CN1366190A - Array-type lateral well logger with different layering powers - Google Patents
Array-type lateral well logger with different layering powers Download PDFInfo
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- CN1366190A CN1366190A CN 02104155 CN02104155A CN1366190A CN 1366190 A CN1366190 A CN 1366190A CN 02104155 CN02104155 CN 02104155 CN 02104155 A CN02104155 A CN 02104155A CN 1366190 A CN1366190 A CN 1366190A
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Abstract
The ivnention relates to an array logging tool in the side direction with various layering capabilities. It includes a multi-signal source, multiple groups of shielded electrodes, a monitoring device, a main electrode group, voltage measuring and processing set, and main electrode current detecting and processing set. The multi-signal source produces multiple working signals with different frequencies. Each group of shielded electrodes sends working signal to different layer of earth, meanwhile forms focusing electric field. The monitoring device receives and magnifies first working signal transmitted by multiple groups of shielded electrodes. The main electrode group includes a central electrode and multiple pairs of electrodes arranged outwards for signal refocusing. One measurement in the invention can obtain 12 apparent resistivity curves that describes the geology in detail, explains layers of earth in the orientation analysis, gives quantitative explanations to the problems of layers and alternate laminar layers.
Description
Technical field
The present invention relates to a kind of array lateralog, once can obtain the logging trace of multiple bed resolution with multiple bed resolution.
Background technology
Laterolog also claims the current focusing well logging, belongs to electrical log, is a kind of main method in the geophysical survey of oil field.
Generally speaking, hang in the well instrument and the power supply of past stratum, be provided with loop electrode (in fact loop electrode has only more than 20 meter from transmitting electrode) from the transmitting electrode infinity point through sheathed cable.When transmitting electrode had only one, it was sphere that this transmitter current is not focused equipotential surface, and this logging method is a departure curves.
When having guarded electrode on emitting electrode, the bucking current of guarded electrode emission and principal current are in the same way, equipotential plays focussing force to principal current, force principal current not dispersed and directly enter the stratum, and this kind effect is called focussing force.The focused log method is exactly laterolog.
The laterolog instrument is of a great variety, three side direction, heptalateral is arranged to, nine side direction (bilateral to) etc.Wherein bilateral is to belonging to best logging method, and along with the oil field prospecting exploitation needs, logging instrumentation is in continuous development.Bilateral can not satisfy the requirement of the geologic prospecting that becomes increasingly complex to the information that obtains (two kinds of two curves visiting the side degree of depth).In order to solve the resistivity measurement problem of stratum flushed zone, invaded zone, virgin zone, judge flushing, two original curves of invasion depth, be difficult to do quantitative interpretation and need more metrical information, better quantitatively judge flushed zone, invaded zone, virgin zone resistivity, judge invaded zone radius, flushed zone radius etc.
Array side is the main direction trend of lateral logging technology development at present.For example, the array lateralog of French Schlumberger well logging company exploitation can be obtained six curves of six kinds of detection degree, but has only a kind of bed resolution, thereby matter thin layer immeasurably, thereby can not analyze the oil reservoir distribution situation comprehensive and accurately.
Summary of the invention
The purpose of this invention is to provide a kind of array lateralog with multiple bed resolution, one-shot measurement of the present invention can obtain 12 apparent resistivity curves at least, geology can be described meticulously, accurately orientation analysis, explain the stratum, solved the explanation and the quantitative problem of geology thin layer, thin interbed.
Ultimate principle of the present invention is to utilize the focusing technology again to principal current that multiple bed resolution is provided.That is to say that under the effect of the electric field shielding of many set of shield electrode, the central electrode group provides a kind of bed resolution; And the outer electrode of central electrode group then makes the internal layer electrode output current be focused on once more to the internal layer electrode focusing electric field, thereby another bed resolution is provided.
Above-mentioned purpose of the present invention is achieved in that a kind of array lateralog with multiple bed resolution, comprising: a plurality of signal sources produce a plurality of working signals with different frequency; Many set of shield electrode, each set of shield electrode is connected with corresponding signal source respectively, to launch first working signal to Different Strata, forms the focusing electric field to central electrode group output signal simultaneously; Monitoring apparatus is used to receive and amplify first working signal of described many set of shield electrode emission; The central electrode group, under the electric field action of guarded electrode, focus on the main working signal of ground emission monitoring apparatus output to the stratum, wherein the central electrode group comprise a central electrode and from central electrode outwards be arranged in order many to electrode, the electric field that makes outer electrode forms once more the output signal of internal layer electrode and focuses on; The voltage measurement treating apparatus, the voltage of detection and processing central electrode; The current detecting treating apparatus detects and handles the electric current that flows through central electrode.
Wherein said monitoring apparatus comprises: the induction electrode of the working signal of at least one group of received guarded electrode; Amplify the quick follower amplifier of supervisory signals of the signal that induction electrode received.
Wherein the current detecting treating apparatus comprises a plurality of layering current detectors, detects total current that flows through the central electrode group and the electric current that flows through every pair of electrode and central electrode respectively.
Wherein the current detecting treating apparatus also comprises the corresponding processing section of a plurality of and a plurality of layering current detectors, and its each processing section comprises frequency-selecting amplifier, analog to digital converter and coding circuit.
Wherein the voltage measurement treating apparatus comprises frequency-selecting amplifier, analog to digital converter and coding circuit.
The present invention is described in detail with instantiation below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the synoptic diagram that has again the distribution of electrodes of focusing power of the present invention;
Fig. 2 is a principle schematic of the present invention.
Embodiment
Fig. 1 schematically shows the distribution of electrodes that has again focusing power of the present invention.6 set of shield electrode A 6 and A6 ', A5 and A5 ', A4 and A4 ', A3 and A3 ', A2 and A2 ', A1 and A1 ' are distributed in the both sides of central electrode group A01, A01 ', A00 symmetrically, wherein every set of shield electrode is such as A6 and A6 ', by the lead (not shown) that is connected.The effect of guarded electrode is: launch first working signal (bucking current), to form the focusing electric field to the central electrode group.The central electrode group comprises a central electrode A00 and one group of auxiliary electrode A01, A01 ' that is distributed in central electrode A00 both sides.The central electrode group totally in the focusing electric field effect of guarded electrode, provide a kind of bed resolution, and auxiliary electrode A01, the A01 ' of central electrode A00 both sides provides focusing electric field to central electrode A00, central electrode is focused once more, and another kind of bed resolution is provided.Clearly, the auxiliary electrode group that is distributed in central electrode A00 both sides can have a plurality of, and outer electrode forms internal layer electrode again and focuses on, thereby more bed resolution can be provided.Monitor electrode M1, M1 ' and N2 and M2 ' induction receive first working signal of guarded electrode emission.Potential electrode N is used for surveying work voltage.With regard to electrode, difference with the prior art of the present invention is to have increased the central electrode group.
Fig. 2 shows circuit theory of the present invention.As shown in the figure, the array lateralog with multiple bed resolution of the present invention comprises:
Produce a plurality of a plurality of signal sources with working signal of different frequency, its each signal source comprises an oscillator and a power amplifier;
Many set of shield electrode A 6 and A6 ', A5 and A5 ', A4 and A4 ', A3 and A3 ', A2 and A2 ', A1 and A1 ', each set of shield electrode is connected with corresponding signal source respectively, to launch first working signal to Different Strata, forms the focusing electric field to central electrode group output signal simultaneously;
Monitoring apparatus comprises the quick follower amplifier of monitor electrode M1, M1 ' and M2 and M2 ' and supervisory signals, is used to receive and amplify first working signal of described many set of shield electrode emission;
The central electrode group, under the electric field action of guarded electrode, focus on the main working signal of ground emission monitoring apparatus output to the stratum, wherein the central electrode group comprises a central electrode A00 and the pair of electrodes A01 that outwards is arranged in order from central electrode, A01 ' or many to electrode, make be in outer field electrode (such as, A01, A01 ') electric field to internal layer electrode (such as, A00) output signal forms once more and focuses on.Obviously, the electrode of central electrode group is many more, and the number of times of Ju Jiaoing is just many more again, thereby bed resolution is just many more;
The voltage measurement treating apparatus, the voltage of detection and processing central electrode;
The current detecting treating apparatus detects and handles the electric current that flows through central electrode.
The current detecting treating apparatus comprises a plurality of layering current detectors, detects total current that flows through the central electrode group and the electric current that flows through every pair of electrode and central electrode respectively.For the scheme of two kinds of bed resolutions, the electric current that flows through resistance R 1 is total principal current, and it can reflect the resistivity (first kind of bed resolution) on whole measurement stratum; What flow through resistance R 2 is the electric current of central electrode, the resistivity on the local stratum (thin layer) that it can the reflected measurement stratum.The voltage drop at resistance R 1 and R2 two ends provides the detection to electric current.The current detecting treating apparatus also comprises a plurality of and the corresponding processing section of layering current detector, and its each processing section comprises frequency-selecting amplifier, analog to digital converter and coding circuit.
The voltage measurement treating apparatus comprises frequency-selecting amplifier, analog to digital converter and coding circuit.
Because (signal source) used six kinds of different frequencies, six working signals with different frequency through electrode respectively according to separately loop flow, thereby obtain the apparent resistivity curve of the same stratum of reflection different depth.In fact, apparent resistivity is to obtain divided by the electric current that current sensing means detected by the voltage that voltage measuring apparatus is measured.Because the present invention can obtain two at least and detect electric current, and each current signal contains six different frequencies, so one-shot measurement of the present invention can obtain 12 apparent resistivity curves at least.
Need illustrate, the measured voltage and current of voltage measurement treating apparatus shown in Figure 2 detect electric current that treating apparatus detected respectively the coding circuit by separately send to apparent resistivity treatment circuit (not shown), carry out computing, obtain resistivity curve at last.Because the present invention adopts the resistivity treatment circuit identical with existing well logger, therefore omit its explanation.
Because the present invention has used focusing technology again, promptly utilizes the focussing force again of the internal electrode of outer electrode of central electrode, thereby multiple bed resolution is provided.
Claims (5)
1, a kind of array lateralog with multiple bed resolution comprises:
A plurality of signal sources produce a plurality of working signals with different frequency;
Many set of shield electrode, each set of shield electrode is connected with corresponding signal source respectively, to launch first working signal to Different Strata, forms the focusing electric field to central electrode group output signal simultaneously;
Monitoring apparatus is used to receive and amplify first working signal of described many set of shield electrode emission;
The central electrode group, under the electric field action of guarded electrode, focus on the main working signal of ground emission monitoring apparatus output to the stratum, wherein the central electrode group comprise a central electrode and from central electrode outwards be arranged in order many to electrode, the electric field that makes outer electrode forms once more the output signal of internal layer electrode and focuses on;
The voltage measurement treating apparatus, the voltage of detection and processing central electrode;
The current detecting treating apparatus detects and handles the electric current that flows through central electrode.
2, array lateralog according to claim 1, wherein said monitoring apparatus comprises: the induction electrode of the working signal of at least one group of received guarded electrode; Amplify the quick follower amplifier of supervisory signals of the signal that induction electrode received.
3, array lateralog according to claim 1, wherein the current detecting treating apparatus comprises a plurality of layering current detectors, detects total current that flows through the central electrode group and the electric current that flows through every pair of electrode and central electrode respectively.
4, array lateralog according to claim 1, wherein the current detecting treating apparatus also comprises the corresponding processing section of a plurality of and a plurality of layering current detectors, its each processing section comprises frequency-selecting amplifier, analog to digital converter and coding circuit.
5, array lateralog according to claim 1, wherein the voltage measurement treating apparatus comprises frequency-selecting amplifier, analog to digital converter and coding circuit.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02104155 CN1366190A (en) | 2002-03-12 | 2002-03-12 | Array-type lateral well logger with different layering powers |
| CN 02256801 CN2594811Y (en) | 2002-03-12 | 2002-09-26 | Array microresistivity logging instruments with multiple laminar capacity |
| CN 02131051 CN1444056A (en) | 2002-03-12 | 2002-09-26 | Array laterologging instrument with several vertical resolutions |
| CN 02131052 CN1444055A (en) | 2002-03-12 | 2002-09-26 | Array microresistivity logging insturment with several vertical resolutions |
| CN 02256600 CN2594810Y (en) | 2002-03-12 | 2002-09-26 | Array lateral logging instruments with multiple laminar capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02104155 CN1366190A (en) | 2002-03-12 | 2002-03-12 | Array-type lateral well logger with different layering powers |
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| Publication Number | Publication Date |
|---|---|
| CN1366190A true CN1366190A (en) | 2002-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02104155 Pending CN1366190A (en) | 2002-03-12 | 2002-03-12 | Array-type lateral well logger with different layering powers |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899973A (en) * | 2010-05-10 | 2010-12-01 | 中国石油天然气集团公司 | Method for measuring formation water resistivity and device thereof |
| CN101315027B (en) * | 2008-06-25 | 2011-11-16 | 中国海洋石油总公司 | Apparatus for detecting transmitted signal of electromagnetic wave logging instrument |
| CN111364968A (en) * | 2020-03-24 | 2020-07-03 | 中国海洋石油集团有限公司 | Resistivity logging instrument and resistivity measuring method |
| CN111929740A (en) * | 2020-07-30 | 2020-11-13 | 吉艾（天津）石油工程有限公司 | Array lateral logging instrument and control method thereof |
| CN114778948A (en) * | 2022-06-17 | 2022-07-22 | 中铁大桥科学研究院有限公司 | Method for monitoring resistivity of rock mass of flowing water tunnel and related equipment |
-
2002
- 2002-03-12 CN CN 02104155 patent/CN1366190A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315027B (en) * | 2008-06-25 | 2011-11-16 | 中国海洋石油总公司 | Apparatus for detecting transmitted signal of electromagnetic wave logging instrument |
| CN101899973A (en) * | 2010-05-10 | 2010-12-01 | 中国石油天然气集团公司 | Method for measuring formation water resistivity and device thereof |
| CN101899973B (en) * | 2010-05-10 | 2013-06-05 | 中国石油天然气集团公司 | Method for measuring formation water resistivity and device thereof |
| CN111364968A (en) * | 2020-03-24 | 2020-07-03 | 中国海洋石油集团有限公司 | Resistivity logging instrument and resistivity measuring method |
| CN111929740A (en) * | 2020-07-30 | 2020-11-13 | 吉艾（天津）石油工程有限公司 | Array lateral logging instrument and control method thereof |
| CN111929740B (en) * | 2020-07-30 | 2022-06-03 | 吉辰智能设备集团有限公司 | Array lateral logging instrument and control method thereof |
| CN114778948A (en) * | 2022-06-17 | 2022-07-22 | 中铁大桥科学研究院有限公司 | Method for monitoring resistivity of rock mass of flowing water tunnel and related equipment |
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