CN106398669A - Method for preparing pressure-bearing blocking agent for drilling fluid - Google Patents
Method for preparing pressure-bearing blocking agent for drilling fluid Download PDFInfo
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- CN106398669A CN106398669A CN201610778008.XA CN201610778008A CN106398669A CN 106398669 A CN106398669 A CN 106398669A CN 201610778008 A CN201610778008 A CN 201610778008A CN 106398669 A CN106398669 A CN 106398669A
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- drilling fluid
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/03—Specific additives for general use in well-drilling compositions
- C09K8/035—Organic additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a method for preparing a pressure-bearing blocking agent for drilling fluid. The pressure-bearing blocking agent is prepared from the following components in parts by weight: 40-50 parts of walnut shell powder, 30-40 parts of straw cracking fiber, 4-8 parts of calcium carbonate powder, 1-3 parts of ammonium salt of partially hydrolyzed polyacrylonitrile, 10-20 parts of a penetration-resistant agent, 5-10 parts of carboxymethyl cellulose, 5-10 parts of redispersible latex powder and 10-20 parts of modified asphalt. The method comprises the following steps: putting the components into stirring equipment, mixing for 1-2 hours, and drying and pelleting at constant temperature of 60 DEG C till the average particle size is 20-300 meshes, so as to obtain the pressure-bearing blocking agent for the drilling fluid. The pressure-bearing blocking agent prepared by using the method has the advantages of being good in blocking effect and high in pressure bearing strength, and materials are cheap and easy to obtain.
Description
Technical field
The present invention relates to a kind of oil drilling used additives, more particularly, to a kind of drilling fluid preparation side of pressurization sealing agent
Method, belongs to petroleum drilling technology field.
Background technology
In petroleum exploration and development process, leakage is a kind of most commonly seen complicated phenomenon, especially on microcrack stratum, oozes
Permeability stratum, shale formation, coal seam, crushed zone stratum and reservoir, borehole well instability, leakage risk greatly increase；Borehole well instability is led to
Often result in hole collapse, cause bit freezing, the risk of landfill drilling tool, and the generation of leakage, substantially increase formation damage, drilling well
Liquid deployment cost, extends drilling period, or even brings well control risk, causes great economic loss.At present, have no in industry
One kind can improve borehole wall stability, can carry out pressure-bearing filling again, the borehole wall is played with the leakproof product of invigoration effect；And it is traditional
Drill-feeding plugging agent, sawdust powder product, due to size grading effect on driving birds is not good, can be only used for processing permeability loss and little leakage, with
Bore loss larger, need to be continuously replenished；And easily repeated leakage after leakage process, greatly reduce brill completion efficiency；Should
Class inorganic agent can not reach the effect of preferable stabilizing borehole, pre- lost circulation prevention and raising borehole wall bearing capacity, and most of product
In contain component of polymer, on drilling fluid rheology affect larger, constrain the popularization and application of such product.
As Publication No. CN105441044A, the patent of invention of entitled " a kind of oil base drilling fluid sealing agent ", this is special
The open sealing agent of profit includes：Fiber 15～20%, walnut shell 10～25%, oil suction polymer beads 20～40%, oil base nucleocapsid expands
Sealing agent 40～60%, above-mentioned raw materials mix homogeneously is oil base drilling fluid sealing agent.Oil base nucleocapsid is comprised swollen in this patent
Swollen sealing agent, belongs to chemical plugging material, and it is expensive, construction configuration is complicated, still can not be widely applied.And do not examine
Consider level and join factor it is impossible to carry out plugging while drilling, the closure to microcrack is not enough.
And for example Publication No. CN102453475A, entitled " a kind of leak-stopping agent for petroleum drilling and preparation method thereof and should
With " patent of invention, the open sealing agent of this patent comprises leakage-stop liquid A and leakage-stop liquid B, and leakage-stop liquid A comprises alginate, walnut shell
And water, counted with water for 100 weight portions, alginate：0.5～0.8 weight portion, walnut shell：0～5 weight portion；Leakage-stop liquid B comprises
Oil-well cement, fiber and water, are counted with water for 100 weight portions, oil-well cement：200～250 weight portions, fiber：0.5～1 weight
Part；The volume ratio of leakage-stop liquid A and leakage-stop liquid B is 1: 2～1: 3.Preparation method includes：A, alginate are dissolved in water wiring solution-forming,
Add walnut shell, prepared leakage-stop liquid A；B, oil-well cement and water are made into cement mortar, add fiber, prepared leakage-stop liquid B.This invention belongs to
In gel leak stopping and bridge formation leak stopping mixing material, equally do not consider that material level is joined, not good to microcrack plugging effect.
Content of the invention
Present invention seek to address that sealing agent inorganic agent of the prior art can not reach preferable stabilizing borehole, pre- leakproof
Lose, improve the effect of borehole wall bearing capacity and the problem of high cost, propose a kind of preparation side of new drilling fluid sealing agent
Method, the walnut shell powder of special ratios, Caulis et Folium Oryzae are cracked being used in mixed way of fiber, modified pitch and multiple auxiliary agent, can be effective
Microcrack is carried out with pressure-bearing filling, pre- lost circulation prevention, collapses, improve borehole wall bearing capacity and stability.
In order to realize foregoing invention purpose, technical scheme is as follows：
A kind of preparation method of drilling fluid pressurization sealing agent comprises the following steps：
（1）Extract Caulis et Folium Oryzae cracking fiber first：Straw raw material is carried out with the separation of leaf, bar and fringe, discards Ye Hesui, bar is cut
Become 3-5cm, be that 5% soda solution soaks 24 hours with mass concentration, take out, keep moisture 10-15%, then by expanded
Equipment bar is carried out expanded, obtain cotton balls shape Caulis et Folium Oryzae cracking fiber；
（2）Count by weight ratio, take walnut shell powder 40-50 part, Caulis et Folium Oryzae cracking fiber 30-40 part, Paris white 4-8 part, water
Solve polyacrylonitrile ammonium salt 1-3 part, impervious agent 10-20 part, carboxymethyl cellulose 5-10 part, redispersable latex powder 5-10 part, change
Property Colophonium 10-20 part, be placed in mixing plant mixing 1-2 hour, constant temperature drying, pelletize at 60 DEG C, mean diameter is 20-
300 mesh, obtain final product drilling fluid pressurization sealing agent.
Described impervious agent is by quick dissolved sodium silicate and aluminium stearate according to 2:3 mass ratio mixes.
Described modified pitch is obtained by following preparation method：First by 360kg water and 22kg dodecyl dimethyl benzyl chloride
After changing ammonium mixing, it is thoroughly mixed to form soap lye through mulser and is heated to 45 DEG C～80 DEG C；Again by the 90# of soap lye and 580kg
Colophonium is crossed colloid mill ground and mixed and is obtained emulsified asphalt, then by this emulsified asphalt and the 38kg liquid fluorine silicon being heated to 30 DEG C～50 DEG C
Rubber mixes rapidly in mixing device, and is sufficiently stirred for, and obtains modified pitch.
Beneficial effects of the present invention are as follows：
1., in the preparation method of sealing agent of the present invention, walnut shell powder, Caulis et Folium Oryzae cracking fiber, modified pitch, Paris white, hydrolysis are poly-
Acrylonitrile ammonium salt, impervious agent, carboxymethyl cellulose and redispersable latex powder are used in conjunction with each other, and it is good to have a plugging effect,
The strong feature of high temperature resistance, high pressure ability it is adaptable to Fractured, solution cavity, broken formation and be difficult determine leak position leakage
Layer leak stopping, and the raw material adopting is mainly plant granule and plant cracking fiber, has cheap, no environmental protection pressure, to brill
The little advantage of the performance impact of well liquid.
2. present invention employs Caulis et Folium Oryzae cracking fiber, this cracking fiber formed when sealing agent uses netted, make closure effect
Fruit is more notable.
3. the present invention passes through to add quick dissolved sodium silicate, aluminium stearate, its quick dissolved sodium silicate and aluminium stearate constantly to tie
Brilliant reaction, forms water-fast crystalline solid, blocks capillary channel so that the impervious leak integrity of sealing agent greatly improves.
4. the modified pitch that the present invention adds has low dynamics viscosity, high cracking resistance energy and excellent dilatancy, can be
Sealing agent forms complete network structure when using, and further increases the plugging effect of sealing agent.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention not limited to this.
Embodiment 1
A kind of preparation method of drilling fluid pressurization sealing agent comprises the following steps：
（1）Extract Caulis et Folium Oryzae cracking fiber first：Straw raw material is carried out with the separation of leaf, bar and fringe, discards Ye Hesui, bar is cut
Become 3-5cm, be that 5% soda solution soaks 24 hours with mass concentration, take out, keep moisture 10-15%, then by expanded
Equipment bar is carried out expanded, obtain cotton balls shape Caulis et Folium Oryzae cracking fiber；
（2）The preparation of modified pitch：
After first 360kg water being mixed with 22kg dodecyl dimethyl benzyl ammonium chloride, it is thoroughly mixed to form soap through mulser
Liquid is simultaneously heated to 65 DEG C；Again the 90# Colophonium of soap lye and 580kg is crossed colloid mill ground and mixed and obtain emulsified asphalt, then by this emulsifying
Colophonium is mixed rapidly in mixing device with the 38kg liquid fluorosilicone rubber being heated to 40 DEG C, and is sufficiently stirred for, and obtains modified pitch；
（3）The drilling fluid preparation of pressurization sealing agent
Count by weight ratio, take 45 parts of walnut shell powder, Caulis et Folium Oryzae 35 parts of fiber of cracking, 6 parts of Paris white, hydrolyzed polyacrylonitrile ammonium
2 parts of salt, 4 parts of quick dissolved sodium silicate, 6 parts of aluminium stearate, 7 parts of carboxymethyl cellulose, 7 parts of redispersable latex powder, modified pitch 15
Part, it is placed in mixing plant and mix 1.5 hours, constant temperature drying, pelletize at 60 DEG C, mean diameter is 20-300 mesh, obtains final product brill
Well liquid pressurization sealing agent.
Embodiment 2
Caulis et Folium Oryzae cracks the preparation such as embodiment 1 of fiber and modified pitch.
The drilling fluid preparation of pressurization sealing agent
Count by weight ratio, take 40 parts of walnut shell powder, Caulis et Folium Oryzae 30 parts of fiber of cracking, 4 parts of Paris white, hydrolyzed polyacrylonitrile ammonium
1 part of salt, 4 parts of quick dissolved sodium silicate, 6 parts of aluminium stearate, 5 parts of carboxymethyl cellulose, 5 parts of redispersable latex powder, modified pitch 10
Part, it is placed in mixing plant and mix 1 hour, constant temperature drying, pelletize at 60 DEG C, mean diameter is 20-300 mesh, obtains final product drilling well
Liquid pressurization sealing agent.
Embodiment 2
Caulis et Folium Oryzae cracks the preparation such as embodiment 1 of fiber and modified pitch.
The drilling fluid preparation of pressurization sealing agent
Count by weight ratio, take 50 parts of walnut shell powder, Caulis et Folium Oryzae 40 parts of fiber of cracking, 8 parts of Paris white, hydrolyzed polyacrylonitrile ammonium
3 parts of salt, 8 parts of quick dissolved sodium silicate, 12 parts of aluminium stearate, 10 parts of carboxymethyl cellulose, 10 parts of redispersable latex powder, modified pitch
20 parts, it is placed in mixing plant and mixes 2 hours, constant temperature drying, pelletize at 60 DEG C, mean diameter is 20-300 mesh, obtains final product brill
Well liquid pressurization sealing agent.
We have done following test to the pressurization sealing agent obtained by embodiment 1：
Application indexes and physical and chemical index such as table 1 below：Wherein standard index is with Q/72084246-4.2-2010 as standard.
Table 1 application indexes and physical and chemical index table
.
By the pressurization sealing agent obtained by embodiment 1 by company standard Q/728084264-4-2001 enter line quality monitoring and
Leak sealing effect and compatibility evaluation experimental, measure it and miss mud amount in calcium soil paste emphasis（ml）With leak sealing time (s), test result
As table 2 below and table 3：
Mud amount missed by table 2（mL）
.
The table 3 leak sealing time（s）
.
Pressurization sealing agent obtained by embodiment 1 is carried out respectively in multiple mud systems compatibility test, compatibility is real
Test table as follows：
Table 4 Experiment of Compatibility table
.
A slurry composition in table 4 includes calcium soil paste, PHP, XY-27, ammonium salt, sulfonated gilsonite, B slurry composition include calcium starching,
FA367、XY-27、SMP.1、NaHPAN；C slurry composition includes sodium soil paste, CUD, CPF, FRH and barium sulfate.
In table 4：P:Density, T：Funnel viscosity（s）, API：Filter loss, K：Cake thickness, PV：Plastic viscosity, YP：Move and cut
Power.
Data in table 4 except leakage mud amount, be 140 DEG C of constant temperature in addition to the leak sealing time, maintenance 16 hours, at 50 DEG C survey
?.
We have also done test same as Example 1, result of the test to the pressurization sealing agent obtained by embodiment 2 and 3
Have no significant difference with the result of the test of embodiment 1, therefore here does not make deposited stating.
Can be seen that this diverting agent is that leak sealing is quick, using efficient, easy construction from the various embodiments described above and test table
The features such as, integrate pressure-bearing, shielding temporarily block up, reservoir protec-tion, leakproof, leak stopping, the new oil gas-bearing formation diverting agent of twice laid
Material.Can be to the environment preferable improvement result of generation, rapid, the effective leak sealing microcrack of energy, the permeability loss on porosity stratum,
Can add in mud with boring, sieve will not be vibrated and sift out, stratum is played with the effect of leakproof, leak stopping.
Secondly, this sealing agent is main raw material(s) using dimension walnut shell powder, Caulis et Folium Oryzae cracking fiber and modified pitch etc., because
This is easily intertwined to form screen cloth, and can form multiple-layer stacked under the pressure reduction of leakage point, compared with similar products, has more
Good economic benefit and practicality, and cost is lower.
Claims (3)
1. a kind of preparation method of drilling fluid pressurization sealing agent is it is characterised in that the method comprises the following steps：
（1）Extract Caulis et Folium Oryzae cracking fiber first：Straw raw material is carried out with the separation of leaf, bar and fringe, discards Ye Hesui, bar is cut
Become 3-5cm, be that 5% soda solution soaks 24 hours with mass concentration, take out, keep moisture 10-15%, then by expanded
Equipment bar is carried out expanded, obtain cotton balls shape Caulis et Folium Oryzae cracking fiber；
（2）Count by weight ratio, take walnut shell powder 40-50 part, Caulis et Folium Oryzae cracking fiber 30-40 part, Paris white 4-8 part, water
Solve polyacrylonitrile ammonium salt 1-3 part, impervious agent 10-20 part, carboxymethyl cellulose 5-10 part, redispersable latex powder 5-10 part, change
Property Colophonium 10-20 part, be placed in mixing plant mixing 1-2 hour, constant temperature drying, pelletize at 60 DEG C, mean diameter is 20-
300 mesh, obtain final product drilling fluid pressurization sealing agent.
2. drilling fluid according to claim 1 with the preparation method of pressurization sealing agent it is characterised in that described impervious agent by
Quick dissolved sodium silicate and aluminium stearate are according to 2:3 mass ratio mixes.
3. drilling fluid according to claim 1 with the preparation method of pressurization sealing agent it is characterised in that described modified pitch
It is obtained by following preparation method：
After first 360kg water being mixed with 22kg dodecyl dimethyl benzyl ammonium chloride, it is thoroughly mixed to form soap through mulser
Liquid is simultaneously heated to 45 DEG C～80 DEG C；Again the 90# Colophonium of soap lye and 580kg is crossed colloid mill ground and mixed and obtain emulsified asphalt, then will
This emulsified asphalt is mixed rapidly in mixing device with the 38kg liquid fluorosilicone rubber being heated to 30 DEG C～50 DEG C, and is sufficiently stirred for,
Obtain modified pitch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610778008.XA CN106398669B (en) | 2016-08-31 | 2016-08-31 | A kind of preparation method of drilling fluid pressurization sealing agent |
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| CN201610778008.XA CN106398669B (en) | 2016-08-31 | 2016-08-31 | A kind of preparation method of drilling fluid pressurization sealing agent |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107033864A (en) * | 2017-05-14 | 2017-08-11 | 石磊 | A kind of preparation method of sealing agent |
| CN107129797A (en) * | 2017-05-11 | 2017-09-05 | 孙东光 | A kind of drilling construction retaining wall construction material and preparation method thereof |
| CN109054780A (en) * | 2018-08-10 | 2018-12-21 | 西南石油大学 | A kind of crack inhibitor and preparation method thereof improving formation fracture pressure and water-base drilling fluid and application |
| CN110088226A (en) * | 2016-12-19 | 2019-08-02 | 沙特阿拉伯石油公司 | The bicomponent fibre mixture based on jujube tree waste material controlled for middle leakage to severe circulation loss |
| CN110105934A (en) * | 2019-04-19 | 2019-08-09 | 河南省遨太化工有限公司 | A kind of drilling fluid acid-soluble pressurization sealing agent and preparation method |
| CN110872496A (en) * | 2018-09-04 | 2020-03-10 | 中石化石油工程技术服务有限公司 | Plugging agent for well drilling and application thereof |
| CN112745817A (en) * | 2019-10-30 | 2021-05-04 | 中国石油化工股份有限公司 | Plugging agent for drilling fluid and application |
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| CN1432620A (en) * | 2002-01-14 | 2003-07-30 | 中国石油化工股份有限公司 | Temporary leakage-stopping agent for well drilling shielding and its application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110088226A (en) * | 2016-12-19 | 2019-08-02 | 沙特阿拉伯石油公司 | The bicomponent fibre mixture based on jujube tree waste material controlled for middle leakage to severe circulation loss |
| CN107129797A (en) * | 2017-05-11 | 2017-09-05 | 孙东光 | A kind of drilling construction retaining wall construction material and preparation method thereof |
| CN107033864A (en) * | 2017-05-14 | 2017-08-11 | 石磊 | A kind of preparation method of sealing agent |
| CN109054780A (en) * | 2018-08-10 | 2018-12-21 | 西南石油大学 | A kind of crack inhibitor and preparation method thereof improving formation fracture pressure and water-base drilling fluid and application |
| CN110872496A (en) * | 2018-09-04 | 2020-03-10 | 中石化石油工程技术服务有限公司 | Plugging agent for well drilling and application thereof |
| CN110105934A (en) * | 2019-04-19 | 2019-08-09 | 河南省遨太化工有限公司 | A kind of drilling fluid acid-soluble pressurization sealing agent and preparation method |
| CN114395384A (en) * | 2019-04-19 | 2022-04-26 | 河南省遨太化工有限公司 | Acid-soluble pressure-bearing plugging agent for drilling fluid and preparation method thereof |
| CN112745817A (en) * | 2019-10-30 | 2021-05-04 | 中国石油化工股份有限公司 | Plugging agent for drilling fluid and application |
| CN112745817B (en) * | 2019-10-30 | 2022-10-11 | 中国石油化工股份有限公司 | Plugging agent for drilling fluid and application |
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|---|---|
| CN106398669B (en) | 2018-09-25 |
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