CN103195408A - Measuring method for flow imaging of oil well - Google Patents
Measuring method for flow imaging of oil well Download PDFInfo
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- CN103195408A CN103195408A CN2013101245779A CN201310124577A CN103195408A CN 103195408 A CN103195408 A CN 103195408A CN 2013101245779 A CN2013101245779 A CN 2013101245779A CN 201310124577 A CN201310124577 A CN 201310124577A CN 103195408 A CN103195408 A CN 103195408A
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Abstract
The invention discloses a measuring method for flow imaging of an oil well. The measuring method includes axially arranging a plurality of measuring electrode retaining collars and shielding electrode retaining collars on an oil well wall of to-be-measured fluid; sequentially selecting one electrode in each measuring electrode retaining collar to serve as an exciting electrode, and exciting the exciting electrode and electrodes adjacent to the periphery of the exciting electrode to generate a fascicular electromagnetic field; sequentially selecting one electrode, two electrodes away from the exciting electrode, in each measuring electrode retaining collar to serve as a receiving electrode to receive response signals of fluid media; and processing the response signals received by each electrode of each measuring electrode retaining collar to generate flowing parameters and images of the cross section of the to-be-measured fluid. The measuring method is applicable to various situations of high and low water containing; scanning and measuring can be performed on the flowing cross section of multi-phase fluid repeatedly, so that soft field effects of common electric measurement can be overcome, the fluid media can be identified with high resolution, and interference on original flow of the multi-fluid fluid in the well is small; and the measuring method has the advantages of strong real-time performance, zero damage, low cost, simplicity in using and the like.
Description
Technical field
Patent of the present invention belongs to the applied geophysics logging technique, relates to the method for electromagnetically measuring that a kind of oil gas well production dynamic monitoring and multiphase pipe flow imaging detect, and is the moving imaging measurement method of a kind of oil gas well stream concretely.
Background technology
Oil and natural gas is contained in underground thousands of meters dark oil-gas Layer, gets through the stratum by drilling well and exploits.Production of hydrocarbons well section operated by rotary motion has iron and steel matter sleeve pipe or the screen casing of round shape, and angle is vertical with ground line, inclination or level.Because the moisture or waterflooding extraction in stratum, two-phase or the Three-phase Flow of oil, G﹠W often in the pit shaft.Utilize the heterogeneous flow profile of logger monitoring producing well section, can understand the production status of oil-gas Layer, take scientific and reasonable technical measures, guarantee oil gas stable yields and high yield.
The interior heterogeneous fluid of production of hydrocarbons well distributes very complicated, and analysis of flow characteristics needs the details at each position on the flow section, should research and solve by the nonlinear kinetics measurement.Existing flow profile logging technique belongs to linear measurement, collection be the total result of medium in the investigative range, the accurate information that can't provide fluid to distribute presses for new measuring method and technology.The oil gas well stream of this invention moves the imaging method for electromagnetically measuring, and information that can nonlinear scanning mode production wells flow field is handled the real-time reconstruction flow image by data, accurately reflects flow pattern and the feature of heterogeneous fluid in the oil gas well.
Summary of the invention
The embodiment of the invention provides a kind of oil gas well stream to move the imaging measurement method, comprising:
With a plurality of measurement electrode rings and bucking electrode annulate shaft to the oil well wall that is arranged at intervals at detected fluid;
Select in each measurement electrode ring an electrode as exciting electrode in regular turn, excite described exciting electrode and with exciting electrode adjacent electrode up and down, generate the pencil electromagnetic field;
Select in regular turn in each measurement electrode ring with described exciting electrode at interval plural electrode receive the response signal of described fluid media (medium) as collecting electrode;
Handle flow parameter and the image that the back generates the detected fluid cross section according to the response signal that each electrode in each measurement electrode ring receives.
Preferably, the electrode that all has N equidistant annular arrangement of measurement electrode ring and bucking electrode ring in the embodiment of the invention, wherein, and N〉6.
Preferably, each electrode in the embodiment of the invention in the measurement electrode ring is identical, and each electrode in the described bucking electrode ring is identical.
Preferably, in the embodiment of the invention with exciting electrode up and down adjacent electrode comprise: the electrode adjacent with exciting electrode in the electrode adjacent with exciting electrode and the adjacent bucking electrode ring in the measurement electrode ring at described exciting electrode place.
Excite in the embodiment of the invention described exciting electrode and with exciting electrode adjacent electrode up and down, generate the pencil electromagnetic field and comprise:
Supply with fixed, the frequency certain range of excitation signal of electrode one electric current weighing apparatus adjacent with exciting electrode in electrode adjacent with exciting electrode in described exciting electrode, the described measurement electrode ring and the adjacent bucking electrode ring, generate the pencil electromagnetic field in detected fluid, the cps of pumping signal is nMHz.
Preferably, select in regular turn in the embodiment of the invention in each measurement electrode ring that plural electrode is as collecting electrode at interval with described exciting electrode, the response signal that receives described fluid media (medium) comprises:
With described collecting electrode adjacent four electrode groundings up and down, be about in the measurement electrode ring and the electrode grounding adjacent with described collecting electrode in the bucking electrode ring.
The present invention fully utilizes dielectric property and the conductive characteristic difference identification borehole fluid of oil, gas and water, be applicable to high and low moisture various situations, and by in well, exciting the electromagnetic field of fascicular texture, to heterogeneous fluid flow section scanning survey repeatedly, can effectively overcome generally electrometric " soft " effect, high-resolution identification fluid media (medium), the electromagnetic array sensor is close to the borehole wall in the method for the present invention, need not invade fluid inside, very little to the mobile interference of the script of heterogeneous fluid in the well.In addition, method of the present invention belongs to functional imaging, have real-time, non-invasi, with low cost, use advantages such as convenient.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the moving imaging measurement method of oil gas well stream of the present invention;
The multilayer ring electrode array structure vertical section schematic diagram that Fig. 2 adopts for the present invention
Fig. 3 vertically shields schematic diagram for surveying electromagnetic field;
Fig. 4 is for surveying electromagnetic field transverse focusing schematic diagram;
The multilayer ring electrode array probe metering system schematic diagram that Fig. 5 adopts for the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The invention provides the moving imaging measurement method of a kind of oil gas well stream, as shown in Figure 1, this method comprises:
Step S101, with a plurality of measurement electrode rings and bucking electrode annulate shaft to the oil well wall that is arranged at intervals at detected fluid;
Step S102 selects in each measurement electrode ring an electrode as exciting electrode in regular turn, excite exciting electrode and with exciting electrode adjacent electrode up and down, generate the pencil electromagnetic field;
Step S103, select in regular turn in each measurement electrode ring with exciting electrode at interval plural electrode receive the response signal of fluid media (medium) as collecting electrode;
Step S104 handles flow parameter and the image that the back generates the detected fluid cross section according to the response signal that each electrode in each measurement electrode ring receives.
Preferably, the electrode that all has N equidistant annular arrangement of measurement electrode ring and bucking electrode ring is preferred in the embodiment of the invention, N among the present invention〉6.
Among the present invention with exciting electrode up and down adjacent electrode comprise: the electrode adjacent with exciting electrode in the electrode adjacent with exciting electrode in the measurement electrode ring at exciting electrode place, the adjacent bucking electrode ring.
Excite in the embodiment of the invention described exciting electrode and with exciting electrode adjacent electrode up and down, generate the pencil electromagnetic field and comprise:
Electrode one electric current weighing apparatus fixed, the frequency certain range of excitation signal adjacent with exciting electrode in the electrode adjacent with exciting electrode and the adjacent bucking electrode ring in supply incentive electrode, the measurement electrode ring, generate the pencil electromagnetic field in detected fluid, the cps of pumping signal is nMHz.
Select in regular turn in the embodiment of the invention in each measurement electrode ring with described exciting electrode at interval plural electrode as collecting electrode, the response signal that receives described fluid media (medium) comprises: with collecting electrode adjacent four electrode groundings up and down, be about in the measurement electrode ring and the electrode grounding adjacent with collecting electrode in the bucking electrode ring.
Below in conjunction with concrete embodiment technical solution of the present invention is described in further details.
The object of the invention is to provide a kind of pencil that excites in the oil gas well to survey electromagnetic field, the method for scanning survey heterogeneous fluid flow section image.
The present invention realizes in the following way:
Constitute multilayer ring electrode array by bucking electrode ring and measurement electrode ring, as shown in Figure 2, bucking electrode ring 201 and measurement electrode ring 202 rearrange between on the axial Z mutually, measurement electrode ring 201 is identical with the electrode number of bucking electrode ring 202, identical electrodes by N equidistant annular arrangement is formed, N in each electrode retaining collar in the embodiment of the invention〉6, electrode number can influence Measurement Resolution very little, and electrode number too much may influence the real-time of measuring imaging.
In the oil gas well during excitation electromagnetic field, electrod-array is close to the oil well wall places detected fluid, select any electrode and its 4 adjacent electrodes up and down in the measurement electrode ring, supply electric current weighing apparatus is fixed, the pumping signal of frequency certain (unit is nMHz), forms the electromagnetic field of fascicular texture in borehole fluid.As shown in Figure 3, it is the vertical view of a measurement electrode ring, wherein electrode 1 is as exciting electrode, give in electrode 1, this measurement electrode ring electrode 16 and electrode 2 one electric currents weighing apparatus fixed, the frequency certain range of excitation signal adjacent with electrode 1, also give in the bucking electrode ring electrode one pumping signal adjacent with electrode 1 simultaneously, do not indicate among this figure, form the fascicular texture electromagnetic field.As the vertical shielding schematic diagram of Fig. 4 for the detection electromagnetic field of formation, each electrode in the measurement electrode ring 401 is as exciting electrode, 402 and 403 is the bucking electrode ring adjacent with electrode retaining collar 401, at this moment, electrode 16 and electrode 2 be because the electric current identical with electrode 1 emission, thereby suppress to survey the diffusion of electromagnetic field diametrically.Fig. 5 is the transverse focusing schematic diagram of the detection electromagnetic field that forms, and electrode 501,502,503 is exciting electrode, and electrode 505 is during as collecting electrode, electrode 504 and 506 ground connection.
When in the oil gas well, receiving useful signal, select in the measurement electrode ring and the exciting electrode electrode more than 2 at interval, with its 4 adjacent electrode groundings up and down, also with reference to figure 3, when selecting electrode 9 to receive useful signal as collecting electrode, with electrode grounding adjacent with electrode 9 in the electrode 10 in this measurement electrode ring, electrode 8 and the adjacent bucking electrode ring, the response signal that electrode 9 receives under the fluid media (medium) effects.The exciting signal frequency that the present invention adopts is nMHz, not only can reflect conduction property and the dielectric property of borehole fluid simultaneously, and the frequency dispersion influence that can effectively avoid a variety of causes to cause.
During the scanning survey data, select an electrode of measurement electrode ring to excite successively, other N-5 electrode circulation receives, each electrode in this measurement electrode ring is excited and circulates reception through N time, for the fluid flow section of this electrode retaining collar place degree of depth, can gather the individual independent measurement data of N * (N-5).These survey data have reflected the electrical parameter of different parts medium on the tested flow section at this electrode retaining collar place respectively, can rebuild this flow section image and determine each phase fluid proportional speed by handling.Equally, other measurement electrode ring in the detected fluid is also carried out aforesaid operations, obtain image and each phase fluid ratio in each cross section, electrode retaining collar place.To heterogeneous fluid flow section scanning survey repeatedly, can effectively overcome generally electrometric " soft " effect, high-resolution identification fluid media (medium)
The invention provides a kind of in the oil gas well heterogeneous fluid flow imaging measuring method, this method comprises that electromagnetic field excitation is surveyed in the Array Construction of multilayer ring electrode, pencil, useful signal is accepted and data scanning is measured.The moving imaging method for electromagnetically measuring of oil gas well stream of the present invention has three special benefits: the one, and dielectric property and the conductive characteristic difference identification borehole fluid of comprehensive utilization oil, gas and water are applicable to high and low moisture various situations; The 2nd, by in well, exciting the electromagnetic field of fascicular texture, to heterogeneous fluid flow section scanning survey repeatedly, can effectively overcome generally electrometric " soft " effect, high-resolution identification fluid media (medium); The 3rd, the electromagnetic array sensor is close to the borehole wall, need not invade fluid inside, and is very little to the mobile interference of the script of heterogeneous fluid in the well.In addition, this method belongs to functional imaging, have real-time, non-invasi, with low cost, use advantages such as convenient.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software embodiment or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form of the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make and carry out the sequence of operations step producing computer implemented processing at computer or other programmable devices, thereby be provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame in the instruction that computer or other programmable devices are carried out.
Used specific embodiment among the present invention principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. an oil gas well stream moves the imaging measurement method, it is characterized in that described method comprises:
With a plurality of measurement electrode rings and bucking electrode annulate shaft to the oil well wall that is arranged at intervals at detected fluid;
Select in each measurement electrode ring an electrode as exciting electrode in regular turn, excite described exciting electrode and with exciting electrode adjacent electrode up and down, generate the pencil electromagnetic field;
Select in regular turn in each measurement electrode ring with described exciting electrode at interval plural electrode receive the response signal of described fluid media (medium) as collecting electrode;
Handle flow parameter and the image that the back generates the detected fluid cross section according to the response signal that each electrode in each measurement electrode ring receives.
2. the moving imaging measurement method of oil gas well stream as claimed in claim 1 is characterized in that, the electrode that all has N equidistant annular arrangement of described measurement electrode ring and bucking electrode ring, wherein, and N〉6.
3. the moving imaging measurement method of oil gas well stream as claimed in claim 2 is characterized in that each electrode in the described measurement electrode ring is identical, and each electrode in the described bucking electrode ring is identical.
4. oil gas well stream as claimed in claim 1 moves the imaging measurement method, it is characterized in that described and exciting electrode adjacent electrode up and down comprise: the electrode adjacent with exciting electrode in the electrode adjacent with exciting electrode and the adjacent bucking electrode ring in the measurement electrode ring at described exciting electrode place.
5. the moving imaging measurement method of oil gas well stream as claimed in claim 4 is characterized in that, described excite described exciting electrode and with exciting electrode adjacent electrode up and down, generate the pencil electromagnetic field and comprise:
Supply with fixed, the frequency certain range of excitation signal of electrode one electric current weighing apparatus adjacent with exciting electrode in electrode adjacent with exciting electrode in described exciting electrode, the described measurement electrode ring and the adjacent bucking electrode ring, in detected fluid, generate the pencil electromagnetic field.
6. the moving imaging measurement method of oil gas well stream as claimed in claim 5 is characterized in that the cps of described pumping signal is nMHz.
7. the moving imaging measurement method of oil gas well stream as claimed in claim 1 is characterized in that, describedly selects in regular turn that plural electrode is as collecting electrode at interval with described exciting electrode in each measurement electrode ring, and the response signal that receives described fluid media (medium) comprises:
With described collecting electrode adjacent four electrode groundings up and down.
8. the moving imaging measurement method of oil gas well stream as claimed in claim 4 is characterized in that, described with described collecting electrode up and down adjacent four electrode groundings comprise:
With in the measurement electrode ring and the bucking electrode ring in the electrode grounding adjacent with described collecting electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310124577.9A CN103195408B (en) | 2013-04-11 | 2013-04-11 | Oil/gas Well flow imaging measuring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310124577.9A CN103195408B (en) | 2013-04-11 | 2013-04-11 | Oil/gas Well flow imaging measuring method |
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| CN103195408A true CN103195408A (en) | 2013-07-10 |
| CN103195408B CN103195408B (en) | 2016-05-18 |
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| CN201310124577.9A Expired - Fee Related CN103195408B (en) | 2013-04-11 | 2013-04-11 | Oil/gas Well flow imaging measuring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387066A (en) * | 2017-07-26 | 2017-11-24 | 中国石油大学(华东) | A kind of oil/gas drilling gas cut early detection method based on impedance bioelectrical measurement |
| CN113379036A (en) * | 2021-06-18 | 2021-09-10 | 西安石油大学 | Oil-gas image desensitization method based on context encoder |
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2013
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Patent Citations (4)
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| RU2270981C2 (en) * | 1999-10-28 | 2006-02-27 | Майкро Моушн, Инк. | System and method for measuring multi-phase stream |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107387066A (en) * | 2017-07-26 | 2017-11-24 | 中国石油大学(华东) | A kind of oil/gas drilling gas cut early detection method based on impedance bioelectrical measurement |
| CN107387066B (en) * | 2017-07-26 | 2020-05-26 | 中国石油大学(华东) | Gas invasion early-stage discovery method for oil and gas drilling based on electrical impedance measurement |
| CN113379036A (en) * | 2021-06-18 | 2021-09-10 | 西安石油大学 | Oil-gas image desensitization method based on context encoder |
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