CN109652033A - A kind of Biodegradable environment protection high inhibition drilling fluid and preparation method thereof - Google Patents
A kind of Biodegradable environment protection high inhibition drilling fluid and preparation method thereof Download PDFInfo
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- CN109652033A CN109652033A CN201910067708.1A CN201910067708A CN109652033A CN 109652033 A CN109652033 A CN 109652033A CN 201910067708 A CN201910067708 A CN 201910067708A CN 109652033 A CN109652033 A CN 109652033A
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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
- C09K8/035—Organic additives
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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
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- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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Abstract
The present invention relates to a kind of Biodegradable environment protection high inhibition drilling fluids and preparation method thereof for shale formation oil and gas development drilling shale, it overcomes the problems, such as borehole well instability, and shale formation aquation is inhibited to collapse.Also show the degradable advantage of hypotoxicity.Its technical solution is that prepare the raw materials used component of the drilling fluid and its content be gram: 1000 parts by weight of deionized water；Drilling fluid bentonite 30-60 parts by weight；Glycyrrhizin 20-60 parts by weight；Sodium chloride 80-90 parts by weight；Carboxymethyl starch CMS 6-10 parts by weight；Polyanion cellulose PAC-LV 6-10 parts by weight；Partially hydrolyzed polyacrylamide (PHPA) PHP 2-6 parts by weight；Xanthan gum 2-6 parts by weight；The PH for adding 5-10 parts by weight NaOH aqueous solution regulation system is 9-10, and it is 1.1-1.4g/cm that 300-800 drilling fluid, which is added, and stirs 1 hour adjusting density with heavy weight additive barite3It is finally made the drilling fluid system of shut-off capacity with preferable inhibition, is used for shale formation.
Description
Technical field
The present invention relates to drilling fluid fields, and in particular to a kind of Biodegradable environment protection high inhibition drilling fluid and its preparation side
Method.
Background technique
Pit shaft unstability in shale formation is the technological challenge in drillng operation.Unstable root is chemistry and machine
Tool.Mechanical part is drillng operation as a result, and interaction of the chemical part then between drilling fluid and shale is related.Work as work
Property shale and conventional water-base drilling fluid when contacting, they can be expanded in the presence of activated clay (mainly sodium saturation montmorillonite).
In the worst case, wellbore instability will lead to the loss even abandoned well of drilling assemblies and sidetracking.
Oil base drilling fluid has advantage to shale formation, but due to environmental disruption and at high cost, their application is limited
System.Therefore, be conducive to well drilling industry using high-performance and environmental-friendly water-base drilling fluid.Opposite oil base drilling fluid water-based drilling
Cost can be effectively reduced in liquid, reduces the pollution to environment, rheological characteristic is affected by temperature smaller.
Domestic water-base drilling fluid addition can reduce the pollution to environment to a certain extent, but biological hypotoxicity can drop
The additive of solution uses fewer and fewer.Biodegradable additive, which can play the role of preferably adjusting property of drilling fluid, again may be used
To reduce environmental pollution.
Summary of the invention
The purpose of the present invention is: in order to overcome the borehole well instability encountered in water-base drilling fluid drilling process used at present,
Shale Hydration expansion, filter loss be excessive, problem of environmental pollution, provides a kind of Biodegradable environment protection high inhibition thus and bores
Well liquid and preparation method thereof.
In order to achieve the above object, one aspect of the present invention provides a kind of Biodegradable environment protection high inhibition drilling fluid,
It is characterized in preparing drilling fluid raw materials used component and its content, unit is gram:
The PH for adding the NaOH aqueous solution regulation system of 5-10 parts by weight is 9-10.300-900 parts by weight drilling fluid is added
Adjusting density with heavy weight additive barite is 1.1-1.4g/cm3；
Drilling fluid bentonite used in drilling well liquid and preparation method thereof according to the present invention, glycyrrhizin, sodium chloride nacl,
Carboxymethyl starch CMS, polyanion cellulose PAC-LV, partially hydrolyzed polyacrylamide (PHPA) PHP, xanthan gum, NaOH are market
Upper sale product must be examined when buying according to professional standard or company standard, be reused after the assay was approved.Specifically it is shown in Table 1.
A kind of Biodegradable environment protection high inhibition drilling fluid base stock detail list of table 1
Another aspect of the present invention provides a kind of preparation method of Biodegradable environment protection high inhibition drilling fluid:
First take 1000 grams of tap water that 30-50 grams of drilling fluid swelling is added at low-speed electronic blender 600r/min
Soil, the sodium chloride nacl that stirring 20min is added 80-90 grams are stirred for 10 minutes；It is added under conditions of low speed 600r/min again
20-60 grams of glycyrrhizin stirs 20 minutes, adds 6-10 grams of polyanion cellulose PAC-LV and stirs 10 minutes；In low speed
2-6 grams of partially hydrolyzed polyacrylamide (PHPA) PHP is added under 600r/min to stir 20 minutes, adds 2-6 grams of xanthan gum stirring
20 minutes, 6-10 grams of carboxymethyl starch CMS is added and stirs 20 minutes；Add 5-10 grams sodium hydroxide adjustment system PH be
9-10, it is 1.1-1.4g/cm that 300-900 grams of drilling fluid, which is added, and stirs 1 hour adjusting density with heavy weight additive barite3, it is made one
Kind Biodegradable environment protection high inhibition drilling fluid.
Specific embodiment:
First aspect present invention provides a kind of Biodegradable environment protection drilling fluid, wherein the drilling fluid includes water, swollen
Moisten soil, sodium hydroxide, inhibitor, sodium chloride, fluid loss additive, heavy weight additive, flocculant, tackifier, and with the water of 1000 parts by weight
On the basis of, the bentonite 30-60 parts by weight, the sodium hydroxide 5-10 parts by weight, the inhibitor 20-60 parts by weight, institute
State fluid loss additive 11-20 parts by weight, the sodium chloride 80-90 parts by weight, the heavy weight additive 300-900 parts by weight, the flocculation
Agent 2-6 parts by weight, the tackifier 2-6 parts by weight.
According to the present invention, as long as the drilling fluid forms sediment containing drilling fluid bentonite, glycyrrhizin, sodium chloride, carboxymethyl
Powder, polyanion cellulose, partially hydrolyzed polyacrylamide (PHPA), xanthan gum, sodium hydroxide, drilling fluid barite, and meet
Above-mentioned proportionate relationship can achieve the purpose that invention.
According to the present invention, as long as the drilling fluid forms sediment containing drilling fluid bentonite, glycyrrhizin, sodium chloride, carboxymethyl
Powder, polyanion cellulose, partially hydrolyzed polyacrylamide (PHPA), xanthan gum, sodium hydroxide, drilling fluid barite, and meet
Above-mentioned proportionate relationship can achieve the purpose that invention.But under preferable case, the weight of the bentonite 35-55 described in the drilling fluid
Amount part, the sodium hydroxide 7-9 parts by weight, the inhibitor 25-50 parts by weight, the fluid loss additive 14-18 parts by weight are described
Sodium chloride 85-88 parts by weight, the heavy weight additive 300-800 parts by weight, the flocculant 3-5 parts by weight, the tackifier 3-5 weight
Measure part.
Second aspect of the present invention provides a kind of preparation method of aforementioned Biodegradable environment protection drilling fluid,
In, this method is under agitation, to sequentially add drilling fluid bentonite, glycyrrhizin, sodium chloride, carboxymethyl starch, gather
Anionic cellulose, partially hydrolyzed polyacrylamide (PHPA), xanthan gum, sodium hydroxide, drilling fluid barite.
It is swollen in 80-150 DEG C of aquation that third aspect present invention provides a kind of aforementioned Biodegradable environment protection drilling fluid
Swollen serious shale formation.
Embodiment 1:
The present embodiment is for illustrating a kind of Biodegradable environment protection high inhibition drilling fluid and preparation method thereof.
It takes 1000 grams of tap water that 30 grams of drilling fluid bentonite is added at low-speed electronic blender 600r/min, stirs
The sodium chloride nacl for mixing 80 grams of 20min addition is stirred for 20 minutes；20 grams sweet is added under conditions of low speed 600r/min again
Careless glucin stirs 20 minutes, adds 5 grams of polyanion cellulose PAC-LV and stirs 10 minutes；It is added at low speed 600r/min
2 grams of partially hydrolyzed polyacrylamide (PHPA) PHP is stirred 20 minutes, is added 2 grams of xanthan gum and is stirred 20 minutes, 6 grams of carboxylic first are added
Base starch CMS is stirred 20 minutes；The PH for adding 5 grams of sodium hydroxide adjustment system is 9, and 300 grams of drilling fluids are added and aggravate
It is 1.1g/cm that agent barite, which stirs 1 hour adjusting density,3, a kind of Biodegradable environment protection high inhibition drilling fluid S1 is made.Its property
It can test result such as table 2.
Embodiment 2:
The present embodiment is for illustrating a kind of Biodegradable environment protection high inhibition drilling fluid and preparation method thereof.
First take 1000 grams of tap water that 60 grams of drilling fluid bentonite is added at low-speed electronic blender 600r/min,
The sodium chloride nacl that stirring 20min is added 90 grams is stirred for 10 minutes；60 grams are added under conditions of low speed 600r/min again
Glycyrrhizin stirs 20 minutes, adds 10 grams of polyanion cellulose PAC-LV and stirs 10 minutes；At low speed 600r/min
6 grams of partially hydrolyzed polyacrylamide (PHPA) PHP is added to stir 20 minutes, adds 6 grams of xanthan gum and stirs 20 minutes, be added 10 grams
Carboxymethyl starch CMS is stirred 20 minutes；The PH for adding 10 grams of sodium hydroxide adjustment system is 10, and 900 grams of drilling fluids are added
Stirring 1 hour adjusting density with heavy weight additive barite is 1.4g/cm3, a kind of Biodegradable environment protection high inhibition drilling fluid is made
S2.Its performance test results is shown in Table 2.
Embodiment 3:
The present embodiment is for illustrating a kind of Biodegradable environment protection high inhibition drilling fluid and preparation method thereof.
According to a kind of Biodegradable environment protection high inhibition drilling fluid of preparation method same as Example 1, institute's difference
It is: takes 1000 grams of tap water that 40 grams of drilling fluid bentonite is added at low-speed electronic blender 600r/min, stirs
The sodium chloride nacl that 20min is added 84 grams is stirred for 10 minutes；30 grams of Radix Glycyrrhizae is added under conditions of low speed 500r/min again
Glucin stirs 20 minutes, adds 7 grams of polyanion cellulose PAC-LV and stirs 10 minutes；3 are added at low speed 600r/min
Gram partially hydrolyzed polyacrylamide (PHPA) PHP stir 20 minutes, add 3 grams xanthan gum stir 20 minutes, 7 grams of carboxymethyls are added
Starch CMS is stirred 20 minutes；The PH for adding 6 grams of sodium hydroxide adjustment system is 9, stirs 1 hour, 500 grams of drilling wells are added
It is 1.2g/cm that liquid, which adjusts density with heavy weight additive barite,3, a kind of Biodegradable environment protection high inhibition drilling fluid S3 is made.It is surveyed
Test result is shown in Table 2.
Embodiment 4:
The present embodiment is for illustrating a kind of Biodegradable environment protection high inhibition drilling fluid and preparation method thereof.
First take 1000 grams of tap water that 50 grams of drilling fluid bentonite is added at low-speed electronic blender 600r/min,
The sodium chloride nacl that stirring 20min is added 88 grams is stirred for 10 minutes；50 grams are added under conditions of low speed 500r/min again
Glycyrrhizin stirs 20 minutes, adds 9 grams of polyanion cellulose PAC-LV and stirs 10 minutes；Add at low speed 600r/min
Enter 5 grams of partially hydrolyzed polyacrylamide (PHPA) PHP to stir 20 minutes, adds 5 grams of xanthan gum and stir 20 minutes, 8 grams of carboxylics are added
Methyl starch CMS is stirred 20 minutes；The PH for adding 10 grams of sodium hydroxide adjustment system is 9-10, and 900 grams of drilling fluids are added
Stirring 1 hour adjusting density with heavy weight additive barite is 1.4g/cm3, a kind of Biodegradable environment protection high inhibition drilling fluid is made
S4, the performance test results are shown in Table 2.
Comparative example 1:
According to a kind of Biodegradable environment protection high inhibition drilling fluid of preparation method same as Example 1, institute's difference
It is: takes 1000 grams of tap water that 20 grams of drilling fluid bentonite is added at low-speed electronic blender 600r/min, stirs
The sodium chloride nacl that 20min is added 60 grams is stirred for 20 minutes；15 grams of Radix Glycyrrhizae is added under conditions of low speed 500r/min again
Glucin stirs 20 minutes, adds 3 grams of polyanion cellulose PAC-LV and stirs 10 minutes；1 is added at low speed 600r/min
Gram partially hydrolyzed polyacrylamide (PHPA) PHP stir 20 minutes, add 1 gram xanthan gum stir 20 minutes, 4 grams of carboxymethyls are added
Starch CMS is stirred 20 minutes；The PH for adding 4 grams of sodium hydroxide adjustment system is 9, and 200 grams of drilling fluid heavy weight additives are added
It is 1.1g/cm that barite, which stirs 1 hour adjusting density,3, a kind of Biodegradable environment protection high inhibition drilling fluid D1, performance is made
Test result such as table 2.
Comparative example 2:
According to a kind of Biodegradable environment protection high inhibition drilling fluid of preparation method same as Example 1, institute's difference
It is: takes 1000 grams of tap water that 70 grams of drilling fluid bentonite is added at low-speed electronic blender 600r/min, stirs
The sodium chloride nacl that 20min is added 100 grams is stirred for 20 minutes；70 grams of Radix Glycyrrhizae is added under conditions of low speed 500r/min again
Glucin stirs 20 minutes, adds 12 grams of polyanion cellulose PAC-LV and stirs 10 minutes；8 are added at low speed 600r/min
Gram partially hydrolyzed polyacrylamide (PHPA) PHP stir 20 minutes, add 8 grams xanthan gum stir 20 minutes, 13 grams of carboxylic first are added
Base starch CMS is stirred 20 minutes；The PH for adding 11 grams of sodium hydroxide adjustment system is 10, and 1000 grams of drilling fluids use are added and add
It is 1.45g/cm that heavy prescription barite, which stirs 1 hour adjusting density,3, a kind of Biodegradable environment protection high inhibition drilling fluid D2 is made,
Its performance test results such as table 2.
Comparative example 3:
According to preparation method kind environmental sound biodegradable high inhibition drilling fluid same as Example 1, institute
The difference is that: glycyrrhizin is substituted for the KCl of 55 parts by weight, obtained drilling fluid D3, test result such as table 2.
Comparative example 4:
According to preparation method kind environmental sound biodegradable high inhibition drilling fluid same as Example 1, institute
The difference is that: glycyrrhizin is substituted for 55 parts by weight polyethers diammoniums, obtained drilling fluid D4, test result such as table 2.
Test case:
By embodiment 1-4 and comparative example 1-4 roller furnace, aging 16h measures rolling rate of recovery under the conditions of 150 DEG C；It uses again
The shale rock for soaking by the filtrate 6-10 mesh shale landwaste, measuring when 1h, 4h, 16h of drilling fluid D1, D2, D3, D4, D5, D6, D7, D8
Consider expansion rate to be worth doing.
2 drilling fluid D1-D7 rolling rate of recovery of table and linear expansion experimental data
By rolling rate of recovery experiment and linear expansion experimental data it is found that the clear water when any additive is not added
Rolling rate of recovery and linear expansion rate it is all very big, by EXPERIMENTAL EXAMPLE S1-4 and comparative example D1-D4 it is found that being added sweet
Careless glucin can effectively inhibit shale landwaste hydration swelling.Particularly with the addition of 20-60 parts by weight glycyrrhizin when above-mentioned brill
The inhibition of well liquid is stronger.
Claims (10)
1. a kind of Biodegradable environment protection high inhibition drilling fluid, it is characterized in that: drilling fluid institute is aqueous, bentonite, sodium hydroxide,
Inhibitor, sodium chloride, fluid loss additive, heavy weight additive, flocculant, tackifier, and on the basis of the water of 1000 parts by weight, the swelling
Native 30-60 parts by weight, the sodium hydroxide 5-10 parts by weight, the inhibitor 20-60 parts by weight, the fluid loss additive 11-20
Parts by weight, the sodium chloride 80-90 parts by weight, the heavy weight additive 300-900 parts by weight, the flocculant 2-6 parts by weight are described
Tackifier 2-6 parts by weight.
2. drilling fluid according to claim 1, wherein the bentonite 35-55 weight on the basis of the water of 1000 parts by weight
Amount part, the sodium hydroxide 7-9 parts by weight, the inhibitor 25-50 parts by weight, the fluid loss additive 14-18 parts by weight are described
Sodium chloride 85-88 parts by weight, the heavy weight additive 400-800 parts by weight, the flocculant 3-5 parts by weight, the tackifier 3-5 weight
Measure part.
3. the drilling fluid according to claims 1 or 2, wherein the bentonite is sodium bentonite.
4. the drilling fluid according to claims 1 or 2, wherein the inhibitor is glycyrrhizin, KCl or/and polyethers two
One of ammonium is several, it is preferable that the inhibitor is glycyrrhizin.
5. the drilling fluid according to claims 1 or 2, wherein the fluid loss additive be sodium carboxymethylcellulose, poly- yin from
One of subbundle element PAC-LV or/and carboxymethyl starch CMS are several, it is preferable that the fluid loss additive be poly- yin from
Subbundle element PAC-LV and carboxymethyl starch CMS compounding.
6. the drilling fluid according to claims 1 or 2, wherein the heavy weight additive is drilling fluid barite BaSO4Or/and
One of Iron Ore Powder is several, it is preferable that the heavy weight additive is drilling fluid barite BaSO4。
7. the drilling fluid according to claims 1 or 2, wherein the flocculant is bentonite synergist, cation poly- third
One or more of acrylamide or/and partially hydrolyzed polyacrylamide (PHPA) PHP, it is preferable that the flocculant is poly- for partial hydrolysis
Acrylamide.
8. the drilling fluid according to claims 1 or 2, wherein the tackifier are xanthan gum or/and high viscosity carboxymethyl
One of cellulose is several, it is preferable that the tackifier are xanthan gum.
9. a kind of preparation method of Biodegradable environment protection high inhibition drilling fluid, which is characterized in that the preparation method includes following
Step:
It (1) is 600r/min condition stirring 20 in stirring rate by the tap water of 1000 parts by weight and 30-60 parts by weight of bentonite
Static 1 day after minute；
(2) by the resulting prehydration bentonite of step (1) and 80-90 grams of sodium chloride nacl with 600r/min rate stirring 10
Minute；
(3) glycyrrhizin that step (2) resulting mixture is added to 20-60 grams under conditions of low speed 600r/min stirs 20 points
Clock adds 6-10 grams of polyanion cellulose PAC-LV and stirs 10 minutes；
(4) step (3) resulting mixture is added to 2-6 grams of partially hydrolyzed polyacrylamide (PHPA) under the conditions of low speed 600r/min
PHP, 2-6 grams of xanthan gum, 6-10 grams of carboxymethyl starch CMS are stirred 20 minutes；
(5) step (4) resulting mixture is added to 5-10 grams of sodium hydroxide under the conditions of low speed 600r/min, 300- is added
900 grams of drilling fluids stir 1 hour adjusting density with heavy weight additive barite, and a kind of Biodegradable environment protection high inhibition drilling well is made
Liquid.
10. being suitble to 80-150 DEG C of the serious shale of hydration swelling according to drilling fluid obtained by 9 the method for claims
Stratum.
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| CN115678514A (en) * | 2022-08-25 | 2023-02-03 | 西安石油大学 | Application of plant extract as shale hydration inhibitor |
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| CN109652033B (en) | 2021-10-22 |
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