CN204344117U - The analogue experiment installation that coal bed gas horizontal well country rock affects resistivity logging - Google Patents
The analogue experiment installation that coal bed gas horizontal well country rock affects resistivity logging Download PDFInfo
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- CN204344117U CN204344117U CN201420691905.3U CN201420691905U CN204344117U CN 204344117 U CN204344117 U CN 204344117U CN 201420691905 U CN201420691905 U CN 201420691905U CN 204344117 U CN204344117 U CN 204344117U
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Abstract
The analogue experiment installation that in coal bed gas horizontal well, country rock affects resistivity logging, comprise resistivity measurement system and system under test (SUT), system under test (SUT) comprises the tank be fixed on support bracket, epoxy gluing model coal seam is placed in tank, drill bit is adopted to drill through the simulation well of semicircle along simulation top, coal seam in epoxy gluing model coal seam, the resistivity in epoxy resins consolidated model coal seam is first measured during operation, then in tank, water is filled, and by adding NaCl and water-purifying apparatus changes resistivity of water in tank, the resistivity in epoxy resins consolidated model coal seam is measured in variable concentrations NaCl solution situation, and be transferred to computer and preserve, the utility model apparatus structure is simple, easy to operate, strong adaptability.
Description
Technical field
The utility model relates to the logging technique in coal bed gas horizontal well exploration and development, what be specifically related to is the analogue experiment installation that a kind of coal bed gas horizontal well country rock affects resistivity logging.
Background technology
Along with the significantly propelling of CBM exploration and development, horizontal well quantity has had very large increase.In coal bed gas horizontal well, when coal seam is thinner, deep investigation resistivity logging can detect apart from well center compared with the formation resistivity in far range, so the impact of country rock on resistivity measurements is larger, often can not be ignored, make its resistivity measurements be difficult to reflect the true electrical property feature in original state coal seam.
At present, someone devises the analogue experiment installation that environmental factor affects resistivity log response, such as horizontal well mud asymmetry invade, Influence from Eccentric, or for be that in straight well, country rock affects resistivity log response.These experimental facilitiess, mainly for be petroleum gas, coal bed gas straight well, or petroleum gas horizontal well.Special country rock of researching and developing for coal bed gas horizontal well still belongs to blank to the analogue experiment installation of resistivity log response.Lacking of this device, to hinder in coal bed gas horizontal well country rock to the further research of resistivity log response Influencing Mechanism.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the purpose of this utility model is to provide the analogue experiment installation that in coal bed gas horizontal well, country rock affects resistivity logging, the resistivity in coal seam can be measured, for solving the device problem that in the coal bed gas horizontal well that lacks at present, country rock measures resistivity logging impact when shoulder-bed resistivity (SBR) is different.
In order to achieve the above object, the technical solution of the utility model is:
The analogue experiment installation that in coal bed gas horizontal well, country rock affects resistivity logging, comprises resistivity measurement system and system under test (SUT);
Described system under test (SUT) comprises the tank 13 be fixed on support bracket 15, epoxy gluing model coal seam 1 is placed in tank 13, adopt drill bit to drill through the simulation well 2 of semicircle along simulation top, coal seam in epoxy gluing model coal seam 1, during measurement, in tank 13, be filled with NaCl solution 14.
Described resistivity measurement system comprises resistivity logging inserting tube 4, resistivity logging inserting tube 4 is placed in the epoxy gluing model coal seam 1 of system under test (SUT), resistivity logging inserting tube 4 one end stube cable 6, cable 6 is connected with logging cable winch 8 through side direction pulley 7, logging cable winch 8 connects the signal port of well logging control panel 11 and computer 10 successively by signal transmssion line 9, resistivity logging inserting tube 4 loads centralizer 5, the connection of resistivity logging inserting tube 4 other end is dragged and is drawn steel wire 3 one end, drag and draw steel wire 3 other end and be connected with drive 16, drive 16 and side direction pulley 7 are fixed by respective pulley fixed support 12.
The utility model has following beneficial effect: the utility model can measure shoulder-bed resistivity (SBR) different time coal seam resistivity, verify the resistivity log response feature in country rock and coal seam, and disclose the Influencing Mechanism of country rock to resistivity logging; The utility model apparatus structure is simple, easy to operate, strong adaptability.
This utility model is at home first for coal bed gas horizontal well, have developed the analogue experiment installation that country rock affects resistivity log response, effectively can carry out the experimental study of coal bed gas horizontal well resistivity, for the research of country rock to resistivity log response Influencing Mechanism provides a kind of new way.
Accompanying drawing explanation
Accompanying drawing is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, makes the object of the utility model embodiment, technical scheme and advantage clearly,
With reference to accompanying drawing, the analogue experiment installation that in coal bed gas horizontal well, country rock affects resistivity logging, comprises resistivity measurement system and system under test (SUT);
Described system under test (SUT) comprises the tank 13 be fixed on support bracket 15, epoxy gluing model coal seam 1 is placed in tank 13,60mm drill bit is adopted to drill through the simulation well 2 of semicircle along simulation top, coal seam in epoxy gluing model coal seam 1, make well 2 normal in creeping into as far as possible, if exist expanding, available granulated coal and the filling of rotten rib coal, be filled with the NaCl solution 14 of variable concentrations in tank 13 during measurement.
Described resistivity measurement system comprises resistivity logging inserting tube 4, resistivity logging inserting tube 4 is placed in epoxy gluing model coal seam 1, resistivity logging inserting tube 4 one end stube cable 6, cable 6 is connected with logging cable winch 8 through side direction pulley 7, logging cable winch 8 connects the signal port of well logging control panel 11 and computer 10 successively by signal transmssion line 9, and the resistivity that resistivity logging inserting tube 4 records is transferred to computer 10 stores through cable 6, signal transmssion line 9.In resistivity logging process, regulate picking rate according to well logging control panel 11, and detect the running status of resistivity logging inserting tube.Resistivity logging inserting tube 4 loads centralizer 5, the connection of resistivity logging inserting tube 4 other end is dragged and is drawn steel wire 3 one end, drag and draw steel wire 3 other end and be connected with drive 16, drive 16 and side direction pulley 7 are fixed by respective pulley fixed support 12, by regulating the height of drive 16 and side direction pulley 7, and use centralizer 5, make its inserting tube of logging well occupy well center.
The utility model test process is: first for the preparation of epoxy resins consolidated model coal seam 1 and the well 2 of simulated experiment, place resistivity logging inserting tube 4, resistivity logging inserting tube 4 is first used to measure the resistivity in epoxy resins consolidated model coal seam 1 during operation, resistivity curve is measured by well logging control panel 11, then in tank 14, water is filled, and by adding NaCl and water-purifying apparatus changes resistivity of water in tank, the resistivity in epoxy resins consolidated model coal seam is measured in variable concentrations NaCl solution situation, resistivity signal is recorded by resistivity logging inserting tube 4, by the resistivity signal that measures by cable 6, signal transmssion line 9 is transferred to well logging control panel 11 and shows, and be transferred to computer 10 and preserve.
Apply this device, resistivity logging inserting tube 4 at the uniform velocity moves according to practical logging speed from left to right, i.e. the change of coal seam resistivity under detectable shoulder-bed resistivity (SBR) different condition, and under especially can measuring horizontal hole 2 condition, country rock is on the impact of resistivity log response; By the resistivity that contrast records time different without resistivity, country rock under wall rock condition, namely realize the simulated experiment that horizontal well country rock affects resistivity log response, find out the inherent quantitative relationship in horizontal well between country rock and resistivity log response.Therefore, it is possible to the impact of more real quantification simulation real standard well country rock on coal seam resistivity is key innovation place of the present utility model.
The utility model embodiment provides a kind of experimental facilities can simulated coal bed gas horizontal well resistivity log response, for verifying the theory that country rock in horizontal well affects resistivity logging and numerical simulation result, this device has important practical be worth for verifying the Influencing Mechanism of country rock to resistivity log response.
Above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although be described in detail the utility model embodiment with reference to previous embodiment, those skilled in the art is to be understood that: it still can be modified to the technical scheme described in previous embodiment, and these amendments, do not make the essence of appropriate technical solution depart from the category of the utility model embodiment technical scheme.
Claims (2)
1. the analogue experiment installation that in coal bed gas horizontal well, country rock affects resistivity logging, comprises resistivity measurement system and system under test (SUT), it is characterized in that,
Described system under test (SUT) comprises the tank (13) be fixed on support bracket (15), epoxy gluing model coal seam (1) is placed in tank (13), adopt drill bit to drill through the simulation well (2) of semicircle along simulation top, coal seam in epoxy gluing model coal seam (1), during measurement, in tank (13), be filled with NaCl solution (14).
2. the analogue experiment installation that in coal bed gas horizontal well according to claim 1, country rock affects resistivity logging, is characterized in that,
Described resistivity measurement system comprises resistivity logging inserting tube (4), resistivity logging inserting tube (4) is placed in the epoxy gluing model coal seam (1) of system under test (SUT), resistivity logging inserting tube (4) one end stube cable (6), cable (6) is connected with logging cable winch (8) through side direction pulley (7), logging cable winch (8) connects the signal port of well logging control panel (11) and computer (10) successively by signal transmssion line (9), resistivity logging inserting tube (4) loads centralizer (5), the connection of resistivity logging inserting tube (4) other end is dragged and is drawn steel wire (3) one end, drag and draw steel wire (3) other end and be connected with drive (16), drive (16) and side direction pulley (7) are fixed by respective pulley fixed support (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420691905.3U CN204344117U (en) | 2014-11-18 | 2014-11-18 | The analogue experiment installation that coal bed gas horizontal well country rock affects resistivity logging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420691905.3U CN204344117U (en) | 2014-11-18 | 2014-11-18 | The analogue experiment installation that coal bed gas horizontal well country rock affects resistivity logging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204344117U true CN204344117U (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420691905.3U Expired - Fee Related CN204344117U (en) | 2014-11-18 | 2014-11-18 | The analogue experiment installation that coal bed gas horizontal well country rock affects resistivity logging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227952A (en) * | 2016-03-25 | 2017-10-03 | 中国石油化工股份有限公司 | A kind of crack induction logging response tank analogue means |
-
2014
- 2014-11-18 CN CN201420691905.3U patent/CN204344117U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227952A (en) * | 2016-03-25 | 2017-10-03 | 中国石油化工股份有限公司 | A kind of crack induction logging response tank analogue means |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 Termination date: 20151118 |
|
| EXPY | Termination of patent right or utility model |