CN2680855Y - Frequency domain complex resistivity logging tool - Google Patents
Frequency domain complex resistivity logging tool Download PDFInfo
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- CN2680855Y CN2680855Y CN 200420030612 CN200420030612U CN2680855Y CN 2680855 Y CN2680855 Y CN 2680855Y CN 200420030612 CN200420030612 CN 200420030612 CN 200420030612 U CN200420030612 U CN 200420030612U CN 2680855 Y CN2680855 Y CN 2680855Y
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Abstract
The utility model relates to a frequency domain complex resistivity logging tool, belonging to the device class of logging instrument for down-hole oil field. The oil field electrical logging in the prior art can only measure the values of down-hole formation resistivity, namely, the resistance value, but it can not measure the information of formation phase difference, therefore, the estimation for the formation oil saturation can be influenced, for this defect, the utility model adopts a design that a multi-frequency signal source, a data acquisition process, a controlling circuit, a monitoring circuit are arranged in the circuit in the upper part of a measuring electrode in down-hole instruments and combined with other circuits to sent signals from a multi-frequency signal source while in use. The monitoring circuit controls the value of a main circuit according to the condition of the measured formation; the measuring circuit measures the electric voltage of current which inflow into the formation and after being proceed by the data acquisition, signals can be sent to the ground, therefore, the users can obtain the complex resistivity values of the formation which reflect the true condition of the oil saturation under different frequencies. The device makes up the insufficiency in the oil saturation logging tools, besides, it has simple structure, and therefore, it can be widely used in the lateral logging instruments.
Description
Technical field:
The utility model relates to a kind of frequency domain complex resistivity logging (crl) instrument, belongs to oil field downhole logging instrument apparatus class.
Background technology:
At present, in the electrical log of oil field, can only measuring well sub-surface resistivity value as laterolog, be resistance value, can not measure phase difference information, and when measuring because Frequency point is few, can not fully extract the physical parameter on stratum, influence evaluation the stratum oil saturation.
The utility model content:
The utility model is in order to overcome above-mentioned shortcoming, and a kind of frequency domain complex resistivity logging (crl) instrument that provides, this instrument can extract information such as the formation resistivity of different frequency under several stratum and phase difference, and can obtain physical parameters such as formation resistivity values and oil saturation.
The utility model is achieved in that
This utility model is the data transmission circuit that is connected by lead by the data acquisition process of the electronic circuit in the downhole probe metal shell and control circuit, the main electrode A of current/voltage testing circuit, supervisory electronic circuit, power amplification circuit, master current source and electrically connected downhole probe electrode system
0, focusing electrode M
1, M
2With bucking electrode A
1, A
2Measurement electrode N, current supply circuit electrode B are formed; Be connected with a multifrequency controllable signal source in the data acquisition process control circuit in described downhole probe housing, described main electrode A
0, focusing electrode M
1, M
2With bucking electrode A
1, A
2Each electrode between separate with insulation materials.
Multifrequency controllable signal source in the downhole probe housing in the electronic circuit, data acquisition process and control circuit communicate, data acquisition process and control circuit and data transmission circuit and current/voltage testing circuit link, and supervisory electronic circuit is connected with master current source, supervisory electronic circuit and focusing electrode M
1, M
2Communicate current/voltage testing circuit and M
1Focusing electrode links to each other with measurement electrode N.
Described multifrequency controllable signal source comprises by sine wave generating circuit and gain control circuit to be formed.
Described data acquisition process and control circuit are made up of a single-chip microcomputer and analog-digital converter.
The utility model working method is:
Be installed in downhole probe housing interior multifrequency controllable signal source, supervisory electronic circuit, current/voltage testing circuit, data acquisition process and control circuit, master current source, power amplification circuit according to the control design cycle, the principal current and the screen stream of different frequency are injected in the down-hole formation by electrode system, simultaneously, electric current in the stratum and voltage signal are measured, just can obtain the complex resistivity value of different frequency down-hole formation as calculated, can obtain physical parameters such as down-hole formation oil saturation then according to interpretation model again.
The utility model compared with prior art has distinguishing feature and good effect.
Owing in the electronic circuit of existing technology, a multifrequency controllable signal power supply is arranged, this circuit can provide the complex resistivity value to measure required signal by the current-voltage measurement circuit by data acquisition and control circuit again, can obtain the geology response of stratum under different frequency, thereby set up the relation of physical parameter such as corresponding oil saturation and ground interlayer, the utility model has remedied the deficiency of current oil saturation logging program.
Description of drawings:
Fig. 1 is a connecting relation schematic diagram of the present utility model.
Fig. 2 is a structural representation of the present utility model.
Among the figure by 1, multifrequency controllable signal source, 2, data acquisition and control circuit, 3, data transmission circuit, 4, current/voltage testing circuit, 5, supervisory electronic circuit, 6, main electrode, 7, focusing electrode, 8, bucking electrode, 9, measurement electrode N, 10, the current supply circuit electrode B, 11, electrode system, 12, master current source, 13, power amplification circuit, 14, the downhole probe housing forms.
The specific embodiment:
The utility model is provided by following examples.
Below in conjunction with accompanying drawing the utility model is described further.
Among Fig. 1: electronic circuit 4 is placed in the downhole probe housing 14, multifrequency controllable signal source 1 is housed successively, data acquisition process and control circuit 2, data transmission circuit 3, current/voltage testing circuit 4,, supervisory electronic circuit 5, the integrated circuit board of master current source 12 and power amplification circuit 13, described circuit is connected with the downhole instrument electrode system 11 that is positioned at these downhole probe housing 14 belows by electric connecting mode, and downhole probe housing 14 is as the secondary shielding electrode.
Fig. 2, electronic circuit and electrode system annexation in downhole probe shell 14 have been showed.
Multifrequency controllable signal source 1 in the electronic circuit is connected with data acquisition process and control circuit 2, data acquisition process and control circuit are connected with data transmission circuit 3 and current/voltage testing circuit 4 again, supervisory electronic circuit 5 is communicated with master current source 12, current/voltage testing circuit 4 and focusing electrode M
1N is connected with measurement electrode.
Described multifrequency controllable signal power supply 1 is sine wave generating circuit and the gain control circuit that an integrated polylith chip is formed, and this signal source is subjected to the control of data acquisition process and control circuit 2; It can be according to stratum needs in the well, and timesharing produces the sine wave signal of different frequency and various amplitude, send to bucking electrode 8 in the electrode system, A by power amplification circuit 13 then
1And A
2Get on main electrode 6, can be by supervisory electronic circuit 5 to electrode M
1, M
2Potential difference exercise supervision, and then main electrode is carried out focus control to the electric current of stratum emission, make M
1, M
2On unnecessary potential difference be approximately 0 value so that reach best data acquisition state.
Described data acquisition process and control circuit 2 are a single-chip microcomputer and analog-digital converter, it is mainly used to control downhole instrument in electronic circuit, carry out work according to different modes and different measuring frequencies, and can regulate and change current potential on bucking electrode 8 and the main electrode 6 from the variation of the residing formation resistivity values of motion tracking electrode system, make instrument reach focus state, simultaneously can guarantee that again signal is undistorted this moment, and improve the ratio of making an uproar.
Claims (3)
1, a kind of frequency domain complex resistivity logging (crl) instrument is the data transmission circuit (3) that is connected by the electronic circuit data acquisition in the downhole probe housing (14) and control circuit (2), by lead, current/voltage testing circuit (4), supervisory electronic circuit (5), master current source (12) and with the main electrode A in the electrically connected electrode system (11)
0(6), focusing electrode M
1, M
2(7), bucking electrode A
1, A
2(8) form; It is characterized in that being connected with a multifrequency controllable signal source (1), described main electrode A in data acquisition process in the described downhole probe housing (14) and control circuit (2) loop
0, focusing electrode M
1, M
2, bucking electrode A
1, A
2Each electrode between separate with insulation materials.
2,, it is characterized in that multifrequency controllable signal source (1) is by the A in power amplifier and the bucking electrode (8) in downhole probe housing (14) electronic circuit according to the described a kind of frequency domain complex resistivity logging (crl) instrument of claim 1
1, A
2And master current source (12), data acquisition process and control circuit (2) are connected, data acquisition process links to each other with data transmission circuit (3) and current/voltage testing circuit (4) with control circuit (2), and supervisory electronic circuit (5) is connected with master current source (12), supervisory electronic circuit and focusing electrode M
1, M
2(7) communicate current/voltage testing circuit (4) and M
1Focusing electrode and measurement electrode N are connected.
3, according to the described a kind of frequency domain complex resistivity logging (crl) instrument of claim 1, it is characterized in that described multifrequency controllable signal source (1), is sine wave generating circuit and gain control circuit that an integrated polylith chip is formed.Described data acquisition process and control circuit (2) are made up of a single-chip microcomputer and analog-digital converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420030612 CN2680855Y (en) | 2004-03-01 | 2004-03-01 | Frequency domain complex resistivity logging tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420030612 CN2680855Y (en) | 2004-03-01 | 2004-03-01 | Frequency domain complex resistivity logging tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2680855Y true CN2680855Y (en) | 2005-02-23 |
Family
ID=34607256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420030612 Expired - Fee Related CN2680855Y (en) | 2004-03-01 | 2004-03-01 | Frequency domain complex resistivity logging tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2680855Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103643948A (en) * | 2013-12-16 | 2014-03-19 | 西南石油大学 | Dual-electrical azimuthal imaging logging instrument and method |
| CN103912264A (en) * | 2013-01-06 | 2014-07-09 | 中国石油化工股份有限公司 | Near-bit logging-while-drilling resistivity measuring device |
| CN105484740A (en) * | 2015-12-04 | 2016-04-13 | 中国石油天然气集团公司 | Multi-frequency detection device for detecting stratum complex resistivity |
-
2004
- 2004-03-01 CN CN 200420030612 patent/CN2680855Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912264A (en) * | 2013-01-06 | 2014-07-09 | 中国石油化工股份有限公司 | Near-bit logging-while-drilling resistivity measuring device |
| CN103912264B (en) * | 2013-01-06 | 2017-02-08 | 中国石油化工股份有限公司 | Near-bit logging-while-drilling resistivity measuring device |
| CN103643948A (en) * | 2013-12-16 | 2014-03-19 | 西南石油大学 | Dual-electrical azimuthal imaging logging instrument and method |
| CN103643948B (en) * | 2013-12-16 | 2017-05-31 | 西南石油大学 | A kind of Dual-electrical azimuthal imaging logging instrument and method |
| CN105484740A (en) * | 2015-12-04 | 2016-04-13 | 中国石油天然气集团公司 | Multi-frequency detection device for detecting stratum complex resistivity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050223 Termination date: 20130301 |