CN101244372A - Foaming agent and circulation microvesicle drilling fluids and drilling technique - Google Patents
Foaming agent and circulation microvesicle drilling fluids and drilling technique Download PDFInfo
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- CN101244372A CN101244372A CNA200710118082XA CN200710118082A CN101244372A CN 101244372 A CN101244372 A CN 101244372A CN A200710118082X A CNA200710118082X A CN A200710118082XA CN 200710118082 A CN200710118082 A CN 200710118082A CN 101244372 A CN101244372 A CN 101244372A
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Abstract
The invention discloses a foaming agent and circulative micro-foam drilling fluid as well as well-drilling technological method; wherein, the foaming agent comprises 30% neopelex ABS, and 70% lauryl sodium sulfate SDS; the circulative micro-foam drilling fluid is produced through adding 0.1% sodium hydroxide, 0.2 to 0.3% xanthan gum XC, 0.2 to 0.3% medium viscosity flocculent cellulose CMC and 0.1 to 0.3% foaming agent; during well drilling construction, the circulative micro-foam drilling fluid is first to be prepared, and then is used to perform the wet drilling. With the foaming agent added to the circulative micro-foam drilling fluid, the formed micro-foam slurry has the advantages of good leakage proof and plugging effect, great lubrication performance, good rheology, obvious improved drilling quality and drilling efficiency.
Description
Technical field
The present invention relates to a kind of drilling technique, relate in particular to a kind of blowing agent and microvesicle drilling fluid capable of circulation and use the process that this drilling fluid carries out drilling well.
Background technology
Solid mineral products stratum is because the influence of its formation condition causes the structural anomaly complexity on this stratum.Usually the growth of crack, crushed zone can form lost-circulation zone, and in drilling process, drilling fluid can be missed from these lost-circulation zones, influences normally carrying out of wellbore construction.Creep into particularly greatly, drilling fluid leakage, emit the problems such as slurry to have increased the difficulty of wellbore construction apart from horizontal orientation.And in the existing drilling technology, the leak-proof leak-stopping effect of drilling fluid is relatively poor, has reduced the efficient of creeping into.
Summary of the invention
The purpose of this invention is to provide a kind of blowing agent and microvesicle drilling fluid capable of circulation and well-drilling technology, better with the leak-proof leak-stopping effect of the microvesicle drilling fluid capable of circulation of this blowing agent preparation, the efficient that this well-drilling technology creeps into is higher.
The objective of the invention is to be achieved through the following technical solutions:
Blowing agent of the present invention, it comprises following component: neopelex ABS and lauryl sodium sulfate SDS, the percentage by weight of two kinds of components is respectively:
Neopelex ABS:20-40%;
Lauryl sodium sulfate SDS:60-80%.
The percentage by weight of described two kinds of components is respectively:
Neopelex ABS:30%;
Lauryl sodium sulfate SDS:70%.
It also comprises component: alpha-alkene sulfonate AOS, and the percentage by weight of three kinds of components is respectively:
Alpha-alkene sulfonate AOS:10-30%;
Neopelex ABS:20%-40%;
Lauryl sodium sulfate SDS:40%-60%.
The percentage by weight of described three kinds of components is respectively:
Alpha-alkene sulfonate AOS:20%;
Neopelex ABS:30%;
Lauryl sodium sulfate SDS:50%.
Microvesicle drilling fluid capable of circulation of the present invention comprises the prehydration bentonite slurry in the described microvesicle drilling fluid capable of circulation, and in the described prehydration bentonite slurry, the shared percentage by weight of bentonite is 4-5%;
Also comprise the described blowing agent of claim 1-4 in the described microvesicle drilling fluid capable of circulation, described blowing agent shared percentage by weight in microvesicle drilling fluid capable of circulation is 0.1-0.3%;
Also comprise foam stabilizer in the described microvesicle drilling fluid capable of circulation, described foam stabilizer comprises following component: xanthans XC and wadding fibrous plain CMC,
Each component shared percentage by weight in microvesicle drilling fluid capable of circulation is respectively:
Xanthans XC:0.2-0.3%;
Wadding fibrous plain CMC:0.3%-0.5%.
Also comprise NaOH in the described microvesicle drilling fluid capable of circulation, described NaOH shared percentage by weight in microvesicle drilling fluid capable of circulation is: 0.08-0.12%.
Well-drilling technology of the present invention comprises following steps:
A, the described microvesicle drilling fluid capable of circulation of preparation claim 5 comprise the described blowing agent of claim 1-4 in the described microvesicle drilling fluid capable of circulation;
The described microvesicle drilling fluid capable of circulation of B, applying step A carries out drilling well.
Described steps A comprises following steps:
The prehydration bentonite slurry of A1, water and bentonite preparation 4-5%, and add NaOH, fully stirring, the pH that adjusts the prehydration bentonite slurry is 9-11;
Xanthans XC and the wadding fibrous plain CMC of 0.3-0.5% of A2, adding 0.2-0.3% stirred after 10 minutes, added the 0.1-0.3% blowing agent, fully stirred, and were mixed with described microvesicle drilling fluid capable of circulation.
In the described steps A 2, also add a spot of diverting agent and sulfonated gilsonite.
Described step B comprises following steps:
B1, at first in boring, pump into described microvesicle drilling fluid capable of circulation, the mud in the boring is replaced out and bled off;
B2, hole then, and continue in boring, to pump into microvesicle drilling fluid capable of circulation, after the microvesicle drilling fluid capable of circulation that will discharge in hole stir, refill in the boring;
Among the described step B, whenever creep into 50 meters or reach 12 hours when boring after, in microvesicle drilling fluid capable of circulation, replenish described blowing agent, and, make it remain on the concentration of needs by the foam stabilizer that xanthans XC and wadding fibrous plain CMC form.
As seen from the above technical solution provided by the invention, blowing agent of the present invention and microvesicle drilling fluid capable of circulation and well-drilling technology, owing to add blowing agent of the present invention in the microvesicle drilling fluid capable of circulation, the microfoam mud leak-proof leak-stopping that forms is effective, greasy property good, rheological characteristic good, can obviously improve the quality of probing and the efficient of creeping into.
The specific embodiment
Blowing agent of the present invention, its preferable specific embodiment are that it comprises following two kinds of components: neopelex ABS and lauryl sodium sulfate SDS, and the percentage by weight of two kinds of components is respectively:
Neopelex ABS:20-40% can be 20,25,30,35,40% equal proportion;
Lauryl sodium sulfate SDS:60-80% can be 60,65,70,75,80% equal proportion.
Blowing agent can also comprise component: alpha-alkene sulfonate AOS.This situation generally is to be applied under the formation temperature condition with higher, and the percentage by weight of three kinds of components is respectively:
Alpha-alkene sulfonate AOS:10-30% can be 10,15,20,25,30% equal proportion;
Neopelex ABS:20%-40% can be 20,25,30,35,40% equal proportion;
Lauryl sodium sulfate SDS:40%-60% can be 40,45,50,55,60% equal proportion.
Microvesicle drilling fluid capable of circulation of the present invention, its preferred implementation is, the main liquid of described microvesicle drilling fluid capable of circulation is the prehydration bentonite slurry, the main component of described prehydration bentonite slurry is water and bentonite, wherein, the shared percentage by weight of bentonite is 4-5%, can be 4,4.5,5% equal proportion.
In the prehydration bentonite slurry, add above-mentioned blowing agent then, and foam stabilizer and proper amount of sodium hydroxide etc.
Wherein, described blowing agent shared percentage by weight in microvesicle drilling fluid capable of circulation is 0.1-0.3%, can be 0.1,0.2,0.3% equal proportion;
Described foam stabilizer comprises following component: xanthans XC and wadding fibrous plain CMC, each component shared percentage by weight in microvesicle drilling fluid capable of circulation is respectively:
Xanthans XC:0.2-0.3% can be 0.2,0.25,0.3% equal proportion;
Wadding fibrous plain CMC:0.2%-0.5% can be 0.2,0.3,0.4,0.5% equal proportion.Preferably select the wadding fibrous plain CMC of neutral viscosity for use.
Described NaOH shared percentage by weight in microvesicle drilling fluid capable of circulation is: 0.08-0.12% can be 0.08,0.1,0.12% equal proportion.
Performance under this microvesicle drilling fluid normal temperature capable of circulation sees the following form 1:
| ρ g/cm 3 | AV mPa.s | PV mPa.s | YP Pa | Gel 10’/10” Pa/Pa | FV s | FL ml | pH |
| 0.8-1.10 | 40-55 | 10-29 | 15-22.5 | 5-9/13-19 | 40-110 | ＜10 | 9.5 |
ρ is a microvesicle drilling fluid density capable of circulation in the table, and AV is an apparent viscosity, and PV is a plastic viscosity, and YP is a yield value, Gel10 '/10 " be gel initial and the 10-minute gel strength of 10s and 10min, FV is a funnel viscosity, FL is API (American Petroleum Institute) filter loss.
This drilling well other performance indications at normal temperatures sees the following form 2:
| The anticalcium ability, mg/l | ＞3000 |
| Saline-alkaline tolerance, mg/l | ＞5000 |
| Anti-oily ability, % | ＞15 |
| Anti-stick native ability, % | ＞5 |
| The landwaste rate of recovery, % | ＞80 |
Well-drilling technology of the present invention comprises following steps:
Step 1, at first prepare above-mentioned microvesicle drilling fluid capable of circulation, comprise above-mentioned blowing agent in the described microvesicle drilling fluid capable of circulation;
Step 2, applying step 1 described microvesicle drilling fluid capable of circulation carry out drilling well.
Above-mentioned step 1 comprises following steps:
The prehydration bentonite slurry of step 11, water and bentonite preparation 4-5%, and add NaOH, fully stirring, the pH that adjusts the prehydration bentonite slurry is 9-11;
Xanthans XC and the wadding fibrous plain CMC of 0.3-0.5% of step 12, adding 0.2-0.3% stirred after 10 minutes, added the 0.1-0.3% blowing agent, fully stirred, and were mixed with described microvesicle drilling fluid capable of circulation.In this process, can also add a spot of diverting agent and sulfonated gilsonite, can increase the leak-proof leak-stopping effect of microvesicle drilling fluid capable of circulation, when being applied to wellbore construction, can make the borehole wall more smooth.
Above-mentioned step 2 comprises following steps:
Step 21, at first in boring, inject described microvesicle drilling fluid capable of circulation, the mud in the boring is replaced out bleed off;
Step 22, hole then, and continue in boring, to inject microvesicle drilling fluid capable of circulation, will the microvesicle drilling fluid capable of circulation of discharge stir in hole after, refill in the boring;
In the drilling process, for reaching the purpose of stable foam, the effective content that will as far as possible keep blowing agent and foam stabilizer, whenever creep into 50 meters or reach 12 hours when boring after, in microvesicle drilling fluid capable of circulation, replenish described blowing agent, and, make it remain on the concentration that needs by the foam stabilizer that xanthans XC and wadding fibrous plain CMC form.
In concrete work progress, utilize high-power mixer to stir, keep the stable of mud property.Also can spray at the construction field (site) and produce microvesicle by nozzle.
In drilling process, also to do suitable adjustment to the batching of microvesicle drilling fluid capable of circulation according to the concrete condition at scene, specific as follows:
Run into easy water burst location, should replenish and add viscous material and weighting material, increase the viscosity and the density of microvesicle drilling fluid capable of circulation;
Run into absorbent formation or medium leakage stratum, should improve the viscosity of microvesicle drilling fluid capable of circulation, and suitably strengthen the dosage of blowing agent, if words with good conditionsi improve the rotating speed of mixer as far as possible, make the microvesicle of generation more tiny, more stable.At serious thief zone, except the viscosity that improves microvesicle drilling fluid capable of circulation, also be necessary to add following several sealing agent or two or more composite sealing agents.As granular pitch, walnut shell, coke grain; Fibrous sawdust, cotton fiber, peanut shell, paper fiber; The mica sheet of sheet, straw shell etc.;
Run into abundant saliferous strata, should suitably strengthen the amount of blowing agent.
In in mud stone, creeping into, should strengthen humic acid potassium content, suppress mud stone expansion undergauge, when the effect of mud stone nature pulping makes microvesicle drilling fluid multiviscosisty capable of circulation, should constantly replenish weak solutions, avoid always discharging mud, the cost increase.
In addition, when disposing microvesicle drilling fluid capable of circulation, should be earlier with foam stabilizer, after add blowing agent, avoid bulla to produce, should improve the mixer rotating speed on the other hand as far as possible, make microvesicle even, tiny.
Because foam microvesicle drilling fluid viscosity capable of circulation is big, sandstone wherein is difficult for precipitation, and therefore microvesicle drilling fluid capable of circulation preferably precipitates desanding before use.Mechanical desander perhaps is installed mud is carried out purified treatment.
For improving the leak-proof leak-stopping effect of microvesicle drilling fluid capable of circulation, the mud skin that forms on the borehole wall when making drilling well is fine and close more, reduces number of dropouts, can be in each adding blowing agent and foam stabilizer, add a small amount of diverting agent and sulfonated gilsonite, make borehole wall stability regular more.
Microvesicle drilling fluid capable of circulation of the present invention, it is low to add the microfoam mud density that forms behind the blowing agent of the present invention, and the head of liquid when having reduced wellbore construction in the well, and good leak-proof leak-stopping effect can also be recycling, reduced cost.
In addition, microfoam mud lubrication performance is good, and rheological characteristic is good, and the shear thinning effect of mud is obvious.At bit port high-rate of shear place, the microfoam mud viscosity diminishes, and similar clear water creeps into; And at the annular space place, the microfoam mud viscosity increases, and well carries the rock dust ability.So both kept clean at the bottom of the hole, and avoided other accidents in the hole, wearing and tearing such as drill bit, drilling rod, catcher reduce, and have improved rate of penetration again, have reduced exploration cost.
Microfoam mud can also effectively reduce the fluid loss of mud, forms thin and fine and close mud skin in the hole, well protects hole wall.
The above; only for the preferable specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (10)
1. a blowing agent is characterized in that, it comprises following component: neopelex ABS and lauryl sodium sulfate SDS, and the percentage by weight of two kinds of components is respectively:
Neopelex ABS:20-40%;
Lauryl sodium sulfate SDS:60-80%.
2. blowing agent according to claim 1 is characterized in that, the percentage by weight of described two kinds of components is respectively:
Neopelex AABS:30%;
Lauryl sodium sulfate SDS:70%.
3. blowing agent according to claim 1 is characterized in that, it also comprises component: alpha-alkene sulfonate AOS, and the percentage by weight of three kinds of components is respectively:
Alpha-alkene sulfonate AOS:10-30%;
Neopelex AABS:20%-40%;
Lauryl sodium sulfate SDS:40%-60%.
4. blowing agent according to claim 3 is characterized in that, the percentage by weight of described three kinds of components is respectively:
Alpha-alkene sulfonate AOS:20%;
Neopelex ABS:30%;
Lauryl sodium sulfate SDS:50%.
5. a microvesicle drilling fluid capable of circulation is characterized in that, comprises the prehydration bentonite slurry in the described microvesicle drilling fluid capable of circulation, and in the described prehydration bentonite slurry, the shared percentage by weight of bentonite is 4-5%;
Also comprise the described blowing agent of claim 1-4 in the described microvesicle drilling fluid capable of circulation, described blowing agent shared percentage by weight in microvesicle drilling fluid capable of circulation is 0.1-0.3%;
Also comprise foam stabilizer in the described microvesicle drilling fluid capable of circulation, described foam stabilizer comprises following component: xanthans XC and wadding fibrous plain CMC,
Each component shared percentage by weight in microvesicle drilling fluid capable of circulation is respectively:
Xanthans XC:0.2-0.3%;
Wadding fibrous plain CMC:0.3%-0.5%.
Also comprise NaOH in the described microvesicle drilling fluid capable of circulation, described NaOH shared percentage by weight in microvesicle drilling fluid capable of circulation is: 0.08-0.12%.
6. a well-drilling technology is characterized in that, comprises following steps:
A, the described microvesicle drilling fluid capable of circulation of preparation claim 5 comprise the described blowing agent of claim 1-4 in the described microvesicle drilling fluid capable of circulation;
The described microvesicle drilling fluid capable of circulation of B, applying step A carries out drilling well.
7. well-drilling technology according to claim 6 is characterized in that, described steps A comprises following steps:
The prehydration bentonite slurry of A1, water and bentonite preparation 4-5%, and add NaOH, fully stirring, the pH that adjusts the prehydration bentonite slurry is 9-11;
Xanthans XC and the wadding fibrous plain CMC of 0.3-0.5% of A2, adding 0.2-0.3% stirred after 10 minutes, added the 0.1-0.3% blowing agent, fully stirred, and were mixed with described microvesicle drilling fluid capable of circulation.
8. well-drilling technology according to claim 7 is characterized in that, in the described steps A 2, also adds a spot of diverting agent and sulfonated gilsonite.
9. well-drilling technology according to claim 6 is characterized in that, described step B comprises following steps:
B1, at first in boring, pump into described microvesicle drilling fluid capable of circulation, the mud in the boring is replaced out and bled off;
B2, hole then, and continue in boring, to pump into microvesicle drilling fluid capable of circulation, after the microvesicle drilling fluid capable of circulation that will discharge in hole stir, refill in the boring.
10. well-drilling technology according to claim 9, it is characterized in that, among the described step B, whenever creep into 50 meters or reach 12 hours when boring after, in microvesicle drilling fluid capable of circulation, replenish described blowing agent, and, make it remain on the concentration that needs by the foam stabilizer that xanthans XC and wadding fibrous plain CMC form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710118082XA CN100571855C (en) | 2007-06-28 | 2007-06-28 | Blowing agent and microvesicle drilling fluid capable of circulation and well-drilling technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710118082XA CN100571855C (en) | 2007-06-28 | 2007-06-28 | Blowing agent and microvesicle drilling fluid capable of circulation and well-drilling technology |
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| Publication Number | Publication Date |
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| CN101244372A true CN101244372A (en) | 2008-08-20 |
| CN100571855C CN100571855C (en) | 2009-12-23 |
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| CN112776131A (en) * | 2020-12-23 | 2021-05-11 | 北华大学 | Manufacturing method of agricultural and forestry waste foamed heat-insulation concrete block |
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