CN106761726A - Oil base drilling fluid is with brill lateral position well logging apparatus and method - Google Patents
Oil base drilling fluid is with brill lateral position well logging apparatus and method Download PDFInfo
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- CN106761726A CN106761726A CN201710028716.6A CN201710028716A CN106761726A CN 106761726 A CN106761726 A CN 106761726A CN 201710028716 A CN201710028716 A CN 201710028716A CN 106761726 A CN106761726 A CN 106761726A
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- 238000005553 drilling Methods 0.000 title claims abstract description 52
- 239000012530 fluid Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 24
- 241001074085 Scophthalmus aquosus Species 0.000 title claims abstract description 17
- 230000005284 excitation Effects 0.000 claims abstract description 27
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000005086 pumping Methods 0.000 claims description 5
- 108010076504 Protein Sorting Signals Proteins 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000037361 pathway Effects 0.000 claims description 2
- 230000006698 induction Effects 0.000 claims 1
- 238000003384 imaging method Methods 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 6
- 230000005674 electromagnetic induction Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/005—Testing the nature of borehole walls or the formation by using drilling mud or cutting data
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a kind of oil base drilling fluid with brill lateral position well logging apparatus and method.It includes：Simple alternating current driving source, with boring lateral position logging sensor, signal acquisition module and computer.The present invention substitutes traditional directly excitation mode using the energisation mode based on electromagnetic induction principle, overcomes the limitation of the latter；The equivalent-circuit model of well logging is set up based on Capacitance Coupled principle, the current signal test problems under oil base drilling fluid are solved using digital phase-sensitive demodulation techniques；Using the electrode of button shape, the detection to different azimuth overlying strata is realized, and then the well logging informations such as formation resistivity imaging can be obtained in drilling process.The present invention has the advantages that simple and reliable for structure, certainty of measurement is high, measurement range is big, for the well logging under the conditions of oil base drilling fluid provides a kind of method for being available for reference.
Description
Technical field
The present invention relates to oil well logging field, more particularly to a kind of oil base drilling fluid is with brill lateral position well logging apparatus and side
Method.
Background technology
Well logging refers to the geophysical properties such as electrochemical properties, conductive characteristic, acoustic characteristic, the radioactivity of utilization rock stratum,
The method for measuring geophysical parameterses.Logging technique is used to explore the petroleum resources in stratum, sufficient with lifting in the oil industry
The status of weight.According to the difference of logging mode, logging method can be divided into wireline logging and the major class of well logging two, wireline logging
Well measurements under ability are had to after the completion of drilling well, and well logging LWD (Logging While Drilling) is in drilling well
Geologic parameter measurement is carried out while operation.Logging while drilling technology due to its good real-time, the accuracy of measurement data and
Relatively low operating cost, just gradually replaces traditional wireline logging, is played an important role in directional well drilling.
Drilling fluid is the circulation flushing medium used in well in drilling process.Drilling fluid is the blood of drilling well, also known as
Drilling fluid.It is empty that drilling fluid can be divided into clear water, mud, free clay phase flushing liquor, emulsion, foam and compression by constituent
Gas etc..Mud is widely used drilling fluid, is primarily adapted for use in loose, cranny development, easy collapsing and breaking, water-swellable peeling etc.
Hole wall unstable formation.At this stage, with the progress of drilling technology, oil base drilling fluid has reduction formation damage, increasing because of it
The advantages of strong borehole wall stability, increasingly it is widely applied in drillng operation.However, the presence meaning of oil base drilling fluid
And add dielectric between the detecting electrode of original directly contact and tested stratum, it has blocked DC channel so that
Logging while drilling technology under common water-base drilling fluid is no longer applicable.
The present invention is based on Capacitance Coupled and electromagnetic induction principle, devises a kind of oil base drilling fluid and is logged well with lateral position is bored
Apparatus and method.The device can overcome the problem that traditional well logging method cannot work in oil base drilling fluid, and energy
It is enough further to obtain azimuthal formation information, with important application value.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of oil base drilling fluid is filled with lateral position well logging is bored
Put and method.
Technical scheme is as follows：
A kind of oil base drilling fluid is with brill lateral position well logging apparatus, it is characterised in that including simple alternating current driving source, with brill
Lateral position logging sensor, signal acquisition module and computer, described includes boring with brill lateral position logging sensor
Quickly, drill bit, helical annular excitation coil and some button electrodes；In logging operation, with brill lateral position logging sensor position
In in well, being full of oil base drilling fluid with the gap for boring lateral position logging sensor and the borehole wall, be then outside well by
Geodetic layer；Described helical annular excitation coil is made up of toroidal core and the coil being wound on toroidal core；Helical annular
Excitation coil is arranged on drill collar, is mutually insulated with drill collar, and is connected with simple alternating current driving source, and some button electrodes inlay installation
At the different height of drill collar bottom, a button electrode array is collectively formed；Each button electrode contains a dead ring, absolutely
Edge ring causes that drill collar and button electrode are not contacted, and button electrode is connected by signal acquisition module with drill collar bottom, signal acquisition
Module is connected with computer
In the present invention, described button electrode is inlayed installed in drill collar bottom, and each button electrode contains one absolutely
Edge ring, make electrode not with drill collar directly contact, button electrode is connected by signal acquisition module with drill collar bottom, using empty short original
Reason keeps the potential of button electrode and drill collar bottom consistent.
Preferably, described helical annular excitation coil is arranged on the top of drill collar.
Oil base drilling fluid is with as follows the step of boring lateral position logging method：
1) pumping signal of setting simple alternating current driving source isWherein UiFor simple alternating current swashs
The virtual value of voltage is encouraged, f is the frequency of driving voltage, is based on electromagnetism sense with the energisation mode of brill lateral position logging sensor
Answer principle；Helical annular excitation coil can regard the primary side of transformer as, and its number of turn is Nt；Drill collar regards the secondary of transformer as,
Its number of turn is 1；In sinusoidal excitation voltage uiIn the presence of, induced electromotive force can be produced on drill collar, with helical annular excitation line
It is boundary to enclose, and the potential on drill collar top is defined as into 0, and bottom potential is defined asWherein k allow for electromagnetic consumable and
The sensor coefficient of definition；
2) button electrode have exchange potential with drill collar bottom identical, based on Capacitance Coupled principle, ac-excited
Under effect, button electrode forms coupled capacitor C with the borehole wall by oil base drilling fluid1, stratum is equivalent into an apparent resistance Rf, the borehole wall
Coupled capacitor C is formed with drill collar top2, three be in series composition one AC measurment circuit；From the exchange of button electrode
Electric current i0The AC measurment circuit pathways are flowed through, drill collar top is eventually returned to.Note：One part of current is directly through oil base drilling fluid
It is returned directly to drill collar top and without stratum, but oil base drilling fluid coupled capacitor C3It is relatively very big, thus it is negligible.
3) due to coupled capacitor C1And C2Presence, alternating current i0Phase and driving voltage uiDiffered in phase
Alternating current i0Digital signal sequences u is converted into by signal acquisition module0(n), and send computer to.In the upper of computer
On the machine of position, u can be tried to achieve using digital phase-sensitive demodulation techniques0The amplitude A of (n)0And phaseThen, it is equivalent according to simplified well logging
Circuit model, can be in the hope of stratum apparent resistance RfEtc. parameter：
Then, the apparent resistance based on known different azimuth stratum, can further obtain formation resistivity imaging etc. and survey
Well information.
The present invention has the advantage that compared with prior art：
1) using Capacitance Coupled principle and digital phase demodulation technology, simplified well logging circuit model is established, is solved
Current signal test problems under oil base drilling fluid.
2) using the energisation mode based on electromagnetic induction principle, the directly excitation mode of traditional cable well logging is substituted, is being bored
Induced potential quickly is produced with button electrode, it is simple and reliable.On the other hand, as button electrode, drill collar can also launch electricity
Stream.Because drill collar is identical with the potential on button electrode, therefore drill collar electric current has focussing force to electrode current, so as to increase
The stratum detecting depth of button electrode.
3) using the electrode of button shape, the detection to different azimuth overlying strata is realized, and then can be obtained in drilling process
Obtain the well logging informations such as formation resistivity imaging.
Brief description of the drawings
Fig. 1 is oil base drilling fluid with the structural representation for boring lateral position well logging apparatus；
Fig. 2 is with the structural representation for boring lateral position logging sensor；
Fig. 3 is the scheme of installation of button electrode；
Fig. 4 is the schematic equivalent circuit of logging sensor；
Fig. 5 is the schematic diagram of well logging equivalent-circuit model；
Fig. 6 is simplified well logging equivalent-circuit model schematic diagram.
In figure：Simple alternating current driving source 1, with boring lateral position logging sensor 2, signal acquisition module 3, computer 4, bore
Quickly 5, drill bit 6, helical annular excitation coil 7, button electrode 8, stratum to be measured 9, well 10, oil base drilling fluid 11, dead ring 12.
Specific embodiment
As shown in figure 1, oil base drilling fluid is lateral including simple alternating current driving source 1, with boring with lateral position well logging apparatus are bored
Orientation logging sensor 2, signal acquisition module 3 and computer 4.Simple alternating current driving source 1 is to be passed with brill lateral position well logging
Sensor 2 provides pumping signal, by with boring tested current signal that lateral position logging sensor 2 produces through signal acquisition module 3
Amplify, gather, be sent to and make further signal transacting on computer 4.
As shown in Fig. 2 including with lateral position logging sensor 2 is bored：Drill collar 5, drill bit 6, helical annular excitation coil 7 and
Some button electrodes 8.In logging operation, it is located in well 10 with lateral position logging sensor 2 is bored, is filled in both gaps
Oil base drilling fluid 11 is expired.It is then tested stratum 9 outside well 10.Described helical annular excitation coil 7 is by high magnetic permeability
Toroidal core and the coil that is wound on magnetic core constitute.Helical annular excitation coil 7 is arranged on drill collar, mutually exhausted with drill collar 5
Edge, and be connected with simple alternating current driving source 1.Some button electrodes 8 are inlayed at the different height of the bottom of drill collar 5, jointly
Constitute a button electrode array.Each button electrode 8 contains a dead ring 12, and by signal acquisition module 3 and drill collar 5
Bottom is connected.Signal acquisition module 3 is connected with computer 4.Described helical annular excitation coil 7 is arranged on the top of drill collar 5.
As shown in figure 3, button electrode 8 is inlayed installed in the bottom of drill collar 5.Each button electrode 8 contains an insulation
Ring 12, make electrode not with the directly contact of drill collar 5.Button electrode is connected by signal acquisition module 3 with the bottom of drill collar 5, using void
Short principle keeps the potential of button electrode 8 and the bottom of drill collar 5 consistent.
As shown in figure 4, being using the flow of apparatus and method detection different azimuth overlying strata information：Simple alternating current is encouraged
Be added in pumping signal on helical annular excitation coil 7 by source 1.Helical annular excitation coil 7 as transformer primary side, its number of turn
It is Nt, drill collar 5 as transformer secondary, its number of turn be 1.In sinusoidal excitation voltage uiIn the presence of, can be produced on drill collar (5)
Raw induced electromotive force, is boundary with helical annular excitation coil (7), and the potential on drill collar (5) top is defined as into 0, bottom potential
It is defined asThe sensor coefficient that wherein k allows for electromagnetic consumable and defines；Button electrode 8 utilizes signal acquisition mould
The empty short principle of block 3 is obtained and the bottom identical potential of drill collar 5.From the probe current i that button electrode 8 is launched0Flow through oil base
Drilling fluid 11 and tested stratum 9, and the top of drill collar 5 is returned to through oil base drilling fluid 11, constitute an alternating current path.i0Adopted through signal
The operational amplifier for collecting module 3 is enlarged into u0, transmitted to computer 4 after being collected.Computer 4 utilizes digital phase-sensitive demodulating algorithm
Real part, the imaginary part of probe current are obtained, so as to obtain stratum apparent resistance, and then the information such as formation resistivity imaging can be obtained.
Oil base drilling fluid is with as follows the step of boring lateral position logging method：
1) pumping signal of setting simple alternating current driving source isWherein UiFor simple alternating current swashs
The virtual value of voltage is encouraged, f is the frequency of driving voltage.The energisation mode of sensor is based on electromagnetic induction principle.Spiral rings
Shape excitation coil can regard the primary side of transformer as, and its number of turn is Nt；Drill collar regards the secondary of transformer as, and its number of turn is 1.In sine
Driving voltage uiIn the presence of, induced electromotive force can be produced on drill collar (5), it is boundary with helical annular excitation coil (7), will
The potential on drill collar (5) top is defined as 0, and bottom potential is defined asWherein k allows for electromagnetic consumable and defines
Sensor coefficient；
2) as shown in figure 5, being based on Capacitance Coupled principle, in the presence of ac-excited, button electrode 8 is with the borehole wall by oil
Base drilling fluid 11 forms coupled capacitor C1, stratum 9 can be with equivalent into an apparent resistance Rf, coupling is formed again at the borehole wall and the top of drill collar 5
Electric capacity C2, three be in series composition one AC measurment circuit.From the alternating current i of button electrode 8s0The exchange is flowed through to lead to
Road, is eventually returned to the top of drill collar 5.Note：One part of current be returned directly to drill collar top directly through oil base drilling fluid and without
Stratum, but oil base drilling fluid coupled capacitor C3It is relatively very big, therefore negligible, simplified well logging equivalent-circuit model such as Fig. 6 institutes
Show.
3) due to the presence of oil base drilling fluid coupled capacitor, alternating current i0Phase and driving voltage uiThe phase in phase
DifferenceAlternating current i0Digital signal sequences u is converted into by signal acquisition module0(n), and send computer to.In computer
Host computer on, can try to achieve u using digital phase-sensitive demodulation techniques0The amplitude A of (n)0And phaseThen, according to simplified well logging
Equivalent-circuit model, can be in the hope of stratum apparent resistance RfEtc. parameter：
Then, the apparent resistance based on known different azimuth stratum, can further obtain formation resistivity imaging etc. and survey
Well information.
Be directed to designed oil base drilling fluid carries out a series of emulation experiment with lateral position well logging apparatus are bored, and verifies
The feasibility of method.There is horizontal high resistant formation at target locations in stratum is tested, incline high resistant formation at target locations, high resistant target rock mass
When, the method can more clearly distinguish formation resistivity imaging, and measurement result is ideal.
Claims (3)
1. a kind of oil base drilling fluid is with brill lateral position well logging apparatus, it is characterised in that including simple alternating current driving source (1), with brill
Lateral position logging sensor (2), signal acquisition module (3) and computer (4), described senses with brill lateral position well logging
Device (2) includes drill collar (5), drill bit (6), helical annular excitation coil (7) and some button electrodes (8)；In logging operation, with
Lateral position logging sensor (2) is bored in well (10), with the gap for boring lateral position logging sensor (2) and the borehole wall
It is then tested stratum (9) outside well (10) full of oil base drilling fluid (11)；Described helical annular excitation coil (7) by
Toroidal core and the coil being wound on toroidal core are constituted；The helical annular excitation coil (7) on drill collar (5), with brill
Quickly (5) are mutually insulated, and are connected with simple alternating current driving source (1), and some button electrodes (8) are inlayed installed in drill collar (5) bottom
At different height, a button electrode array is collectively formed；Each button electrode (8) contains a dead ring (12), dead ring
(12) such that drill collar (5) and button electrode (8) are not contacted, button electrode (8) is by under signal acquisition module (3) and drill collar (5)
Portion is connected, and signal acquisition module (3) is connected with computer (4).
2. oil base drilling fluid according to claim 1 is with brill lateral position well logging apparatus, it is characterised in that described helical
Top of the ring-shaped excitation coil (7) installed in drill collar (5).
3. a kind of oil base drilling fluid using device as claimed in claim 1 is with brill lateral position logging method, it is characterised in that
Its step of, is as follows：
1) pumping signal of setting simple alternating current driving source (1) isWherein UiFor simple alternating current is encouraged
The virtual value of voltage, f is the frequency of driving voltage, is based on electromagnetism with the energisation mode of brill lateral position logging sensor (2)
Principle of induction；Helical annular excitation coil (7) can regard the primary side of transformer as, and its number of turn is Nt；Drill collar (5) regards transformer as
Secondary, its number of turn be 1；In sinusoidal excitation voltage uiIn the presence of, induced electromotive force can be produced on drill collar (5), with helical
Ring-shaped excitation coil (7) is boundary, and the potential on drill collar (5) top is defined as into 0, and bottom potential is defined asWherein k is
The sensor coefficient defined in view of electromagnetic consumable；
2) button electrode (8) is with drill collar (5) bottom identical with potential is exchanged, based on Capacitance Coupled principle, ac-excited
In the presence of, button electrode forms coupled capacitor C with the borehole wall by oil base drilling fluid (11)1, stratum is equivalent into an apparent resistance
Rf, coupled capacitor C is formed at the borehole wall and drill collar (5) top2, three be in series composition one AC measurment circuit；From button electrode
(8) the alternating current i for setting out0The AC measurment circuit pathways are flowed through, drill collar (5) top is eventually returned to；
3) due to coupled capacitor C1And C2Presence, alternating current i0With driving voltage uiDiffered in phaseAlternating current i0It is logical
Cross signal acquisition module (3) and be converted into digital signal sequences u0(n), and send computer (4) to, on computer (4), utilize
Digital phase-sensitive demodulation techniques try to achieve u0The amplitude A of (n)0And phaseTry to achieve stratum apparent resistance Rf：
Then, the apparent resistance based on known different azimuth stratum, you can obtain formation resistivity image-forming information.
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| CN201710028716.6A CN106761726B (en) | 2017-01-16 | 2017-01-16 | Oil base drilling fluid is with brill lateral position well logging apparatus and method |
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|---|---|---|---|
| CN201710028716.6A CN106761726B (en) | 2017-01-16 | 2017-01-16 | Oil base drilling fluid is with brill lateral position well logging apparatus and method |
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| CN106761726B CN106761726B (en) | 2019-10-15 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798656A (en) * | 2018-05-30 | 2018-11-13 | 中国海洋石油集团有限公司 | A kind of method and device for realizing resistivity measurement based on connector for logging while drilling |
| CN108868743A (en) * | 2018-06-19 | 2018-11-23 | 中国海洋石油集团有限公司 | A kind of resistivity tool |
| CN109488291A (en) * | 2018-11-09 | 2019-03-19 | 中国海洋石油集团有限公司 | A kind of resistivity logging while drilling logging method and measuring device |
| CN111197484A (en) * | 2018-11-16 | 2020-05-26 | 中国石油化工股份有限公司 | Formation resistivity imaging electrode device while drilling |
| CN112305622A (en) * | 2019-08-02 | 2021-02-02 | 中国石油化工股份有限公司 | Resistivity imaging device |
| CN115596432A (en) * | 2022-09-02 | 2023-01-13 | 延安通源石油工程技术服务有限公司（Cn） | Signal transmission method, system, vertical drill and computer readable storage medium |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798656A (en) * | 2018-05-30 | 2018-11-13 | 中国海洋石油集团有限公司 | A kind of method and device for realizing resistivity measurement based on connector for logging while drilling |
| CN108798656B (en) * | 2018-05-30 | 2021-12-10 | 中国海洋石油集团有限公司 | Method and device for realizing resistivity measurement based on logging while drilling instrument |
| CN108868743A (en) * | 2018-06-19 | 2018-11-23 | 中国海洋石油集团有限公司 | A kind of resistivity tool |
| CN109488291A (en) * | 2018-11-09 | 2019-03-19 | 中国海洋石油集团有限公司 | A kind of resistivity logging while drilling logging method and measuring device |
| CN111197484A (en) * | 2018-11-16 | 2020-05-26 | 中国石油化工股份有限公司 | Formation resistivity imaging electrode device while drilling |
| CN112305622A (en) * | 2019-08-02 | 2021-02-02 | 中国石油化工股份有限公司 | Resistivity imaging device |
| CN112305622B (en) * | 2019-08-02 | 2024-05-24 | 中国石油化工股份有限公司 | Resistivity imaging device |
| CN115596432A (en) * | 2022-09-02 | 2023-01-13 | 延安通源石油工程技术服务有限公司（Cn） | Signal transmission method, system, vertical drill and computer readable storage medium |
| CN115596432B (en) * | 2022-09-02 | 2024-06-18 | 延安通源石油工程技术服务有限公司 | Signal transmission method, system, vertical drill and computer readable storage medium |
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|---|---|
| CN106761726B (en) | 2019-10-15 |
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