-sectional area, the ratio of the 3rd lateral cross-sectional area of bottom at the second height, the ratio of the third height of bottom and the middle part that set the middle part.7. produced liquid in oil well oil content metering device as claimed in claim 5, it is characterized in that：Described separation tank body second lateral cross-sectional area is the 5% to 80% of the 3rd lateral cross-sectional area.8. such as claim 5 produced liquid in oil well oil content metering device, it is characterized in that：Described profit component gage probe side is on described knockout drum.9. such as claim 5 produced liquid in oil well oil content metering device, it is characterized in that：Described profit component gage probe top is on described knockout drum.10. such as claim 5 produced liquid in oil well oil content metering device, in addition to the liquid level indicator being arranged on knockout drum, for measuring innage.11. such as claim 10 produced liquid in oil well oil content metering device, it is characterized in that：Described profit component gage probe becomes one with liquid level indicator.12. produced liquid in oil well oil content metering device as claimed in claim 5, it is characterized in that：Its Provided with a data analysis and control unit, described data analysis is electrically connected with control unit with each measuring instruments on described knockout drum, electric control valve.13. produced liquid in oil well oil content metering device as claimed in claim 5, it is characterized in that being respectively equipped with corresponding sampling line in the described separation tank wall position corresponding with multiple profit component gage probes, corresponding valve is respectively equipped with each sampling line.14. produced liquid in oil well oil content metering device as claimed in claim 5, it is characterized in that being provided with a fluid flowmeter on described liquid export line.15. produced liquid in oil well oil content metering device as claimed in claim 5, it is characterized in that being provided with a positive displacement pump on described liquid export line.
Priority Applications (1)
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| CN201280001771.1A CN102959366B (en) | 2011-03-28 | 2012-03-26 | Method and apparatus for measuring oil-content in production fluid |
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| CN201110087369.7 | 2011-03-28 | ||
| CN2011100873697A CN102706401A (en) | 2011-03-28 | 2011-03-28 | Method and device for measuring oil content of oil well produced liquid |
| CN201110158124.9 | 2011-06-02 | ||
| CN 201110158124 CN102809588A (en) | 2011-06-02 | 2011-06-02 | Combined moisture content measuring device |
| CN201280001771.1A CN102959366B (en) | 2011-03-28 | 2012-03-26 | Method and apparatus for measuring oil-content in production fluid |
| PCT/CN2012/073002 WO2012130112A1 (en) | 2011-03-28 | 2012-03-26 | Method and apparatus for measuring oil-content in production fluid |
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| CN102959366B CN102959366B (en) | 2014-06-11 |
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| US20130300574A1 (en) * | 2012-05-08 | 2013-11-14 | Logimesh IP, LLC | Remote monitoring unit with various sensors |
| CN105466094B (en) * | 2015-12-25 | 2018-05-01 | 珠海格力电器股份有限公司 | Liquid level detection system, the air-conditioning system and liquid level controlling method with the system |
| US10591441B2 (en) * | 2018-05-31 | 2020-03-17 | Battelle Memorial Institute | Oil content sensor |
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| WO2012130112A1 (en) | 2012-10-04 |
| CN102959366B (en) | 2014-06-11 |
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Address after: 264209, No. 213, Torch Road, hi tech District, Shandong, Weihai, C Patentee after: Weihai sea and electronic Polytron Technologies Inc Address before: 264209, No. 213, Torch Road, hi tech District, Shandong, Weihai, C Patentee before: Haihe Science &. Technology Co., Ltd., Weihai |