CN112253099A - Orientation centering gamma logging instrument while drilling - Google Patents
Orientation centering gamma logging instrument while drilling Download PDFInfo
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- CN112253099A CN112253099A CN202011166135.7A CN202011166135A CN112253099A CN 112253099 A CN112253099 A CN 112253099A CN 202011166135 A CN202011166135 A CN 202011166135A CN 112253099 A CN112253099 A CN 112253099A
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- gamma
- crystal
- drilling
- azimuth
- pressure
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- 238000005553 drilling Methods 0.000 title claims abstract description 23
- 239000013078 crystal Substances 0.000 claims abstract description 34
- 230000007704 transition Effects 0.000 claims abstract description 14
- 239000006096 absorbing agent Substances 0.000 claims abstract description 13
- 230000035939 shock Effects 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 7
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 229910052793 cadmium Inorganic materials 0.000 claims description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910001026 inconel Inorganic materials 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005251 gamma ray Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- OWUGOENUEKACGV-UHFFFAOYSA-N [Fe].[Ni].[W] Chemical compound [Fe].[Ni].[W] OWUGOENUEKACGV-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000010223 real-time analysis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention discloses a gamma logging instrument with orientation centering while drilling, and belongs to the field of oil and gas drilling. A gamma logging instrument with orientation centering while drilling is characterized in that a centralizer assembly and a transition joint are respectively arranged at two ends of a pressure-bearing shell; a shock absorber component, an orientation characteristic gamma crystal, a circuit framework and an anti-rotation assembly are arranged in the pressure-bearing shell, one end of the shock absorber component is connected with the centralizer component, the other end of the shock absorber component is connected with the orientation characteristic gamma crystal, the other end of the orientation characteristic gamma crystal is connected with the circuit framework, the other end of the circuit framework is connected with the anti-rotation assembly, and the other end of the anti-rotation assembly is connected with the transition joint; the azimuth characteristic gamma crystal consists of a crystal and a columnar lead shielding body positioned on the crystal, wherein the columnar lead shielding body is provided with a windowing angle of 70-180 degrees. The gamma logging instrument can be arranged in drill collar water holes of different specifications in a centering manner and can be matched with drill collars with outer diameters of 3.5in, 4.75in and 6.75 in.
Description
Technical Field
The invention belongs to the field of petroleum and gas drilling, and particularly relates to a gamma logging instrument for orientation centering while drilling.
Background
The azimuth gamma logging while drilling technology can realize real-time judgment of the boundary position of the reservoir where the drill bit is located, timely adjustment of the drilling track, guarantee that the drill bit drills in the reservoir as much as possible, and achieve the purposes of improving the drilling speed, the oil and gas yield and the recovery ratio. The gamma imaging logging while drilling technology adopts a plurality of gamma detectors, aiming at different borehole products, 4.75in, 6.75in, 8.25in and 9.5in instruments (suitable for boreholes with the size of 5.75in or larger) are provided, azimuth gamma data can be detected and transmitted in real time, the measurement result has azimuth characteristics, not only can lithology be identified and conventional parameters such as shale content and the like be calculated, but also imaging processing and real-time analysis can be carried out on the formation gamma data transmitted in real time and detected in azimuth, and the construction of a horizontal well can be guided by combining other data, so that geological guiding can be better carried out.
However, as the difficulty of oil and gas exploration and development in areas with severe environments is increased and the cost is increased, the reconstruction of low-yield wells and old wells becomes more and more important. The slim hole side drilling technology has the advantages of reducing the comprehensive cost of exploration and development, meeting the requirements of exploration and development and being beneficial to protecting the environment, and is suitable for all non-high-yield exploitation wells and exploration areas for old well reconstruction. Because the instrument of slim hole (3.5in) can not adopt the lateral wall installation to realize the azimuth measurement, traditional single gamma crystal detector does not have the azimuth characteristic, consequently is suitable for the directional gamma instrument along with boring of slim hole and awaits developing urgently.
Disclosure of Invention
The invention aims to overcome the defect that an instrument of a slim hole (3.5in) cannot adopt side wall installation to realize azimuth measurement, and provides an azimuth centering while drilling gamma logging instrument.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a gamma logging instrument for centering while drilling azimuth comprises a centralizer assembly, a pressure-bearing shell and a transition joint, wherein the centralizer assembly and the transition joint are respectively arranged at two ends of the pressure-bearing shell;
a shock absorber component, an orientation characteristic gamma crystal, a circuit framework and an anti-rotation assembly are arranged in the pressure-bearing shell, one end of the shock absorber component is connected with the centralizer component, the other end of the shock absorber component is connected with the orientation characteristic gamma crystal, the other end of the orientation characteristic gamma crystal is connected with the circuit framework, the other end of the circuit framework is connected with the anti-rotation assembly, and the other end of the anti-rotation assembly is connected with the transition joint;
the azimuth characteristic gamma crystal consists of a crystal and a columnar lead shielding body positioned on the crystal, wherein the columnar lead shielding body is provided with a windowing angle of 70-180 degrees.
Furthermore, the peripheries of the azimuth characteristic gamma crystal and the circuit framework are provided with sealing rings, and the sealing rings are fixed in the pressure-bearing shell in an extrusion mode.
Further, the preset windowing angle is 73 °.
Further, the preset windowing angle is 90 °.
Furthermore, the transition joint is a flexible connection line and is used for connecting with other instrument centralizer assemblies.
Furthermore, the material of the pressure-bearing shell is titanium steel.
Furthermore, the shielding body is made of tungsten-nickel-iron alloy, lead or cadmium.
Compared with the prior art, the invention has the following beneficial effects:
the gamma logging instrument with the orientation centered while drilling can be centrally installed in drill collar water holes of different specifications and can be matched with drill collars with the outer diameters of 3.5in, 4.75in and 6.75 in; by adding the columnar shielding material with the window to the crystal detector for the traditional centered gamma logging instrument, the natural gamma efficiency of the detector in the windowing direction for measuring the stratum is higher than the shielding direction, and the centered gamma logging-while-drilling instrument has the azimuth characteristic.
Furthermore, when the analysis windowing angle is 73 degrees and 90 degrees, the contribution of the windowing direction to the counting rate is 1.30 times and 1.33 times of the shielding direction, the azimuth resolution respectively reaches 76 degrees and 84 degrees, and the azimuth identification characteristic is basically realized.
Furthermore, when the material of pressure-bearing shell is titanium steel, on the premise of guaranteeing mechanical pressure-bearing, the loss of gamma ray on the pressure-bearing shell can be reduced to the minimum.
Drawings
FIG. 1 is a structural view of the present invention, wherein FIG. 1(a) is an external view and FIG. 1(b) is a sectional view;
FIG. 2 is a schematic diagram of a structure of an azimuthal gamma crystal;
FIG. 3 is a gamma count rate variation relationship of 360 DEG instrument rotation with a window opening angle of 73 deg;
FIG. 4 is a gamma count rate differential geometric factor for a 360 instrument rotation at a window angle of 73;
FIG. 5 is a gamma count rate integral geometric factor for instrument rotation 360 with a window angle of 73;
FIG. 6 is a gamma counting rate variation relationship of an instrument rotating 360 degrees with a window opening angle of 90 degrees;
FIG. 7 shows the gamma counting rate differential geometric factor with a window opening angle of 90 ° and 360 ° rotation of the instrument;
FIG. 8 shows the gamma counting rate integral geometric factor of an instrument rotating 360 degrees with a window opening angle of 90 degrees;
FIG. 9 is a graph showing the effect of pressure-bearing shells of different materials on the count rate of a gamma detector.
Wherein: 1-a centralizer assembly; 2-a damper assembly; 3-a pressure-bearing shell; 4-azimuthal-characteristic gamma crystals; 5-a circuit skeleton; 6-anti-rotation assembly; 7-transition joint.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below 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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, fig. 1(a) and fig. 1(b) are an appearance diagram and a cross-sectional view of a centered gamma logging instrument with azimuth characteristics, respectively, the centered gamma logging instrument with azimuth characteristics of the present invention comprises a centralizer assembly 1, a pressure-bearing housing 3 and a transition joint 7, wherein the centralizer assembly 1 and the transition joint 7 are respectively located at two ends of the pressure-bearing housing 3; a shock absorber component 2, an azimuth characteristic gamma crystal 4, a circuit framework 5 and an anti-rotation assembly 6 are arranged in the pressure-bearing shell 3, one end of the shock absorber component 2 is connected with the centralizer component 1, the other end of the shock absorber component 2 is connected with the azimuth characteristic gamma crystal 4, the other end of the azimuth characteristic gamma crystal 4 is connected with the circuit framework 5, the other end of the circuit framework 5 is connected with the anti-rotation assembly 6, and the other end of the anti-rotation assembly 6 is connected with a transition joint 7; a sealing plug component is arranged in the centralizer component 1; the shock absorber component 2 has axial flexibility, sealing rings are arranged on the peripheries of the azimuth characteristic gamma crystal 4 and the circuit framework 5, and the sealing rings are fixed in the pressure-bearing shell 3 in an extrusion mode; the anti-rotation assembly 6 has expansion characteristics, and locks the circuit framework 5in the pressure-bearing shell 3; the transition joint 7 is a flexible connecting line and has certain flexibility and is used for being connected with other instrument centralizer components.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an orientation characteristic gamma crystal, the orientation characteristic gamma crystal 4 includes a crystal 02 and a shield 01, a windowed cylindrical lead shield is arranged outside the crystal, a windowing angle 03 of the shield is 73 ° or 90 °, and then a simulation test is performed, and a radioactive source is a natural gamma point source.
The orientation centering gamma logging instrument while drilling is arranged in the drill collar in a centering mode and rotates for a circle, the recorded detector counting data are processed as shown in figures 3-8, figures 3 and 6 show the orientation characteristic relation of the counting rate of the instrument after the instrument rotates for a circle, figures 4 and 7 show the contributions to the counting rate at different angles, figures 5 and 8 show the integral of the counting rate at different angles, and it can be seen that when the windowing angle is 73 degrees, the counting rate in the windowing direction is 1.30 times that in the shielding direction, and the orientation resolution of the instrument is 76 degrees; when the windowing angle is 90 degrees, the counting rate in the windowing direction is 1.33 times of that in the shielding direction, and the azimuth resolution of the instrument is 112 degrees. Based on the simulation result, the windowing angle of the azimuth characteristic gamma crystal is set to 73 degrees, and the windowing length is consistent with the crystal length.
The gamma ray receiving test is carried out on the pressure-bearing shells made of different materials, the result is shown in figure 9, the background is the gamma counting of nature received by the test detector when the pressure-bearing shells are not installed, the counting effect of titanium steel is best as can be seen from figure 9, and the loss of the gamma ray can be effectively reduced.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (7)
1. The gamma logging instrument is characterized by comprising a centralizer assembly (1), a pressure-bearing shell (3) and a transition joint (7), wherein the centralizer assembly (1) and the transition joint (7) are respectively arranged at two ends of the pressure-bearing shell (3);
a shock absorber component (2), an azimuth characteristic gamma crystal (4), a circuit framework (5) and an anti-rotation assembly (6) are arranged in the pressure-bearing shell (3), one end of the shock absorber component (2) is connected with the centralizer component (1), the other end of the shock absorber component is connected with the azimuth characteristic gamma crystal (4), the other end of the azimuth characteristic gamma crystal (4) is connected with the circuit framework (5), the other end of the circuit framework (5) is connected with the anti-rotation assembly (6), and the other end of the anti-rotation assembly (6) is connected with a transition joint (7);
the azimuth characteristic gamma crystal (4) consists of a crystal and a columnar lead shielding body positioned on the crystal, and a windowing angle of 70-180 degrees is formed in the columnar lead shielding body.
2. The gamma logging while drilling with azimuth centered according to claim 1, wherein the peripheries of the azimuth characteristic gamma crystal (4) and the circuit framework (5) are provided with sealing rings, and the sealing rings are fixed in the pressure-bearing shell (3) in an extrusion manner.
3. The azimuth centered while drilling gamma logging tool of claim 1, wherein the predetermined windowing angle is 73 °.
4. The azimuth-while-drilling centered gamma logging tool of claim 1, wherein the pre-set windowing angle is 90 °.
5. The while drilling azimuthal centering gamma logging tool as claimed in claim 1, wherein the transition joint (7) is a flexible connection for connection to other tool centralizer assemblies.
6. The gamma logging while drilling with azimuth centered as recited in claim 1, characterized in that the pressure-bearing housing (3) is made of titanium steel.
7. The gamma logging while drilling, azimuthally centered tool of claim 1, wherein the shield is constructed of inconel, lead, or cadmium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011166135.7A CN112253099A (en) | 2020-10-27 | 2020-10-27 | Orientation centering gamma logging instrument while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011166135.7A CN112253099A (en) | 2020-10-27 | 2020-10-27 | Orientation centering gamma logging instrument while drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112253099A true CN112253099A (en) | 2021-01-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011166135.7A Pending CN112253099A (en) | 2020-10-27 | 2020-10-27 | Orientation centering gamma logging instrument while drilling |
Country Status (1)
| Country | Link |
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| CN (1) | CN112253099A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU46590U1 (en) * | 2005-03-09 | 2005-07-10 | Открытое акционерное общество НПФ "Геофизика" | DEVICE FOR STUDYING A CEMENT RING FOR A CASING RING |
| RU2292571C1 (en) * | 2005-08-05 | 2007-01-27 | Общество с ограниченной ответственностью "фирма "НИИД-50" | Comprehensive well instrument |
| CN202441370U (en) * | 2012-02-28 | 2012-09-19 | 北京恒泰万博石油科技有限公司 | Logging while drilling azimuth gamma detection instrument |
| CN203050679U (en) * | 2013-01-20 | 2013-07-10 | 邱世军 | Directivity gamma measuring system |
| CN204920943U (en) * | 2015-09-18 | 2015-12-30 | 中国石油天然气股份有限公司 | Eccentric gamma is surveyed system for two spacing carbon/oxygen log appearance |
| CN205206812U (en) * | 2015-11-02 | 2016-05-04 | 中国船舶重工集团公司第七一八研究所 | High accuracy natural gamma -ray logging appearance of popping one's head in more |
| CN207538829U (en) * | 2017-09-13 | 2018-06-26 | 昆山哈伯希尔能源科技有限公司 | A kind of orientation gamma is imaged logging while drilling apparatus |
| CN209198670U (en) * | 2018-12-14 | 2019-08-02 | 郑州士奇测控技术有限公司 | A kind of directional tool probe type orientation gamma inserting tube |
-
2020
- 2020-10-27 CN CN202011166135.7A patent/CN112253099A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU46590U1 (en) * | 2005-03-09 | 2005-07-10 | Открытое акционерное общество НПФ "Геофизика" | DEVICE FOR STUDYING A CEMENT RING FOR A CASING RING |
| RU2292571C1 (en) * | 2005-08-05 | 2007-01-27 | Общество с ограниченной ответственностью "фирма "НИИД-50" | Comprehensive well instrument |
| CN202441370U (en) * | 2012-02-28 | 2012-09-19 | 北京恒泰万博石油科技有限公司 | Logging while drilling azimuth gamma detection instrument |
| CN203050679U (en) * | 2013-01-20 | 2013-07-10 | 邱世军 | Directivity gamma measuring system |
| CN204920943U (en) * | 2015-09-18 | 2015-12-30 | 中国石油天然气股份有限公司 | Eccentric gamma is surveyed system for two spacing carbon/oxygen log appearance |
| CN205206812U (en) * | 2015-11-02 | 2016-05-04 | 中国船舶重工集团公司第七一八研究所 | High accuracy natural gamma -ray logging appearance of popping one's head in more |
| CN207538829U (en) * | 2017-09-13 | 2018-06-26 | 昆山哈伯希尔能源科技有限公司 | A kind of orientation gamma is imaged logging while drilling apparatus |
| CN209198670U (en) * | 2018-12-14 | 2019-08-02 | 郑州士奇测控技术有限公司 | A kind of directional tool probe type orientation gamma inserting tube |
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