CN105419749A - Starch filtrate reducer for drilling fluid and preparing method thereof - Google Patents
Starch filtrate reducer for drilling fluid and preparing method thereof Download PDFInfo
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- CN105419749A CN105419749A CN201510794742.0A CN201510794742A CN105419749A CN 105419749 A CN105419749 A CN 105419749A CN 201510794742 A CN201510794742 A CN 201510794742A CN 105419749 A CN105419749 A CN 105419749A
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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
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Abstract
The invention discloses a starch filtrate reducer for drilling fluid and a preparing method thereof. The starch filtrate reducer for the drilling fluid is prepared from, by mass, 90-99 parts of starch, 0-5 parts of high-temperature stabilizer and 1-5 parts of alkalinity modifier, wherein the starch comprises one or more of potato starch, tapioca starch, canna edulis ker starch and colocasia esculenta starch. The starch filtrate reducer for the drilling fluid has the advantages of being good in filtrate reducing effect, good in reservoir protection effect, capable of being liquefied and the like; a reservoir stratum section drilling fluid system prepared from the starch filtrate reducer has automatic flowback performance, liquefiable performance and the like, has no harm to a reservoir stratum, and is beneficial for protecting the reservoir stratum.
Description
Technical field
The present invention relates to a kind of drilling fluid starch fluid loss agent, particularly relate to a kind of drilling fluid starch fluid loss agent and preparation method thereof.
Background technology
Drilling fluid is a kind of important fluid in drilling engineering, and it is directly connected to the Safety and Quality of drilling well, more plays vital effect to the efficiency of an oil extraction in oil field with height.Drilling fluid filtration is excessive is one of major reason causing borehole well instability and reservoir protection; especially in horizontal well bore hole drilling process, the reservoir protection of drilling fluid is extremely important; often determine that an oil field whether can economic development, and the quality of filtrate reducer for drilling fluid to reservoir protection plays critical effect.
In filtrate reducer for drilling fluid conventional at present, only starch and treated starch fluid loss agent can meet the basic demand of reservoir protection, but the treated starches such as ative starch common on market, pre-gelatinized starch, cross-linking starch, graft starch cannot meet the requirement of drilling fluid to reservoir protection completely.
Summary of the invention
The technical problem to be solved in the present invention is, provides that a kind of filtrate reducing is effective, reservoir protection is effective and liquable drilling fluid starch fluid loss agent and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of drilling fluid starch fluid loss agent, comprise the raw material of following mass fraction: starch 90 ~ 99 parts, high-temperature stabiliser 0 ~ 5 part and alkalinity regulator 1 ~ 5 part; Wherein, described starch comprises one or more in yam starch, tapioca (flour), canna starch and yam betel starch.
Preferably, described starch comprises the starch of following mass fraction: yam starch 60 ~ 80 parts, tapioca (flour) 10 ~ 30 parts, canna starch 0 ~ 20 part and yam betel starch 0 ~ 20 part.
Preferably, described high-temperature stabiliser comprises at least one in S-WAT, thanomin, thiocarbamide.
Preferably, described alkalinity regulator comprises at least one in sodium hydroxide, sodium carbonate, potassium hydroxide, salt of wormwood and magnesium oxide.
The present invention also provides a kind of preparation method of above-mentioned drilling fluid starch fluid loss agent, comprises the following steps:
Each raw material is taken by mass fraction;
Each raw material is mixed, obtains drilling fluid starch fluid loss agent.
The present invention also provides the preparation method of another kind of above-mentioned drilling fluid starch fluid loss agent, comprises the following steps:
With slurry: to load appropriate water with container, measure to be 100 parts with the total mass number of water, add the starch of 20 ~ 30 parts, more proportionally add high-temperature stabiliser and alkalinity regulator successively, be mixed to form slurry;
Gelatinization is extruded: the slurry prepared is injected extruser and carries out high temperature gelatinization, the starch of gelatinization in slurry extrudes rear moment explosion puffing drying from described extruser outlet, again by the starch after expanded through coarse crushing and fine grinding, sieve, i.e. obtained drilling fluid starch fluid loss agent.
Preferably, in described gelatinization extrusion step, control gelatinization point at 90 ~ 140 DEG C.
Preferably, in described gelatinization extrusion step, 100 mesh sieves are adopted to sieve.
Drilling fluid starch fluid loss agent of the present invention, has the features such as filtrate reducing is effective, reservoir protection is effective, liquefiable; With the Reservoir Section drilling fluid system of this starch fluid loss agent preparation, there is the performance such as the row of returning and liquefiable automatically, to reservoir without any injury, be conducive to protecting reservoir.Drilling fluid with the preparation method of starch fluid loss agent and technique simple, production cost is low, easy to implement and promote, and has broad application prospects in Reservoir Section drilling fluid.
Embodiment
Drilling fluid starch fluid loss agent of the present invention, comprises the raw material of following mass fraction: starch 90 ~ 99 parts, high-temperature stabiliser 0 ~ 5 part and alkalinity regulator 1 ~ 5 part.
Wherein, starch comprises one or more in yam starch, tapioca (flour), canna starch and yam betel starch.
Preferably, in raw material, starch comprises the starch of following mass fraction: yam starch 60 ~ 80 parts, tapioca (flour) 10 ~ 30 parts, canna starch 0 ~ 20 part and yam betel starch 0 ~ 20 part.Starch, after composite, all can improve filtration property and the reservoir protection performance of drilling fluid from size distribution to starch attribute.
High-temperature stabiliser comprises at least one in S-WAT, thanomin, thiocarbamide.
Alkalinity regulator comprises at least one in sodium hydroxide, sodium carbonate, potassium hydroxide, salt of wormwood and magnesium oxide.
The preparation method of above-mentioned drilling fluid starch fluid loss agent one embodiment, comprises the following steps:
Each raw material is taken by mass fraction;
Each raw material is mixed, obtains drilling fluid starch fluid loss agent.Mixing can be carried out in kneader.
The preparation method of above-mentioned another embodiment of drilling fluid starch fluid loss agent, comprises the following steps:
With slurry: to load appropriate water with container, measure to be 100 parts with the total mass number of water, add the starch of 20 ~ 30 parts, more proportionally add high-temperature stabiliser and alkalinity regulator successively, be mixed to form slurry.In this step with slurry, the starch quality number added is 20 ~ 30 parts, and is 90 ~ 99 parts in starch fluid loss agent raw material.Such as, the starch of 20 ~ 30 parts is added in the water of mass fraction 70 ~ 80 parts.
Gelatinization is extruded: the slurry prepared is injected extruser and carries out high temperature gelatinization, the starch of gelatinization in slurry extrudes rear moment explosion puffing drying from described extruser outlet, again by the starch after expanded through coarse crushing and fine grinding, sieve, i.e. obtained drilling fluid starch fluid loss agent.
In gelatinization extrusion step, control gelatinization point at 90 ~ 140 DEG C; 100 mesh sieves are adopted to sieve.
With specific embodiment, the present invention is further described below.
Embodiment 1:
Take the raw material of following mass fraction: yam starch 70 parts, tapioca (flour) 20 parts, canna starch 7 parts and 3 parts, magnesium oxide.
Kneader is adopted to mix and obtain drilling fluid starch fluid loss agent.
Embodiment 2:
Take the raw material of following mass fraction: yam starch 60 parts, tapioca (flour) 30 parts, canna starch 5 parts, yam betel starch 7 parts, 5 parts, magnesium oxide.
Kneader is adopted to mix and obtain drilling fluid starch fluid loss agent.
Embodiment 3:
Take the raw material of following mass fraction: yam starch 80 parts, tapioca (flour) 10 parts, canna starch 9 parts, 1 part, sodium carbonate.
Kneader is adopted to mix and obtain drilling fluid starch fluid loss agent.
Embodiment 4:
Take the raw material of following mass fraction: yam starch 60 parts, tapioca (flour) 10 parts, canna starch 9 parts, yam betel starch 20 parts, 1 part, magnesium oxide.
Kneader is adopted to mix and obtain drilling fluid starch fluid loss agent.
Embodiment 5:
Raw material is by following mass fraction metering: yam starch 65 parts, tapioca (flour) 9 parts, canna starch 20 parts, S-WAT 5 parts, 1 part, potassium hydroxide.Be 70 parts of meterings by water, above-mentioned each raw material is multiplied by 0.3 mass fraction obtaining being added to the water on metering number.
Preparation: load 70 parts of water with container, then add yam starch 19.5 parts, tapioca (flour) 2.7 parts, canna starch 6 parts, S-WAT 1.5 parts, 0.3 part, potassium hydroxide successively, mix formation slurry; The slurry prepared is injected extruser, control gelatinization point at 90-140 DEG C, starch extrudes rear moment explosion puffing drying from extruser outlet, then by the starch after expanded through coarse crushing and fine grinding, cross 100 mesh sieves, i.e. obtained drilling fluid starch fluid loss agent.
Embodiment 6:
Raw material is by following mass fraction metering: yam starch 70 parts, tapioca (flour) 20 parts, yam betel starch 7 parts, S-WAT 2 parts.Be 70 parts of meterings by water, above-mentioned each raw material is multiplied by 0.3 mass fraction obtaining being added to the water on metering number.
Take the raw material of following mass fraction: yam starch 70 parts, tapioca (flour) 20 parts, canna starch 20 parts, S-WAT 5 parts, 1 part, potassium hydroxide.
Preparation: load 70 parts of water with container, then add yam starch 21 parts, tapioca (flour) 6 parts, yam betel starch 2.1 parts, S-WAT 0.6 part, 0.3 part, potassium hydroxide successively, mix formation slurry; The slurry prepared is injected extruser, control gelatinization point at 90-140 DEG C, starch extrudes rear moment explosion puffing drying from extruser outlet, then by the starch after expanded through coarse crushing and fine grinding, cross 100 mesh sieves, i.e. obtained drilling fluid starch fluid loss agent.
Embodiment 7:
Raw material is by following mass fraction metering: yam starch 75 parts, tapioca (flour) 15 parts, canna starch 5 parts, 2 parts, sodium hydroxide, thanomin 3 parts.Be 75 parts of meterings by water, above-mentioned each raw material is multiplied by 0.25 mass fraction obtaining being added to the water on metering number.
Preparation: load 75 parts of water with container, then add yam starch 18.75 parts, tapioca (flour) 3.75 parts, canna starch 1.25 parts, 0.5 part, sodium hydroxide, thanomin 0.75 part successively, mix formation slurry; The slurry prepared is injected extruser, control gelatinization point at 90-140 DEG C, starch extrudes rear moment explosion puffing drying from extruser outlet, then by the starch after expanded through coarse crushing and fine grinding, cross 100 mesh sieves, i.e. obtained drilling fluid starch fluid loss agent.
Starch fluid loss agent obtained by above-described embodiment 1-7 is tested as follows:
1) starch fluid loss agent is tested separately: the main acid-soluble ratio of test starch fluid loss agent and the performance in typical well liquid.Result is as follows:
Table 1. starch fluid loss agent single dose test result
| Starch fluid loss agent | Acid-soluble ratio (%) |
| Embodiment 1 | 100 |
| Embodiment 2 | 100 |
| Embodiment 3 | 100 3 --> |
| Embodiment 4 | 100 |
| Embodiment 5 | 100 |
| Embodiment 6 | 100 |
| Embodiment 7 | 100 |
| W-Gum | 12.5 |
| Cross-linking starch | 0 |
From table 1 data, the starch fluid loss agent acid-soluble ratio obtained by the present invention all reaches 100%.
The test result of table 2. starch fluid loss agent in typical well liquid
From table 2 data, the starch fluid loss agent obtained by the present invention has good filtrate reducing effect in typical well liquid, and on system viscosity without impact.
2) test of starch fluid loss agent in Reservoir Section drilling fluid:
Drilling fluid composition (mass percent): seawater+0.1% sodium hydroxide+0.2% sodium carbonate+0.5%VIS+2.0% starch fluid loss agent+5% calcium carbonate.
Typical well liquid (mass percent): seawater+0.1% sodium hydroxide+0.2% sodium carbonate+0.5%VIS+2.0% cross-linking starch+5% calcium carbonate.
By above-mentioned formulated drilling fluid, record performance as following table.
Table 3. testing performance of drilling fluid result
| Drilling fluid | T | AV | PV | YP | LSRV | API | SRL | K |
| Embodiment 1 | 130 | 25 | 13 | 12 | 21354 | 4.6 | 100 | 93.4 4 --> |
| Embodiment 2 | 120 | 28 | 14 | 14 | 23618 | 4.4 | 100 | 91.8 |
| Embodiment 3 | 100 | 33 | 17 | 16 | 22302 | 3.2 | 100 | 93.2 |
| Embodiment 4 | 130 | 38 | 17 | 21 | 28000 | 5.2 | 100 | 96.7 |
| Embodiment 5 | 110 | 30 | 16 | 14 | 22036 | 4.2 | 100 | 93.8 |
| Embodiment 6 | 130 | 33 | 15 | 17 | 25000 | 5.0 | 100 | 95.3 |
| Embodiment 7 | 140 | 28 | 14 | 14 | 20213 | 5.6 | 100 | 90.7 |
| Typical well liquid | 120 | 35 | 20 | 15 | 46785 | 6.3 | 45.3 | 68.5 |
Note:
T: drilling fluid aging temperature, DEG C;
AV: drilling fluid apparent viscosity, mPas;
PV: drilling fluid plastic viscosity, mPas;
YP: drilling fluid yield value, Pa;
LSRV: low-shear rate viscosity, mPas;
API: press dehydration (0.7MPa, room temperature, 30min) in drilling fluid, mL;
SRL: the corrosion rate of drilling fluid mud cake, %;
K: the permeability resume figure on rock core after displacement employing well finishing liquid completion, %.
From table 3 data, adopt the drilling fluid that starch fluid loss agent of the present invention is prepared, can be consistent with typical well fluidity in rheological, illustrate that starch fluid loss agent of the present invention can meet drilling well requirement; The acid-soluble ratio of mud cake reaches 100%, and typical well liquid is only 45%, is obviously better than typical well liquid; Permeability resume figure reaches more than 90%, and reservoir damage is less than 10%, and the permeability resume figure of typical well liquid is only 68%, and reservoir damage reaches more than 30%.
In sum, starch fluid loss agent of the present invention have that filtrate reducing is effective, compatibleness good, can natural degradation and liquefiable and the feature such as environmentally friendly.The Reservoir Section drilling fluid system adopting it to prepare has the directly row of returning and liquable function, to reservoir without any injury, is conducive to protecting reservoir, improves field output; Except for except Reservoir Section drilling fluid, also good with the drilling fluid system compatibleness of other type and well section, there is good filtrate reducing effect, there is the broad spectrum of application; Preparation method is simple, and production cost is low, and easy to implement and popularization, has broad application prospects in Reservoir Section drilling fluid.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a drilling fluid starch fluid loss agent, is characterized in that, comprises the raw material of following mass fraction: starch 90 ~ 99 parts, high-temperature stabiliser 0 ~ 5 part and alkalinity regulator 1 ~ 5 part; Wherein, described starch comprises one or more in yam starch, tapioca (flour), canna starch and yam betel starch.
2. drilling fluid starch fluid loss agent according to claim 1, it is characterized in that, described starch comprises the starch of following mass fraction: yam starch 60 ~ 80 parts, tapioca (flour) 10 ~ 30 parts, canna starch 0 ~ 20 part and yam betel starch 0 ~ 20 part.
3. drilling fluid starch fluid loss agent according to claim 1, it is characterized in that, described high-temperature stabiliser comprises at least one in S-WAT, thanomin, thiocarbamide.
4. drilling fluid starch fluid loss agent according to claim 1, it is characterized in that, described alkalinity regulator comprises at least one in sodium hydroxide, sodium carbonate, potassium hydroxide, salt of wormwood and magnesium oxide.
5. the preparation method for starch fluid loss agent of the drilling fluid described in any one of claim 1-4, is characterized in that, comprise the following steps:
Each raw material is taken by mass fraction;
Each raw material is mixed, obtains drilling fluid starch fluid loss agent.
6. the preparation method for starch fluid loss agent of the drilling fluid described in any one of claim 1-4, is characterized in that, comprise the following steps:
With slurry: to load appropriate water with container, measure to be 100 parts with the total mass number of water, add the starch of 20 ~ 30 parts, more proportionally add high-temperature stabiliser and alkalinity regulator successively, be mixed to form slurry;
Gelatinization is extruded: the slurry prepared is injected extruser and carries out high temperature gelatinization, the starch of gelatinization in slurry extrudes rear moment explosion puffing drying from described extruser outlet, again by the starch after expanded through coarse crushing and fine grinding, sieve, i.e. obtained drilling fluid starch fluid loss agent.
7. the preparation method of drilling fluid starch filtrate reducing according to claim 6, is characterized in that, in described gelatinization extrusion step, controls gelatinization point at 90 ~ 140 DEG C.
8. the preparation method of drilling fluid starch filtrate reducing according to claim 6, is characterized in that, in described gelatinization extrusion step, adopts 100 mesh sieves to sieve.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106279709A (en) * | 2016-08-10 | 2017-01-04 | 吴迪 | A kind of method utilizing amylose and sulfonated wheat-strew lignin to prepare fluid loss additive |
| CN108531149A (en) * | 2018-05-31 | 2018-09-14 | 中国海洋石油集团有限公司 | A kind of water base drilling liquid and its preparation method and application |
| CN109652027A (en) * | 2018-12-18 | 2019-04-19 | 中国石油集团川庆钻探工程有限公司 | Method for improving high-temperature stability of polymer drilling fluid |
| CN109825266A (en) * | 2017-11-23 | 2019-05-31 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | A kind of high inhibition height blocks double guarantor's type drilling fluids and preparation method thereof, drilling composition |
| CN111057160A (en) * | 2019-12-27 | 2020-04-24 | 河南新孚望新材料科技有限公司 | Preparation method of high amylose starch for fluid loss additive |
| CN112010987A (en) * | 2020-09-07 | 2020-12-01 | 中国石油集团渤海钻探工程有限公司 | Inorganic modified starch filtrate reducer for drilling fluid and preparation method thereof |
| CN113088266A (en) * | 2019-12-23 | 2021-07-09 | 中石化南京化工研究院有限公司 | High-performance environment-friendly drilling fluid |
| CN114891490A (en) * | 2022-03-24 | 2022-08-12 | 长江大学 | High-temperature-resistant biodegradable water-based drilling fluid |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106279709A (en) * | 2016-08-10 | 2017-01-04 | 吴迪 | A kind of method utilizing amylose and sulfonated wheat-strew lignin to prepare fluid loss additive |
| CN109825266A (en) * | 2017-11-23 | 2019-05-31 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | A kind of high inhibition height blocks double guarantor's type drilling fluids and preparation method thereof, drilling composition |
| CN108531149A (en) * | 2018-05-31 | 2018-09-14 | 中国海洋石油集团有限公司 | A kind of water base drilling liquid and its preparation method and application |
| CN109652027A (en) * | 2018-12-18 | 2019-04-19 | 中国石油集团川庆钻探工程有限公司 | Method for improving high-temperature stability of polymer drilling fluid |
| CN113088266A (en) * | 2019-12-23 | 2021-07-09 | 中石化南京化工研究院有限公司 | High-performance environment-friendly drilling fluid |
| CN111057160A (en) * | 2019-12-27 | 2020-04-24 | 河南新孚望新材料科技有限公司 | Preparation method of high amylose starch for fluid loss additive |
| CN112010987A (en) * | 2020-09-07 | 2020-12-01 | 中国石油集团渤海钻探工程有限公司 | Inorganic modified starch filtrate reducer for drilling fluid and preparation method thereof |
| CN114891490A (en) * | 2022-03-24 | 2022-08-12 | 长江大学 | High-temperature-resistant biodegradable water-based drilling fluid |
| CN114891490B (en) * | 2022-03-24 | 2023-09-22 | 长江大学 | High-temperature-resistant biodegradable water-based drilling fluid |
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Application publication date: 20160323 |