CN104501906A - Series resistance type underground oil-water interface detection system controlled by pressure-controlled switch - Google Patents
Series resistance type underground oil-water interface detection system controlled by pressure-controlled switch Download PDFInfo
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- CN104501906A CN104501906A CN201410841630.1A CN201410841630A CN104501906A CN 104501906 A CN104501906 A CN 104501906A CN 201410841630 A CN201410841630 A CN 201410841630A CN 104501906 A CN104501906 A CN 104501906A
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Abstract
The invention provides a series resistance type underground oil-water interface detection system controlled by a pressure-controlled switch. The series resistance type underground oil-water interface detection system controlled by the pressure-controlled switch comprises a ground detector and an oil-water interface detection sensor group, wherein the oil-water interface detection sensor group is connected with the ground detector through an armor cable, and is composed of five oil-water interface detection sensors. By virtue of the series resistance type underground oil-water interface detection system controlled by the pressure-controlled switch, which is composed of the five oil-water interface detection sensors and the ground detector, an underground oil-water interface can be measured; continuous measurement of the underground oil-water interface is achieved; the detection depth and the measurement accuracy of the underground oil-water interface are improved; the lifting frequency of a cavity-building outer pipe is reduced; the cavity-building cost is reduced; the measurement requirements of a novel cavity-building engineering technology for building cavities in reverse circulation on the underground oil-water interface are met.
Description
Technical field
The present invention makes chamber field of engineering technology about salt hole air reserved storeroom, particularly about the detection technique at the protective seam interface for controlling underground salt cave cavity geometry, is that a kind of votage control switch controls series electrical resistive underground oil-water interface detection systems concretely.
Background technology
Salt hole air reserved storeroom make chamber engineering be used to complete the work of creeping into make chamber well, in the salt deposit of down-hole, fresh water is injected continuously pipe from making in chamber, bittern is transformed into by dissolving rock salt, again by bittern by making in chamber pipe and the annular space made between the outer tube of chamber is expelled to ground continuously, thus the storage area forming certain volume specific modality in the salt deposit of down-hole is as gas storage.Making in the process of chamber; in order to ensure that this storage area reaches designing requirement; the diesel oil injected in the annular space making chamber outer tube and production casing and the borehole wall as protective layer material is needed to arrive the depth location of engineering design; effectively to control the depth range of fresh water dissolution rock salt; what control salt hole air reserved storeroom makes chamber process, until complete salt hole air reserved storeroom to make chamber engineering.
The water-oil interface detection method of current employing is water-oil interface sensor to be arranged on to be made on the outer tube outer wall of chamber, with making chamber outer tube RIH.Water-oil interface sensor is connected with ground checkout equipment by cable, can detect injection diesel oil and whether arrive projected depth, to adjust in time, ensures that safety makes chamber.
Making in the process of chamber, along with cavity increases, the projected depth of water-oil interface needs constantly to adjust upward, and scope can reach tens of rice.Existing detector for oil-water interface is generally that use cable connects 1 detecting sensor and carries out water-oil interface detection.For meeting the needs making chamber process water-oil interface detection up to tens of meters of salt hole air reserved storerooms, must pass through in engineer operation constantly and carrying installation tubing string, adjustment detecting sensor depth location, to meet the requirement of underground oil-water Interface detection depth range.This situation significantly increases the use cost of detector for oil-water interface, is unfavorable for applying of detector for oil-water interface.For expanding the sensing range of detector for oil-water interface, a cable series connection can be adopted to connect 3 detecting sensors, being separated by according to requirement of engineering between 3 detecting sensors, certain length is interval to be installed, expand water-oil interface sensing range, decrease to carry and tubing string engineer operation number of times is installed, reduce salt hole air reserved storeroom and make chamber engineering cost.But 3 detecting sensor detection water-oil interface are still on the low side, should increase the quantity of downhole detection sensor when development new technologies as far as possible.Meanwhile, downhole detection sensor long period of soaking is in bittern, and the stube cable between the web member of sensor and cable and sensor exists and slightly leaks electricity, and affects the normal measurement of water-oil interface, must seek the technical scheme eliminating effect of leakage.On the other hand, China's part salt hole air reserved storeroom construction, more than the well depth of 3000 meters, should take into account the high pressure of deep-well, high-temperature work environment to the technical requirement of downhole detection sensor simultaneously when developing water-oil interface new detecting technique.
Above-mentioned detector for oil-water interface adopts a cable series connection to connect 3 downhole detection sensors, expands water-oil interface sensing range, decreases to carry to install tubing string engineer operation number of times, reduces salt hole air reserved storeroom and makes chamber engineering cost.But in actual applications, generally application is installed after 1 year at detector for oil-water interface, because the stube cable between downhole detection sensor is in the bittern of High Temperature High Pressure for a long time, occurs aging, there is slight electric leakage in various degree.And the web member be in for a long time with cable in the detecting sensor in High Temperature High Pressure bittern, also because aging appearance is slightly leaked electricity.The impact of two aspect electric leakages, will cause detector for oil-water interface normally to work.
Two aspects electric leakages to affect detailed process as follows: carry out water-oil interface when detecting, when first using the 1st, bottom detecting sensor to carry out water-oil interface detection, the stube cable between measurement cable, all detecting sensors and the web member of all detecting sensors and cable are all in diesel oil.Due to the insulating effect of diesel oil, the slight electric leakage of above-mentioned existence all disappears, and normally detecting water-oil interface to the 1st, bottom detecting sensor does not affect.When using the 2nd detecting sensor above the detecting sensor of the 1st, bottom to carry out water-oil interface detection, cable connectors in the detecting sensor of the 1st, bottom and stube cable are in bittern all slight electric leakage, normally detects water-oil interface have an impact to the 2nd detecting sensor.When using the 3rd detecting sensor above the detecting sensor of the 2nd, bottom to carry out water-oil interface detection, cable connectors in the 1st, bottom detecting sensor and the 2nd detecting sensor and stube cable are in bittern all slight electric leakage, normally detects water-oil interface produce larger impact to the 3rd detecting sensor.The chamber engineering in general of making of a salt hole air reserved storeroom needs can complete for 5 to 6 years, and underground oil-water interface detector must ensure normally can detect water-oil interface all the time during this period.When these electrical leakage quantities exceed allowable value, detector for oil-water interface will be caused cannot to carry out the normal detection of water-oil interface.
Summary of the invention
In order to the detector for oil-water interface solving water-oil interface detection scheme in prior art cannot meet the difficult problem that underground oil-water Interface detection depth range requires, the invention provides a kind of votage control switch and control series electrical resistive underground oil-water interface detection systems, by arranging testing circuit and stainless steel contact on base plate, achieve and normally can complete testing for a long time in the hot environment of 100 DEG C and the hyperbaric environment of 30Mpa, the construction adapting to China's salt hole air reserved storeroom has started to develop to deep-well, to the oil-water interface detection sensor of the more high performance requirements use that the checkout equipment of water-oil interface proposes, the votage control switch that is made up of 5 oil-water interface detection sensors and ground detector controls series electrical resistive underground oil-water interface detection systems can water-oil interface under measuring well, realize the continuous coverage at underground oil-water interface.
The object of the invention is, provide a kind of votage control switch to control series electrical resistive underground oil-water interface detection systems, comprise a ground detector; One oil-water interface detection sensor group, is connected with described ground detector by sheathed cable; Described oil-water interface detection sensor group is made up of 5 oil-water interface detection sensors.
Preferably, 5 described oil-water interface detection sensors are connected mutually.
Preferably, described oil-water interface detection sensor comprises: base plate; Be arranged on the testing circuit on described base plate, described testing circuit comprises multiple resistor and multiple diode, and each described resistor one end is in parallel, the other end is connected with the negative terminal of diode described in; Be embedded in the multiple stainless steel contacts on described base plate, each described stainless steel contact is connected with the anode of diode described in.
Preferably, the quantity of described resistor is identical with the quantity of the quantity of described diode, described stainless steel contact.
Preferably, the quantity of described resistor is 5.
Preferably, described oil-water interface detection sensor also comprises the cable seal web member being arranged on upper end.
Preferably, described oil-water interface detection sensor also comprises the cable seal web member being arranged on upper end, the cable seal web member being arranged on bottom.
Preferably, described oil-water interface detection sensor also comprises the votage control switch between parallel wire and the cable seal web member of described bottom being arranged on described resistor.
Preferably, described base plate is made up of resin-based insulating material.
Preferably, described stainless steel contact is wafer type, forms by inlaying the contact that is solidificated on described backplate surface and inlaying the round bar portion be solidificated in described base plate.
Preferably, the thickness of described oil-water interface detection sensor is less than 20 millimeters, and most high sealing is withstand voltage is 30Mpa, and it is 3000 meters that maximum oil water termination detects the degree of depth, and maximum operating temperature is 100 DEG C.
Preferably, described sheathed cable is single core sheathed cable.
Preferably, described ground detector comprises voltage stabilizing and detects power supply, detects the detection reometer that power supply is connected and the detector switch be connected with described detection reometer with described voltage stabilizing.
Beneficial effect of the present invention is, provide a kind of votage control switch and control series electrical resistive underground oil-water interface detection systems, by arranging testing circuit and stainless steel contact on base plate, achieve and normally can complete testing for a long time in the hot environment of 100 DEG C and the hyperbaric environment of 30Mpa, the construction adapting to China's salt hole air reserved storeroom has started to develop to deep-well, to the oil-water interface detection sensor of the more high performance requirements use that the checkout equipment of water-oil interface proposes, the votage control switch that is made up of 5 oil-water interface detection sensors and ground detector controls series electrical resistive underground oil-water interface detection systems can water-oil interface under measuring well, realize the continuous coverage at underground oil-water interface, improve underground oil-water Interface detection depth range and measuring accuracy, reduce to make on the outer tube of chamber and carry number of times, reduce and make chamber cost, meet reacting cycle make chamber new make the measurement requirement of chamber engineering to underground oil-water interface.
For above and other object of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate institute's accompanying drawings, be described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structured flowchart of the embodiment one of the oil-water interface detection sensor of a kind of votage control switch control series electrical resistive underground oil-water interface detection systems that Fig. 1 provides for the embodiment of the present invention;
The structured flowchart of the embodiment two of the oil-water interface detection sensor of a kind of votage control switch control series electrical resistive underground oil-water interface detection systems that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 is the outside drawing that a kind of votage control switch provided by the invention controls the embodiment two of the oil-water interface detection sensor of series electrical resistive underground oil-water interface detection systems;
Fig. 4 is the cut-open view that a kind of votage control switch provided by the invention controls the embodiment two of the oil-water interface detection sensor of series electrical resistive underground oil-water interface detection systems;
The structured flowchart of the embodiment three of the oil-water interface detection sensor of a kind of votage control switch control series electrical resistive underground oil-water interface detection systems that Fig. 5 provides for the embodiment of the present invention;
Fig. 6 is the outside drawing that a kind of votage control switch provided by the invention controls the embodiment three of the oil-water interface detection sensor of series electrical resistive underground oil-water interface detection systems;
Fig. 7 is the cut-open view that a kind of votage control switch provided by the invention controls the embodiment three of the oil-water interface detection sensor of series electrical resistive underground oil-water interface detection systems;
The structured flowchart of a kind of votage control switch control series electrical resistive underground oil-water interface detection systems that Fig. 8 provides for the embodiment of the present invention;
Fig. 9 is the schematic diagram that a kind of votage control switch provided by the invention controls the specific embodiment of series electrical resistive underground oil-water interface detection systems;
Figure 10 is the concrete structure schematic diagram that a kind of votage control switch provided by the invention controls ground detector in series electrical resistive underground oil-water interface detection systems;
Figure 11 is the circuit theory diagrams that a kind of votage control switch provided by the invention controls the specific embodiment of series electrical resistive underground oil-water interface detection systems;
Figure 12 is the detection schematic diagram that salt hole air reserved storeroom makes chamber process water-oil interface.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention belongs to gas storage cavern and make chamber field of engineering technology, particularly a kind of protective seam Interface detection equipment for controlling salt cave cavity geometry.
Figure 12 is that salt hole air reserved storeroom makes chamber process water-oil interface detection schematic diagram.As shown in Figure 12,1 is ground detector, and 2 is water filling, and 3 is note diesel oil, and 4 manage for making in chamber, and 5 is sleeve pipe, and 6 is diesel oil, and 7 for making chamber outer tube, and 8 is water-oil interface, and 9 is row's bittern, and 10 is detecting sensor, and 11 is open hole section, and 12 is single core sheathed cable.Continuously to salt deposit water filling, dissolve salt deposit by making pipe in chamber, then the bittern of saliferous is expelled to ground continuously by making pipe and the annular space made between the outer tube of chamber in chamber, reach the object making chamber in salt deposit.In order to control to dissolve in salt deposit the cavity geometry that salt deposit is formed, diesel oil need be injected arrive predetermined depth in salt deposit in the annular space making chamber outer tube and the borehole wall.Salt deposit solubilized under this degree of depth, salt deposit more than this degree of depth then can not dissolve, and forms the cavity making reservation shape in the design of chamber thus in salt deposit.In order to diesel oil is injected into predetermined depth position, must makes on the outer tube outer wall of chamber in predetermined depth position and oil-water interface detection sensor is installed, detect injection diesel oil and whether arrive predetermined depth, to adjust in time, ensure that safety makes chamber.
Water-oil interface detection system of the prior art is made up of ground detector 1 and downhole detection sensor 10, is connected by single core sheathed cable.It makes on the outer tube outer wall of chamber, with making chamber outer tube RIH for being arranged on by oil-water interface detection sensor.Oil-water interface detection sensor is connected with ground checkout equipment by cable, can detect injection diesel oil and whether arrive projected depth, to adjust in time, ensures that safety makes chamber.But making the increase along with cavity in the process of chamber, the projected depth of water-oil interface needs constantly to adjust upward, and scope can reach tens of rice.Existing detector for oil-water interface uses a cable only can connect a detecting sensor, cannot meet the requirement of underground oil-water Interface detection depth range.
The structured flowchart of a kind of votage control switch control series electrical resistive underground oil-water interface detection systems that Fig. 8 provides for the embodiment of the present invention, as shown in Figure 8, described votage control switch controls series electrical resistive underground oil-water interface detection systems and comprises:
One ground detector 1;
One oil-water interface detection sensor group 2, is connected with described ground detector 1 by sheathed cable;
Described oil-water interface detection sensor group 2 is made up of the oil-water interface detection sensor 200 described in 5.
In a particular embodiment, described oil-water interface detection sensor group 2 is made up of the oil-water interface detection sensor of 5 series connection.Therefore, underground oil-water interface detection systems of the present invention is the series and parallel compensated resistance formula underground oil-water interface detector that votage control switch controls.Also namely the present invention is made up of ground checkout equipment M, single core sheathed cable L, 5 downhole detection sensors D1, D2, D3, D4, D5.Ground checkout equipment M is connected by single core sheathed cable L with the detecting sensor D being positioned at down-hole.Detecting sensor D1, single core sheathed cable between D2, D3, D4, D5, is used to be connected in series.
A kind of votage control switch provided by the invention controls the structured flowchart of the embodiment one of the oil-water interface detection sensor of series electrical resistive underground oil-water interface detection systems as shown in Figure 1, and as shown in Figure 1, described oil-water interface detection sensor 200 comprises:
Base plate 201;
Be arranged on the testing circuit 202 on described base plate, described testing circuit comprises multiple resistor 203 and multiple diode 204, and each described resistor one end is in parallel, the other end is connected with the negative terminal of the diode described in;
Be embedded in the multiple stainless steel contacts 205 on described base plate, each described stainless steel contact is connected with the anode of diode described in.
The quantity of resistor described in oil-water interface detection sensor provided by the invention is identical with the quantity of the quantity of diode, stainless steel contact respectively.As in the embodiment as shown in fig .4, the quantity of the quantity of resistor, the quantity of diode, stainless steel contact is identical, is 5.Described base plate is made up of resin-based insulating material.
The structured flowchart of the embodiment two of the oil-water interface detection sensor of a kind of votage control switch control series electrical resistive underground oil-water interface detection systems that Fig. 2 provides for the embodiment of the present invention, as shown in Figure 2, in embodiment two, described oil-water interface detection sensor 200 comprises:
Base plate 201;
Be arranged on the testing circuit 202 on described base plate, described testing circuit comprises multiple resistor 203 and multiple diode 204, and each described resistor one end is in parallel, the other end is connected with the negative terminal of the diode described in;
Be embedded in the multiple stainless steel contacts 205 on described base plate, each described stainless steel contact is connected with the anode of diode described in;
Be arranged on a cable seal web member 206 of upper end, for detecting being tightly connected between oil-water interface detection sensor and single core sheathed cable.
Fig. 3 is when the quantity of resistor, the quantity of diode, the quantity of stainless steel contact are 5, the outside drawing of the embodiment two of oil-water interface detection sensor of the present invention, as shown in Figure 3, the base plate 201 be made up of polymer matrix composites of oil-water interface detection sensor provided by the invention and inlay the stainless steel contact 205 being solidificated in its upper surface and form.Oil-water interface detection sensor in this embodiment only has upper end to have cable seal web member 206 to be connected with sheathed cable.Long 1 meter of oil-water interface detection sensor.Stainless steel contact diameter is 10 millimeters.Spacing 200 millimeters between two stainless steel contacts.Every detecting sensor has 5 stainless steel contacts.Detecting sensor D1 only has single-endedly has cable seal web member to be connected with sheathed cable.
Fig. 4 is when the quantity of resistor, the quantity of diode, the quantity of stainless steel contact are 5, the cut-open view of the embodiment two of a kind of oil-water interface detection sensor of the present invention, as shown in Figure 4, described stainless steel contact 205 is wafer type, form by inlaying the contact 2051 that is solidificated on described backplate surface and inlaying the round bar portion 2052 be solidificated in described base plate, the round bar portion of stainless steel contact C, cable connectors base are all inlayed and are solidificated in the base plate of polymer matrix composites; Resistor 203, the diode 204 of testing circuit, be connected wire between capacitor in parallel line 208 with all devices and cover by the polymer matrix composites similar with base plate institute landfill.On circuit, one end of all resistors connects the negative terminal of diode, and the anode of diode connects stainless steel contact.The other end of resistor is all connected with detection resistor coupled in parallel line.Oil-water interface detection sensor in the present embodiment is only single-ended cable connectors.
The structured flowchart of the embodiment three of a kind of oil-water interface detection sensor that Fig. 5 provides for the embodiment of the present invention, as shown in Figure 3, in embodiment three, described oil-water interface detection sensor 200 comprises:
Base plate 201;
Be arranged on the testing circuit 202 on described base plate, described testing circuit comprises multiple resistor 203 and multiple diode 204, and each described resistor one end is in parallel, the other end is connected with the negative terminal of the diode described in;
Be embedded in the multiple stainless steel contacts 205 on described base plate, each described stainless steel contact is connected with the anode of diode described in;
Be arranged on a cable seal web member 206 of upper end, be arranged on a cable seal web member 206 of bottom, for detecting being tightly connected between oil-water interface detection sensor and single core sheathed cable.
Be arranged on the votage control switch 207 between the parallel wire of described resistor and the cable seal web member of described bottom.
Fig. 6 is when the quantity of resistor, the quantity of diode, the quantity of stainless steel contact are 5, the outside drawing of the embodiment two of a kind of oil-water interface detection sensor provided by the invention, as shown in Figure 6, oil-water interface detection sensor provided by the invention is by polymer matrix composites base plate 201 and inlay the stainless steel contact 205 being solidificated in its upper surface and form.All there is cable connectors 206 at oil-water interface detection sensor two ends in the present embodiment.The cable seal web member at detecting sensor two ends is connected with sheathed cable.Long 1 meter of detecting sensor.Stainless steel contact diameter 10 millimeters.Spacing 200 millimeters between two stainless steel contacts.Every detecting sensor has 5 stainless steel contacts.All there is cable seal web member at detecting sensor D2, D3, D4, D5 two ends, are connected with sheathed cable.
Fig. 7 is when the quantity of resistor, the quantity of diode, the quantity of stainless steel contact are 5, the cut-open view of the embodiment two of a kind of oil-water interface detection sensor provided by the invention, as shown in Figure 7, stainless steel contact 205 is wafer type, form by inlaying the contact 2051 that is solidificated on described backplate surface and inlaying the round bar portion 2052 be solidificated in described base plate, the round bar portion of stainless steel contact C, cable connectors 206 base are all inlayed and are solidificated in polymer matrix composites base plate 201; Resistor 203, diode 204, detect resistor coupled in parallel line 208 and between all devices, be connected wire and cover by the polymer matrix composites similar with base plate institute landfill.On circuit, one end of all resistors connects the negative terminal of diode, and the anode of diode connects stainless steel contact.The other end of resistor is all connected with detection resistor coupled in parallel line.All there is cable connectors at oil-water interface detection sensor two ends in the present embodiment.Cable connects packoff and is used for being tightly connected between detecting sensor and single core sheathed cable.The parallel wire detecting resistor H in parallel connection is connected between packoff with the cable of detecting sensor lower end, series connection access 1 12V votage control switch Kv.When detecting sensor D1, D2, D3, D4, D5 be connected in series carry out water-oil interface detect time, protection diode d provides protection for stainless steel contact C.The voltage-controlled Kv switch of 12V is in order to gating detecting sensor.
Detecting sensor of the present invention is by polymer matrix composites base plate and inlay the stainless steel contact being solidificated in its upper surface and form.The two ends up and down of detecting sensor D1, D2, D3, D4, D5 all have cable to connect packoff, and only top is single-ended has cable to connect packoff for detecting sensor D1.
5 detecting sensor D1, D2, D3, D4, D5 manufacture by resin-based insulating material, long 1 meter, and long semi-cylindrical is fixedly mounted on this sensor and detects making outside the outer tube of chamber of the degree of depth.Often prop up the inner detection resistor R being 2k Ω, one end parallel connection by 5 resistances of detecting sensor.All detection resistor R other ends then connect the negative terminal of a protection diode d respectively, and the anode of all protection diode d is then mounted on the bottom of the circular stainless steel contact C being equidistantly 20 centimetres in detecting sensor, each other respectively.The stainless steel contact C of protection diode protection detecting sensor D1, D2, D3, D4, D5 avoids electrolytic reaction corrosion.Stainless steel contact C is disc, diameter 10 millimeters, is embedded in the survey sensor be made up of resin-based insulating material on the surface, directly can contacts with measured medium diesel oil or bittern.The upper and lower two ends of sensor D2, D3, D4, D5,4, top of 5 detecting sensors all have cable to connect packoff, and 1 detecting sensor D1 of bottom is only single-ended has cable to connect packoff.Cable connects packoff and is used for being tightly connected between detecting sensor and single core sheathed cable.At 4, the top of 5 detecting sensors detecting sensor D2, D3, D4, D5 lower inside, be connected between packoff at 5 parallel wires detecting resistor R in parallel with the cable below detecting sensor, series connection access 1 12V votage control switch Kv.Votage control switch Kv disconnects when its both end voltage is less than or equal to 12V, is greater than 12V conducting.
Detecting sensor D thickness is less than 20 millimeters, can smoothly under enter in the annular space of between intervalve and sleeve pipe 20 millimeters.The sealing of resin-based detecting sensor D is withstand voltage is greater than 25MPa.Detecting sensor detects the underground work degree of depth and is greater than 2500 meters.
Fig. 9 is the schematic diagram that a kind of votage control switch provided by the invention controls the specific embodiment of series electrical resistive underground oil-water interface detection systems, and in fig .9, described oil-water interface detection sensor group is made up of the oil-water interface detection sensor of 5 series connection.I.e. 5 underground oil-water Interface detection sensors of the present invention's use, by being connected by single core sheathed cable group, wherein single core armouring is connected in series 5 downhole detection sensors.Ground detector in Fig. 9, uses single core sheathed cable L, connects 5 detecting sensors respectively.5 detecting sensors are respectively D1, D2, D3, D4, D5.
As shown in Figure 9, the system that this embodiment provides is by ground checkout equipment M, and single core sheathed cable L, 5 downhole detection sensors D1, D2, D3, D4, D5 form.Ground checkout equipment M is connected by single core sheathed cable L with the detecting sensor D being positioned at down-hole.Detecting sensor D1, single core sheathed cable between D2, D3, D4, D5, is used to be connected in series.The upper and lower two ends of sensor D2, D3, D4, D5,4, top of 5 detecting sensors all have cable to connect packoff, and 1 detecting sensor D1 of bottom is only single-ended has cable to connect packoff.Cable connects packoff and is used for being tightly connected between detecting sensor and single core sheathed cable L.
Figure 10 is the concrete structure schematic diagram that a kind of votage control switch provided by the invention controls ground detector in series electrical resistive underground oil-water interface detection systems, as shown in Figure 10, described ground detector 1 comprises voltage stabilizing and detects power supply 11, detects the detection reometer 12 that power supply is connected and the detector switch 13 be connected with described detection reometer with described voltage stabilizing.
Figure 11 is the circuit theory diagrams that a kind of votage control switch provided by the invention controls the specific embodiment of series electrical resistive underground oil-water interface detection systems, as shown in Figure 11, in this specific embodiment, described ground detector M detects power supply Vc1, Vc2, Vc3, Vc4, Vc5 by the-12V voltage stabilizing of 5 series connection, detect reometer A, detection voltage-selected switch K1 and test button K switch 2 form.Detecting voltage-selected switch K1 has 5 to select shelves ,-12V measuring voltage Vc1 ,-24V measuring voltage Vc2 in the-12V voltage stabilizing that 5 can be selected respectively to connect detection power supply ,-36V measuring voltage Vc3 ,-48V measuring voltage Vc4 ,-60V voltage Vc5.
The present invention is made up of ground checkout equipment M, single core sheathed cable L, 5 downhole detection sensors D1, D2, D3, D4, D5.Ground checkout equipment M is connected by single core sheathed cable L with the detecting sensor D being positioned at down-hole.Detecting sensor D1, single core sheathed cable between D2, D3, D4, D5, is used to be connected in series.In detecting sensor D2, D3, D4, D5,12V votage control switch Kv is all arranged at bottom, and the connection between bottom detecting sensor and upper detection sensor is all by 12V votage control switch Kv.Ground checkout equipment M detects power supply Vc1-Vc5, detection reometer A, detection voltage-selected switch K1 and test button K switch 2 by the 12V voltage stabilizing of 5 series connection and forms.Detecting voltage-selected switch K1 has 5 to select shelves ,-12V measuring voltage Vc1 ,-24V measuring voltage Vc2 in the-12V voltage stabilizing that 5 can be selected respectively to connect detection power supply ,-36V measuring voltage Vc3 ,-48V measuring voltage Vc4 ,-60V voltage Vc5.The measuring voltage selected after testing button switch K 2 outputs to single core sheathed cable L heart yearn.The detection power supply Vc positive pole of ground checkout equipment is connected to sheathed cable L outer armor (greatly).
5 inner detection resistor R being 2k Ω, one end parallel connection by 5 resistances of detecting sensor.All detection resistor R other ends then connect the negative terminal of a protection diode d respectively, and the anode of all protection diode d is then mounted on the bottom of the circular stainless steel contact C being equidistantly 20 centimetres in detecting sensor, each other respectively.4, the top detecting sensor D2 of 5 detecting sensors, D3, D4, D5 lower inside, be connected between packoff at 5 parallel wires detecting resistor R in parallel with the cable below detecting sensor, series connection access 1 12V votage control switch Kv.Votage control switch Kv disconnects when its both end voltage is less than or equal to 12V, is more than or equal to 12V conducting.
Below in conjunction with Fig. 9, Figure 11, introduce the course of work that votage control switch of the present invention controls series electrical resistive underground oil-water interface detection systems.
Go into the well in process making chamber outer tube, 5 detecting sensor D1, D2, D3, D4, D5 are arranged on according to detection design depth requirements and make outside chamber on tube column accordingly.Downhole detection sensor is installed and is gone into the well in process, according to making chamber engineering design requirements, 5 detecting sensor D1, D2, D3, D4, D5 being arranged on respectively from bottom to top and different making chamber height and position.Single core sheathed cable L heart yearn is connected with detecting sensor D5.Single core sheathed cable is used to be connected between D1, D2, D3, D4, D5.5 detecting sensors are connected in series after installation goes into the well, and 5 detecting sensors are measured medium between stainless steel contact C and open hole section.Measured medium type depends on that diesel oil injects the degree of depth, or is the diesel oil of insulator, or is the bittern of conductor.
In the process that detecting sensor is gone into the well, on use cable fixing clamp/clip to be fixed on by single core sheathed cable L column that every root goes into the well.Due to single core sheathed cable L outer armor with make chamber outer tube and be connected, make chamber outer tube and the earth and be connected and make greatly to become a part for interface detector measure loop passage.
The detection power supply Vc positive pole of ground checkout equipment is connected to sheathed cable L outer armor (greatly),-12V ,-24V ,-36V ,-48V ,-60V five detects power supply and uses detection voltage-selected switch K1 to select one, is switched to single core sheathed cable heart yearn through reometer, button switch K 2.
When carrying out water-oil interface detection, first use and detect voltage-selected switch K1 selection-12V measuring voltage Vc1, Pen-down detection button switch K 2 connects measure loop.Because measuring voltage Vc1 is not more than 12V, the 12V votage control switch Kv of detecting sensor D2, D3, D4, D5 interior lower end is all in off-state, and-12V measuring voltage Vc1 can only detect detecting sensor D5.5 stainless steel contact C on detecting sensor D5 and between open hole section (greatly), measured medium is diesel oil time, to the sensor internal of stainless steel contact C should detecting resistor R no current and pass through, measure current value Ic=0, measure detecting sensor D5 and be in diesel oil.
When between 5 stainless steel contact C and open hole section (greatly) of detecting sensor D5, measured medium is bittern, 5 sensor internals detect resistor R all has electric current to pass through.This measurement current value equals the 0.7V voltage drop Vd that 12V measuring voltage Vc deducts protection diode d, is worth sum divided by cable resistance value Rl is in parallel with the stake resistance Rd of 5 detection resistor R and stainless steel contact C.Cable length of going into the well is given value, can calculate cable resistance value Rl from every meter, cable length resistance value.Stainless steel contact is semisphere, radius 5 millimeters, stake resistance Rd=ρ/2 π α (ρ: bittern resistivity, α: the radius of semisphere stainless steel contact).The radius α of bittern electricalresistivityρ and semisphere stainless steel contact is definite value, so stainless steel contact ground resistance Rd is also definite value.Measurement current value when detecting sensor D5 is in bittern is Ic=5 (Vc-Vd)/(Rl+R+Rd).
When the upper part stainless steel contact C of 5 stainless steel contact C of detecting sensor D5 is in diesel oil, when low portion stainless steel contact C is in bittern, upper part stainless steel contact C passes through without detection electric current, and low portion stainless steel contact C has detection electric current to pass through.Detect electric current I c=n (Vc-Vd)/(Rl+R+Rd), n is the quantity of detecting sensor D5 low portion stainless steel contact C in bittern.Because Vc, Vd, Rl, R, Rd, Ic are given value.The quantity n of stainless steel contact, detecting sensor D5 bottom C in bittern can be calculated thus.Measuring voltage Vc=Vc1=-12V.Because detecting sensor D5 fitting depth position is determined, the fitting depth position of each stainless steel contact C is also determined.Calculate the quantity n of stainless steel contact C in bittern, also just determine the position of water-oil interface.N is 0,1,2,3,4,5.
Use and detect voltage-selected switch K1 and select-12V measuring voltage Vc1, as measurement current value Ic=0, measure detecting sensor D5 when being in diesel oil, use and detect voltage-selected switch K1 and select-24V measuring voltage Vc2 to measure.12V votage control switch Kv now in detecting sensor D5 connects, and the 12V votage control switch Kv in D2, D3, D4 is still in off-state, and-24V measuring voltage Vc2 can only water-oil interface on detecting sensor D4.Because the 12V votage control switch Kv in detecting sensor D5 has 12V voltage drop, the measuring voltage on detecting sensor D4 is also Vc=Vc2-Vc1=-12V.Detecting sensor D4 measuring process is identical with detecting sensor D5 measuring process.
When detecting sensor D4 measures current value Ic=0, measure detecting sensor D4 when being in diesel oil, use and detect voltage-selected switch K1 and select-36V measuring voltage Vc3 to measure.12V votage control switch Kv now in detecting sensor D4, D5 connects, and the 12V votage control switch Kv in D2, D3 is still in off-state, and-36V measuring voltage Vc3 can only water-oil interface on detecting sensor D3.Because the 12V votage control switch Kv in detecting sensor D4, D5 all has 12V voltage drop, the measuring voltage on detecting sensor D3 is also Vc=Vc3-Vc2=-12V.Detecting sensor D3 measuring process and detecting sensor D4, D5 measuring process are identical.
When detecting sensor D3 measures current value Ic=0, measure detecting sensor D3 when being in diesel oil, use and detect voltage-selected switch K1 and select-48V measuring voltage Vc4 to measure.12V votage control switch Kv now in detecting sensor D3, D4, D5 connects, and the 12V votage control switch Kv in D2 is still in off-state, and-48 measuring voltage Vc3 can only water-oil interface on detecting sensor D2.Because the 12V votage control switch Kv in detecting sensor D3, D4, D5 all has 12V voltage drop, the measuring voltage on detecting sensor D2 is also Vc=Vc4-Vc3=-12V.Detecting sensor D2 measuring process and detecting sensor D3, D4, D5 measuring process are identical.
When detecting sensor D2 measures current value Ic=0, measure detecting sensor D2 when being in diesel oil, use and detect voltage-selected switch K1 and select-60V measuring voltage Vc5 to measure.12V votage control switch Kv now in detecting sensor D2, D3, D4, D5 all connects, and-60V measuring voltage Vc3 can only water-oil interface on detecting sensor D1.Because the 12V votage control switch Kv in detecting sensor D2, D3, D4, D5 all has 12V voltage drop, the measuring voltage on detecting sensor D1 is also Vc=Vc5-Vc4=-12V.Detecting sensor D1 measuring process and detecting sensor D2, D3, D4, D5 measuring process are identical.
Till above-mentioned testing process proceeds to measure water-oil interface.
Detecting sensor D1, D2, D, D4, D5 and single core sheathed cable L go into the well after installation, are connected by single core sheathed cable L on ground with the ground checkout equipment M of detector for oil-water interface.After salt hole air reserved storeroom makes chamber commencement of works, make chamber outer tube and between sleeve pipe and the bore hole borehole wall, the sixth of the twelve Earthly Branches injects diesel oil.When needs detect water-oil interface, first use and detect voltage-selected switch K1 selection-12V measuring voltage Vc1, water-oil interface detection is carried out to detecting sensor D5.When D5 is in diesel oil, uses and detect voltage-selected switch K1 selection-24V measuring voltage Vc2, connect the 12V votage control switch Kv in detecting sensor D5, water-oil interface detection is carried out to detecting sensor D4.When D4 is in diesel oil, uses and detect voltage-selected switch K1 selection-36V measuring voltage Vc3, connect the 12V votage control switch Kv in detecting sensor D5, D4, water-oil interface detection is carried out to detecting sensor D3.When D3 is in diesel oil, uses and detect voltage-selected switch K1 selection-48V measuring voltage Vc4, connect the 12V votage control switch Kv in detecting sensor D5, D4, D3, water-oil interface detection is carried out to detecting sensor D2.When D2 is in diesel oil, uses and detect voltage-selected switch K1 selection-60V measuring voltage Vc5, connect the 12V votage control switch Kv in detecting sensor D5, D4, D3, D2, water-oil interface detection is carried out to detecting sensor D1.Till above-mentioned testing process proceeds to measure water-oil interface.
In testing process, be in the upper part stainless steel contact C of 5 stainless steel contact C on the detecting sensor D at water-oil interface place in 5 detecting sensor D in diesel oil, low portion stainless steel contact C is in bittern.Upper part stainless steel contact C passes through without detection electric current, and low portion stainless steel contact C has detection electric current to pass through.Detect electric current I c=n (Vc-Vd)/(Rl+R+Rd), n is the quantity of detecting sensor D low portion stainless steel contact C in bittern.Because Vc, Vd, Rl, R, Rd, Ic are given value.The quantity n of stainless steel contact, bottom C in bittern of detecting sensor D can be calculated thus.Because detecting sensor D5 fitting depth position is determined, the fitting depth position of each stainless steel contact C is also determined.Calculate the quantity n of stainless steel contact C in bittern, also just determine the position of water-oil interface.N is 0,1,2,3,4,5.
In sum, the invention provides a kind of votage control switch and control series electrical resistive underground oil-water interface detection systems, by arranging testing circuit and stainless steel contact on base plate, achieve and normally can complete testing for a long time in the hot environment of 100 DEG C and the hyperbaric environment of 30Mpa, the construction adapting to China's salt hole air reserved storeroom has started to develop to deep-well, to the oil-water interface detection sensor of the more high performance requirements use that the checkout equipment of water-oil interface proposes, the votage control switch that is made up of multiple oil-water interface detection sensor and ground detector controls series electrical resistive underground oil-water interface detection systems can water-oil interface under measuring well, realize the continuous coverage at underground oil-water interface, improve underground oil-water Interface detection depth range and measuring accuracy, reduce to make on the outer tube of chamber and carry number of times, reduce and make chamber cost, meet reacting cycle make chamber new make the measurement requirement of chamber engineering to underground oil-water interface.When the present invention uses 5 detecting sensors to carry out water-oil interface detection, 5 detecting sensors are arranged on each predetermined detection depth location respectively, then are connected in series by a single core sheathed cable detecting sensor.
Beneficial effect of the present invention is:
The present invention uses single core sheathed cable L can apply 5 detecting sensor D to carry out underground oil-water Interface detection.The needs that 5 detecting sensor D can detect depth range and accuracy of detection according to water-oil interface are configured installation, compare single-sensor oil-water interface detecting device, improve water-oil interface and detect depth range and accuracy of detection.
Detecting sensor D of the present invention uses and detects resistor R as main circuit device, there are 3 effects: not to responsive to temperature electron device in (1) sensor D, reduce the impact of down-hole high temperature on sensor internal circuit, improve the underground work life-span of sensor D and install and measure well depth.(2) circuit devcie quantity is reduced to corresponding each stainless steel contact C only has a detection resistor R and to protect diode d, and sensor internal circuit devcie quantity is few, reduces the failure rate of sensor D.(3) sensor internal circuit devcie quantity is few, is conducive to improving the sealing reliability in sensor processing and manufacturing process.
The most withstand voltage 30MPa of high sealing of detecting sensor D of the present invention, maximum operating temperature 100 DEG C, maximum oil water termination detects the degree of depth 3000 meters, and the gas storage cavern that can meet China's deep-well is made water-oil interface in the engineering of chamber and detected the requirement of above-mentioned 3 parameters.
The negative terminal that 12V voltage stabilizing that ground detection instrument M of the present invention adopts 5 to connect detects power supply Vc1, Vc2, Vc3, Vc4, Vc5 in testing process by detection voltage-selected switch K1 gating 1 order core sheathed cable L heart yearn, in order to the downhole detection sensor that gating is to be measured.The positive termination the earth of Vc, in conjunction with the polarity protection diode d in detecting sensor D1, D2, D3, D4, D5, can not corroded by electrolytic reaction by the stainless steel contact C on available protecting detecting sensor D.
In ground detection instrument M testing process of the present invention, use the 12V votage control switch Kv that detecting sensor D2, D3, D4, D5 are built-in, 12V voltage stabilizing detection power supply Vc1, Vc2, Vc3, Vc4, the Vc5 that 5 can be used to connect independently detect the water-oil interface in 1 detecting sensor from top to bottom, the impact of other detecting sensor cable connectors of effective eliminating and stube cable electric leakage, ensure that the normal measurement of water-oil interface, improve the measuring accuracy of water-oil interface.
In the difference testing process of detecting sensor D1, D2, D3, D4, D5, every detecting sensor actual measurement voltage Vc=-12V.By measuring current value Ic, according to known parameters, application n=Ic/ [(Vc-Vd)/(Rl+R+Rd)] measure equation calculates n value, and can calculate the depth location of water-oil interface in this detecting sensor, error is less than 20 centimetres.Because detecting sensor D1, D2, D3, D4, D5 fitting depth position are determined, in every detecting sensor, the fitting depth position of each stainless steel contact C is also determined.Calculate the quantity n of stainless steel contact C in bittern, also just determine the position of water-oil interface, error is less than 20 centimetres.N is 0,1,2,3,4,5.
The present invention's " votage control switch controls series electrical resistive detector for oil-water interface " adopts resistor as testing circuit device main in downhole detection sensor.Because the main detecting element in detecting sensor is resistor, it is electronic parts, there is the operating voltage that comparable electron device is much higher, for using 1 single core sheathed cable series winding connection, more than 5 or 5 detecting sensors, water-oil interface under measuring well in a series arrangement, expand underground oil-water Interface detection depth range, reduce to make on the outer tube of chamber and carry number of times, reduce and make chamber cost, meet the needs of underground rock salt gas storage solution mining engineering, create necessary condition.
Gordian technique of the present invention is to utilize stube cable between downhole sensor cable connectors and downhole sensor to be in bittern slight electric leakage and the feature that can disappear of slightly leaking electricity in the diesel oil being in insulator, each installation 1 voltage cut-out in the sensor of 4, top in 5 detecting sensor detection systems, be called for short votage control switch, detector for oil-water interface can be realized to the gating measurement from top to bottom of 5, down-hole detecting sensor, effectively prevent the impact that stube cable between downhole detection sensor and detecting sensor detect water-oil interface with the web member tracking of cable, what realize salt hole air reserved storeroom makes the normal detection that chamber engineering makes the underground oil-water interface of chamber overall process for 5 to 6 years.
Detecting sensor of the present invention uses resistor as main Detection theory device, because resistor has higher serviceability temperature compared with electron device, detecting sensor of the present invention normally can work in the environment of more than 100 DEG C, down-hole, normally can measure water-oil interface by well depth more than 3000 meters, fully can meet the needs that in China's deep-well salt hole air reserved storeroom construction, water-oil interface detect.
Ground checkout equipment M detects power supply Vc1, Vc2, Vc3, Vc4, Vc5 by the-12V voltage stabilizing of 5 series connection, detects reometer A, and detection voltage-selected switch K1 and test button K switch 2 form.Detecting voltage-selected switch K1 has 5 to select shelves ,-12V measuring voltage Vc1 ,-24V measuring voltage Vc2 in the-12V voltage stabilizing that 5 can be selected respectively to connect detection power supply ,-36V measuring voltage Vc3 ,-48V measuring voltage Vc4 ,-60V voltage Vc5.
At 4, the top of 5 detecting sensors detecting sensor D2, D3, D4, D5 lower inside, be connected between packoff at 5 parallel wires detecting resistor R in parallel with the cable below detecting sensor, series connection access 1 12V votage control switch Kv.Votage control switch Kv disconnects when its both end voltage is less than or equal to 12V, is greater than 12V conducting.For gating detecting sensor D1, D2, D3, D4 under the output voltage control of ground checkout equipment M.Detecting sensor D thickness is less than 20 millimeters, can smoothly under enter in the annular space of between intervalve and sleeve pipe 20 millimeters.The sealing of resin-based detecting sensor D is withstand voltage is greater than 25MPa.Detecting sensor detects the underground work degree of depth and is greater than 3000 meters.
Downhole detection sensor is installed and is gone into the well in process, according to making chamber engineering design requirements, 5 detecting sensor D1, D2, D3, D4, D5 being arranged on respectively from bottom to top and different making chamber height and position.5 detecting sensors are connected in series after installation goes into the well, and 5 detecting sensors are measured medium between stainless steel contact C and open hole section.Measured medium type depends on that diesel oil injects the degree of depth, or is the diesel oil of insulator, or is the bittern of conductor.
The detection power supply Vc positive pole of ground checkout equipment is connected to sheathed cable L outer armor (greatly),-12V ,-24V ,-36V ,-48V ,-60V detect power supply use detect voltage-selected switch K1 select its 1, be switched to single core sheathed cable L heart yearn through reometer, button switch K 2, jointly form underground oil-water Interface detection loop with the earth.
Detecting sensor D1, D2, D, D4, D5 and single core sheathed cable L go into the well after installation, are connected by single core sheathed cable L on ground with the ground checkout equipment M of detector for oil-water interface.After salt hole air reserved storeroom makes chamber commencement of works, make chamber outer tube and inject diesel oil between sleeve pipe and the bore hole borehole wall.When needs detect water-oil interface, first use and detect voltage-selected switch K1 selection-12V measuring voltage Vc1, water-oil interface detection is carried out to detecting sensor D5.When D5 is in diesel oil, uses and detect voltage-selected switch K1 selection-24V measuring voltage Vc2, connect the 12V votage control switch Kv in detecting sensor D5, water-oil interface detection is carried out to detecting sensor D4.When D4 is in diesel oil, uses and detect voltage-selected switch K1 selection-36V measuring voltage Vc3, connect the 12V votage control switch Kv in detecting sensor D5, D4, water-oil interface detection is carried out to detecting sensor D3.When D3 is in diesel oil, uses and detect voltage-selected switch K1 selection-48V measuring voltage Vc4, connect the 12V votage control switch Kv in detecting sensor D5, D4, D3, water-oil interface detection is carried out to detecting sensor D2.When D2 is in diesel oil, uses and detect voltage-selected switch K1 selection-60V measuring voltage Vc5, connect the 12V votage control switch Kv in detecting sensor D5, D4, D3, D2, water-oil interface detection is carried out to detecting sensor D1.Till above-mentioned testing process proceeds to measure water-oil interface.
In testing process, be in the upper part stainless steel contact C of 5 stainless steel contact C on the detecting sensor D at water-oil interface place in 5 detecting sensor D in diesel oil, low portion stainless steel contact C is in bittern.Upper part stainless steel contact C passes through without detection electric current, and low portion stainless steel contact C has detection electric current to pass through.Detect electric current I c=n (Vc-Vd)/(Rl+R+Rd), n is the quantity of detecting sensor D low portion stainless steel contact C in bittern.Because Vc, Vd, Rl, R, Rd, Ic are given value.The quantity n of stainless steel contact, bottom C in bittern of detecting sensor D can be calculated thus.Because detecting sensor D5 fitting depth position is determined, the fitting depth position of each stainless steel contact C is also determined.Calculate the quantity n of stainless steel contact C in bittern, also just determine the position of water-oil interface.N is 0,1,2,3,4,5.
The invention is characterized in that this water-oil interface detection system is made up of above-mentioned ground checkout equipment M, single core sheathed cable L, 5 downhole detection sensors D1, D2, D3, D4, D5.
5 detecting sensor D1, D2, D3, D4, D5 manufacture by resin-based insulating material, long 1 meter, and long semi-cylindrical is fixedly mounted on this sensor and detects making outside the outer tube of chamber of the degree of depth.Often prop up the inner detection resistor R being 2k Ω, one end parallel connection by 5 resistances of detecting sensor.All detection resistor R other ends then connect the negative terminal of a protection diode d respectively, and the anode of all protection diode d is then mounted on the bottom of the circular stainless steel contact C being equidistantly 20 centimetres in detecting sensor, each other respectively.The stainless steel contact C of protection diode protection detecting sensor D1, D2, D3, D4, D5 avoids electrolytic reaction corrosion.Stainless steel contact C is disc, diameter 10 millimeters, is embedded in the survey sensor be made up of resin-based insulating material on the surface, directly can contacts with measured medium diesel oil or bittern.The upper and lower two ends of sensor D2, D3, D4, D5,4, top of 5 detecting sensors all have cable to connect packoff, and 1 detecting sensor D1 of bottom is only single-ended has cable to connect packoff.Cable connects packoff and is used for being tightly connected between detecting sensor and single core sheathed cable L.
4, the top detecting sensor D2 of 5 detecting sensors, D3, D4, D5 lower inside, be connected between packoff at 5 parallel wires detecting resistor R in parallel with the cable below detecting sensor, series connection access 1 12V votage control switch Kv.Votage control switch Kv disconnects when its both end voltage is less than or equal to 12V, is greater than 12V conducting.For 1 in gating detecting sensor D1, D2, D3, D4, D5 from top to bottom under the output voltage control of ground checkout equipment M, every detecting sensor is measured separately, until detect the depth location of water-oil interface.This metering system effectively can get rid of the impact of stube cable electric leakage between cable connectors in the detecting sensor below tested detecting sensor and sensor, meets more than 6 years salt hole air reserved storerooms and makes in the process of chamber the requirement that water-oil interface whole process detects.
5 detecting sensor D thickness are less than 20 millimeters, can smoothly under enter in the annular space of between intervalve and sleeve pipe 20 millimeters.The sealing of resin-based detecting sensor D is withstand voltage is greater than 25MPa.Detecting sensor detects the underground work degree of depth and is greater than 3000 meters.
Ground checkout equipment M detects power supply Vc1, Vc2, Vc3, Vc4, Vc by the 12V voltage stabilizings of 5 series connection, detect reometer A, detect voltage-selected switch K1 and test button K switch 2 forms.Detecting voltage-selected switch K1 has 5 to select shelves,-12V measuring voltage Vc1 ,-24V measuring voltage Vc2 in the 12V voltage stabilizing detection power supply that 5 can be selected respectively to connect ,-36V measuring voltage Vc3 ,-48V measuring voltage Vc4 ,-60V voltage Vc5, for difference gating downhole detection sensor D1, D2, D3, D4, D5.
In testing process, be in the upper part stainless steel contact C of 5 stainless steel contact C on the detecting sensor D at water-oil interface place in 5 detecting sensor D in diesel oil, low portion stainless steel contact C is in bittern.Upper part stainless steel contact C passes through without detection electric current, and low portion stainless steel contact C has detection electric current to pass through.Detect electric current I c=n (Vc-Vd)/(Rl+R+Rd), n is the quantity of detecting sensor D low portion stainless steel contact C in bittern.Because Vc, Vd, Rl, R, Rd, Ic are given value.The quantity n of stainless steel contact, bottom C in bittern of detecting sensor D can be calculated thus.Because detecting sensor D5 fitting depth position is determined, the fitting depth position of each stainless steel contact C is also determined.Calculate the quantity n of stainless steel contact C in bittern, also just determine the position of water-oil interface.
Those skilled in the art can also recognize that the various functions that the embodiment of the present invention is listed are the designing requirements realizing depending on specific application and whole system by hardware or software.Those skilled in the art for often kind of specifically application, can use the function described in the realization of various method, but this realization can should not be understood to the scope exceeding embodiment of the present invention protection.
Apply specific embodiment in the present invention to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (13)
1. votage control switch controls a series electrical resistive underground oil-water interface detection systems, it is characterized in that, described votage control switch controls series electrical resistive underground oil-water interface detection systems and comprises:
One ground detector;
One oil-water interface detection sensor group, is connected with described ground detector by sheathed cable;
Described oil-water interface detection sensor group is made up of 5 oil-water interface detection sensors.
2. votage control switch according to claim 1 controls series electrical resistive underground oil-water interface detection systems, and it is characterized in that, 5 described oil-water interface detection sensors are connected mutually.
3. votage control switch according to claim 1 and 2 controls series electrical resistive underground oil-water interface detection systems, and it is characterized in that, described oil-water interface detection sensor comprises:
Base plate;
Be arranged on the testing circuit on described base plate, described testing circuit comprises multiple resistor and multiple diode, and each described resistor one end is in parallel, the other end is connected with the negative terminal of diode described in;
Be embedded in the multiple stainless steel contacts on described base plate, each described stainless steel contact is connected with the anode of diode described in.
4. votage control switch according to claim 3 controls series electrical resistive underground oil-water interface detection systems, and it is characterized in that, the quantity of described resistor is identical with the quantity of the quantity of described diode, described stainless steel contact.
5. votage control switch according to claim 4 controls series electrical resistive underground oil-water interface detection systems, and it is characterized in that, the quantity of described resistor is 5.
6. votage control switch according to claim 5 controls series electrical resistive underground oil-water interface detection systems, and it is characterized in that, described oil-water interface detection sensor also comprises the cable seal web member being arranged on upper end.
7. votage control switch according to claim 5 controls series electrical resistive underground oil-water interface detection systems, it is characterized in that, described oil-water interface detection sensor also comprises the cable seal web member being arranged on upper end, the cable seal web member being arranged on bottom.
8. votage control switch according to claim 7 controls series electrical resistive underground oil-water interface detection systems, it is characterized in that, described oil-water interface detection sensor also comprises the votage control switch between parallel wire and the cable seal web member of described bottom being arranged on described resistor.
9. votage control switch according to claim 3 controls series electrical resistive underground oil-water interface detection systems, and it is characterized in that, described base plate is made up of resin-based insulating material.
10. votage control switch according to claim 3 controls series electrical resistive underground oil-water interface detection systems, it is characterized in that, described stainless steel contact is wafer type, forms by inlaying the contact that is solidificated on described backplate surface and inlaying the round bar portion be solidificated in described base plate.
11. votage control switches according to claim 8 control series electrical resistive underground oil-water interface detection systems, it is characterized in that, the thickness of described oil-water interface detection sensor is less than 20 millimeters, most high sealing is withstand voltage is 30Mpa, it is 3000 meters that maximum oil water termination detects the degree of depth, and maximum operating temperature is 100 DEG C.
12. votage control switches according to claim 3 control series electrical resistive underground oil-water interface detection systems, and it is characterized in that, described sheathed cable is single core sheathed cable.
13. votage control switches according to claim 1 or 8 control series electrical resistive underground oil-water interface detection systems, it is characterized in that, described ground detector comprises voltage stabilizing and detects power supply, detects the detection reometer that power supply is connected and the detector switch be connected with described detection reometer with described voltage stabilizing.
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| CN106092256A (en) * | 2015-05-01 | 2016-11-09 | 中国石油天然气集团公司 | Underground oil-water interface detector |
| CN106092256B (en) * | 2015-05-01 | 2020-03-10 | 中国石油天然气集团公司 | Underground oil-water interface detector |
| CN107796481A (en) * | 2017-09-22 | 2018-03-13 | 湖北宏远仪表制造股份有限公司 | A kind of magnetic level transmitter |
| CN107796481B (en) * | 2017-09-22 | 2020-01-07 | 湖北宏远仪表制造股份有限公司 | Magnetic liquid level transmitter |
| CN107764372A (en) * | 2017-10-23 | 2018-03-06 | 徐州徐工挖掘机械有限公司 | A kind of tandem type fuel level sensor of changeable fluid |
| CN113358188A (en) * | 2021-04-28 | 2021-09-07 | 华中科技大学 | Salt cavern gas storage gas-liquid interface measuring method and system based on low-frequency electric signals |
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Application publication date: 20150408 |