CN110952979A - Casing damage well magnetic leakage finding method - Google Patents
Casing damage well magnetic leakage finding method Download PDFInfo
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- CN110952979A CN110952979A CN202010016951.3A CN202010016951A CN110952979A CN 110952979 A CN110952979 A CN 110952979A CN 202010016951 A CN202010016951 A CN 202010016951A CN 110952979 A CN110952979 A CN 110952979A
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- magnetic
- shaft
- magnetic leakage
- leakage finding
- casing damage
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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
- E21B47/10—Locating fluid leaks, intrusions or movements
Abstract
The invention belongs to the technical field of oil and gas field production and development, and particularly relates to a casing damage well magnetic leakage finding method. Compared with the existing casing damage well leakage finding technology, the method simplifies the operation process, has high positioning precision, and can quickly judge the casing damage section. The invention reduces the leakage finding cost of the casing damage well. In actual use, the method is simple in construction, leakage of the whole well body can be found through one-time construction because the magnetic leakage finding liquid has a pressure regulating function, and leakage finding of the double packer often needs multiple construction operations due to damage of the sealing rubber, visual leakage finding needs to be combined with effluent flow judgment, and whether the double packer is broken or not cannot be accurately judged.
Description
Technical Field
The invention belongs to the technical field of oil and gas field production and development, and particularly relates to a casing damage well magnetic leakage finding method.
Background
In the development of oil fields, casing perforation often occurs due to measures such as acidification and fracturing and casing corrosion, and once the casing perforation needs to be treated, leakage of the casing must be found before treatment.
The current commonly used casing damage well leakage detection method comprises MIT + MTT well logging, double-sealing leakage detection and lead model detection for casing damage well detection (application number 201220093937.4). MIT + MTT well logging is looked for neglected loading precision not high, and the accuracy needs to improve, and double seal is looked for neglected loading because of using two packer clamps to seal, consequently is looked for neglected loading many times and has packer inefficacy influence detection effect, and the patent "the cover decreases the lead mould that well detection used" well logging is that the process is complicated, and the precision is limited.
Therefore, a magnetic leakage finding method for the leakage casing loss well is researched, and the casing loss well can be conveniently, quickly and accurately detected.
Disclosure of Invention
The invention provides a magnetic leakage finding method for a casing loss well, and aims to provide a leakage finding method capable of quickly judging a casing loss section.
In order to achieve the purpose, the invention adopts the technical scheme that:
a magnetic leakage finding method for casing damage well is characterized by pumping magnetic leakage finding liquid into a shaft by using a pump truck, flushing the shaft after the magnetic leakage finding liquid is filled in the shaft, and putting a magnetic detection device into the shaft, wherein the shaft section with magnetism larger than that of other shaft sections is a casing damage section.
The magnetic leakage finding method for the casing damage well comprises the following specific implementation steps:
firstly, a shaft is washed through, and a bridge plug is arranged above a perforation section of the shaft;
secondly, injecting the magnetic leakage finding liquid into a shaft through a pump truck, and extruding the magnetic leakage finding liquid into a stratum through a damaged section of the shaft;
thirdly, the shaft is washed, and the magnetic leakage finding liquid in the shaft is cleaned;
fourthly, a magnetic detection device is put into the shaft;
fifthly, judging that a casing damage point exists in the section when the magnetic field intensity detected in the process of descending the magnetic detection device is larger than the magnetic field intensity of other sections;
and sixthly, judging the water absorption capacity of the casing damage section through the casing damage point in the fifth step.
The magnetic leakage finding liquid is prepared by mixing the following components in percentage by mass: 1 to 5 percent of polyacrylamide, 3 to 5 percent of nano magnetic particles and the balance of water.
The nano magnetic particles are Fe with magnetism2O3Nanoparticles (particle size 40-150 μm).
The magnetic leakage finding liquid is prepared by mixing the following components in percentage by mass: 1-5% of polyacrylamide, 1-5% of guanidine gum, 1-5% of EMC tackifier and 3-5% of 40-150 mu m Fe2O3、The balance being water.
The viscosity of the magnetic leakage detection liquid is 300-500 mPas.
The magnetic leakage finding liquid is injected at a constant speed when being injected into the shaft through the pump truck, the injection speed is not more than 300L/min, and the injection pressure is not more than the formation fracture pressure.
Compared with the prior art, the invention has the following advantages:
1. compared with the existing casing damage well leakage finding technology, the method simplifies the operation process, has high positioning precision, and can quickly judge the casing damage section.
2. The invention reduces the leakage finding cost of the casing damage well.
3. In actual use, the method is simple in construction, leakage of the whole well body can be found through one-time construction because the magnetic leakage finding liquid has a pressure regulating function, and leakage finding of the double packer often needs multiple construction operations due to damage of the sealing rubber, visual leakage finding needs to be combined with effluent flow judgment, and whether the double packer is broken or not cannot be accurately judged.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to clearly understand the technical solutions of the present invention and to implement the technical solutions according to the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described 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 structural view of the present invention;
in the figure: 1-a wellbore; 2-a magnetic detection device; 3-magnetic leakage finding; 4-formation; 5-bridge plug.
Detailed Description
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.
The first embodiment is as follows:
according to the magnetic leakage finding method for the casing damage well, as shown in the figure 1, a pump truck is used for pumping magnetic leakage finding liquid 3 into a shaft 1, after the shaft 1 is filled with the magnetic leakage finding liquid 3, the well is washed, then a magnetic detection device 2 is put into the well, and the well section with the magnetism larger than that of other well sections is a casing damage section.
The magnetic leakage finding liquid 3 is prepared by mixing the following components in percentage by mass: 1 to 5 percent of polyacrylamide, 3 to 5 percent of nano magnetic particles and the balance of water.
The nano magnetic particles are magnetic Fe2O3 nano particles, and the particle size is 40-150 mu m.
The magnetic leakage finding liquid 4 is prepared by mixing the following components in percentage by mass: 1-5% of polyacrylamide, 1-5% of guanidine gum, 1-5% of EMC tackifier, 3-5% of 40-150 mu m Fe2O3 and the balance of water.
The viscosity of the magnetic leakage finding liquid 4 is 300-500 mPas.
The magnetic leakage finding liquid 4 is injected at a constant speed when being injected into the shaft 1 through a pump truck, the injection speed is not more than 300L/min, and the injection pressure is not more than the fracture pressure of the stratum 5.
In actual use:
the detection sensitivity of the magnetic detection device 2 is above 0.1Gs, the casing damage point is determined through the magnetic change of the shaft 1, and the water absorption capacity of the casing damage section is qualitatively judged through the strength of magnetism.
And (3) putting the magnetic detection device 2, and performing magnetic detection on the shaft 1, wherein the magnetic field intensity at 800m and 1000m is suddenly enhanced to be 1.2Gs and 1.5Gs, and the magnetic field intensity of other sections is 0.5-0.6Gs, so that sleeve damage points at 800m and 1000m are determined, and the water absorption capacity of the sleeve damage section at 1000m is qualitatively judged to be stronger than that at 800 m.
And (2) putting a magnetic detection device 2, performing magnetic detection on the shaft 1, wherein the magnetic field intensity of 1000m and 1200m is suddenly enhanced to be 1.5Gs and 1.1Gs, and the magnetic field intensity of other sections is 0.5-0.6Gs, so that the sleeve damage points at 1000m and 12500 m are determined, and the water absorption capacity of the sleeve damage section at 1000m is qualitatively judged to be stronger than that at 1200 m.
And (2) putting a magnetic detection device 2, and through the magnetic detection of the shaft 1 and the magnetic detection of the shaft 1, the magnetism at 1000m and 1500m is suddenly enhanced to be 1.5Gs and 1.3Gs, and the magnetic field intensity of other sections is 0.5-0.6Gs, so that the sleeve damage points at 1000m and 1500m are determined, and the water absorption capacity of the sleeve damage section at 1000m is qualitatively judged to be stronger than that at 1500 m.
In this embodiment, the magnetic detection device may be a magnetic field detector capable of detecting the degree of advance of the magnetic field, for example, a magnetic field detector of 3470 type.
Example two:
according to the magnetic leakage finding method for the casing damage well shown in the figure 1, the specific implementation steps are as follows:
firstly, a shaft 1 is washed through, and a bridge plug 5 is arranged above a perforation section of the shaft 1;
secondly, injecting the magnetic leakage finding liquid 3 into the shaft 1 through a pump truck, and extruding the magnetic leakage finding liquid 3 into the stratum 4 through a damaged section of the shaft 1;
thirdly, the shaft 1 is washed, and the magnetic leakage finding liquid 3 in the shaft is cleaned;
fourthly, a magnetic detection device 2 is put into the shaft 1;
fifthly, judging that a sleeve damage point exists in the section when the magnetic field intensity detected in the process of descending the magnetic detection device 2 is greater than that of other sections;
and sixthly, judging the water absorption capacity of the casing damage section through the casing damage point in the fifth step.
The magnetic leakage finding liquid 3 is prepared by mixing the following components in percentage by mass: 1 to 5 percent of polyacrylamide, 3 to 5 percent of nano magnetic particles and the balance of water.
The nano magnetic particles are magnetic Fe2O3 nano particles, and the particle size is 40-150 mu m.
The magnetic leakage finding liquid 3 is prepared by mixing the following components in percentage by mass: 1-5% of polyacrylamide, 1-5% of guanidine gum, 1-5% of EMC tackifier, 3-5% of 40-150 mu m Fe2O3 and the balance of water.
The viscosity of the magnetic leakage finding liquid 3 is 300-500 mPas.
The magnetic leakage finding liquid 3 is injected at a constant speed when being injected into the shaft 1 through a pump truck, the injection speed is not more than 300L/min, and the injection pressure is not more than the fracture pressure of the stratum 4.
In actual use:
the detection sensitivity of the magnetic detection device 2 is above 0.1Gs, the casing damage point is determined through the magnetic change of the shaft 1, and the water absorption capacity of the casing damage section is qualitatively judged through the strength of magnetism.
And (3) putting the magnetic detection device 2, and performing magnetic detection on the shaft 1, wherein the magnetic field intensity at 800m and 1000m is suddenly enhanced to be 1.2Gs and 1.5Gs, and the magnetic field intensity of other sections is 0.5-0.6Gs, so that sleeve damage points at 800m and 1000m are determined, and the water absorption capacity of the sleeve damage section at 1000m is qualitatively judged to be stronger than that at 800 m.
And (2) putting a magnetic detection device 2, performing magnetic detection on the shaft 1, wherein the magnetic field intensity of 1000m and 1200m is suddenly enhanced to be 1.5Gs and 1.1Gs, and the magnetic field intensity of other sections is 0.5-0.6Gs, so that the sleeve damage points at 1000m and 12500 m are determined, and the water absorption capacity of the sleeve damage section at 1000m is qualitatively judged to be stronger than that at 1200 m.
And (2) putting a magnetic detection device 2, and through the magnetic detection of the shaft 1 and the magnetic detection of the shaft 1, the magnetism at 1000m and 1500m is suddenly enhanced to be 1.5Gs and 1.3Gs, and the magnetic field intensity of other sections is 0.5-0.6Gs, so that the sleeve damage points at 1000m and 1500m are determined, and the water absorption capacity of the sleeve damage section at 1000m is qualitatively judged to be stronger than that at 1500 m.
In this embodiment, the magnetic detection device may be a magnetic field detector capable of detecting the degree of advance of the magnetic field, for example, a magnetic field detector of 3470 type.
Example three:
essentially the same as example 2, except that: the magnetic leakage finding liquid is prepared by mixing the following components in percentage by mass: 1 to 5 percent of polyacrylamide, 3 to 5 percent of nano magnetic particles and the balance of water
The nano magnetic particles are magnetic Fe2O3 nano particles, and the particle size is 40-150 mu m.
Example four:
essentially the same as example 2, except that: the magnetic leakage finding liquid is prepared by mixing the following components in percentage by mass: 1-5% of polyacrylamide, 1-5% of guanidine gum, 1-5% of EMC tackifier, 3-5% of 40-150 mu m Fe2O3 and the balance of water
Example five:
essentially the same as example 2, except that: the viscosity of the magnetic leakage detection liquid is 300-500 mPas.
The magnetic leakage finding liquid is injected at a constant speed when being injected into the shaft through the pump truck, the injection speed is not more than 300L/min, and the injection pressure is not more than the formation fracture pressure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention. The components and structures and processes not described in detail in this embodiment are well known in the art, and need not be described in detail herein.
Claims (7)
1. A casing damage well magnetic leakage finding method is characterized in that: and pumping the magnetic leakage finding liquid into the shaft by using a pump truck, flushing the shaft after the magnetic leakage finding liquid is filled in the shaft, and putting a magnetic detection device into the shaft, wherein the shaft section with magnetism larger than that of other shaft sections is a casing damage section.
2. The casing damage well magnetic leakage finding method according to claim 1, characterized by comprising the following steps:
firstly, a shaft is washed through, and a bridge plug is arranged above a perforation section of the shaft;
secondly, injecting the magnetic leakage finding liquid into a shaft through a pump truck, and extruding the magnetic leakage finding liquid into a stratum through a damaged section of the shaft;
thirdly, the shaft is washed, and the magnetic leakage finding liquid in the shaft is cleaned;
fourthly, a magnetic detection device is put into the shaft;
fifthly, judging that a casing damage point exists in the section when the magnetic field intensity detected in the process of descending the magnetic detection device is larger than the magnetic field intensity of other sections;
and sixthly, judging the water absorption capacity of the casing damage section through the casing damage point in the fifth step.
3. The casing damage well magnetic leakage finding method according to claim 1 or 2, characterized in that the magnetic leakage finding liquid is formed by mixing the following components in percentage by mass: 1 to 5 percent of polyacrylamide, 3 to 5 percent of nano magnetic particles and the balance of water.
4. The method of claim 3, wherein the nano-magnetic particles are Fe with magnetic property2O3And (4) nano particles with the particle size of 40-150 mu m.
5. The casing damage well magnetic leakage finding method according to claim 1 or 2, characterized in that the magnetic leakage finding liquid is formed by mixing the following components in percentage by mass: 1-5% of polyacrylamide, 1-5% of guanidine gum, 1-5% of EMC tackifier and 3-5% of 40-150 mu m Fe2O3、The balance being water.
6. The method for magnetic leakage detection of casing damage well as claimed in claim 1 or 2, wherein the viscosity of the magnetic leakage detection liquid is 300-500 mPa-s.
7. The casing damage well magnetic leakage finding method according to claim 1 or 2, characterized in that the magnetic leakage finding liquid is injected into the well bore at a constant speed through a pump truck, the injection speed is not more than 300L/min, and the injection pressure is not more than the formation fracture pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010016951.3A CN110952979A (en) | 2020-01-08 | 2020-01-08 | Casing damage well magnetic leakage finding method |
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| CN202010016951.3A CN110952979A (en) | 2020-01-08 | 2020-01-08 | Casing damage well magnetic leakage finding method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483069A (en) * | 2020-11-09 | 2021-03-12 | 中国石油天然气股份有限公司 | Combined casing damage detection tool and detection method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090179649A1 (en) * | 2008-01-08 | 2009-07-16 | Schmidt Howard K | Methods for magnetic imaging of geological structures |
| CN101737033A (en) * | 2008-11-24 | 2010-06-16 | 普拉德研究及开发股份有限公司 | Instrumented formation tester for injecting and monitoring of fluids |
| CN104481516A (en) * | 2014-11-26 | 2015-04-01 | 杭州泛太石油设备科技有限公司 | Continuous tracer logging method and logger thereof |
| CN106014330A (en) * | 2016-06-27 | 2016-10-12 | 中国石油天然气股份有限公司 | Method for increasing success rate of chemical plugging of leaking casing damage well |
| CN106246166A (en) * | 2016-08-11 | 2016-12-21 | 中国石油天然气股份有限公司 | A kind of leakage of injecting loses method of testing |
| CN106574496A (en) * | 2014-06-23 | 2017-04-19 | 查尔斯斯塔克德雷珀实验室有限公司 | Injection well identification using tracer particles |
| CN106677767A (en) * | 2016-12-12 | 2017-05-17 | 中国石油大学(华东) | Casing leakage point depth detecting method and device for oil extraction well |
| CN109339769A (en) * | 2018-11-26 | 2019-02-15 | 中海石油(中国)有限公司 | A kind of integrated form down-hole oil tube leakage ground detection system |
| CN110454132A (en) * | 2018-05-08 | 2019-11-15 | 中国石油大学(华东) | A kind of compact reservoir nanometer magnetofluid fracturing fluid imbibition increases oily method and modified nanometer magnetic particle |
-
2020
- 2020-01-08 CN CN202010016951.3A patent/CN110952979A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090179649A1 (en) * | 2008-01-08 | 2009-07-16 | Schmidt Howard K | Methods for magnetic imaging of geological structures |
| CN101737033A (en) * | 2008-11-24 | 2010-06-16 | 普拉德研究及开发股份有限公司 | Instrumented formation tester for injecting and monitoring of fluids |
| CN106574496A (en) * | 2014-06-23 | 2017-04-19 | 查尔斯斯塔克德雷珀实验室有限公司 | Injection well identification using tracer particles |
| CN104481516A (en) * | 2014-11-26 | 2015-04-01 | 杭州泛太石油设备科技有限公司 | Continuous tracer logging method and logger thereof |
| CN106014330A (en) * | 2016-06-27 | 2016-10-12 | 中国石油天然气股份有限公司 | Method for increasing success rate of chemical plugging of leaking casing damage well |
| CN106246166A (en) * | 2016-08-11 | 2016-12-21 | 中国石油天然气股份有限公司 | A kind of leakage of injecting loses method of testing |
| CN106677767A (en) * | 2016-12-12 | 2017-05-17 | 中国石油大学(华东) | Casing leakage point depth detecting method and device for oil extraction well |
| CN110454132A (en) * | 2018-05-08 | 2019-11-15 | 中国石油大学(华东) | A kind of compact reservoir nanometer magnetofluid fracturing fluid imbibition increases oily method and modified nanometer magnetic particle |
| CN109339769A (en) * | 2018-11-26 | 2019-02-15 | 中海石油(中国)有限公司 | A kind of integrated form down-hole oil tube leakage ground detection system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483069A (en) * | 2020-11-09 | 2021-03-12 | 中国石油天然气股份有限公司 | Combined casing damage detection tool and detection method |
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