CN109798103B - Natural gamma energy spectrum calibration device while drilling - Google Patents
Natural gamma energy spectrum calibration device while drilling Download PDFInfo
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- CN109798103B CN109798103B CN201910098717.7A CN201910098717A CN109798103B CN 109798103 B CN109798103 B CN 109798103B CN 201910098717 A CN201910098717 A CN 201910098717A CN 109798103 B CN109798103 B CN 109798103B
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Abstract
The invention relates to a calibration device for a natural gamma energy spectrum while drilling. The device for calibrating the natural gamma energy spectrum while drilling comprises a calibration box body, fillers, an element barrel and a cylinder; the element barrel is arranged on the outer side wall of the cylinder, which is positioned at the central position inside the scale box body, and the filler is filled in the gap between the scale box body and the cylinder, inside the scale box body. The invention has the advantages that the invention can be better suitable for a natural gamma energy spectrum instrument while drilling; the non-magnetic steel cylinder structure is adopted, so that the strength is ensured, and the interference of magnetic materials is reduced; the structural form and the formula proportion of the mixed medium in the calibration device are more suitable for a natural gamma energy spectrum instrument while drilling; the shielding body protective material is added, so that the personal health of the operator is protected; the KCl compound is adopted as the gap filler, so that the calibration result of the natural gamma energy spectrum instrument while drilling is positively assisted.
Description
Technical Field
The invention relates to the field of radioactive measurement equipment, in particular to a calibration device for a natural gamma energy spectrum while drilling.
Background
With the continuous increase of highly deviated wells and horizontal wells, the traditional logging method cannot meet the construction requirement, so that the logging-while-drilling technology suitable for the horizontal wells is rapidly developed. The logging while drilling technology is very widely applied abroad, and the research of logging while drilling in China starts relatively late and is seriously lagged behind developed countries. The gamma-ray energy spectrum logging instrument while drilling is mainly used for judging the lithology of strata in the drilling construction of directional wells and horizontal wells, is an essential device in logging-while-drilling series instruments, and has very wide application prospect.
Natural gamma-ray spectral logging is a logging method for recording natural gamma-rays according to different energy ranges. Because most of the gamma rays emitted by the formation are generated by decay of three radioactive isotopes, namely potassium, thorium and uranium, natural gamma-ray spectroscopy logging can give the content of potassium, thorium and uranium in the formation. These data are useful for accurately determining the shale content of the reservoir, analyzing the depositional environment and oil production conditions, and demarcating lithologies. The log of the natural gamma energy spectrum is in units of API.
No matter a traditional cable natural gamma spectrum instrument or a natural gamma spectrum instrument while drilling, accurate natural gamma logging information needs to be obtained, and the natural gamma logging instrument needs to be regularly calibrated in the field logging application process. The calibration is the calibration process of the gamma-ray spectrum logging instrument.
The existing natural gamma energy spectrum calibration device which is commonly used mainly comprises yellow wrapping cloth, a calibration frame, calibration tiles and other equipment. Whether the yellow wrapping cloth, the scale rack or the scale tile is internally provided with a mixed medium, and three radioactive mineral elements of potassium, uranium and thorium are uniformly distributed in the mixed medium. In the calibration verification process, a natural gamma-ray spectroscopy logging-while-drilling instrument is used for measuring the content proportion of three mineral elements, namely potassium, uranium and thorium, in the calibration device, and the content proportion is compared with the standard proportion marked by the graduator, so that the relevant parameters of the instrument are finally determined.
The existing scale device has the following defects:
1. the existing calibration device (yellow wrapping cloth, a calibration frame and calibration tiles) is mainly designed and applied to the traditional cable natural gamma energy spectrum instrument and is not completely suitable for a natural gamma energy spectrum logging-while-drilling instrument.
2. The content of potassium, uranium and thorium elements in the existing calibration device (yellow wrapping cloth, a calibration frame and a calibration tile) is low, the peak values of potassium, uranium and thorium in a curve measured by an instrument in the calibration process are not obvious, and particularly the uranium value is low, so that the calibration effect is influenced;
3. the existing scale devices (yellow cloth, scale frame and scale tile) are generally small and are easily interfered by external environmental factors;
4. the existing scale device (yellow cloth, scale frame and scale tile) has no shielding protection measures, uranium and thorium elements in the scale device belong to radioactive elements, and the scale device has certain harm to operators.
Disclosure of Invention
It is a primary object of embodiments of the present disclosure to provide a calibration apparatus for a natural gamma-ray while drilling, which solves any of the above and other potential problems of the prior art.
In order to achieve the above object, the present embodiment provides a calibration apparatus for a natural gamma-ray spectroscopy while drilling, which includes a calibration box, a filler, an element barrel, and a cylinder;
the element barrel is arranged on the outer side wall of the cylinder, which is positioned at the central position inside the scale box body, and the filler is filled in the gap inside the scale box body between the scale box body and the cylinder.
According to the embodiment of the disclosure, the scale box body comprises an outer container and an inner container, and the outer container and the inner container are both made of 1Cr18Ni9Ti stainless steel with strong corrosion resistance through welding.
According to the embodiment of the disclosure, the calibration device for the natural gamma energy spectrum while drilling further comprises a shielding body, wherein the shielding body is arranged at a gap between an outer container and an inner container of the calibration box body.
According to an embodiment of the present disclosure, the shield has a density value of 11.3g/cm3Lead alloy of (2).
According to the embodiment of the disclosure, the element barrel is formed by uniformly mixing three radioactive elements of potassium, uranium and thorium with rubber and pressing the mixture into the rubber barrel through a die. Wherein the proportion of potassium, uranium and thorium elements is as follows: 1:2:3.
According to the embodiment of the disclosure, the cylinder is made of non-magnetic steel, and the size of the inner hole of the cylinder is larger than the outer diameter of the natural gamma energy spectrum logging-while-drilling instrument.
According to an embodiment of the present disclosure, the filler is a KCl compound.
Another object of the present invention is to provide a method for using the calibration apparatus for a natural gamma-ray spectroscopy while drilling according to the above embodiment, which specifically includes the following steps:
step 1: placing the box type natural gamma energy spectrum calibration device in a spacious place with relatively flat ground, and checking whether the equipment is stable and reliable;
step 2: the method comprises the following steps of carrying a natural gamma-ray spectrum while drilling instrument needing to be calibrated to the position close to a box type natural gamma-ray spectrum calibration device, inserting the instrument into an inner hole of a nonmagnetic steel cylinder, and ensuring that a detector part of the natural gamma-ray spectrum while drilling logging instrument is aligned with an element barrel when the instrument is placed because the element barrel containing three radioactive elements of potassium, uranium and thorium is designed in the middle of the calibration device;
and step 3: whether each index of the electrified tester is normal or not is checked;
and 4, step 4: gradually carrying out data testing according to the calibration requirement of the natural gamma-ray energy spectrum logging instrument while drilling;
and 5, comparing the test result with the standard API value of the box type natural gamma energy spectrum calibration device, and judging whether each index of the instrument meets the well logging construction requirement.
The invention has the beneficial effects that: due to the adoption of the technical scheme, the method has the advantages that the method can be better suitable for a natural gamma energy spectrum instrument while drilling; a non-magnetic steel cylinder structure is adopted, so that the strength is ensured, and the interference of magnetic materials is reduced; the structural form and the formula proportion of the mixed medium in the calibration device are more suitable for a natural gamma energy spectrum instrument while drilling; the shielding body protective material is added, so that the personal health of the operator is protected; repeated experimental research finds that the KCl compound serving as the gap filler positively assists the calibration result of the natural gamma energy spectrum instrument while drilling.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic perspective view of a natural gamma-ray spectroscopy calibration apparatus while drilling according to the present invention.
FIG. 2 is a schematic cross-sectional view of a calibration apparatus for a natural gamma-ray spectroscopy while drilling.
FIG. 3 is a schematic diagram of a calibration apparatus for a natural gamma-ray spectroscopy while drilling according to the present invention.
In the figure:
1. the device comprises a scale box body, a cylinder, a scale box cover, a shield, a filler, an element barrel, a natural gamma energy spectrum instrument while drilling, an outer liner and an inner liner, wherein the scale box body comprises 2 parts of the cylinder, 3 parts of the scale box cover, 4 parts of the shield, 5 parts of the filler, 6 parts of the element barrel, 7 parts of the natural gamma energy spectrum instrument while drilling, 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.
As shown in fig. 1 to 3, the present embodiment provides a calibration apparatus for a natural gamma energy spectrum while drilling, which includes a calibration box, a filler, an element barrel, and a cylinder;
the element barrel is arranged on the outer side wall of the cylinder, which is positioned at the central position inside the scale box body, and the filler is filled in the gap inside the scale box body between the scale box body and the cylinder.
According to this disclosed embodiment, the scale box includes outer courage and inner bag, outer courage and inner bag material all select for use 1Cr18Ni9Ti stainless steel material welding process that the corrosion resistance is strong, the scale box can also set up the scale case lid.
According to the embodiment of the disclosure, the calibration device for the natural gamma energy spectrum while drilling further comprises a shielding body, wherein the shielding body is arranged at a gap between an outer container and an inner container of the calibration box body.
According to an embodiment of the present disclosure, the shield has a density value of 11.3g/cm3Lead alloy of (2).
According to the embodiment of the disclosure, the element barrel is formed by uniformly mixing three radioactive elements of potassium, uranium and thorium with rubber and pressing the mixture into the rubber barrel through a die. Wherein the proportion of potassium, uranium and thorium elements is as follows: 1:2:3.
According to the embodiment of the disclosure, the cylinder is made of non-magnetic steel, and the size of the inner hole of the cylinder is larger than the outer diameter of the natural gamma energy spectrum logging-while-drilling instrument.
According to an embodiment of the present disclosure, the filler is a KCl compound.
According to an embodiment of the present disclosure, the length of the element bucket is less than or equal to 1/2 of the length of the scale box.
A use method of the calibration device for the natural gamma energy spectrum while drilling in the embodiment specifically comprises the following steps:
step 1: placing the box type natural gamma energy spectrum calibration device in a spacious place with relatively flat ground, and checking whether the equipment is stable and reliable;
step 2: the method comprises the following steps of carrying a natural gamma-ray spectrum while drilling instrument needing to be calibrated to the position close to a box type natural gamma-ray spectrum calibration device, inserting the instrument into an inner hole of a nonmagnetic steel cylinder, wherein an element barrel containing three radioactive elements of potassium, uranium and thorium is designed in the middle of the calibration device, so that a detector part of the natural gamma-ray spectrum while drilling logging instrument is aligned to the element barrel when the instrument is placed (as shown in figure 3);
and step 3: whether each index of the electrified tester is normal or not is checked;
and 4, step 4: gradually carrying out data testing according to the calibration requirement of the natural gamma-ray energy spectrum logging instrument while drilling;
and 5, comparing the test result with the standard API value of the box type natural gamma energy spectrum calibration device, and judging whether each index of the instrument meets the well logging construction requirement.
The specific embodiment is as follows:
as shown in figure 1, a rectangular scale box body 1 is designed, and the scale box body 1 can be arranged in other shapes, and can be divided into an outer liner and an inner liner by the scale box body 1. The materials of the inner container and the outer container of the scale box body 1 are all welded by 1Cr18Ni9Ti stainless steel with strong corrosion resistance.
The shield body 4 material is filled between the inner container and the outer container of the scale box body 1, the shield body filled between the inner container and the outer container is a high-density material lead alloy, and the density value of the lead alloy is 11.3g/cm3. The high-density material can effectively shield rays of radioactive elements such as potassium, uranium and thorium, and reduce harm to the environment and operators.
A non-magnetic steel cylinder 2 is fixedly arranged in the middle of the scale box body 1, and the magnetic material has strong detection interference on the natural gamma energy spectrum; the size of the inner hole of the non-magnetic steel cylinder 2 is larger than the outer diameter of the natural gamma-ray spectrum logging instrument while drilling, the natural gamma-ray spectrum logging instrument while drilling is placed in the inner hole of the non-magnetic steel cylinder 2 during calibration, and the position is fixed according to the requirement of the calibration.
4. An element barrel 5 is arranged on the excircle of the non-magnetic steel cylinder 2. The element barrel 5 is formed by uniformly mixing three radioactive elements of potassium, uranium and thorium with special rubber and pressing the mixture into a rubber barrel through a die. Wherein the proportion of potassium, uranium and thorium elements is as follows: 1:2: 3;
5. the residual space in the scale box body 1 is completely filled with a KCl compound 6; the KCl compound is adopted as the gap filler, so that the calibration result of the natural gamma energy spectrum instrument while drilling is positively assisted.
6. The graduated box cover 3 is installed and firmly welded by adopting an argon arc welding technology;
7. finally, API value transmission needs to be carried out through the standard well after the box type natural gamma energy spectrum calibration device is assembled, and the natural gamma energy spectrum logging-while-drilling instrument can be calibrated only through the standard well API value transmission calibration device.
From the above description of the embodiments, it will be clear to those skilled in the art that the present invention may be implemented by other structures, and the features of the present invention are not limited to the above preferred embodiments. Any changes or modifications that can be easily conceived by those skilled in the art are also intended to be covered by the scope of the present invention.
Claims (5)
1. The device for calibrating the natural gamma energy spectrum while drilling is characterized by comprising a calibration box body, fillers, an element barrel and a cylinder;
the element barrel is arranged on the outer side wall of the cylinder, which is positioned at the central position inside the scale box body, and the filler is filled in a gap inside the scale box body between the scale box body and the cylinder;
the scale box body comprises an outer container and an inner container, and the outer container and the inner container are both made of 1Cr18Ni9Ti stainless steel with strong corrosion resistance through welding;
the calibration device for the natural gamma energy spectrum while drilling further comprises a shielding body, wherein the shielding body is arranged in a gap between an outer container and an inner container of the calibration box body;
the element barrel is formed by uniformly mixing three radioactive elements of potassium, uranium and thorium with rubber and pressing the mixture into a rubber barrel through a die; wherein the proportion of potassium, uranium and thorium elements is as follows: 1:2: 3;
the cylinder is made of non-magnetic steel;
the filler is a KCl compound.
2. The calibration apparatus for natural gamma while drilling as recited in claim 1, wherein the shielding body has a density value of 11.3g/cm3Lead alloy of (2).
3. The natural gamma-ray spectroscopy while drilling calibration device as recited in claim 1, wherein the size of the inner bore of the cylinder is larger than the outer diameter of the natural gamma-ray spectroscopy while drilling logging instrument.
4. The natural gamma while drilling spectrum calibration device as recited in claim 1, wherein the length of the element barrel is less than or equal to 1/2 of the length of the calibration box.
5. The method for using the calibration device for the natural gamma-ray while drilling gamma-ray spectroscopy as claimed in claim 1, wherein the method comprises the following steps:
step 1: placing the box type natural gamma energy spectrum calibration device in a spacious place with relatively flat ground, and checking whether the equipment is stable and reliable;
step 2: the method comprises the following steps of carrying a natural gamma-ray spectrum while drilling instrument needing to be calibrated to the position close to a box type natural gamma-ray spectrum calibration device, inserting the instrument into an inner hole of a nonmagnetic steel cylinder, and ensuring that a detector part of the natural gamma-ray spectrum while drilling logging instrument is aligned with an element barrel when the instrument is placed because the element barrel containing three radioactive elements of potassium, uranium and thorium is designed in the middle of the calibration device;
and step 3: whether each index of the electrified tester is normal or not is checked;
and 4, step 4: gradually carrying out data testing according to the calibration requirement of the natural gamma-ray energy spectrum logging instrument while drilling;
and 5: and comparing the test result with the standard API value of the box type natural gamma energy spectrum calibration device, and judging whether each index of the instrument meets the well logging construction requirement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910098717.7A CN109798103B (en) | 2019-01-31 | 2019-01-31 | Natural gamma energy spectrum calibration device while drilling |
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| CN201910098717.7A CN109798103B (en) | 2019-01-31 | 2019-01-31 | Natural gamma energy spectrum calibration device while drilling |
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| CN109798103B true CN109798103B (en) | 2020-07-10 |
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| CN112302641A (en) * | 2020-10-29 | 2021-02-02 | 中国石油天然气集团有限公司 | Well site calibration device of neutron porosity logging while drilling instrument and use method |
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| US5205167A (en) * | 1992-02-26 | 1993-04-27 | Halliburton Logging Services, Inc. | Method and apparatus for locating stratification in production fluid in a well |
| CN1851231A (en) * | 2006-05-24 | 2006-10-25 | 中国石化集团胜利石油管理局钻井工艺研究院 | Movable matural gamma scale well during drilling |
| CN201083837Y (en) * | 2007-08-22 | 2008-07-09 | 杨志高 | Calibrator |
| CN102230376A (en) * | 2011-06-08 | 2011-11-02 | 中天启明石油技术有限公司 | Azimuth gamma well-logging device |
| CN107035358A (en) * | 2017-03-20 | 2017-08-11 | 中国科学院地质与地球物理研究所 | A kind of nearly drill bit gamma Imaging Simulation experimental provision |
| CN207212322U (en) * | 2016-12-17 | 2018-04-10 | 河北亚能油田装备制造有限公司 | It is a kind of to be used to demarcate the gamma graduator with gamma inserting tube is bored |
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- 2019-01-31 CN CN201910098717.7A patent/CN109798103B/en active Active
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| US5205167A (en) * | 1992-02-26 | 1993-04-27 | Halliburton Logging Services, Inc. | Method and apparatus for locating stratification in production fluid in a well |
| CN1851231A (en) * | 2006-05-24 | 2006-10-25 | 中国石化集团胜利石油管理局钻井工艺研究院 | Movable matural gamma scale well during drilling |
| CN201083837Y (en) * | 2007-08-22 | 2008-07-09 | 杨志高 | Calibrator |
| CN102230376A (en) * | 2011-06-08 | 2011-11-02 | 中天启明石油技术有限公司 | Azimuth gamma well-logging device |
| CN207212322U (en) * | 2016-12-17 | 2018-04-10 | 河北亚能油田装备制造有限公司 | It is a kind of to be used to demarcate the gamma graduator with gamma inserting tube is bored |
| CN107035358A (en) * | 2017-03-20 | 2017-08-11 | 中国科学院地质与地球物理研究所 | A kind of nearly drill bit gamma Imaging Simulation experimental provision |
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| 无源放射性密度测量教学实验设计;王新光等;《实验技术与管理》;20170531;第34卷(第5期);第174-177页 * |
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