CN106639941A - Gel injection type core protection method - Google Patents
Gel injection type core protection method Download PDFInfo
- Publication number
- CN106639941A CN106639941A CN201510716274.5A CN201510716274A CN106639941A CN 106639941 A CN106639941 A CN 106639941A CN 201510716274 A CN201510716274 A CN 201510716274A CN 106639941 A CN106639941 A CN 106639941A
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- China
- Prior art keywords
- cylinder
- core
- gel
- rock core
- conformal
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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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
Abstract
The invention relates to a gel injection type core protection method. According to the technical scheme, an aluminum alloy conformal cylinder along with a core in the cylinder is drawn out from a core taking cylinder, the aluminum alloy conformal cylinder along with the core in the cylinder is cut into short cylinders, one end of each short cylinder is sealed with a plastic cover and a hoop, the short cylinder is kept erect to make the core be in the center, as to the other end, mixed gel is injected into an annular gap of the core and the aluminum alloy conformal cylinder using a gel injection spray gun of a special gel injection machine, the gel is made to wait to be solidified after the gel is filled, the core is solidified in the aluminum alloy conformal cylinder then, and the other end of the short cylinder is sealed with the plastic cover and the hoop. The gel injection type core protection method has the advantages that according to the outlet cylinder core, a non-invasive gel body is adopted, and core later experiments are not affected; manual operation strength is reduced; the method is superior, efficient and practical, and the accuracy of later laboratory measurement geological parameter is guaranteed.
Description
Art
It is a kind of rock core post-processing technology that formation core obtained to drilling and coring delivery is protected the present invention relates to oil and gas well drilling field of operation, can apply to all kinds of drilling and coring deliveries, belongs to drilling and coring delivery supporting technology.
Background technology
Special coring tool is got subsurface rock in bulk on ground used in drilling process, and this process is referred to as drilling and coring delivery.Lithology, porosity, permeability, the saturability of rock can be determined by rock core, the physicochemical properties such as wettability and electric conductivity, intuitively Study of The Underground construction and lithotope, understand fluid properties therein etc..
Drilling and coring delivery obtains rock core initial condition to be affected by factors such as purpose layer depth, stratigraphic horizon, compaction states, is distinguished very big.On the shallower stratum of buried depth or weathering crust etc., coring for broken formation acquisition be generally in chunky shape or loose sand shape, and these broken, loose shapeless rock cores are highly prone to destruction during rock core goes out cylinder, packaging and transhipment.On the one hand rocking during transhipment etc., shake and causes that rock core is loose, ftractures, lose original physical state；Another aspect rock core goes out introduced contaminants in cylinder, transport process can enter rock core, cause the formation parameter of final acquisition inaccurate.
The content of the invention
It is an object of the invention to solve above-mentioned technical problem, there is provided a kind of drilling and coring delivery scene protection goes out the glue injection type rock core Protection Code that a rock core is not damaged with pollution.
Its technical scheme is：The conformal cylinder of aluminium alloy is extracted out together with rock core in cylinder from core barrel, the conformal cylinder of aluminium alloy is cut into into short cylinder together with rock core in cylinder, one end of short cylinder is tamping with Jiao Gai and clip, short cylinder is established makes rock core placed in the middle, the other end is injected the gel for mixing in the annular gap of rock core and the conformal cylinder of aluminium alloy using glue injection machine dedicated injecting glue spray gun, fill and wait after gel gel sets, now rock core is cemented in the conformal cylinder of aluminium alloy, and the other end of short cylinder is tamping with Jiao Gai and clip.
The gel adopts the epoxide resin AB glue of double-component.
The glue-injection machine adopts Motor drive, Electronic Control and according to 1:2 proportioning is automatically mixed two kinds of epoxy resin colloids of A, B, and injecting glue speed fourth gear is adjustable, respectively 2L/min, 4L/min, 8L/min, 16L/min.
The method is applied to loosely or deformed rock core; it protects medium using special gel as rock core; go out before the heart and the brood lac water of A, B two is respectively placed in into glue injection machine dedicated A glue grooves and B glue grooves, it is glue injection machine dedicated that two kinds of glue are mixed into into suitable gel automatically in the ratio of setting.
Using special colloid as rock core protection medium, its advantage is the present invention：It is not to directly take out to pour core tray into but protect rock core by the way of gel sealing to go out a rock core, and the form that rock core can be avoided in the conformal cylinder of transfer transport aluminium alloy is destroyed；Protect rock core and effectively prevent the intrusion of other impurities；Using the colloid of Noninvasive, the colloid is only attached to core surface and not intrusive rock motive hole, does not affect the rock core later stage to chemically examine；Using glue injection machine dedicated colloid is mixed automatically according to proportioning set in advance, reduced artificial manipulation strength, reduced time cost, it is safe and reliable；In order to distinguish colloid and formation material, the formula of colloid can be adjusted, change the color of colloid, reach the purpose for differentiating colloid and formation material, be a kind of high-quality, method efficiently, practical, it is ensured that later experiments room measures the accuracy of geologic parameter.
Specific embodiment
With reference to embodiment, the present invention will be further described.
Gel A and the brood lac water of gel B two are separately added into glue injection machine dedicated A glue grooves and B glue grooves, it is glue injection machine dedicated can by two kinds of glue in setting ratio 1:2 to be mixed into suitable gel automatically standby.The method is built in steel inner cylinder using the aluminium alloy lining that whole length is 9 meters using the mode of coring of shape preserving coring as conformal cylinder, and core-extracting toolsinternal barrel individually hangs lower rig floor after rig floor is separated with outer tube when core-drilling has terminated finishing drilling.After the conformal cylinder of aluminium alloy is extracted out together with rock core in cylinder from inner core, the conformal cylinder of aluminium alloy is cut into one meter of short cylinder according to one meter of length.One end of one meter of short cylinder is tamping with Jiao Gai and clip, short cylinder is established makes rock core placed in the middle, the other end is injected the gel for mixing in the annular gap of rock core and the conformal cylinder of aluminium alloy using glue injection machine dedicated injecting glue spray gun, fill and wait after gel gel sets, now rock core is cemented in the conformal cylinder of aluminium alloy, and the other end of one meter of short cylinder is tamping with Jiao Gai and clip.Now i.e. can safety transhipment rock core.
Claims (3)
1. a kind of glue injection type rock core Protection Code, is characterized in that：The conformal cylinder of aluminium alloy is extracted out together with rock core in cylinder from core barrel, the conformal cylinder of aluminium alloy is cut into into short cylinder together with rock core in cylinder, one end of short cylinder is tamping with Jiao Gai and clip, short cylinder is established makes rock core placed in the middle, the other end is injected the gel for mixing in the annular gap of rock core and the conformal cylinder of aluminium alloy using glue injection machine dedicated injecting glue spray gun, fill and wait after gel gel sets, now rock core is cemented in the conformal cylinder of aluminium alloy, and the other end of short cylinder is tamping with Jiao Gai and clip.
2. glue injection type rock core Protection Code according to claim 1, is characterized in that：The gel adopts the epoxide resin AB glue of double-component.
3. glue injection type rock core Protection Code according to claim 1, is characterized in that：The glue-injection machine adopts Motor drive, Electronic Control and according to 1:2 proportioning is automatically mixed two kinds of epoxy resin colloids of A, B, and injecting glue speed fourth gear is adjustable, respectively 2L/min, 4L/min, 8L/min, 16L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510716274.5A CN106639941A (en) | 2015-10-30 | 2015-10-30 | Gel injection type core protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510716274.5A CN106639941A (en) | 2015-10-30 | 2015-10-30 | Gel injection type core protection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106639941A true CN106639941A (en) | 2017-05-10 |
Family
ID=58830779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510716274.5A Pending CN106639941A (en) | 2015-10-30 | 2015-10-30 | Gel injection type core protection method |
Country Status (1)
| Country | Link |
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| CN (1) | CN106639941A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456715A (en) * | 2020-05-04 | 2020-07-28 | 西南石油大学 | Oil-gas well cement sheath-brittle stratum interface shear bonding strength testing device and method |
| CN111601946A (en) * | 2017-12-27 | 2020-08-28 | 沙特阿拉伯石油公司 | Apparatus and method for in situ stabilization of unconsolidated sediments in core samples |
| CN113107477A (en) * | 2021-05-27 | 2021-07-13 | 成都理工大学 | Portable field sample preservation method |
| CN114607302A (en) * | 2022-04-07 | 2022-06-10 | 中国石油大学(北京) | Core drilling device and core drilling method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111601946A (en) * | 2017-12-27 | 2020-08-28 | 沙特阿拉伯石油公司 | Apparatus and method for in situ stabilization of unconsolidated sediments in core samples |
| CN111456715A (en) * | 2020-05-04 | 2020-07-28 | 西南石油大学 | Oil-gas well cement sheath-brittle stratum interface shear bonding strength testing device and method |
| CN113107477A (en) * | 2021-05-27 | 2021-07-13 | 成都理工大学 | Portable field sample preservation method |
| CN114607302A (en) * | 2022-04-07 | 2022-06-10 | 中国石油大学(北京) | Core drilling device and core drilling method |
| CN114607302B (en) * | 2022-04-07 | 2023-03-07 | 中国石油大学(北京) | Core drilling device and core drilling method |
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Application publication date: 20170510 |
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