CN205301226U - A specific retention appearance for in producing well and impedance formula sensor thereof - Google Patents
A specific retention appearance for in producing well and impedance formula sensor thereof Download PDFInfo
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- CN205301226U CN205301226U CN201521127446.7U CN201521127446U CN205301226U CN 205301226 U CN205301226 U CN 205301226U CN 201521127446 U CN201521127446 U CN 201521127446U CN 205301226 U CN205301226 U CN 205301226U
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Abstract
The utility model relates to a production well log instrument, the utility model discloses a specific retention appearance for in the producing well, it is including a telluric electricity field (11) of interval arrangement in proper order, a measuring electrode (12), emitting electrode (13), the 2nd measuring electrode (14) and the 2nd telluric electricity field (15), emitting electrode (13) are used for launching drive signal, a telluric electricity field (11) are with the 2nd telluric electricity field (15) interconnect and be used for receiving drive signal, a measuring electrode (12) are with the 2nd measuring electrode (14) interconnect and be used for measuring fluid intermediate -current and voltage when drive signal flows through the fluid. The utility model discloses can effectively increase measuring accuracy and stability to resistivity, effectively increase the measuring range of specific retention appearance then, reduce measuring error.
Description
Technical field
This utility model relates to a kind of production well log instrument, has particularly related to a kind of for the water holdup tool in producing well.
Background technology
At present, domestic petroleum industry oil gas well mining enters the High water cut stage, impedance type retention rate instrument is applicable to highly aqueous gas well specific retention and measures, but domestic impedance type water holding instrument many employings four electrode resistance rate sensor, electrode signal is unstable, being subject to the impact of surrounding and housing, measurement error is bigger, it is impossible to real reaction oil gas well yield information.
Summary of the invention
The problems such as this utility model is little for the measurement scope of water holdup tool of the prior art, measurement error is big, it is provided that a kind of for the water holdup tool in producing well and impedance sensor thereof.
In order to solve above-mentioned technical problem, this utility model is addressed by following technical proposals:
Impedance sensor, including spaced apart first ground electrode successively, the first measurement electrode, emission electrode, the second measurement electrode and the second ground electrode, emission electrode is used for launching pumping signal, first ground electrode and the second ground electrode are connected with each other and all for receiving pumping signal, and the first measurement electrode and second is measured electrode and is connected with each other and all for detecting electric current and voltage in fluid when pumping signal flows through fluid.
By electrode will be measured with ground electrode about the symmetrical degree of accuracy that can be effectively improved resistivity measurement of emission electrode and stability in the application, simultaneously because subsurface environment is more severe, electrode retaining collar is easily stain thus causing cisco unity malfunction, and adopt the form that this kind be arranged symmetrically with, even if side electrode retaining collar cannot normal operation, opposite side electrode retaining collar still can normal operation, generally, the probability that both sides electrode retaining collar cannot work simultaneously is less, therefore can be effectively improved the work efficiency of this impedance sensor.
As preferably, this includes dead ring, the first ground electrode, first measures electrode, emission electrode, second measures and cut off by dead ring between electrode and the second ground electrode. By dead ring, each electrode separation is come, it is to avoid contact with each other between electrode, cause measurement result mistake.
As preferably, the first ground electrode and the second ground electrode are symmetrical about emission electrode, and it is symmetrical about emission electrode that the first measurement electrode and second measures electrode.Measure electrode all symmetrical about emission electrode with ground electrode, it is possible to reduce interference, increase degree of accuracy and the stability of sensor further.
As preferably, the first quantity measuring electrode and the second measurement electrode is two. Two first of emission electrode the same side measure and are not connected between electrode, and two second of same emission electrode opposite side measure and are also not connected between electrode. By being all provided with being set to two by the measurement electrode of emission electrode both sides, it is possible to be effectively increased stability and the accuracy of resistivity measurement.
For the impedance type water holdup tool in producing well, including the insulation shell for fluid flowing, also including impedance sensor, the first ground electrode, the first measurement electrode, emission electrode, the second measurement electrode and the second ground electrode interval successively are fixed on insulation shell inwall. By arranging the impedance sensor of this kind of structure in water holdup tool, the measurement scope of water holdup tool can being made effectively to increase, measurement error effectively reduces.
As preferably, also including impeller, impedance sensor is positioned at above impeller, and fluid mixes further through impeller, and the mixed fluid of secondary flows through impedance sensor, is conducive to improving the certainty of measurement of resistivity.
This utility model, owing to have employed above technical scheme, has significant technique effect:
This utility model adopts ground electrode, measurement electrode to be all symmetrically distributed in the impedance sensor of emission electrode both sides in water holdup tool, make it that measurement of resistivity is more accurate, stable, then effectively increase the measurement scope of water holdup tool, reduce measurement error.
Accompanying drawing explanation
Fig. 1 is the structural representation of water holdup tool in this utility model;
Fig. 2 is the structural representation of Fig. 1 middle impedance formula sensor.
The toponym that in accompanying drawing, each number designation refers to is as follows: 2 insulation shells, 3 impellers, 4 impeller housings, 5 insulation shell blocks, 11 first ground electrodes, 12 first measurement electrodes, 13 emission electrodes, 14 second measurement electrode, 15 second ground electrodes, 16 dead rings.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, this utility model is described in further detail.
Embodiment 1
Impedance sensor, as shown in Figure 2, including spaced apart first ground electrode 11 successively, first measures electrode 12, emission electrode 13, second measures electrode 14 and the second ground electrode 15, first ground electrode 11 and the second ground electrode 15 are symmetrical about emission electrode 13 simultaneously, first measurement electrode 12 and the second measurement electrode 14 are symmetrical about emission electrode 13, first quantity measuring electrode 12 and the second measurement electrode 14 is two, also include dead ring 16, first ground electrode 11, first measures electrode 12, emission electrode 13, cut off by dead ring 16 between second measurement electrode 14 and the second ground electrode 15, namely the side of emission electrode 13 is provided with two first and measures electrode 12 and first ground electrode 11 and two first measurement electrodes 12 between emission electrode 13 and the first ground electrode 11, the opposite side of emission electrode 13 is provided with two second and measures electrode 14 and second ground electrode 15 and two second measurement electrodes 14 between emission electrode 13 and the second ground electrode 15.
Wherein, emission electrode 13 is used for launching pumping signal, first ground electrode 11 and the second ground electrode 15 is connected with each other and the first ground electrode 11 and the second ground electrode 15 are all for receiving pumping signal, first measures electrode 12 measures electrode 14 with second and is connected with each other and first measures electrode 12 with the second measurement electrode 14 all for electric current and voltage in the detection fluid when pumping signal flows through fluid.
First ground electrode 11, first measures electrode 12, electrode 14 measured by emission electrode 13, second and the second ground electrode 15 is metal ring, allow fluid at impedance sensor internal circulation, so that the emission electrode 13 of impedance sensor produces signal, measurement electrode respectively through both sides arrives ground electrode, measure the current signal I between electrode and voltage signal U by gathering homonymy, the resistivity obtaining mixed liquor body can be calculatedBy measurement electrode and ground electrode are designed to the version symmetrical about emission electrode 13, it is possible to be effectively increased the stability of sensor.
On the other hand, in the present embodiment, ground electrode is relative with emission electrode 13 area receives electrode greatly, therefore can bear bigger electric current.
Embodiment 2
For the water holdup tool in producing well, as shown in Figure 1 and Figure 2, including the insulation shell 2 for fluid flowing, also include impedance sensor, wherein, impedance sensor includes first ground electrode the 11, first measurement electrode 12, emission electrode the 13, second measurement electrode 14 and the second ground electrode 15 that interval successively is arranged and is fixed on the inwall of insulation shell 2.
Wherein emission electrode 13 is used for launching pumping signal, first ground electrode 11 and the second ground electrode 15 are connected with each other and for receiving pumping signal, first measurement electrode 12 and the second measurement electrode 14 are connected with each other and are respectively positioned on the inside of insulation shell 2 for detecting the electrode of electric current and voltage impedance formula sensor in fluid when pumping signal flows through fluid, such that it is able to effectively reduce the impact that specific retention is measured by tool housing.
Also include impeller housing 4, it is connected with fluid in impeller housing 4, insulation shell block 5 it is provided with in impeller housing 4, insulation shell 2 is fixed on insulation shell block 5, first ground electrode 11, first measures electrode 12, electrode 14 measured by emission electrode 13, second and the second ground electrode 15 is metal ring so that fluid can at impedance sensor internal circulation.
Being provided with impeller 3 in impeller housing 4 and impedance sensor is positioned at above impeller 3, fluid mixes further when impeller 3, and the mixed fluid of secondary flows through impedance sensor, is conducive to improving the certainty of measurement of resistivity. Impeller housing 4 one end is connected with current collecting umbrella by lower contact, as inlet, other end tube wall has square window as liquid outlet; Turbine is installed in wire-passing tube one end, and the other end is connected with line joint.
During instrument work, first turn on current collecting umbrella, it is internal that fluid-mixing gathers impeller housing 4 by current collecting umbrella, liquid-driving impeller 3 rotates, rate of flow of fluid increases, and by the rotation of impeller 3, fluid mix homogeneously, the fluid of mix homogeneously flows through inside resistivity sensor, the emission electrode 13 of impedance sensor produces signal, measurement electrode respectively through both sides arrives ground electrode, measures the current signal I between electrode and voltage signal U by gathering homonymy, calculates the resistivity obtaining mixed liquor bodyThe mixing liquid entered in impeller housing 4 flows out from the liquid outlet of shell upper.
Close current collecting umbrella, enter into the liquid static layering within impeller housing 4 before, owing to oil density is little, it is mainly distributed on the upper strata of stratified liquid, water density is big, being distributed in the lower floor of stratified liquid, impedance sensor is arranged on water layer position according to measurement scope, measures resistivity of water �� according to the measuring principle of impedance sensor befores, the ratio of the resistivity of mixing liquid before the resistivity of water recorded after layering and layeringThe i.e. specific retention of fluid.The measurement electrode of impedance sensor and ground electrode are distributed in by the present embodiment the both sides of emission electrode 13, it is possible to be effectively increased the stability of this impedance sensor.
Embodiment 3
With embodiment 2, institute the difference is that, first ground electrode 11 and the second ground electrode 15 are symmetrical about emission electrode 13, first measurement electrode 12 and the second measurement electrode 14 are symmetrical about emission electrode 13, first quantity measuring electrode 12 and the second measurement electrode 14 is two, also include dead ring 16, first ground electrode 11, first measures electrode 12, emission electrode 13, cut off by dead ring 16 between second measurement electrode 14 and the second ground electrode 15, namely the side of emission electrode 13 is provided with two first and measures electrode 12 and first ground electrode 11 and two first measurement electrodes 12 between emission electrode 13 and the first ground electrode 11, the opposite side of emission electrode 13 is provided with two second and measures electrode 14 and second ground electrode 15 and two second measurement electrodes 14 between emission electrode 13 and the second ground electrode 15.
By measurement electrode and ground electrode are designed to the version symmetrical about emission electrode in the present embodiment, the stability of impedance sensor can be effectively increased, so that the measurement scope of this water holdup tool is up to 50% 100%, measurement error is less than �� 5%.
Utilizing the moisture content of the oil water mixture measuring different proportion in the present embodiment, measurement result is as shown in table 1.
The Novel resistor rate instrument that 1 one kinds of table is measured for water holding in producing well
| Sequence number | Liquid standard moisture content | Mixed liquor body resistivity | Stratified liquid resistivity | Measurement of water ratio value | Error |
| 1 | 96.0% | 2500 | 2425 | 97.0% | 1% |
| 2 | 94.3% | 2625 | 2450 | 93% | -1.3% |
| 3 | 91.4% | 2722 | 2425 | 89.1% | -2.3% |
| 4 | 90.4% | 2750 | 2425 | 90.0% | 0.4% |
| 5 | 90.2% | 2800 | 2500 | 89.3% | -0.9% |
| 6 | 88.7% | 2900 | 2500 | 86.2% | -2.5% |
| 7 | 83.8% | 3000 | 2500 | 83.3% | -0.5% |
| 8 | 80.0% | 3320 | 2500 | 75.3% | -4.7% |
| 9 | 78.4% | 3320 | 2525 | 76.1% | -2.3% |
In a word, the foregoing is only preferred embodiment of the present utility model, all equalizations made according to this utility model claim change and modify, and all should belong to the covering scope of this utility model patent.
Claims (7)
1. impedance sensor, it is characterized in that: include spaced apart first ground electrode (11) successively, first measures electrode (12), emission electrode (13), second measures electrode (14) and the second ground electrode (15), emission electrode (13) is used for launching pumping signal, first ground electrode (11) and the second ground electrode (15) are connected with each other and for receiving pumping signal, first measures electrode (12) is connected with each other with the second measurement electrode (14) and for detecting electric current and voltage in fluid when pumping signal flows through fluid.
2. impedance sensor according to claim 1, it is characterized in that: also include dead ring (16), the first ground electrode (11), first measure electrode (12), emission electrode (13), second measure between electrode (14) and the second ground electrode (15) by dead ring (16) partition.
3. impedance sensor according to claim 1, it is characterised in that: the first ground electrode (11) is symmetrical about emission electrode (13) with the second ground electrode (15).
4. impedance sensor according to claim 1, it is characterised in that: the first measurement electrode (12) is symmetrical about emission electrode (13) with the second measurement electrode (14).
5. impedance sensor according to claim 4, it is characterised in that: first measures electrode (12) is two with the second quantity measuring electrode (14).
6. for the water holdup tool in producing well, including the insulation shell (2) for fluid flowing, it is characterized in that: also include the impedance sensor described in claim 1, the first ground electrode (11), the first measurement electrode (12), emission electrode (13), the second measurement electrode (14) and the second ground electrode (15) interval successively are fixed on the inwall of insulation shell (2).
7. according to claim 6 for the water holdup tool in producing well, it is characterised in that: also including impeller (3), impedance sensor is positioned at impeller (3) top.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521127446.7U CN205301226U (en) | 2015-12-29 | 2015-12-29 | A specific retention appearance for in producing well and impedance formula sensor thereof |
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| CN201521127446.7U CN205301226U (en) | 2015-12-29 | 2015-12-29 | A specific retention appearance for in producing well and impedance formula sensor thereof |
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