CN109709265A - A kind of high density drilling fluid carbon dioxide pollution experimental evaluation device and method - Google Patents
A kind of high density drilling fluid carbon dioxide pollution experimental evaluation device and method Download PDFInfo
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- CN109709265A CN109709265A CN201811406670.8A CN201811406670A CN109709265A CN 109709265 A CN109709265 A CN 109709265A CN 201811406670 A CN201811406670 A CN 201811406670A CN 109709265 A CN109709265 A CN 109709265A
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- drilling fluid
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- carbon dioxide
- ageing
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Abstract
The present invention discloses a kind of high density drilling fluid carbon dioxide pollution experimental evaluation device and method, apparatus structure may include: ageing can, cover is connected at the top of the ageing can, valve rod is connected on the cover, liner is provided on the aging top tank structure and bottom wall, cross baffle is inserted between the liner, airtight connection has liner lid at the top of the liner, offers central small hole among the liner lid；Multiple through-holes are uniformly provided on the cross baffle.Evaluation method based on the device real simulation can measure property of drilling fluid variation after carbon dioxide pollution comprehensively, prevent and handle carbon dioxide pollution to provide foundation for high density drilling fluid, overcomes aging tank caused by previous pressure perfusion method because carbon dioxide corrosion product influences property of drilling fluid and the disadvantage of carbon dioxide and drilling fluid mixed pollution level deficiency.
Description
Technical field
The present invention relates to oil and gas well drilling liquid field of engineering technology, more particularly to a kind of high density drilling fluid dioxy
Change carbon and pollutes experimental evaluation device and method.
Background technique
As needs of the China to petroleum resources are increasing, deep-well, ultradeep well and abnormal high temperature high-pressure well are increasing,
It is also more and more frequent using high-temperature high-density drilling fluid, it will appear CO often in deep formation2The case where invading drilling fluid, CO2
Intrusion drilling fluid will appear following characteristics:
1. drilling fluid is in dark gray or taupe, it is in black dull coloring agent oily when seriously polluted, containing a large amount of bubbles and is not easy to disappear
It removes.2. drilling fluid viscosity and shear force are high, performance is extremely unstable, with iron complex salt FLCS and sulfonation tannin SMT base extraction
It does not work.3. drilling fluid poor fluidity, and skin effect phenomenon is serious.4. drilling fluid wall built-up phenomenon is serious.5. drilling fluid filtration
It is difficult to control, fluctuation is big.Although can control filter loss within 5ml by using a large amount of fluid loss additives, mud cake is thick and empty.
6. viscosimeter pointer does not return to zero when measuring drilling fluid rheology, measure data precision is influenced.7. drilling liquid pH value is difficult to control.⑧
Bentonite and solid concentration are in range of normal value, but thixotropy is strong, are in " thumbnail " shape after static.CO2As a kind of acidity
Gas intrusion drilling fluid will cause property of drilling fluid deterioration, brings extreme difficulties to property of drilling fluid maintenance, seriously threatens drilling well
Safety, while also bringing environmental protection pressure.Therefore, CO is studied2To property of drilling fluid affecting laws and CO2Drilling fluid after pollution
Processing method just seems critically important, and these research work are required to the evaluation CO of science2Pollute the experimental provision of drilling fluid
And method.
Evaluation CO at present2The experimental provision and method for polluting drilling fluid carry out indoor CO using pressure perfusion method2Pollute mould
Draft experiment: using the ageing can of conventional drilling liquid, drilling fluid being fitted into ageing can, under a certain pressure by CO2From aging
Tank top valve rod is pressed into ageing can, and then ageing can is put into high temp roller furnace, is rolled under the conditions of simulating bottom hole temperature (BHT)
Certain time, usually 16h, takes out ageing can, surveys its performance after drilling fluid therein is poured out stirring 5min after cooling.
CO is evaluated using pressure perfusion method at present2Pollution drilling fluid experimental method has the following problems:
(1) CO in ageing can2Easily causing corrosion to aging tank under high-temperature and high-pressure conditions, (ageing can material is logical
Often it is 304 steel or 316 steel), corrosion product, which is mixed into, will also result in the performance of drilling fluid and changes in drilling fluid, therefore meeting
To CO2Severe jamming is caused to the influence degree of drilling fluid；(2) drilling well when ageing can rolls in roller heating furnace, in tank
Liquid liquid level be substantially it is horizontal, in liquid phase drilling fluid and gaseous CO2There are apparent liquid-gas two-phase interface, under gaseous state
CO2Invading motive force in drilling fluid is only CO2Concentration difference, due to drilling fluid have certain viscosity and shear force,
CO2The degree for polluting drilling fluid is very limited, this and CO2There is very big difference in the real processes of underground intrusion drilling fluid, specifically
It says, is exactly drilling fluid and CO in pressure perfusion method2The mixability of the two is not enough.
Summary of the invention
The object of the present invention is to provide a kind of high density drilling fluid carbon dioxide pollution experimental evaluation device and method, with solution
Certainly the above-mentioned problems of the prior art can prevent CO2Corrosion and ageing tank can increase CO again under high-temperature and high-pressure conditions2
With drilling fluid mixed degree.
To achieve the above object, the present invention provides following schemes:
The present invention provides a kind of high density drilling fluid carbon dioxide pollution experimental evaluation device, including ageing can, described old
Change tank top and be connected with cover, valve rod is connected on the cover, is provided with liner on the aging top tank structure and bottom wall, it is described
It is inserted with cross baffle between liner, at the top of the liner airtight connection has liner lid, offers among the liner lid
Heart aperture；Multiple through-holes are uniformly provided on the cross baffle.
Optionally, the internal diameter of the ageing can is 63.5mm；Tank inner height is 160mm；Volume is 500ml.
Optionally, the internal diameter of the liner is 56.5mm；With a thickness of 3.5mm；Height is 145mm.
Optionally, the liner lid includes upper and lower two layers, uses seal with elastometic washer among upper and lower two layers of liner lid；In described
Lower layer's diameter of lining lid is 56mm, and upper layer diameter is 63mm, lower thickness 6mm, upper thickness 3.5mm, and central small hole is straight
Diameter is 1mm.
Optionally, the liner portion of covering is connected with protrusion, and the diameter of the protrusion is 15mm, a height of 8mm, the protrusion
It is integrally formed with the liner lid.
Optionally, cross baffle includes the panel of the identical cuboid-type of two block structures, two pieces of positive crosses of panel
Type intersects；The through-hole is opened on the panel.
Optionally, every piece of a length of 138mm of panel；Width is 56mm；Thickness is 2.0mm；Through-hole aperture is 5mm；Adjacent two
The pitch-row of a through-hole is 5mm.
Optionally, the material of the liner, liner lid and cross baffle is polytetrafluoroethylene (PTFE).
The present invention also provides a kind of high density drilling fluid carbon dioxide pollution experimental evaluation method, main includes following step
It is rapid:
(1) experimental provision is assembled, liner is packed into ageing can；Cross baffle is inserted into liner；
(2) drilling fluid 300ml to be evaluated is poured into ageing can, covers liner lid, it is ensured that the central small hole of liner lid is not
It is blocked, then the cover of ageing can is tightened；
(3) with pipeline by the valve rod and CO on the cover of ageing can2Gas cylinder connection, unscrewing valve rod makes CO in ageing can2Point
Pressure reaches setting value；Keep the CO in ageing can2Partial pressure is located at setting value and tightens valve rod, sheds connecting pipeline；
(4) ageing can is put into roller heating furnace after aging at a set temperature rolls 16h and is taken out, poured out after cooling
Drilling fluid is tested for the property, and experiment terminates.
The present invention achieves following technical effect compared with the existing technology:
High density drilling fluid carbon dioxide pollution experimental evaluation device and method provided by the invention, can true mould comprehensively
Property of drilling fluid changes after quasi- measurement carbon dioxide pollution, for high density drilling fluid prevention and processing carbon dioxide pollution provide according to
According to, overcome aging tank caused by previous pressure perfusion method because carbon dioxide corrosion product on property of drilling fluid influence and
The disadvantage of carbon dioxide and drilling fluid mixed pollution level deficiency.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is high density drilling fluid carbon dioxide pollution experimental evaluation apparatus structure schematic diagram of the present invention；
Fig. 2 is the liner lid structural schematic diagram of high density drilling fluid carbon dioxide pollution experimental evaluation device of the present invention；
Fig. 3 is that the cross baffle arrangement of high density drilling fluid carbon dioxide pollution experimental evaluation device of the present invention is overlooked
Figure；
Fig. 4 is the faceplate through holes distribution schematic diagram of high density drilling fluid carbon dioxide pollution experimental evaluation device of the present invention；
Wherein, 1 be ageing can, 1-1 is cover, 2 be liner, 3 be liner lid, 3-1 is center aperture, 3-2 is protrusion, 4
For cross baffle, 4-1 be through-hole, 4-2 is panel.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of high density drilling fluid carbon dioxide pollution experimental evaluation device and method, with solution
Certainly the above-mentioned problems of the prior art can prevent CO2Corrosion and ageing tank can increase CO again under high-temperature and high-pressure conditions2
With drilling fluid mixed degree.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
The present invention provides a kind of high density drilling fluid carbon dioxide pollution experimental evaluation device, as Figure 1-Figure 4, including
By the ageing can 1 for the high temperature and pressure that 304 type stainless steels form, it is connected with cover 1-1 at the top of ageing can 1, is connected on cover 1-1
Valve rod is provided with integrated liner 2 on 1 inner wall of ageing can and bottom wall, is inserted with cross baffle 4 between liner 2, at the top of liner
Airtight connection has liner lid 3, and central small hole 3-1 is offered among liner lid 3；It is uniformly provided on cross baffle 4 multiple logical
Hole 4-1.
Specifically, the internal diameter of ageing can 1 is 63.5mm；Tank inner height is 160mm；Volume is 500ml.The internal diameter of liner 2
For 56.5mm；With a thickness of 3.5mm；Height is 145mm.Liner lid 3 includes upper and lower two layers, is used among upper and lower two layers of liner lid 3
Seal with elastometic washer；Lower layer's diameter of liner lid 3 is 56mm, and upper layer diameter is 63mm, lower thickness 6mm, and upper thickness is
3.5mm, central small hole 3-1 diameter are 1mm.3 top of liner lid is connected with raised 3-2, and the diameter of raised 3-2 is 15mm, a height of
8mm, raised 3-2 and liner lid 3 are integrally formed, and central small hole 3-1 perforation liner lid 3 and protrusion 3-2.
It is further preferred that cross baffle 4 includes the panel 4-2 of the identical cuboid-type of two block structures, two pieces of panels
It is in 90 degree of intersections that 4-2 is just cross；Through-hole 4-1 is opened on panel 4-2.Every piece of a length of 138mm of panel 4-2；Width is 56mm；
Thickness is 2.0mm；The aperture through-hole 4-1 is 5mm；4 exhausting hole 4-1 of cloth, 13 through-hole 4- of every row along its length on every piece of panel 4-2
The pitch-row of 1, two neighboring through-hole 4-1 are 5mm.
The material of liner 2, liner lid 3 and cross baffle 4 is polytetrafluoroethylene (PTFE).
The present invention also provides a kind of high density drilling fluid carbon dioxide pollution experimental evaluation method, main includes following step
It is rapid:
(1) experimental provision is assembled, liner 2 is packed into ageing can 1；Cross baffle 4 is inserted into liner 2；
(2) drilling fluid 300ml to be evaluated is poured into ageing can 1, covers liner lid 3, it is ensured that the central small hole of liner lid 3
It is not blocked, then the cover of ageing can 1 is tightened；
(3) with pipeline by the valve rod and CO on the cover of ageing can 12Gas cylinder connection, unscrewing valve rod makes CO in ageing can2
Partial pressure reaches setting value；Keep the CO in ageing can2Partial pressure is located at setting value and tightens valve rod, sheds connecting pipeline；
(4) ageing can 1 is put into roller heating furnace after aging at a set temperature rolls 16h and is taken out, fallen after cooling
Drilling fluid is tested for the property out, and experiment terminates.
The present invention real simulation can measure property of drilling fluid variation after carbon dioxide pollution comprehensively, be high density drilling fluid
Prevention and processing carbon dioxide pollution provide foundation, overcome aging tank caused by previous pressure perfusion method because of carbon dioxide
Corrosion product is influenced on property of drilling fluid and the disadvantage of carbon dioxide and drilling fluid mixed pollution level deficiency.
Specific examples are applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (9)
1. a kind of high density drilling fluid carbon dioxide pollution experimental evaluation device, it is characterised in that: including ageing can, the aging
Tank top is connected with cover, and valve rod is connected on the cover, and liner is provided on the aging top tank structure and bottom wall, described interior
Cross baffle is inserted between lining, airtight connection has liner lid at the top of the liner, offers center among the liner lid
Aperture；Multiple through-holes are uniformly provided on the cross baffle.
2. high density drilling fluid carbon dioxide pollution experimental evaluation device according to claim 1, it is characterised in that: described
The internal diameter of ageing can is 63.5mm；Tank inner height is 160mm；Volume is 500ml.
3. high density drilling fluid carbon dioxide pollution experimental evaluation device according to claim 1, it is characterised in that: described
The internal diameter of liner is 56.5mm；With a thickness of 3.5mm；Height is 145mm.
4. high density drilling fluid carbon dioxide pollution experimental evaluation device according to claim 1, it is characterised in that: described
Liner lid includes upper and lower two layers, uses seal with elastometic washer among upper and lower two layers of liner lid；Lower layer's diameter of the liner lid is
56mm, upper layer diameter are 63mm, lower thickness 6mm, upper thickness 3.5mm, and central small hole diameter is 1mm.
5. high density drilling fluid carbon dioxide pollution experimental evaluation device according to claim 4, it is characterised in that: described
The liner portion of covering is connected with protrusion, and the diameter of the protrusion is 15mm, a height of 8mm, the protrusion and the liner lid one at
Type.
6. high density drilling fluid carbon dioxide pollution experimental evaluation device according to claim 1, it is characterised in that: cross
Type baffle includes the panel of the identical cuboid-type of two block structures, the just cross intersection of two pieces of panels；The through-hole opens up
In on the panel.
7. high density drilling fluid carbon dioxide pollution experimental evaluation device according to claim 6, it is characterised in that: every piece
The a length of 138mm of panel；Width is 56mm；Thickness is 2.0mm；Through-hole aperture is 5mm；The pitch-row of the two neighboring through-hole is
5mm。
8. high density drilling fluid carbon dioxide pollution experimental evaluation device according to claim 1, it is characterised in that: described
The material of liner, liner lid and cross baffle is polytetrafluoroethylene (PTFE).
9. a kind of high density drilling fluid carbon dioxide pollution experimental evaluation method, characterized by the following steps:
(1) experimental provision is assembled, liner is packed into ageing can；Cross baffle is inserted into liner；
(2) drilling fluid 300ml to be evaluated is poured into ageing can, covers liner lid, it is ensured that the central small hole of liner lid is not blocked
Extremely, then by the cover of ageing can it tightens；
(3) with pipeline by the valve rod and CO on the cover of ageing can2Gas cylinder connection, unscrewing valve rod makes CO in ageing can2Partial pressure reaches
To setting value；Keep the CO in ageing can2Partial pressure is located at setting value and tightens valve rod, sheds connecting pipeline；
(4) ageing can is put into roller heating furnace after aging at a set temperature rolls 16h and is taken out, pour out drilling well after cooling
Liquid is tested for the property, and experiment terminates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811406670.8A CN109709265A (en) | 2018-11-23 | 2018-11-23 | A kind of high density drilling fluid carbon dioxide pollution experimental evaluation device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811406670.8A CN109709265A (en) | 2018-11-23 | 2018-11-23 | A kind of high density drilling fluid carbon dioxide pollution experimental evaluation device and method |
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| CN109709265A true CN109709265A (en) | 2019-05-03 |
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| CN201811406670.8A Pending CN109709265A (en) | 2018-11-23 | 2018-11-23 | A kind of high density drilling fluid carbon dioxide pollution experimental evaluation device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114371257A (en) * | 2022-01-12 | 2022-04-19 | 成都汇能恒源科技有限公司 | Indoor evaluation method for carbon dioxide pollution of drilling fluid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114371257A (en) * | 2022-01-12 | 2022-04-19 | 成都汇能恒源科技有限公司 | Indoor evaluation method for carbon dioxide pollution of drilling fluid |
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Application publication date: 20190503 |