CN105331339A - Sodium silicate containing polyalcohol drilling fluid for offshore drilling - Google Patents
Sodium silicate containing polyalcohol drilling fluid for offshore drilling Download PDFInfo
- Publication number
- CN105331339A CN105331339A CN201510794945.XA CN201510794945A CN105331339A CN 105331339 A CN105331339 A CN 105331339A CN 201510794945 A CN201510794945 A CN 201510794945A CN 105331339 A CN105331339 A CN 105331339A
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- Prior art keywords
- drilling fluid
- water glass
- drilling
- seawater
- fluid
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Classifications
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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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
-
- 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
Abstract
The invention relates to a sodium silicate containing polyalcohol drilling fluid for offshore drilling. The drilling fluid is prepared from seawater, bentonite, sodium carbonate, a tackifier, a filtrate reducer and an inhibitor in weight part ratio. The drilling fluid is a high-blocking type drilling fluid which has higher inhibitive ability and lubricity and is suitable for being used for offshore drilling, is simple to prepare and is easily operated for site operation.
Description
Technical field
The present invention relates to a kind of drilling fluid, particularly relate to a kind of marine drilling water glass polyglycol drilling fluid.
Background technology
Along with constantly carrying out of the Reservoir Development to land and ocean, make a general survey of the research of domestic and international many decades drilling fluid, development and application situation can find that the subject matter that Offshore drilling fluid faces has: the high wilkinite that makes of seawater salinity is not easily with slurry in the seawater; The dispersion of solid phase fine particle aquation causes drilling fluid consumption large; Drilling fluid rheology difference causes well to clean difficulty, and rock particles aquation causes hole instability.
Summary of the invention
For the problems referred to above, the invention provides a kind of drilling fluid, this drilling fluid has good inhibition, seal-off effect and oilness, is applicable to the use in marine drilling process.
The technical solution adopted for the present invention to solve the technical problems is:
This drilling fluid comprises seawater, wilkinite, sodium carbonate, tackifier, fluid loss agent and inhibitor, and its ratio of weight and number is, 400mL seawater: wilkinite: sodium carbonate: tackifier: fluid loss agent: inhibitor=100:3-8:3-8:0.1-0.7:0.5-1:5-10.
The ratio of weight and number of described seawater, wilkinite, sodium carbonate, tackifier, fluid loss agent and inhibitor is, 400mL seawater: wilkinite: sodium carbonate: tackifier: fluid loss agent: inhibitor=100:5:5:0.4:0.7:8.
Described tackifier are PAC142.
Described fluid loss agent is valchovite.
Described inhibitor is water glass and polyoxyethylene glycol, and the ratio of weight and number of water glass and polyoxyethylene glycol is, water glass: polyoxyethylene glycol=3:5.
This drilling fluid also comprises NaOH, and NaOH regulates pH to 12.
Drilling fluid provided by the invention has the following advantages: the water glass polyglycol drilling fluid of development can adopt seawater directly with slurry, in Offshore drilling fluid, can fetch water on the spot, save drilling cost in a large number; Drilling fluid system has good rheological, can meet the requirement of marine drilling to drilling fluid rheology completely; The filter loss change of the aging front and back of this drilling fluid is little, can be used for the marine drilling of high pulping; Adding of water glass makes this drilling fluid system have good high inhibition seal-off effect, and water glass can form gel and precipitate the crack blocked in well; Water glass effectively can suppress shale CLAY MINERALS AND THEIR SIGNIFICANCE hydration swelling; Adding of polymeric alcohol makes the inhibition of this drilling fluid system promote further, with water glass collaborate, makes this drilling fluid system have high seal-off effect, highly inhibited.Because this drilling fluid adopts seawater directly with slurry, make Ca
2+, Mg
2+the impact of ion pair drilling fluid is reduced to minimum, and therefore this drilling fluid has salt resistance.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, invention is further illustrated.
Fig. 1 is that seawater water glass polyglycol drilling fluid heat rolls front and back rate of expansion comparison diagram.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
Embodiment 1
1. the preparation method of a marine drilling water glass polyglycol drilling fluid and basic rheological parameter are measured.
(1) its preparation method is as follows:
This drilling fluid comprises seawater, wilkinite, sodium carbonate, tackifier, fluid loss agent and inhibitor, and its ratio of weight and number is, 400mL seawater: wilkinite: sodium carbonate: tackifier: fluid loss agent: inhibitor=100:5:5:0.4:0.7:8.
1) first according to said ratio, appropriate seawater, wilkinite, tackifier, fluid loss agent, inhibitor and auxiliary agent is taken.
2) add 400ml seawater in a reservoir, under 10000r/min speed conditions, then add 5% wilkinite, 5%Na successively
2cO
3, 0.4%PAC142,0.7% valchovite, 3% water glass, NaOH regulate pH to 12,5% polyoxyethylene glycol, namely obtains water glass polyglycol drilling fluid after fully stirring.
(2) measurement of basic rheological parameter.
Mesosilicic acid sodium polymerization alcohol drilling fluid fundamental performance parameter of the present invention, data are in table 1.
No. 1 drilling fluid is the seawater water glass polyglycol drilling fluid of this experiment development, No. 2 is conventional Offshore drilling fluid, by experiment data we can find out, the drilling fluid of this experiment development has certain thermostability, the rheological change of aging front and back is little, apparent viscosity is 30.4AVmPas, and plastic viscosity is 20.3AVmPas, and yield value is 13.1Pa.Compare conventional Offshore drilling fluid, the apparent viscosity of aging front and back, plastic viscosity, yield value and filter loss are all better than this conventional Offshore drilling fluid.
2. dehydration wall building (filter loss) performance evaluation
The dehydration building capacity of research seawater water glass polyglycol drilling fluid, data are in table 2.
By experiment data we can find out, this drilling fluid 16 hours, the filter loss change of 80 DEG C of aging front and back is little, and illustrate that this drilling fluid has certain stability, hmc is only 0.5mm.
3. the rolling rate of recovery
The rolling rate of recovery of test seawater water glass polyglycol drilling fluid, data are in table 3.
No. 1 drilling fluid is the seawater water glass polyglycol drilling fluid of this experiment development, No. 2 is conventional Offshore drilling fluid, by experiment data we can find out, compare clear water and conventional Offshore drilling fluid, the drilling fluid of this experiment development has good inhibition, and the rolling rate of recovery is up to 87.5%.
4. suppress shale expansion
Shale expansion change curve as shown in Figure 1.
By experiment data we can find out, through 16 hours, though 80 DEG C of aging rear rate of expansion increase to some extent, but in tolerance interval, wellbore fluid reveal highly inhibited may be because polymeric alcohol and silicate coefficient, be that the inhibition of drilling fluid strengthens greatly, shale expansion rate is 0.44%, and it is 0.86% that heat rolls rear shale expansion rate.
5. antifouling property evaluation
Probe into the impact of different inorganic salt on seawater water glass polyglycol drilling fluid rheological and filter loss as table 4.
Data show by experiment, in drilling fluid system, add CaCl
2and MgCl
2, find that this drilling fluid system has certain anti-salt effect after the viscosity of measurement drilling fluid and filter loss, this may be because this experiment adopts seawater prepared bentonite drilling fluid, contains corresponding ion, make the impact of this ion pair drilling fluid negligible in synthetic sea water; And in the deterministic process of water glass dosage, add adding to react to generate with some ion and precipitating of a certain amount of NaOH, NaOH, directly eliminate the impact of this ion pair drilling fluid.
Embodiment 2
This drilling fluid comprises seawater, wilkinite, sodium carbonate, tackifier, fluid loss agent and inhibitor, and its ratio of weight and number is, 400mL seawater: wilkinite: sodium carbonate: tackifier: fluid loss agent: inhibitor=100:3:3:0.1:0.5:5.
Described tackifier are PAC142.Described fluid loss agent is valchovite.Described inhibitor is water glass and polyoxyethylene glycol, and the ratio of weight and number of water glass and polyoxyethylene glycol is, water glass: polyoxyethylene glycol=3:5.This drilling fluid also comprises NaOH, and NaOH regulates pH to 12.The other the same as in Example 1.
Embodiment 3
This drilling fluid comprises seawater, wilkinite, sodium carbonate, tackifier, fluid loss agent and inhibitor, and its ratio of weight and number is, 400mL seawater: wilkinite: sodium carbonate: tackifier: fluid loss agent: inhibitor=100:8:8:0.7:1:10.
Described tackifier are PAC142.Described fluid loss agent is valchovite.Described inhibitor is water glass and polyoxyethylene glycol, and the ratio of weight and number of water glass and polyoxyethylene glycol is, water glass: polyoxyethylene glycol=3:5.This drilling fluid also comprises NaOH, and NaOH regulates pH to 12.The other the same as in Example 1.
Embodiment 4
This drilling fluid comprises seawater, wilkinite, sodium carbonate, tackifier, fluid loss agent and inhibitor, and its ratio of weight and number is, 400mL seawater: wilkinite: sodium carbonate: tackifier: fluid loss agent: inhibitor=100:3:8:0.7:0.5:10.
Described tackifier are PAC142.Described fluid loss agent is valchovite.Described inhibitor is water glass and polyoxyethylene glycol, and the ratio of weight and number of water glass and polyoxyethylene glycol is, water glass: polyoxyethylene glycol=3:5.This drilling fluid also comprises NaOH, and NaOH regulates pH to 12.The other the same as in Example 1.
The rheological of table 1 seawater water glass polyglycol drilling fluid
The dehydration building capacity of table 2 seawater water glass polyglycol drilling fluid
The rolling rate of recovery of table 3 seawater water glass polyglycol drilling fluid
The different inorganic salt of table 4 are on the impact of seawater water glass polyglycol drilling fluid rheological and filter loss
Claims (6)
1. a marine drilling water glass polyglycol drilling fluid, it is characterized in that comprising seawater, wilkinite, sodium carbonate, tackifier, fluid loss agent and inhibitor, its ratio of weight and number is, 400mL seawater: wilkinite: sodium carbonate: tackifier: fluid loss agent: inhibitor=100:3-8:3-8:0.1-0.7:0.5-1:5-10.
2. a kind of marine drilling water glass polyglycol drilling fluid according to claim 1, it is characterized in that the ratio of weight and number of described seawater, wilkinite, sodium carbonate, tackifier, fluid loss agent and inhibitor is, 400mL seawater: wilkinite: sodium carbonate: tackifier: fluid loss agent: inhibitor=100:5:5:0.4:0.7:8.
3. a kind of marine drilling water glass polyglycol drilling fluid according to claim 1 and 2, is characterized in that described tackifier are PAC142.
4. a kind of marine drilling water glass polyglycol drilling fluid according to claim 1 and 2, is characterized in that described fluid loss agent is valchovite.
5. a kind of marine drilling water glass polyglycol drilling fluid according to claim 1 and 2, is characterized in that described inhibitor is water glass and polyoxyethylene glycol, and the ratio of weight and number of water glass and polyoxyethylene glycol is, water glass: polyoxyethylene glycol=3:5.
6. a kind of marine drilling water glass polyglycol drilling fluid according to claim 1 and 2, it is characterized in that this drilling fluid also comprises NaOH, NaOH regulates pH to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510794945.XA CN105331339A (en) | 2015-11-18 | 2015-11-18 | Sodium silicate containing polyalcohol drilling fluid for offshore drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510794945.XA CN105331339A (en) | 2015-11-18 | 2015-11-18 | Sodium silicate containing polyalcohol drilling fluid for offshore drilling |
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| CN105331339A true CN105331339A (en) | 2016-02-17 |
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| CN201510794945.XA Pending CN105331339A (en) | 2015-11-18 | 2015-11-18 | Sodium silicate containing polyalcohol drilling fluid for offshore drilling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430510A (en) * | 2016-07-29 | 2017-02-22 | 北京嘉禾天华节能环保科技有限公司 | Reagent for preparing reusing petroleum drilling wastewater into slurry for reuse and application thereof |
| CN110564380A (en) * | 2019-09-28 | 2019-12-13 | 中国石油集团川庆钻探工程有限公司钻井液技术服务公司 | Inhibitor for drilling fluid and preparation method thereof |
| CN115028341A (en) * | 2022-04-25 | 2022-09-09 | 北京中科日升科技有限公司 | Solid-liquid separation and reuse method for waste water-based mud |
Citations (2)
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| CN101294070A (en) * | 2008-06-04 | 2008-10-29 | 中国海洋石油总公司 | Sea water silicate drilling fluids |
| CN102391843A (en) * | 2011-12-01 | 2012-03-28 | 西南石油大学 | Potassium metasilicate polymeric alcohol water base drilling fluid |
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2015
- 2015-11-18 CN CN201510794945.XA patent/CN105331339A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101294070A (en) * | 2008-06-04 | 2008-10-29 | 中国海洋石油总公司 | Sea water silicate drilling fluids |
| CN102391843A (en) * | 2011-12-01 | 2012-03-28 | 西南石油大学 | Potassium metasilicate polymeric alcohol water base drilling fluid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430510A (en) * | 2016-07-29 | 2017-02-22 | 北京嘉禾天华节能环保科技有限公司 | Reagent for preparing reusing petroleum drilling wastewater into slurry for reuse and application thereof |
| CN110564380A (en) * | 2019-09-28 | 2019-12-13 | 中国石油集团川庆钻探工程有限公司钻井液技术服务公司 | Inhibitor for drilling fluid and preparation method thereof |
| CN115028341A (en) * | 2022-04-25 | 2022-09-09 | 北京中科日升科技有限公司 | Solid-liquid separation and reuse method for waste water-based mud |
| CN115028341B (en) * | 2022-04-25 | 2023-11-28 | 北京中科日升科技有限公司 | Solid-liquid separation recycling method for waste water-based slurry |
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Application publication date: 20160217 |
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