CN203374266U - Longitudinal multi-pole full-hole specific retention measurement conductivity sensor - Google Patents
Longitudinal multi-pole full-hole specific retention measurement conductivity sensor Download PDFInfo
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- CN203374266U CN203374266U CN201320294984.XU CN201320294984U CN203374266U CN 203374266 U CN203374266 U CN 203374266U CN 201320294984 U CN201320294984 U CN 201320294984U CN 203374266 U CN203374266 U CN 203374266U
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Abstract
The utility model discloses a longitudinal multi-pole full-hole specific retention measurement conductivity sensor which is used for measurement of specific retention of fluid under an oil well and is composed of a sensor support and N stainless steel electrode rings arranged in the support, wherein N=2M+1, and M is a positive integer which determines the number of exciting electrodes. The sensor support is made of insulating organic glass tubes, N concave circular grooves are formed in the inner wall of the sensor support at intervals, and each concave circular groove is inlaid with a stainless steel annular electrode, namely N-1 exciting electrodes E(j) and one exciting/measuring electrode E(0)/M(0), wherein j is a nonzero integer and |j|<=M. The longitudinal multi-pole full-hole specific retention measurement conductivity sensor aims to solve the problems that when a sensor which achieves well logging with the through annulus current collecting spot measuring method is used for specific retention measurement of the fluid under the oil well, depth-adaptive continuous measurement can not be achieved, and measurement results can be restricted by the collecting effect of a current collector under high flow. The longitudinal multi-pole full-hole specific retention measurement conductivity sensor has the advantages that measurement is not restricted by the reliability of the current collector, the natural state of the fluid under the oil well is not damaged, spot measurement and continuous measurement can be achieved at the same time, and measurement of perforation oil ingress of the oil well can be achieved due to the fact that the inner wall of an oil well sleeve of the sensor is sensitive to a certain degree.
Description
Technical field
The utility model relates to a kind of testing sensor, especially relates to a kind of vertical multipole full hole specific retention of measuring for the fluids underground specific retention and measures conductivity sensor.
Background technology
The dynamic monitoring important in inhibiting of the surveying work of oil well liquid-producing specific retention to oil field.The advantages such as that conductance type specific retention mensuration has is simple in structure, with low cost, fast response time, and to be highly suitable at water be to work under the continuous phase condition.Because current oil field at home is main mainly with machine-pumped oil well, existing specific retention is measured the logging mode that the conductivity sensor majority adopted annular space afflux point to survey, this mode can make the profit two-phase fully mix, and reduces slippage effect and the inhomogeneous impact on measuring of spatial distribution between profit.
But the collector type instrument can't realize in actual applications with degree of depth continuous measurement, and the afflux metering system can destroy the nature of oil well internal flow, reduced the objectivity that downhole fluid is estimated; When high flow capacity, the specific retention measurement result can be subject to the restriction of current collector catchment effect, if current collector is poorly sealed, will have a strong impact on the certainty of measurement of sensor.In addition, due to the logging mode that adopts afflux point to survey, therefore measuring point of every change, that all must carry out a current collector opens and packs up operation, and now current collector is difficult for guaranteeing in the uniformity of each measuring point work, makes the comparativity reduction of measurement result between each measuring point; And the operation of repeatedly repeatedly opening and pack up of current collector reduced the reliability that instrument uses, success log ratio is reduced.
The problem existed in oil well water capacity is measured in order to solve the collector type sensor, Liu Xingbin proposes a kind of full hole impedance sensor of continuous measurement, because the sensitivity interval of this sensor only concentrates near fraction zone excitation/measurement electrode, current density at the internal surface of sleeve pipe place is almost nil, so this sensor can not be measured for oil well perforation is fuel-displaced.
Summary of the invention
Downhole fluid is being carried out to when specific retention is measured in order to solve the sensor that adopted annular space afflux point to survey logging mode the series of problems existed, the utility model provides a kind of vertical multipole full hole specific retention to measure conductivity sensor, this sensor is not subject to the restriction of current collector reliability, does not destroy the nature of oil well inner fluid, can realizes the advantages such as a survey and continuous measurement simultaneously, and can be measured for oil well perforation is fuel-displaced while having measurement.
The technical solution of the utility model is: the vertical multipole full hole specific retention that this kind measured for the downhole fluid specific retention is measured conductivity sensor, by sensor stand and be built in the individual stainless steel electrode ring of N wherein (N=2M+1, M is for determining the positive integer of exciting electrode number) and form.Wherein, sensor stand adopts the insulation lucite tube to make, and process N (N=2M+1 within it on wall, M is for determining the positive integer of exciting electrode number) the individual spill annular groove that spacing is arranged, all inlay stainless steel ring-type electrode in each spill annular groove, (N-1) individual exciting electrode E (j) (j be nonzero integer and | j|≤M), an excitation/measurement electrode E (0)/M (0).For guaranteeing certainty of measurement, the height that should make spill annular groove on the sensor stand inwall is 2.1mm～4.1mm, the inside radius R of electrode retaining collar
1for 24mm～32mm, every pair of exciting electrode space D
efor 10mm～18mm, the space D of electrode E0/M0 and exciting electrode E (1), E (1)
mfor 20mm～30mm, electrode width S is 2.0mm～4.0mm.In order to be measured for oil well perforation is fuel-displaced, the number of poles N that should make sensor is 7～13, and sensor adopts even incentive mode.
The beneficial effect of this sensor is: this vertical multipole full hole specific retention is measured conductivity sensor and is comprised of N the stainless steel ring-type electrode of arranging at a certain distance, the electrode that wherein is arranged in middle is excitation/measurement electrode (E0/M0), other be exciting electrode.According to the state of electrode E0/M0, sensor can be divided into to even excitation and two kinds of mode of operations of strange excitation.Under even incentive mode, E0/M0, as measurement electrode, works in measuring state.Exciting current is applied to tested zone by electrode E (j), sets up responsive current field.At water, be under the continuous phase condition, measurement electrode M0 will detect the change at random of profit two phase concentrations, and the voltage signal that is inversely proportional to of output amplitude and fluid conductivity.Under strange incentive mode, E0/M0, both as exciting electrode, again as measurement electrode, works in excitation/measuring state.Now, on electrode E0 and E (j), jointly apply exciting current, in the well zone, to set up responsive current field, measurement electrode M0 will export the voltage signal with discrete oil phase particle size distribution and spatial distribution change at random.When practical logging, this sensor is occupy the shaft core position of pit shaft by righting, surveys or lower survey on carrying out under winch drives, thereby realizes that the point of oil well water capacity surveys and continuous measurement; Owing to not using current collector, can not destroy the nature of oil well inner fluid during measurement, measurement result also can not be subject to the restriction of current collector catchment effect.In addition, this sensor still has certain sensitivity at oil well casing inwall place, can be measured for oil well perforation is fuel-displaced.
The accompanying drawing explanation
Fig. 1 is the structural representation that vertical multipole full hole specific retention is measured conductivity sensor;
Fig. 2 is that vertical multipole full hole specific retention is measured conductivity sensor structural parameters figure;
Fig. 3 is that vertical multipole full hole specific retention is measured conductivity sensor driving circuit principle figure.
In Fig. 1, E (M), E (2), E (1), E (M), E (2), E (1) are exciting electrode, and E0/M0 is excitation/measurement electrode.
In Fig. 2, electrode retaining collar inside radius R
1for 24mm～32mm, every pair of exciting electrode space D
efor 10mm～18mm, the space D of electrode E0/M0 and exciting electrode E (1), E (1)
mfor 20mm～30mm, electrode width S is 2.0mm～4.0mm.
In Fig. 3, signal conditioning circuit consists of amplifying circuit, detecting circuit and filter circuit three parts.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is structural representation of the present utility model, the vertical multipole full hole specific retention that this kind measured for the downhole fluid specific retention is measured conductivity sensor, by sensor stand and be built in the individual stainless steel electrode ring of N wherein (N=2M+1, M is for determining the positive integer of exciting electrode number) and form.Wherein, sensor stand adopts the insulation lucite tube to make, and process N the spill annular groove that spacing is arranged within it on wall, all inlay ring electrode in each spill annular groove, (N-1) individual exciting electrode E (j) (j be nonzero integer and | j|≤M), an excitation/measurement electrode E (0)/M (0).For guaranteeing certainty of measurement, should make the altitude range of spill annular groove on the sensor stand inwall between 2.1mm～4.1mm, the width range of electrode retaining collar is between 2.0mm～4.0mm, the inside radius of electrode retaining collar is 24mm～32mm, the measurement electrode spacing is 20mm～30mm, and the exciting electrode spacing is 10mm～18mm.
Fig. 2 is structural parameters figure of the present utility model, and the vertical multipole full hole specific retention that this kind measured for the downhole fluid specific retention is measured conductivity sensor, for guaranteeing certainty of measurement, every pair of exciting electrode space D
ebe 10 mm～18mm, the space D of electrode E0/M0 and exciting electrode E (1), E (1)
mfor 20mm～30mm, electrode width S is 2.0mm～4.0mm.In order to be measured for oil well perforation is fuel-displaced, the number of poles N that should make sensor is 7～13, and sensor adopts even incentive mode.
Fig. 3 is driving circuit principle figure of the present utility model, under the ac-excited current source effect of sine-wave oscillator and voltage controlled current source formation, the output voltage on conductivity sensor measurement electrode surface will fluctuate with the variation of well inner fluid electrical conductivity, after signal conditioning circuit and voltage-frequency conversion circuit, by power driving circuit, moving communication to the ground host computer of profit electricity guided wave is processed.Wherein, signal conditioning circuit consists of amplifying circuit, detecting circuit and filter circuit three parts.
Claims (6)
1. vertical multipole full hole specific retention is measured conductivity sensor, it is characterized in that: N spill annular groove that spacing is arranged of processing on the sensor stand inwall, and N=2M+1 wherein, M is positive integer; Inlay ring electrode in each spill annular groove, wherein electrode E (j) is exciting electrode, j be nonzero integer and | j|≤M, E0/M0 is excitation/measurement electrode.
2. measure conductivity sensor according to vertical multipole full hole specific retention claimed in claim 1, it is characterized in that: sensor has two kinds of mode of operations, and a kind of is even incentive mode, and a kind of is strange incentive mode.
3. measure conductivity sensor according to vertical multipole full hole specific retention claimed in claim 2, it is characterized in that: under even incentive mode, E0/M0, as measurement electrode, works in measuring state; Under strange incentive mode, E0/M0, both as exciting electrode, again as measurement electrode, works in excitation/measuring state.
4. measure conductivity sensor according to vertical multipole full hole specific retention claimed in claim 1, it is characterized in that: on the sensor stand inwall, the height of spill annular groove is 2.1mm～4.1mm, the inside radius R of electrode retaining collar
1for 24mm～32mm.
5. measure conductivity sensor according to vertical multipole full hole specific retention claimed in claim 1, it is characterized in that: every pair of exciting electrode space D
efor 10mm～18mm, the space D of electrode E0/M0 and exciting electrode E (1), E (1)
mfor 20mm～30mm, electrode width S is 2.0mm～4.0mm; Preferred sensor electrode number N is 7～13, and sensor adopts even incentive mode.
6. measure conductivity sensor according to vertical multipole full hole specific retention claimed in claim 1, it is characterized in that: the sensor stand material is the insulation organic glass, and the material of electrode retaining collar is stainless steel.
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| CN201320294984.XU CN203374266U (en) | 2013-05-28 | 2013-05-28 | Longitudinal multi-pole full-hole specific retention measurement conductivity sensor |
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| CN201320294984.XU CN203374266U (en) | 2013-05-28 | 2013-05-28 | Longitudinal multi-pole full-hole specific retention measurement conductivity sensor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863581A (en) * | 2015-04-23 | 2015-08-26 | 中国石油天然气股份有限公司 | Circumferential conductance probe sensor and system for measuring dynamic full water value of horizontal well |
| CN107345482A (en) * | 2017-06-19 | 2017-11-14 | 天津大学 | A kind of oil-water two-phase flow oil-in-water emulsion specific retention differential pressure measurement method |
| CN108131136A (en) * | 2018-01-31 | 2018-06-08 | 中石化石油工程技术服务有限公司 | The integrated detection probe of water injection well in oil fields turbidity conductivity |
| CN108397188A (en) * | 2018-02-08 | 2018-08-14 | 天津大学 | Sensor for aqueous phase multiphase flow water phase conductivity measurement in upward vertical tube |
| CN109946347A (en) * | 2019-04-11 | 2019-06-28 | 燕山大学 | A kind of land face well head oil gas water three phase moisture percentage measuring apparatus |
| CN107677705B (en) * | 2017-06-19 | 2020-10-23 | 天津大学 | Method for measuring water holding rate of near-horizontal oil-water two-phase flow |
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2013
- 2013-05-28 CN CN201320294984.XU patent/CN203374266U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863581A (en) * | 2015-04-23 | 2015-08-26 | 中国石油天然气股份有限公司 | Circumferential conductance probe sensor and system for measuring dynamic full water value of horizontal well |
| CN104863581B (en) * | 2015-04-23 | 2018-02-02 | 中国石油天然气股份有限公司 | Circumferential conductance probe sensor and system for measuring dynamic full water value of horizontal well |
| CN107345482A (en) * | 2017-06-19 | 2017-11-14 | 天津大学 | A kind of oil-water two-phase flow oil-in-water emulsion specific retention differential pressure measurement method |
| CN107345482B (en) * | 2017-06-19 | 2020-08-18 | 天津大学 | Differential pressure measurement method for water holdup of oil-water two-phase flow oil-in-water emulsion |
| CN107677705B (en) * | 2017-06-19 | 2020-10-23 | 天津大学 | Method for measuring water holding rate of near-horizontal oil-water two-phase flow |
| CN108131136A (en) * | 2018-01-31 | 2018-06-08 | 中石化石油工程技术服务有限公司 | The integrated detection probe of water injection well in oil fields turbidity conductivity |
| CN108397188A (en) * | 2018-02-08 | 2018-08-14 | 天津大学 | Sensor for aqueous phase multiphase flow water phase conductivity measurement in upward vertical tube |
| CN108397188B (en) * | 2018-02-08 | 2021-06-29 | 天津大学 | Sensor for measuring water phase conductivity of water-phase multi-phase flow in vertical riser |
| CN109946347A (en) * | 2019-04-11 | 2019-06-28 | 燕山大学 | A kind of land face well head oil gas water three phase moisture percentage measuring apparatus |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20160528 |
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| CF01 | Termination of patent right due to non-payment of annual fee |