CN107573907A - A kind of Protective agent for hydrocarbon reservoir - Google Patents
A kind of Protective agent for hydrocarbon reservoir Download PDFInfo
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- CN107573907A CN107573907A CN201710941792.6A CN201710941792A CN107573907A CN 107573907 A CN107573907 A CN 107573907A CN 201710941792 A CN201710941792 A CN 201710941792A CN 107573907 A CN107573907 A CN 107573907A
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Abstract
The present invention provides a kind of Protective agent for hydrocarbon reservoir, including the composition based on following weight parts：8~12 parts of modified oil-soluble resin, 5~10 parts of microcrystalline cellulose, 5~15 parts of maize cob meal, 40~50 parts of calcium bicarbonate, 10~15 parts of potassium hydroxide, 8~10 parts of mica powder, 5~15 parts of grass meal.The Protective agent for hydrocarbon reservoir unstressed configuration is shown, drilling fluid is few without infiltration, drilling fluid filtrate；Closure bearing capacity with wide spectrum, is added in drilling fluid, can be less than 5cm by immersion depth in 20~40 mesh simulate sandstone formation, can block 0.4mm man-made fractures, and what is formed in 2~4min is more than 10MPa without infiltration mud cake bearing capacity.
Description
Technical field
The present invention relates to reservoir protection technical field in oil drilling, a kind of Protective agent for hydrocarbon reservoir is specifically related to.
Background technology
Oil-gas Layer is drilled open before, under oil-gas reservoir environment, rock forming mineral and formation fluid be in a kind of physics, chemical
Poised state.Original environmental condition can be changed in the operations such as drilling well, completion, well workover, water filling and volume increase or production process, made
Poised state changes, and this may cause Oil ＆ Gas Productivity to decline, and cause formation damage.The influence of formation damage because
Element includes the reason for oil-gas Layer lithology in itself, oil gas current volume property etc. cause damage；Also include causing the original of oil-gas Layer
The various external procedure conditions of the reductions such as permeability.With deepening continuously for exploitation of oil-gas field, strata pressure exhaustion degree is increasingly
Seriously, the accident such as drilling fluid leakage, bit freezing, cave-in happens occasionally.Non-filtration drilling fluid is that there is excellent oil-gas Layer to protect
Shield performance, can effectively reduce drilling fluid filtration, block drop ply, improve Formation bearing pressure, various intricately to solve brill chance
Incident leakage, bit freezing during layer, the technical barrier such as cave in.Impermeable reservoir protection is added in water base, oil base drilling fluid
Dosage form can quickly form impermeability shielding protection layer, and invaded formation is very shallow, effectively drops into non-filtration drilling fluid in bottom
Low filtration loss and filtrate depth of invasion, bottom bearing capacity is improved, avoids the down hole problems such as leakage, bit freezing, cave-in,
With good reservoir protection performance.
Diversified Protective agent for hydrocarbon reservoir is currently, there are, such as publication number CN102977867A, discloses a kind of oil-gas Layer
Protective agent and preparation method thereof, the Protective agent for hydrocarbon reservoir are made up of the raw material of following parts by weight：40~50 parts of paraffin；Albino bitumen
40~50 parts；1~2 part of emulsifying agent；4~5 parts of polymeric alcohol；4~5 parts of polyacrylamide.Its preparation method is：(a) by paraffin, breast
Agent, polymeric alcohol are added in reactor after weighing in proportion, are warming up to 70~90 DEG C, are stirred 20~40 minutes；(b) poly- third is added
Acrylamide, continue stirring 20~40 minutes, add albino bitumen and stir 50~70 minutes；(c) fluid product for reacting gained is existed
Solidify under the conditions of 15~45 DEG C；(d) gained solid product is sent into the pulverizer with cooling back installation and crushed, cross 18 mesh
After sieve.Protective agent for hydrocarbon reservoir provided by the present invention still keeps excellent collapse plugging effect at high temperature under high pressure, right
Oil-gas Layer is pollution-free without damaging, and effective protection to oil-gas Layer can be achieved.And for example, Publication No. CN1461788A, one is disclosed
Kind oil gas layer protective agent for petroleum orilling well, the component and weight proportion contained are that rice husk cracking powder is 15-19 parts, and cotton seed hulls cracks
Powder accounts for 31-45 parts, and calcium bicarbonate accounts for 15-19 parts, flexible fiber 15-20 parts, amphoteric cellulose 5-7 parts, emulsified asphalt 9-20 parts.
Emulsified asphalt, paraffin in two kinds of protective agents have fluorescence reaction, at the scene using there is limitation.
The content of the invention
Present invention seek to address that existing impermeable Protective agent for hydrocarbon reservoir fluorescence grade is high, the initial filter loss of drilling fluid is big, acid
Molten rate is low, there is provided a kind of new Protective agent for hydrocarbon reservoir, the Protective agent for hydrocarbon reservoir unstressed configuration is shown, drilling fluid is without infiltration, drilling fluid
Filtrate filter loss is small；Closure bearing capacity with wide spectrum, is added in drilling fluid, can be in 20~40 mesh simulate sandstone formation
Immersion depth is less than 5cm, can block 0.4mm man-made fractures, and what is formed in 2~4min is more than without infiltration mud cake bearing capacity
10MPa。
In order to solve the above technical problems, the present invention is achieved through the following technical solutions；
A kind of Protective agent for hydrocarbon reservoir, it is characterised in that：Including the composition based on following weight parts：Modified oil-soluble resin 8~12
Part, 5~10 parts of microcrystalline cellulose, 5~15 parts of maize cob meal, 40~50 parts of calcium bicarbonate, 10~15 parts of potassium hydroxide, mica powder 8
~10 parts, 5~15 parts of grass meal.
The modified oil-soluble resin is to act on the condensation polymer formed by formaldehyde and phenol to react with rosin, with third after reaction
Triol is mediated, and then drying, crushing obtains.
The modified oil-soluble resin is that granule size is 40~100 mesh, under the granule size, modified oil-soluble tree
The swellability of fat is good, plastic deformation is excellent while has filling effect and unstressed configuration again.
The granule size of the maize cob meal is 10~40 mesh, calcium bicarbonate granule size is 40~200 mesh, hydroxide
Potassium granule size is 5~10 mesh, mica powder granule size is 20~100 mesh, grass meal granule size is 20~80 mesh.
Dosage of the Protective agent for hydrocarbon reservoir in water-base drilling fluid is 1~2%.
The Protective agent for hydrocarbon reservoir is prepared as follows：
A, modified oil-soluble resin, microcrystalline cellulose, maize cob meal, calcium bicarbonate, potassium hydroxide, mica are weighed according to the above ratio
Powder, grass meal, it is standby；
B, raw material that step A has been weighed is sent into stirring 3-4 hours in agitator and produces Protective agent for hydrocarbon reservoir.
In the above method, the rotating speed of stirring controls 60-90 revs/min, and material stirs in agitator, and material rubs each other
Wiping generation heat causes material to be oven-dried, and the product water content of the Protective agent for hydrocarbon reservoir finally given is less than 10%.
The invention has the advantages that：
1st, Protective agent for hydrocarbon reservoir of the present invention has the closure bearing capacity of wide spectrum, is added to water-base drilling fluid（Drilling fluid）In, and
Colloidal solid in drilling fluid carries out multistage effectively filling on bed course, is quickly formed in borehole wall band thin（2-3 millimeters）It is and fine and close
Internal filter cake, it is demonstrated experimentally that drilling fluid can be made to be down to zero by full leak-off in layer of sand filter loss, immerse layer of sand depth and be less than 5cm,
0.4mm man-made fractures can be blocked；What is formed in 2~4min is more than 10MPa, protective agent of the present invention without infiltration mud cake bearing capacity
In the effect above have benefited from modified oil-soluble resin, microcrystalline cellulose, maize cob meal, calcium bicarbonate, potassium hydroxide, mica powder,
Grass meal raw material specifically combines, the geometric jacquard patterning unit surface forms of these specific several raw materials respectively slice-shaped, spherical and do not advise again
Then polygon, under conditions of having differential pressure action, various materials are mutually inlayed in formation rock hole and drilling fluid filter cake, filled out
Fill, quickly form the filter cake barrier of densification, meanwhile, mud cake forms a protective barrier, shale particle and filtrate in borehole wall surface
All without penetrating into gas channel, once borehole wall pressure reduces, oil or gas, which can be easier to break through mud cake, to ooze out, so as to effectively
Reservoir protec-tion.
2nd, specific add has maize cob meal, grass meal, calcium bicarbonate in the present invention, and three kinds of raw materials not only canWithModified oil
The raw materials such as soluble resin, microcrystalline cellulose and mica powder are mutually inlayed, filled, and quickly form the filter cake barrier of densification, and combination makes
With rear, it is easy to be acidified, so, wall cake is easy to release by being acidified, and protective barrier is removed quickly, makes gas channel smooth
Logical, the oil gas in stratum can greatly ooze out, so as to increase production or high yield.The product also prevents to permeability loss simultaneously
Leakage or the effect for reducing wastage.
3rd, the various raw materials in protective agent of the invention are insoluble or are insoluble in water, will not change clay in drilling fluid after mixing
The surface charge of particle, so in defined dosage scope people, the viscosity of drilling fluid will not be increased considerably, drilling fluid is original
Viscosity, shear force, do not change substantially, and the API dehydrations and HTHP dehydration of drilling fluid decrease, overcome scene due to
Product, which rises to glue, cuts the problem of being difficult to add.Meanwhile the product dosage is small, effect is good, and addition 1%-2% can reach pre- in mud
The effect of phase.
4th, in the present invention, modified oil-soluble resin contains part mineral oil in water-base drilling fluid（Such as lubricant）Situation
Under, there can be the phenomenon of swelling so as to play plugging action, and microcrystalline cellulose is not soluble in water, is in weakly alkaline bar in water-base drilling fluid
Under part, swelling can be soaked, so as to play plugging action, both has the grain that the raw material of plugging action is ground into a certain size
Degree, then filling, build bridge formation closure, filling by the maize cob meal of certain particle size size, mica powder, grass meal and calcium bicarbonate
Formation rock hole and drilling fluid filter cake, the Protective agent for hydrocarbon reservoir in clay particle gap.
Embodiment
The present invention is described in detail with reference to specific embodiment.
Embodiment 1
A kind of Protective agent for hydrocarbon reservoir, including the composition based on following weight parts：8 parts of modified oil-soluble resin, 5 parts of microcrystalline cellulose,
5 parts of maize cob meal, 40 parts of calcium bicarbonate, 10 parts of potassium hydroxide, 8 parts of mica powder, 5 parts of grass meal.
Embodiment 2
A kind of Protective agent for hydrocarbon reservoir, including the composition based on following weight parts：12 parts of modified oil-soluble resin, microcrystalline cellulose 10
Part, 15 parts of maize cob meal, 50 parts of calcium bicarbonate, 15 parts of potassium hydroxide, 10 parts of mica powder, 15 parts of grass meal.
Embodiment 3
A kind of Protective agent for hydrocarbon reservoir, including the composition based on following weight parts：10 parts of modified oil-soluble resin, 8 parts of microcrystalline cellulose,
10 parts of maize cob meal, bicarbonate Ca45 part, 12 parts of potassium hydroxide, 9 parts of mica powder, 10 parts of grass meal.
Embodiment 4
A kind of Protective agent for hydrocarbon reservoir, including the composition based on following weight parts：8 parts of modified oil-soluble resin, 10 parts of microcrystalline cellulose,
10 parts of maize cob meal, 50 parts of calcium bicarbonate, 15 parts of potassium hydroxide, 10 parts of mica powder, 15 parts of grass meal.
Embodiment 5
A kind of Protective agent for hydrocarbon reservoir, including the composition based on following weight parts：12 parts of modified oil-soluble resin, 6 parts of microcrystalline cellulose,
12 parts of maize cob meal, bicarbonate Ca45 part, 13 parts of potassium hydroxide, 8 parts of mica powder, 8 parts of grass meal.
Embodiment 6
A kind of Protective agent for hydrocarbon reservoir, including the composition based on following weight parts：10 parts of modified oil-soluble resin, microcrystalline cellulose 10
Part, 8 parts of maize cob meal, 43 parts of calcium bicarbonate, 10 parts of potassium hydroxide, 9 parts of mica powder, 8 parts of grass meal.
In above-described embodiment 1-6, the modified oil-soluble resin be by formaldehyde and phenol act on the condensation polymer formed with
Rosin reacts, and is mediated after reaction with glycerine, the particle that then drying, crushing obtain.
Embodiment 7
The present embodiment uses the formula of embodiment 2, and on this basis, in the present embodiment, the modified oil-soluble resin is granularity
Size is 40 mesh particles.The granule size of the maize cob meal is 10 mesh, calcium bicarbonate granule size is 40 mesh, hydroxide
Potassium granule size is 5 mesh, mica powder granule size is 20 mesh, grass meal granule size is 20 mesh.
Embodiment 8
The present embodiment and the difference of embodiment 7 are：In the present embodiment, the modified oil-soluble resin is that granule size is 100
Mesh particle.The granule size of the maize cob meal is 40 mesh, calcium bicarbonate granule size is that 200 mesh, potassium hydroxide granularity are big
Small is 10 mesh, mica powder granule size is 100 mesh, grass meal granule size is 80 mesh.
Embodiment 9
The present embodiment and the difference of embodiment 7 are：In the present embodiment, the modified oil-soluble resin is that granule size is 80 mesh
Particle；The granule size of the maize cob meal is 20 mesh, calcium bicarbonate granule size is 100 mesh, potassium hydroxide granule size is
10 mesh, mica powder granule size are 60 mesh, grass meal granule size is 40 mesh.
Embodiment 10
The present embodiment provides the preparation method of the Protective agent for hydrocarbon reservoir in above-described embodiment 1-9, comprises the steps
A, modified oil-soluble resin, microcrystalline cellulose, maize cob meal, calcium bicarbonate, potassium hydroxide, mica are weighed according to the above ratio
Powder, grass meal, it is standby；
B, raw material that step A has been weighed is sent into stirring 3-4 hours in agitator and produces Protective agent for hydrocarbon reservoir.
The rotating speed control of the stirring is 60-90 revs/min.After prepared by the above method, obtained oil-gas Layer should be controlled
Protectant water content is less than 10%.
In order to better illustrate the oil gas protective layer of the present invention, 7 groups of contrast experiments are set, wherein,
Contrast groups 1 form：It is only to be free of modified oil-soluble resin with the difference that the present invention forms；
Contrast groups 2 form：Composition difference with the present invention is only to be free of microcrystalline cellulose；
Contrast groups 3 form：Composition difference with the present invention is only to be free of maize cob meal；
Contrast groups 4 form：Composition difference with the present invention is only to be free of calcium bicarbonate；
Contrast groups 5 form：Composition difference with the present invention is only to be free of potassium hydroxide；
Contrast groups 6 form：Composition difference with the present invention is only to be free of mica powder；
Contrast groups 7 form：Composition difference with the present invention is only to be free of grass meal.
By the present invention and 7 groups of contrast groups Protective agent for hydrocarbon reservoir use after residue on sieve mass fraction, viscosity lift-off value,
Filtrate immerses casting bed depth, acid-soluble ratio data statistics in table 1 below；
Table 1
The contrast groups 1-7 Protective agent for hydrocarbon reservoir it can be seen from the data of upper table 1, although only different from the present invention in composition,
It is that the overall performance index of Protective agent for hydrocarbon reservoir really has larger gap with the present invention.
Service condition explanation
In order to better illustrate the present invention, prepare raw material by the Protective agent for hydrocarbon reservoir composition in embodiment 9 and requirement, then by standard
The raw material got ready, which is sent into agitator to stir 3.5 hours, produces Protective agent for hydrocarbon reservoir.The rotating speed control of stirring is 70 revs/min.
The Protective agent for hydrocarbon reservoir that the embodiment is obtained is showed in a gram deep 2-1-6, gram deep 2-1-7, enlightening tri- mouthfuls of wells of that 2-11 respectively
Field is used, and it is documented in table 2 below using process and using result：
Table 2
From the onsite application result of upper table 2, oil layer protective agent of the present invention is truly feasible, significant effect.
Claims (8)
- A kind of 1. Protective agent for hydrocarbon reservoir, it is characterised in that：Including the composition based on following weight parts：Modified oil-soluble resin 8~ 12 parts, 5~10 parts of microcrystalline cellulose, 5~15 parts of maize cob meal, 40~50 parts of calcium bicarbonate, 10~15 parts of potassium hydroxide, mica powder 8~10 parts, 5~15 parts of grass meal.
- A kind of 2. Protective agent for hydrocarbon reservoir according to claim 1, it is characterised in that：The modified oil-soluble resin is by first Aldehyde acts on the condensation polymer to be formed with phenol and reacted with rosin, is mediated after reaction with glycerine, and then drying, crushing obtains.
- A kind of 3. Protective agent for hydrocarbon reservoir according to claim 1 or 2, it is characterised in that：The modified oil-soluble resin Granule size is 40~100 mesh.
- A kind of 4. Protective agent for hydrocarbon reservoir according to claim 1, it is characterised in that：The granule size of the maize cob meal is 10~40 mesh, the calcium bicarbonate granule size is 40~200 mesh, potassium hydroxide granule size is 5~10 mesh, mica Powder Particle Size Size is 20~100 mesh, grass meal granule size is 20~80 mesh.
- A kind of 5. Protective agent for hydrocarbon reservoir according to claim 1, it is characterised in that：The Protective agent for hydrocarbon reservoir is in water base brill Dosage in well liquid is 1~2%.
- A kind of 6. Protective agent for hydrocarbon reservoir according to claim 1, it is characterised in that：The Protective agent for hydrocarbon reservoir presses following sides It is prepared by method：A, modified oil-soluble resin, microcrystalline cellulose, maize cob meal, calcium bicarbonate, potassium hydroxide, mica are weighed according to the above ratio Powder, grass meal, it is standby；B, raw material that step A has been weighed is sent into stirring 3-4 hours in agitator and produces Protective agent for hydrocarbon reservoir.
- A kind of 7. Protective agent for hydrocarbon reservoir according to claim 6, it is characterised in that：The rotating speed control of the stirring is 60- 90 revs/min.
- A kind of 8. Protective agent for hydrocarbon reservoir according to claim 6, it is characterised in that：The water content of the Protective agent for hydrocarbon reservoir Less than 10%.
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| CN201710941792.6A CN107573907A (en) | 2017-10-11 | 2017-10-11 | A kind of Protective agent for hydrocarbon reservoir |
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| CN201710941792.6A CN107573907A (en) | 2017-10-11 | 2017-10-11 | A kind of Protective agent for hydrocarbon reservoir |
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Citations (6)
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|---|---|---|---|---|
| EP1743906A2 (en) * | 2005-07-15 | 2007-01-17 | National Starch and Chemical Investment Holding Corporation | Modified polysaccharides |
| US20110005756A1 (en) * | 2005-12-09 | 2011-01-13 | Clearwater International, Llc | Use of zeta potential modifiers to decrease the residual oil saturation |
| CN104232037A (en) * | 2014-08-27 | 2014-12-24 | 克拉玛依市金鑫科技有限公司 | Crack plugging agent for oil-base drilling fluids |
| CN105368409A (en) * | 2015-11-24 | 2016-03-02 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Composite type leakage plugging agent for oil-based drilling fluid and preparation method thereof |
| CN106318345A (en) * | 2016-08-18 | 2017-01-11 | 库尔勒同益工贸有限责任公司 | Low-fluorescence anti-collapse blocking agent for drilling fluid and preparation method thereof |
| CN106609127A (en) * | 2015-10-26 | 2017-05-03 | 中国石油化工股份有限公司 | Oil-based drilling fluid plugging material and preparation method thereof |
-
2017
- 2017-10-11 CN CN201710941792.6A patent/CN107573907A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1743906A2 (en) * | 2005-07-15 | 2007-01-17 | National Starch and Chemical Investment Holding Corporation | Modified polysaccharides |
| US20110005756A1 (en) * | 2005-12-09 | 2011-01-13 | Clearwater International, Llc | Use of zeta potential modifiers to decrease the residual oil saturation |
| CN104232037A (en) * | 2014-08-27 | 2014-12-24 | 克拉玛依市金鑫科技有限公司 | Crack plugging agent for oil-base drilling fluids |
| CN106609127A (en) * | 2015-10-26 | 2017-05-03 | 中国石油化工股份有限公司 | Oil-based drilling fluid plugging material and preparation method thereof |
| CN105368409A (en) * | 2015-11-24 | 2016-03-02 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Composite type leakage plugging agent for oil-based drilling fluid and preparation method thereof |
| CN106318345A (en) * | 2016-08-18 | 2017-01-11 | 库尔勒同益工贸有限责任公司 | Low-fluorescence anti-collapse blocking agent for drilling fluid and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 王中华等: "《油田化学品实用手册》", 31 July 2004 * |
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Application publication date: 20180112 |