CN202788822U - Ground graduating device of drill following electromagnetic wave resistivity logger - Google Patents
Ground graduating device of drill following electromagnetic wave resistivity logger Download PDFInfo
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- CN202788822U CN202788822U CN 201220179344 CN201220179344U CN202788822U CN 202788822 U CN202788822 U CN 202788822U CN 201220179344 CN201220179344 CN 201220179344 CN 201220179344 U CN201220179344 U CN 201220179344U CN 202788822 U CN202788822 U CN 202788822U
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Abstract
The utility model discloses a ground graduating device of a drill following electromagnetic wave resistivity logger. The ground graduating device of the drill following electromagnetic wave resistivity logger comprises a base. A cylindrical support outer wall is installed on the base. A circular-tube-shaped support inner wall is vertically installed in the center of the cylindrical support outer wall in a sealing mode. Liquid medium is filled in a ring-shaped interlayer between the cylindrical support outer wall and the circular-tube-shaped support inner wall. An instrument to be graduated is arranged in a circular support tube. A discharging outlet with a valve is arranged on one side of the lower end of the cylindrical support outer wall. According to the ground graduating device of the drill following electromagnetic wave resistivity logger, accuracy of instrument measurement results can be ensured, instrument measurement precision is improved, and then oil field technical staff can be helped to accurately find an oil layer according to measured accurate stratum resistivity information in practical logging and oil saturation of the oil layer can be accurately evaluated. The ground graduating device of the drill following electromagnetic wave resistivity logger is simple in structure and easy to achieve. Due to the fact that the ground graduating device of the drill following electromagnetic wave resistivity logger is completely above the ground and a main body of the ground graduating device of the drill following electromagnetic wave resistivity logger is an integrative structure, the ground graduating device of the drill following electromagnetic wave resistivity logger has the advantages of being movable.
Description
SkillThis area:
The utility model relates in the field of petroleum exploitation with boring the electromagnetic wave logging technology, is specifically related to a kind of surface calibration facility with boring the electromagnetic wave resistivity logging instrument.
Background technology:
In recent years, along with the demand of land horizontal well and the increase of high angle hole drilling effort and offshore drilling, the normal cable well logging can not have been satisfied the needs of logging technique, so logging while drilling technology has obtained very fast development.It can be realized drilling well and log well and carry out simultaneously, it is the position that logger is installed in close drill bit, the stratum be not subject to obviously invading and the condition polluted under measure, and traditional wireline logging compares, and has that real-time is good, the logging accuracy advantages of higher.One of instrument the most frequently used in the well logging during with boring the electromagnetic wave resistivity logging instrument, it mainly measures the resistivity information on stratum, because the resistivity of oil reservoir is higher generally speaking, therefore it can effectively identify oil reservoir, also has the geosteering function that can instruct drill bit horizontal drilling in oil reservoir.As seen, development has very important practical significance with boring the electromagnetic wave resistivity logging instrument, can strengthen the strength of China in the well logging during field, helps the oil field to find more oil and gas reservoir, alleviates petroleum resources situation in short supply.China adopts imitated method mostly in this kind of development instrument, seldom grasp core technology, although can accelerate development speed like this, and be unfavorable for the true development of China's logging technique.In order to grasp core technology, we have developed and have had independent intellectual property right with boring the electromagnetic wave resistivity logging instrument from fundamental research.Before reality, need to carry out scale in instrument application to instrument, make the resistivity response value of instrument in uniform dielectric corresponding with the true resistivity value of medium, to satisfy actual logging requirements.At present domestic there is no carry out the ground-test plant of scale with brill electromagnetic wave resistivity logging instrument.
The utility model content:
The utility model purpose: in instrument application before practical logging, for the resistivity response value of instrument in uniform dielectric equated with the true resistance rate value of medium, error between the response that rectifies an instrument and the calculated value, guarantee that instrument can accurately Formation Resistivity Measurement information, a kind of surface calibration facility with boring the electromagnetic wave resistivity logging instrument is provided, instrument is carried out scale.
The technical solution of the utility model: a kind of surface calibration facility with boring the electromagnetic wave resistivity logging instrument, comprise a pedestal of fitting with ground, vertically be sealed and installed with cylindrical shape at the pedestal upper surface middle part and support outer wall, the center of supporting outer wall in this cylindrical shape vertically is sealed and installed with tubular support inwall, be filled with liquid medium in the annular gap between described cylindrical shape support outer wall and tubular support inwall, in described circular support pipe, the instrument that needs scale be installed.
Lower end one side that supports outer wall in described cylindrical shape is provided with the floss hole with valve.
Described pedestal, cylindrical shape support outer wall and tubular to support the electrical quantity of inwall approaching with air, and relative dielectric constant and is non-conductive and non-magnet material between 1～5.
The radius that described cylindrical shape supports outer wall is more than the 2.5m.
The height that described cylindrical shape supports outer wall is more than the 6.5m.
Described pedestal its thickness in the situation that guarantees engineering strength is below the 0.3m.
The resistivity of described pedestal is more than or equal to 100Ohmm.
The thickness that described cylindrical shape supports outer wall is more than the 0.3m.
The resistivity that described cylindrical shape supports outer wall is 10
3More than the Ohmm.
The diameter that described tubular supports inwall is less than or equal to 0.2m greater than the external diameter of need scale instrument.
Beneficial effect: 1, the utility model has been realized the scale with brill electromagnetic wave resistivity logging instrument, after this device carries out scale, can guarantee apparatus measures result's accuracy, and the certainty of measurement of raising instrument, and then in practical logging, utilize the accurately formation resistivity information of measuring to help the oilfield technology personnel to find accurately oil reservoir, estimate accurately the oil saturation of oil reservoir.
2, the utility model apparatus structure is simple, realize easily, and the principle process of scale also is easily understood, and be a kind of very practical graduation apparatus.Because it is fully on ground, and main body is integrated structure, has transportable advantage.
Description of drawings
Fig. 1 is the cross-sectional view of surface calibration facility of the present utility model;
Fig. 2 is the top view of Fig. 1;
Fig. 3 is that apparent resistivity supports the outer wall change curve with cylindrical shape;
Fig. 4 is that instrument is at graduation apparatus different depth place apparent resistivity value curve.
Among the figure: 1 for needing the installation inner chamber of scale instrument, and 2 for tubular supports inwall, and 3 is liquid medium, and 4 for cylindrical shape supports outer wall, and 5 is pedestal, and 6 are the floss hole with valve, and 7 is ground.
The specific embodiment
Embodiment one: referring to Fig. 1 and Fig. 2, a kind of surface calibration facility with boring the electromagnetic wave resistivity logging instrument comprises that pedestal 5, cylindrical shape support outer wall 4 and tubular supports inwall 2.Pedestal 5 is circular, and upper and lower surface is the plane, is used for supporting the device above it, have its soffit of enough intensity to fit and be fixed in ground.Upper surface middle part at pedestal 5 vertically is sealed and installed with cylindrical shape support outer wall 4, and the center of supporting outer wall 4 in this cylindrical shape vertically is sealed and installed with tubular support inwall 2.Described round base 5, cylindrical shape support outer wall 4 and tubular supports inwall 2 concentrics.Supporting outer wall 4 and tubular in described cylindrical shape and support in the annular gap between the inwall 2 and be filled with liquid medium 3, is with instrument and medium isolation in the effect of described tubular supporting walls 2, requires under the prerequisite of its intensity of consideration thin as much as possible.The inner chamber of circular support pipe is that the instrument that needs scale is installed in the inner chamber 1, and its bottom seals.Lower end one side that simultaneously supports outer wall in described cylindrical shape is provided with the floss hole with valve.
Operation instruction:
When instrument is carried out scale, the liquid medium 3 of given electrical quantity is riddled between tubular support inwall 2 and the cylindrical shape support outer wall 4, then instrument is transferred in the inner chamber 1, at first calculate the theoretical response value of instrument by theory, compare with the response of actual measurement, be worth unanimously such as both, and substantially equal the response of instrument in uniform dielectric and then finish a scale value, change afterwards different medium (as by in liquid, adding salinity in various degree), process above repeating, the scale before finishing instrument and dispatching from the factory.During to different instrument calibration, by floss hole the rear new medium of changing of liquid medium discharging is got final product.
Material requirements:
Except liquid medium 3, all the other media all require electrical quantity and air to approach in the whole device, and relative dielectric constant can not conduct electricity and magnetic conduction, for example glass-reinforced plastic material between 1～5.And in the scale process, except the instrument that needs scale, can not there be any metal to exist.
The selection of dimension principle:
Electrical quantity with the spacing of the operating frequency of the investigation depth of boring electromagnetic wave resistivity instrument and instrument, dual-mode antenna and measuring media is relevant, therefore, will be according to the physical dimension of want scale instrument, the frequency of work, choose the size of each part in suitable liquid medium 3 and the whole device, make whole size satisfy the requirement of strength of engineering and guarantee that the response of instrument mainly is the impact of liquid body medium 3, drop to the impact that is subjected to the outer medium of device and the earth minimum.
Selection of dimension:
1, the radial dimension of cylindrical shape support outer wall 4 is chosen
Choosing with the frequency of boring electromagnetic wave resistivity instrument is 2MHz and 400KHz, and spacing is 20in, 30in, 46in.Measure phase difference apparent resistivity and Amplitude Ratio apparent resistivity under the combination of each frequency and spacing, so always have 12 measured values.Suppose device is enough high, be not subjected to the impact of top air and following the earth, only consider radially stratification this moment, it is 0.2m that given cylindrical shape supports inner diameter, the water resistance rate is 10Ohmm in the device, allow the experimental rig radius change from small to large, and calculate the situation that apparent resistivity value changes by theory, the results are shown in Figure 3.Green Function Method in the radial stratified media that theoretical calculation method adopts.The method adopts recursive matrix method to calculate.According to cylindrical layer at the interface the condition of continuity of Electric and magnetic fields obtain determining the matrix equation group of undetermined coefficient and by the recurrence method rapid solving.Only need to change the position of source item element in the equation group, just can obtain easily when source point and the some Green function during at random layer, form succinctly, be easy to programme.
Also calculated in addition the change in apparent resistivity curve when the water resistance rate is for other values in the device.Find after the analysis-by-synthesis that radius is larger, the lower ectocine that is subjected to of resistivity is less, but consider the Practical Project situation, the radius that is bound to is the smaller the better.Therefore, compromise is considered, is guaranteeing that the apparent resistivity value that resistivity records when 10Ohmm is following is subjected in the less situation of ectocine, and the radius that the suggestion cylindrical shape supports outer wall 4 is 2.5m.
2, the height dimension of cylindrical shape support outer wall 4 is chosen
Owing to get in the 2.5m situation at radius, the water resistance rate only when 10Ohmm is following instrument response be subjected to ectocine less, therefore, the impact of the lower outside bound pair instrument response of differing heights when considering water resistance rate 10Ohmm.Suppose that instrument is not subjected to ectocine diametrically this moment, only consider upper lower leaf, adopt the green function method computing equipment survey mark in vertical stratified medium to be subjected to the external influence situation at graduation apparatus mid point vicinity apparent resistivity value with the device height change, this kind method adopts recursive algorithm to calculate the Dyadic Green's Function of random layer medium.Obtain the system of linear equations of three definite Sommerfeld integration undetermined coefficients according to the condition of continuity of place, bed boundary Electric and magnetic fields, correspond respectively to the TM ripple of vertical unit electric dipole generation, TE ripple and the TM ripple that horizontal direction unit's electric dipole produces, these equation group all can be found the solution by recursive algorithm.Only need to change the position of source item element in three systems of linear equations, just can obtain easily the Dyadic Green's Function when source point and field are put at random layer.Result of calculation as shown in Figure 4, highly be 6.5m, the apparent resistivity of mid point 3.25m depth and actual value error are also little, in the acceptable scope, and the length of considering this instrument is 6.34 meters, therefore 6.5m can just put into well fully with instrument, to sum up considers, the suggestion cylindrical shape supports the height of outer wall 4 and elects 6.5m as.
3, the size of pedestal 5 and resistivity are chosen
When the water resistance rate is 10Ohmm in device, suppose that still device directly upwards is not subjected to ectocine, only consider upper lower leaf, pedestal 5 thickness are increased to 0.5m from 0.3m, utilize vertical stratified medium Green Function Method to calculate, found that, apparent resistivity value and true value error increase, and will guarantee engineering strength, and then thickness again can not be too thin, so suggest thickness is 0.3m, when numerical simulation, thickness is made as 0.3m, pedestal 5 resistivity are changed to 100000 Ohmm from 100Ohmm, observe and find that curvilinear motion is very little, namely the resistivity requirement to pedestal pedestal 5 is not very strict in Practical Project, gets final product greater than 100Ohmm.
4, thickness and the resistivity of cylindrical shape support outer wall 4 are chosen
Support outer wall 4 high 6.5m in cylindrical shape, during radius 2.5m, resistivity is made as 10
5Ohmm supports outer wall 4 thickness with cylindrical shape and changes to the 0.5m discovery to not impact of apparent resistivity value from 0.3m, and cylindrical shape is supported the resistivity of outer wall 4 by 10
5Ohmm is reduced to 10
3Behind the Ohmm, very little on the measurement result impact, can ignore.So selecting cylindrical shape to support outer wall 4 thickness is 0.3m, wall resistivity is 10
5Ohmm can suitably choose thickness according to requirement of strength on Practical Project, can't the logarithm value analog result exert an influence.
5, the selection of dimension of tubular inwall
By above selected moulded dimension, when the water resistance rate is 10Ohmm, the diameter of tubular inwall 2 is increased to 0.3m from 0.2m, discovery has less impact to instrument response, response error is had increased slightly, further increase when increasing to the 0.4m time error, but general impacts not very large.The size that tubular inwall 2 is dwindled in suggestion as far as possible considers that the instrument diameter is 7in, so advise the size of tubular inwall 2 is decided to be diameter 0.2m, thickness is thin as much as possible in the guaranteed strength situation.
Claims (10)
1. one kind with the surface calibration facility that bores the electromagnetic wave resistivity logging instrument, it is characterized in that: comprise a pedestal of fitting with ground, vertically be sealed and installed with cylindrical shape at the pedestal upper surface middle part and support outer wall, the center of supporting outer wall in this cylindrical shape vertically is sealed and installed with tubular support inwall, be filled with liquid medium in the annular gap between described cylindrical shape support outer wall and tubular support inwall, in described circular support pipe, the instrument that needs scale be installed.
2. the surface calibration facility with boring the electromagnetic wave resistivity logging instrument according to claim 1 is characterized in that: lower end one side that supports outer wall in described cylindrical shape is provided with the floss hole with valve.
3. the surface calibration facility with boring the electromagnetic wave resistivity logging instrument according to claim 1, it is characterized in that: electrical quantity and air that described pedestal, cylindrical shape support outer wall and tubular support inwall approach, relative dielectric constant and is non-conductive and non-magnet material between 1～5.
4. the surface calibration facility with boring the electromagnetic wave resistivity logging instrument according to claim 1, it is characterized in that: the radius that described cylindrical shape supports outer wall is more than the 2.5m.
5. the surface calibration facility with boring the electromagnetic wave resistivity logging instrument according to claim 1, it is characterized in that: the height that described cylindrical shape supports outer wall is more than the 6.5m.
6. the surface calibration facility with boring the electromagnetic wave resistivity logging instrument according to claim 1, it is characterized in that: described pedestal its thickness in the situation that guarantees engineering strength is below the 0.3m.
7. the surface calibration facility with boring the electromagnetic wave resistivity logging instrument according to claim 1, it is characterized in that: the resistivity of described pedestal is more than or equal to 100Ohmm.
8. the surface calibration facility with boring the electromagnetic wave resistivity logging instrument according to claim 1, it is characterized in that: the thickness that described cylindrical shape supports outer wall is more than the 0.3m.
9. the surface calibration facility with boring the electromagnetic wave resistivity logging instrument according to claim 1, it is characterized in that: the resistivity that described cylindrical shape supports outer wall is 10
3More than the Ohmm.
10. the surface calibration facility with boring the electromagnetic wave resistivity logging instrument according to claim 1, it is characterized in that: the diameter that described tubular supports inwall is less than or equal to 0.2m greater than the external diameter of need scale instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220179344 CN202788822U (en) | 2012-04-25 | 2012-04-25 | Ground graduating device of drill following electromagnetic wave resistivity logger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220179344 CN202788822U (en) | 2012-04-25 | 2012-04-25 | Ground graduating device of drill following electromagnetic wave resistivity logger |
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| Publication Number | Publication Date |
|---|---|
| CN202788822U true CN202788822U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220179344 Expired - Fee Related CN202788822U (en) | 2012-04-25 | 2012-04-25 | Ground graduating device of drill following electromagnetic wave resistivity logger |
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|---|---|
| CN (1) | CN202788822U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619505A (en) * | 2012-04-25 | 2012-08-01 | 中国电子科技集团公司第二十二研究所 | Ground calibration device of instrument for electromagnetic resistivity logging while drilling |
| CN109577965A (en) * | 2018-11-20 | 2019-04-05 | 中国石油天然气集团有限公司 | A kind of segmentation scale method of borehole wall micro-resisitivity image instrument |
-
2012
- 2012-04-25 CN CN 201220179344 patent/CN202788822U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619505A (en) * | 2012-04-25 | 2012-08-01 | 中国电子科技集团公司第二十二研究所 | Ground calibration device of instrument for electromagnetic resistivity logging while drilling |
| CN109577965A (en) * | 2018-11-20 | 2019-04-05 | 中国石油天然气集团有限公司 | A kind of segmentation scale method of borehole wall micro-resisitivity image instrument |
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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: 20130313 Termination date: 20210425 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |