CN1299970A - Oil well water capacity measuring instrument - Google Patents
Oil well water capacity measuring instrument Download PDFInfo
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- CN1299970A CN1299970A CN00112929A CN00112929A CN1299970A CN 1299970 A CN1299970 A CN 1299970A CN 00112929 A CN00112929 A CN 00112929A CN 00112929 A CN00112929 A CN 00112929A CN 1299970 A CN1299970 A CN 1299970A
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- measuring instrument
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- capacity measuring
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Abstract
The water holdup measuring apparatus utilizes needle probes which are distributed in space and extented into the fluid at omnibering of 360 deg. and measure the conductivity of fluid passing through the needle tip regions so as to discriminate oil and waterattribute of fluid of said regions. Said measuring apparatus is positioned at centre of oil well, through data processing, it can obtain mean water holdup data of whole cross-section. Said measuring apparatus is equipped with sidewall reservoir separation cover so as to reduce detection error of water holdup due to wall reservoir flow. Said invention can be used for measuring wide range of water holdup of oil well, can be used for measuring oil well whose water holdup is 100%, and can meet requirement for "annular space log".
Description
The present invention relates to a kind of oil well down-hole water holdup determinator.
In the produced fluid of each underground oil reservoir of Petroleum Production well, comprised different moisture ratios.For " diminishing increases oil ", rationally arrange the produced quantity of each oil reservoir, accurately " water holdup " of position, different layers position under the gage well.
Chinese patent " high-frequency electromagnetic vibration water capacity measuring instrument " (application number 92223160) is a kind of condenser type water capacity measuring instrument.It is extremely low that common condenser type water capacity measuring instrument is higher than sensitivity in 40% o'clock at water holdup.This patent has adopted frequency electromagnetic waves, has reduced the influence of local water conduction to instrumental sensitivity.Be higher than at water holdup under 40% the condition, instrument has higher sensitivity.Yet at the actual parameter of domestic high water holdup oil well, Petroleum Production requires the measurement range of water holdup is expanded to more than 99%, and this existing condenser type water capacity measuring instrument is difficult to realize.
The objective of the invention is to propose a kind of at the accurate oil well water capacity measuring instrument of " water holdup " parameter under the measuring well under the high water holdup state.
The feature of oil well water capacity measuring instrument of the present invention is to survey metal probe and the borehole wall oil reservoir separation hood that section is provided with space distribution at it; Oil well water capacity measuring instrument of the present invention adopts metal probe to carry out the measuring principle of oil, aqueous medium differentiation and statistical treatment, arrange metal probe at the whole measurement section of oil well, the conduction property of probe tip district fluid is flow through in measurement, differentiate the profit attribute of this district's fluid, ground logging system carries out the measurement statistics and the data processing of certain hour to the fluid properties that flows through the oil well water capacity measuring instrument probe region, obtains and measures full face average " water holdup " data of fluid.
The present invention is achieved in that
The one-piece construction of oil well water capacity measuring instrument of the present invention is a garden post shapes.It is made up of detection section, metering circuit section, Electromechanical Control section.The detection section of measuring instrument is in the middle part of instrument, and its lower end links to each other with the Electromechanical Control section, and the other end links to each other with the metering circuit section, forms a garden cylindrical device, and the instrument upper end is connected with ground logging system through cable.
Survey section by metal probe, set upright bracing frame and oil reservoir tripping device one borehole wall oil reservoir separation hood is formed.Survey section at instrument and radially be provided with metal probe in the position.
Set upright bracing frame and be arranged on the periphery of surveying section, be provided with borehole wall oil reservoir separation hood below metal probe measurement section, the lower edge of borehole wall oil reservoir separation hood is fixed on to be set upright on the bracing frame.
The metering circuit section is provided with surveys power supply, profit judging circuit, multi-channel transmission channel.
The Electromechanical Control section comprises motor, speed reduction unit.
Oil well water capacity measuring instrument is surveyed the metal probe that section is provided with and is sealed with insulating sleeve, and receives a direct current in the metering circuit section or exchange on the detection power supply with lead-in wire, and the needle point place exposes in detected fluid.
When probe pinpoint is wrapped up by oil, the resistivity height of oil, the electric current that flows through probe pinpoint is little.When it was wrapped up by water, resistivity of water was low, and the electric current that flows through probe pinpoint is big.The current value of probe pinpoint is flow through in measurement, and can differentiate probe pinpoint medium on every side is oil or water.The needle point of probe is downward, and in face of the direction of producing well produced fluid, needle point is in the oil sometimes, sometimes in water.
Excessive for the relative current of measuring position, probe place oil and water, need do the long period and measure and statistical average.Suppose that in one section selected Measuring Time T (being generally several minutes) time (being the time in the water) that probe is in big electric current is t
1, t
2... t
N, be total to N time period.According to the definition of " water holdup ", can draw the water holdup data Y
w
Select long measurement timing statistics T, can reduce formation oil, the error that the random fluctuation when aquatic products goes out causes.
Single metal probe can only be measured " water holdup " parameter that flows through probe pinpoint adjacent domain fluid.Because the factors such as pitch angle of the inhomogeneous and oil well that producing well oil outlet perforation distributes are measured in the transversal section at one, the distribution of oil and water is normally uneven.For oil, when water distribution is irregular, accurately measure oil, the aquatic products output of this section, the measuring probe of a greater number need be set, and, cover whole fluid section its even distribution.Oil well water capacity measuring instrument of the present invention adopts 360 ° of comprehensive and radially multi-turn distributions around instrument of many probes, can eliminate the detecting error of measuring oil, the inhomogeneous generation of water distribution in the section.
Utilization of the present invention is set upright bracing frame instrument is supported to the centre of well, and probe is stretched away from the instrument outer wall, enters the fluid main channel, makes its garden that is distributed in several different radiis on week, forms the better covering to whole fluid section.
The adhesion that another factor pockety is crude oil and casing wall when causing oil and water to flow in sleeve pipe.It can make part crude oil stick on the borehole wall, and the secondary flowage that makes progress.Because probe is in the oil well in the profit fluid-mixing, can not detect the oil body on the borehole wall, make " water holdup " parameter measurement produce additive error.Therefore, the present invention is (being the instrument below) before fluid enters the measurement section, an oil reservoir tripping device-borehole wall oil reservoir separation hood of being close to the borehole wall is set, it makes along the oil body of borehole wall secondary flowage and turns to, flow in the profit fluid-mixing of probe energy measurement, solved that water capacity measuring instrument in the past can not detect attached wall flow of oil and the water holdup measuring error that causes.
Water capacity measuring instrument of the present invention is compared with down-hole water capacity measuring instrument in the past, has the following advantages:
1. adopt the measuring principle of probe oil, aqueous medium differentiation and statistical treatment, when water holdup height to 100%, also can obtain accurate measurement data.When producing well crude oil yield ratio is low, as long as lengthening is measured timing statistics, record enough oily number of samples, just can reach necessary accuracy.
2. adopt 360 ° of comprehensive and radially multi-turn distributions around instrument of many probes, can eliminate the detecting error of measuring oil, the irregular even generation of water distribution in the section substantially.Adopt multiprobe also to reduce the random fluctuation error of measuring, can shorten and measure T.T..
3. adopt borehole wall oil reservoir tripping device, make along the oil reservoir of borehole wall secondary flowage to enter in the measurement range of probe, solved that water capacity measuring instrument in the past can not detect attached wall flow of oil and the water holdup measuring error that causes.
Adopt water capacity measuring instrument of the present invention under high water holdup state, to realize the accurate measurement of down-hole water holdup (or oil holdup) with short Measuring Time.
With reference to the accompanying drawings oil well water capacity measuring instrument of the present invention is described in further detail below.
Fig. 1 is oil well water capacity measuring instrument one-piece construction and down-hole user mode synoptic diagram;
Fig. 2 is many metal probe needle points of an oil well water capacity measuring instrument transversal section position distribution synoptic diagram;
Fig. 3 is oil well water capacity measuring instrument single needle formula probe structure and principle of work synoptic diagram;
Fig. 4 is oil well water capacity measuring instrument two pointer type probe structure and principle of work synoptic diagram;
Fig. 5 is one of an oil well water capacity measuring instrument borehole wall oil reservoir separation hood structure synoptic diagram;
Fig. 6 is two synoptic diagram of oil well water capacity measuring instrument borehole wall oil reservoir separation hood structure;
Fig. 7 is an oil well water capacity measuring instrument circuit theory synoptic diagram;
Among the figure: 1. survey section; 2. metering circuit section; 3. Electromechanical Control section; 4. set upright bracing frame; 5. probe support; 6. probe pinpoint; 7. borehole wall sleeve pipe; 8. oil reservoir separation hood; 9. tool housing; 10. detection power supply; 11. resistance; 12. profit judging circuit; 13. insulating sleeve; 14. grounded probe; 15. multi-channel transmission channel; 16. ground logging system.
Fig. 1 uses view, oil well for overall structure and the down-hole of oil well water capacity measuring instrument of the present invention Water capacity measuring instrument integral body is a garden post shapes. It is by surveying section (1), measuring circuit section (2), Electromechanical Control section (3) form.
The detection section (1) of measuring instrument is in the middle part of instrument, and its lower end links to each other with Electromechanical Control section (3), in addition One end links to each other with measuring circuit section (2), forms a garden cylindrical device, and the diameter of instrument little (φ 26mm) is full The requirement of foot " annular space log ". The instrument upper end is connected with ground logging system (16) through cable.
Survey section (1) by metal probe, centralizing support frame (4) and oil reservoir separator-borehole wall oil reservoir separation hood (8) Form. Survey section (1) at instrument and radially be provided with metal probe in the position, before going into the well, centralizing support frame (4) draws in, Probe is parallel with tool housing (9), and after going into the well, centralizing support frame (4) is opened, and probe support (5) stretches, and forms The probe measurement section. According to different oil well situations, set two kinds of probe structures, namely single needle formula probe and The two pointer type probe structure. Fig. 3 is single needle formula probe structure figure, and its connecting lead wire and metal probe are sealed insulation Sleeve pipe (13), probe pinpoint (6) is exposed, and metal probe is received (2) in the measuring circuit section by lead-in wire. Fig. 4 is Two pointer type probe structure figure, in this structure, a probe structure is identical with single needle formula probe, and another probe reaches Lead-in wire connects tool housing (9), and two probe pinpoints (6) are at a distance of 0.5-3mm. Whole specific retention is surveyed section Structure be a plurality of probes in the spatial distribution setting, and Central Symmetry is evenly arranged in a garden week of measuring section Or the different a plurality of gardens of radius are on week. Fig. 2 adopts probe pinpoint (6) down well placement of 12 probes to distribute Figure. Probe divides two circles to be arranged between instrument detection section (1) and the borehole wall sleeve pipe (7), and 8 probes are settled in the outer ring, Inner ring is settled 4 probes, and inside and outside two-layerly mutually stagger on angle distribution, Central Symmetry covers whole equably Individual fluid section.
Centralizing support frame (4) is arranged on the periphery of surveying section (1), is provided with below metal probe measurement section Borehole wall oil reservoir separation hood (8), the lower edge of borehole wall oil reservoir separation hood (8) is fixed on the centralizing support frame (4).
One of borehole wall oil reservoir separation hood (8) structure as shown in Figure 5, its effect makes along the borehole wall slippage that makes progress Oil reservoir leaves casing wall, gets back in oil, the water fluid-mixing. Separation hood be shaped as inverted funnel-form, cover The lower edge by centralizing support frame (4) it is close on the borehole wall, the outlet of the top of cover is littler than following import, Fluid will be assembled to the middle part of well after by separation hood. Attach the borehole wall oil wall that drives a well of wandering about as a refugee in order to make, and Do not produce again big down-hole variations in flow patterns, the height of cover little (about 10mm), about 45 ° of the positive pitch of cover. To leave the borehole wall more uniform when entering fluid-mixing along the oil stream that the separation hood inwall upwards flows in order to make Distribute and scatter, the upper edge of cover is designed to corrugated.
Borehole wall oil reservoir separation hood (8) structure of oil well water capacity measuring instrument of the present invention two as shown in Figure 6. For Obtain accurately specific retention measurement, separation hood must be assigned to the oil reservoir stream of the borehole wall in the fluid section more uniformly Go. This separation hood has the aperture of edge distribution and the macropore in centre, and it makes along the separation hood inwall upwards The oil stream that flows has wider radial position and distributes when entering fluid-mixing, it is more equal that oil, water are mixed to get Even, it is more accurate that the specific retention parameter measurement is got.
The material of separation hood adopts thin cloth, when instrument is gone into the well and carry, by the centralizing support frame separation hood is received Cage.
Measuring circuit section (2) is by the electric conductivity of metal probe mensuration probe pinpoint (6) region fluid, through oil Ground logging system (16) is processed and transported to water judging circuit (12) with data.
Fig. 7 is oil well water capacity measuring instrument circuit theory schematic diagram, the measurement of water capacity measuring instrument of the present invention Circuit section (2) comprises surveys power supply (10), profit judging circuit (12), multi-channel transmission channel (15). Circuit working Principle is as follows:
Survey power supply (10) voltage VVisitBe added to probe pinpoint (6) through resistance R, with 1/2VVisitAs reference voltage VRBe added to a differential input terminal of profit judging circuit. When probe pinpoint (6) is in the oil, the ground connection of probe Resistance value ROilResistance value R in the circuit, the input voltage at probe place is much larger than reference voltage VR Oil Water judging circuit (12) can adopt " operational amplifier " integrated circuit, and probe pinpoint (6) is in oil the time, profit Judging circuit (12) output high level (logical one). When probe pinpoint (6) is in the water, the ground connection electricity of probe Resistance RWaterResistance value R in the circuit, the input voltage at probe place is much smaller than reference voltage VR Profit Judging circuit (12) output low level (logical zero).
When instrument adopts branched probe, the logic output letter of the profit judging circuit (12) of respective number is arranged Number. For through single-cord well logging cable signal transmission earthward, need through the backward ground of multi-channel transmission channel (15) combination The face transmission.
Electromechanical Control section (3) comes control instrument to open in well and receive cage and set upright by ground logging system (16) Bracing frame (4) and probe.
When measuring oil well water capacity, with oil well water capacity measuring instrument of the present invention, put into by cable and to be logged well In, by ground logging system (16) control, Electromechanical Control section (3) in the down-hole centralizing support frame (4) strutted to Borehole wall sleeve pipe (7) makes instrument remain on the well center position, and simultaneously, Electromechanical Control section (3) also makes all metals Probe support stretches, and makes whole probes cover more equably whole fluid section, and probe pinpoint (6) is exposed shape.
The borehole wall oil reservoir separation hood (8) that arranges below the probe measurement section is also along with centralizing support frame (4) Strut and stretch, it makes along the oil reservoir of borehole wall gaseous Slip Flow and enters the observable oil of probe, water fluid-mixing In; When probe pinpoint (6) with after liquid contacts, survey section (1) and survey the voltage of power supply and be added to probe pinpoint (6) through resistance, Get back to tool housing (9) through the conductivity water MEDIA FLOW, form loop current, at this moment, surveying section (1) distribution Branched probe pinpoint (6) oil, the aqueous medium signal that obtain process through measuring circuit section (2), pass through cable then Be passed to ground, do data analysis, demonstration, record and storage by ground logging system (16). Through selecting The measurement timing statistics after, underground survey work is complete, ground logging system (16) is received cage by cable and is held up Positive bracing frame (4) and metal probe make its reposition, and instrument goes out well.
Embodiment 1:
Oil well water capacity measuring instrument is a cylindrical shape, and it is made up of detection section (1), a metering circuit section (2), Electromechanical Control section (3).The detection section (1) of measuring instrument is in the middle part of instrument, and its lower end links to each other with Electromechanical Control section (3), and the other end links to each other with metering circuit section (2), and the instrument upper end is connected with ground logging system (16) through cable.
Survey section (1) by metal probe, set upright bracing frame (4) and oil reservoir tripping device-borehole wall oil reservoir separation hood (8) is formed.Instrument survey section (1) radially the metal probe that is provided with of position be 12 probes of single needle formula probe structure.Fig. 2 is probe pinpoint (6) the down well placement distribution plan that adopts 12 probes.Probe and all seal with insulating sleeve (13) from the probe lead that metering circuit section (2) is stretched out only exposes probe pinpoint (6).
Set upright bracing frame (4) and be arranged on the periphery of surveying section (1), below metal probe measurement section, be provided with borehole wall oil reservoir separation hood (8), the upper edge of cover is set to corrugated, and the lower edge of borehole wall oil reservoir separation hood (8) is fixed on to be set upright on the bracing frame (4).
Fig. 3 is single needle formula probe structure and principle of work synoptic diagram.When probe pinpoint (6) with after water contacts, the voltage of surveying power supply (10) is added to probe pinpoint (6) through resistance (11), gets back to tool housing (9) through the conductivity water MEDIA FLOW, forms loop current.And when probe pinpoint (6) was in oil, its loop current was minimum.Oil, water judging circuit (12) are differentiated needle point according to the size of current of the resistance (11) of flowing through and are in the oil still in water.Oil, water judging circuit (12) adopt integrated operational amplifier.In order to transmit the profit judgment signal that No. 12 probes produce, adopt two " eight select a digital integrated circuit " to be combined as multi-channel transmission channel (15).Single needle formula probe structure is simple, is particularly suitable for measuring the higher producing well of water holdup.
Embodiment 2:
Present embodiment 2 is for adopting the oil well water capacity measuring instrument of 12 two pointer type probes, and Fig. 1 is its one-piece construction synoptic diagram, and Fig. 2 is 12 probe tip down well placement distribution schematic diagrams, and Fig. 4 is two pointer type probe structure and principle of work synoptic diagram.Its range of application is not subjected to the restriction of down-hole water holdup size, promptly can use under the condition of oil well down-hole water holdup 0-100%.A probe in two probes is identical with single needle formula probe structure, probe outsourcing insulating sleeve (13), and another root grounded probe (14) is connected with tool housing (9), its lead-in wire and probe can expose in fluid.The needle point of two pins is at a distance of 1mm.One-piece construction is with embodiment 1.When two needle points were wrapped up by same water body (or globule), the voltage of surveying power supply (10) was added to probe pinpoint (6) through resistance (11), gets back to grounded probe (14) through the conductivity water medium, formed loop current.When probe pinpoint (6) was in oil, its loop current was minimum.The principle of work of profit judging circuit (12) is identical with embodiment 1.
Oil well water capacity measuring instrument of the present invention, the metal probe of space distribution can be single needle formula probe structure, two pointer type probe structure or part and adopt single needle formula probe structure and part to adopt the combination of two pointer type probe structure.
Oil well water capacity measuring instrument of the present invention can be used under low water holdup condition, more is applicable to water holdup parameter under accurate measuring well under the high water holdup state.The requirement that this instrument volume is little, can satisfy " annular space log ", and easy to use adapts to the demand of the high water holdup oil well production well logging of China especially.
Claims (9)
1, a kind of oil well water capacity measuring instrument comprises and surveys section (1), metering circuit section (2) and Electromechanical Control section (3), it is characterized in that the section of detection is provided with the metal probe and the borehole wall oil reservoir separation hood (8) of space distribution.
2, water capacity measuring instrument according to claim 1 is characterized in that when the metal probe of space distribution is single needle formula probe structure, and probe connects lead-in wire and metal probe is sealed insulating sleeve (13), and probe pinpoint (6) is exposed.
3, water capacity measuring instrument according to claim 1, it is characterized in that when the metal probe of space distribution is the two pointer type probe structure, a probe structure is identical with single needle formula probe, and another probe and lead-in wire connect tool housing (9), and two probe pinpoints (6) are at a distance of 0.5-3mm.
4, water capacity measuring instrument according to claim 1 is characterized in that the metal probe of space distribution, is evenly arranged in same garden week of measuring section or a plurality of different gardens on week.
5, water capacity measuring instrument according to claim 4 is characterized in that the metal probe of space distribution can be single needle formula probe structure.
6, water capacity measuring instrument according to claim 4 is characterized in that the metal probe of space distribution can be the two pointer type probe structure.
7, water capacity measuring instrument according to claim 4 is characterized in that the metal probe of space distribution can partly adopt single needle formula probe structure, part to adopt the two pointer type probe structure.
8, water capacity measuring instrument according to claim 1 is characterized in that borehole wall oil reservoir separation hood (8) is an inverted funnel-form pocket, and the borehole wall is close in its lower edge, and its upper edge is a big fluid outlet.
9, borehole wall oil reservoir separation hood according to claim 8 (8) is characterized in that the upper edge of borehole wall oil reservoir separation hood (8) is designed to corrugated or adds a plurality of rill body outlets in the skirt body portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00112929A CN1131427C (en) | 2000-05-15 | 2000-05-15 | Oil well water capacity measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00112929A CN1131427C (en) | 2000-05-15 | 2000-05-15 | Oil well water capacity measuring instrument |
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| Publication Number | Publication Date |
|---|---|
| CN1299970A true CN1299970A (en) | 2001-06-20 |
| CN1131427C CN1131427C (en) | 2003-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00112929A Expired - Fee Related CN1131427C (en) | 2000-05-15 | 2000-05-15 | Oil well water capacity measuring instrument |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105243220A (en) * | 2015-10-26 | 2016-01-13 | 中国海洋石油总公司 | Method for eliminatinginfluences of annulus internal liquid in RPM-C/O well logging |
| CN104089178B (en) * | 2010-09-10 | 2016-09-14 | 瓦锡兰芬兰有限公司 | For connecting the tubing to the attachment means of LNG tank |
| CN113588600A (en) * | 2021-07-29 | 2021-11-02 | 杭州瑞利测控技术有限公司 | Oil-gas-water three-phase detection device and method based on optical fiber |
-
2000
- 2000-05-15 CN CN00112929A patent/CN1131427C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089178B (en) * | 2010-09-10 | 2016-09-14 | 瓦锡兰芬兰有限公司 | For connecting the tubing to the attachment means of LNG tank |
| CN105243220A (en) * | 2015-10-26 | 2016-01-13 | 中国海洋石油总公司 | Method for eliminatinginfluences of annulus internal liquid in RPM-C/O well logging |
| CN105243220B (en) * | 2015-10-26 | 2018-06-19 | 中国海洋石油总公司 | The method that fluid influences in annular space is eliminated in RPM-C/O well loggings |
| CN113588600A (en) * | 2021-07-29 | 2021-11-02 | 杭州瑞利测控技术有限公司 | Oil-gas-water three-phase detection device and method based on optical fiber |
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| Publication number | Publication date |
|---|---|
| CN1131427C (en) | 2003-12-17 |
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