CN108822811A - A kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid and preparation method - Google Patents
A kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid and preparation method Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 130
- 239000012530 fluid Substances 0.000 title claims abstract description 76
- 230000005764 inhibitory process Effects 0.000 title claims abstract description 35
- 229920000768 polyamine Polymers 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 63
- 239000000654 additive Substances 0.000 claims abstract description 45
- 230000000996 additive effect Effects 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000000314 lubricant Substances 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 150000001412 amines Chemical class 0.000 claims abstract description 19
- 239000000126 substance Substances 0.000 claims abstract description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 41
- 239000000843 powder Substances 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 24
- 239000000853 adhesive Substances 0.000 claims description 19
- 230000001070 adhesive effect Effects 0.000 claims description 19
- 238000004220 aggregation Methods 0.000 claims description 19
- 230000002776 aggregation Effects 0.000 claims description 19
- 150000003839 salts Chemical class 0.000 claims description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 229920006321 anionic cellulose Polymers 0.000 claims description 18
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 18
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 12
- 229920002472 Starch Polymers 0.000 claims description 12
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims description 12
- 239000008107 starch Substances 0.000 claims description 12
- 235000019698 starch Nutrition 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical group [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 238000004090 dissolution Methods 0.000 claims description 8
- 239000010773 plant oil Substances 0.000 claims description 8
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 239000001103 potassium chloride Substances 0.000 claims description 5
- 235000011164 potassium chloride Nutrition 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 5
- 239000004575 stone Substances 0.000 abstract description 38
- 238000010276 construction Methods 0.000 abstract description 13
- 230000008901 benefit Effects 0.000 abstract description 10
- 239000003112 inhibitor Substances 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 7
- 239000007791 liquid phase Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003389 potentiating effect Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 20
- 238000009472 formulation Methods 0.000 description 10
- 239000001993 wax Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 7
- 125000004122 cyclic group Chemical group 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- 239000005864 Sulphur Substances 0.000 description 5
- 238000013329 compounding Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000010426 asphalt Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000007908 nanoemulsion Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000000518 rheometry Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000009096 changqing Substances 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 239000004047 hole gas Substances 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
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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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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention provides a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid that mud stone is anti-collapse and preparation method, prepares the raw materials used substance including following mass percents of the drilling fluid：Mainly as the organic amine 0.3~0.4% of mud stone potent inhibitor and auxiliary alkaline conditioner；The soluble-salt 3~5% of inhibitor and liquid phase heavy weight additive；Mention stick 0.2~0.4%；Fluid loss additive 1.5~2.5%；Sealing agent 4.0~6.0%；Alkalinity control agent 0.05~0.1%；Lubricant 1.5~2.5%；Heavy weight additive, surplus are water.Soviet Union's Sulige gas field casing window sidetracking Mud Motors in Slim-hole Horizontal Well construction is celebrated present invention can apply to long, is particularly suitable for the construction of long open hole section-lower curved section, horizontal segment containing mud stone well section of easily collapsing.The drilling fluid caving control is strong, has good anti sloughing effectiveness to the mud stone well section that easy aquation is collapsed, wellbore stability rule reduces the incidence of down-hole accident, improves production timeliness, achieves good economic benefit.
Description
Technical field
The present invention relates to one of oilfield drilling operation drilling fluid composition and preparation methods, are a kind of suitable long celebrating gas
Field Mud Motors in Slim-hole Horizontal Well drilling, the drilling fluid of the long open hole well section complexity mudstone stratum drilling especially containing lower curved section, horizontal segment
Formula and preparation method.
Background technique
The league (unit of length) block currently, Changqing Gas Fields are revived carries out casing using the old wellbore in old well site since environmental requirement is higher and higher
The construction of window sidetracking Mud Motors in Slim-hole Horizontal Well, not only can use old well site, reduces expropriation of land pressure, reduces drilling fluid dosage, reduces
Discarded drilling cuttings discharge amount reduces waste drilling fluids disposal expense, meanwhile, and the effective method of exploitation remaining reserves.
But 5 1/2 ＂（139.7mm）Casing window sidetracking belongs to slimhole drilling construction, and hole diameter is less than 7 ＂（177.8mm）Wellbore claim
For slim-hole；Since wellbore is small, the particularity such as drilling tool size is small, drilling tool is rigidly weak, cyclic gap is small, frictional resistance is big, pressurization is difficult,
The problems such as cyclic pressure dissipation is big, pump pressure is high, so that drilling liquid technology is constructed different from conventional well drilling fluid, needs more accurate drilling well
Fluidity energy and accurate operation, the one side with its particularity.In addition, long open hole lower curved section, horizontal segment mud stone collapsing complexity ask
Topic more exacerbates the difficulty of Mud Motors in Slim-hole Horizontal Well construction.S36-X-X well is 5 1/2 ＂ of a bite（ 139.7mm）Casing sidetracking side
Gas well horizontal well to be bored, big section mud stone is met due to boring in lower curved section and horizontal segment, causes mud stone section chip off-falling, collapses, underground is complicated, with
As for well filling sidetracking is caused, drilling period is substantially prolonged, drilling cost is increased, causes certain loss and unnecessary
Waste.
In view of the problem of slim-hole gas well Drilling Fluids for Horizontal Wells is constructed, applied by inspection information, laboratory experiment, scene
Work has investigated a kind of slim-hole gas well Drilling Fluids for Horizontal Wells system formulation for ensureing downhole safety, inhibits anti-according to drilling fluid
It collapses the screening of agent, reasonable compounding, various temporary shielding blocking level of significations match, and form one with strong rejection capability on the basis of seal-off effect
Kind gas well horizontal well slim-hole high inhibition caving-preventing drilling fluid formula, can effectively prevent the undergauge of the caving grounds such as mud stone and collapse
It collapses, maintains wellbore stability, prevent PDC drill bit mud drum, effectively improve drilling well timeliness, hence it is evident that shorten drilling period.To this we
A kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid formula and preparation method are invented.
Summary of the invention
In order to overcome it is existing be easy to cause well filling sidetracking, substantially prolong drilling period, increase drilling cost, cause
The problem of certain loss and unnecessary waste, the present invention provides a kind of gas well horizontal well slim-hole polyamines high inhibition anti-collapse brill
Well liquid formula and preparation method, the present invention are suitble to the operation of long horizontal sections bad ground containing mud stone safety drilling, guarantee safety drilling,
It improves and produces timeliness, reduction drilling cost, the organic and inorganic inhibitor of mud shale that the present invention selects two kinds of differences to stress function,
At least one polymeric viscosifiers, at least one polymer fluid loss agent are main additive, sealing agent, a kind of basicity control
Agent, a kind of lubricant, more than one heavy weight additives are configured to drilling fluid.It is an object of the present invention to due to slim-hole wellbore it is small
（Relative to conventional big wellbore）, annular clearance is small, and cyclic pressure dissipation is big, and pump pressure is high, be easy to suppress leakage stratum, in addition drilling tool rigidity compared with
It is weak, drilling tool accident is easily caused, the risk and difficulty of wellbore construction greatly enhance, and meet mudstone stratum, drilling fluid inhibition if bored
It is poor, once mud stone section is caused to collapse, generate chip off-falling, that will be it is catastrophic because annular clearance is small, larger chip off-falling it is broken
It is all relatively difficult with carrying, it causes to suppress leakage stratum or lock of tool drilling, causes underground complicated, so guaranteeing the well of easy mud stone well section of collapsing
Wall is stable and wellbore rule is unimpeded and its crucial.
The second object of the present invention is that the present invention is acted synergistically using organic and inorganic two kinds of inhibitor, meets enhancing suppression
Property processed, the effects of aggravating, while density of liquid phase is increased, solid concentration is reduced, there is the adjusting using drilling fluid rheology.
The third object of the present invention is that the plugging material that the present invention uses contains modified pitch, nanoemulsions, modified stone
The good novel process agent of the functions such as Na, calcium carbonate superfine powder.
The fourth object of the present invention is the strong rejection capability of the system formulation provided by the invention, strong seal-off effect, not only body
It is functional, and is conducive to reservoir protection, improves gas well yield.
The technical solution adopted by the present invention is：
A kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid, it is characterised in that：It is raw materials used to prepare the drilling fluid
Substance including following mass percents：
Organic amine 0.3~0.4%；
Inorganic soluble salt 3~5%；
Mention stick 0.2~0.4%；
Fluid loss additive 1.5~2.5%；
Sealing agent 4.0~6.0%
Alkalinity control agent 0.05~0.1%；
Lubricant 1.5~2.5%；
Heavy weight additive 20~40%；
Surplus is water.
The organic amine is polyethylene polyamine.
The inorganic soluble salt is potassium chloride.
The stick that mentions is high adhesive aggregation anionic cellulose.
The fluid loss additive is by these three processing of carboxymethyl starch, low adhesive aggregation anionic cellulose and sulfonated phenol formaldehyde resin
Agent is used in mixed way；The mass ratio of carboxymethyl starch, low adhesive aggregation anionic cellulose and sulfonated phenol formaldehyde resin three is（1-2）：1：
（1-2）.
The sealing agent is mixed by calcium carbonate superfine powder powder, sulfonated gilsonite powder and emulsified wax, calcium carbonate superfine powder powder, sulphur
The mass ratio for changing asphalt powder and emulsified wax is（2-3）：1：（1-2）.
The alkalinity control agent is sodium hydroxide.
The lubricant is plant oil modified inorganic agent.
The heavy weight additive is agstone or blanc fixe.
A kind of preparation method of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid, it is characterised in that：
Preparation method is carried out at normal temperatures and pressures according to following procedure by formula rate：
1) clear water is packed by formula rate in slurry commanding tank；
2) according to formula rate, by alkalinity control agent, stick, fluid loss additive, sealing agent is mentioned, is sequentially added under slurry pumping action
In clear water, it is thoroughly mixed uniform, dissolution；
3) organic amine and inorganic soluble salt is added by formula rate again, is uniformly mixed, dissolves；
4）By formula rate, heavy weight additive is added, stirs evenly；
5）At the scene in use, the lubricant of proportion is added, stir evenly, abundant prehydration is configured to drilling fluid.
Beneficial effects of the present invention are：
Present invention is mainly applied to Changqing Gas Fields gas well casing window sidetracking Mud Motors in Slim-hole Horizontal Well horizontal segment, lower curved section drillings to apply
Work, especially horizontal segment mud stone troublesome zone drilling are suitble to Mud Motors in Slim-hole Horizontal Well drilling to need.
The present invention is small due to slim-hole wellbore（Relative to conventional big wellbore）, annular clearance is small, and cyclic pressure dissipation is big, pump pressure
Height is easy to suppress leakage stratum, and drilling tool rigidity is weaker in addition, easily causes drilling tool accident, and the risk and difficulty of wellbore construction greatly enhance,
If bore meet mudstone stratum, drilling fluid inhibition is poor, once cause mud stone section collapse, generate chip off-falling, that will be it is catastrophic,
Because annular clearance is small, the broken and carrying of larger chip off-falling is all relatively difficult, causes to suppress leakage stratum or lock of tool drilling, causes underground
Complexity, so guaranteeing that the wellbore stability of easy mud stone well section of collapsing and wellbore rule are unimpeded and its crucial.
The effects of present invention is acted synergistically using organic and inorganic two kinds of inhibitor, is met enhancing inhibition, is aggravated, simultaneously
Density of liquid phase is increased, solid concentration is reduced, there is the adjusting using drilling fluid rheology.
It is good that the plugging material that the present invention uses contains the functions such as modified pitch, nanoemulsions, Gai Shi Na, calcium carbonate superfine powder
Good novel process agent.
The strong rejection capability of the system formulation provided by the invention, strong seal-off effect, not only system is functional, and is conducive to
Reservoir protection improves gas well yield.
Drilling fluid composition and compounding method provided by the invention act on by force the caving control of mud stone well section, and performance is stablized easy
In adjusting, density is relatively low, good rheological property, can effectively maintenance level section, the lower curved section mud stone borehole wall, keep borehole wall rule,
The needs for combining protection reservoir, had not only been able to satisfy the needs of long horizontal sections drilling, but also can greatly improve well yield, obtained good
Good economic benefit and social benefit, is worthy of popularization.
Specific embodiment
Embodiment 1：
In order to overcome it is existing be easy to cause well filling sidetracking, substantially prolong drilling period, increase drilling cost, cause certain
Loss and unnecessary waste the problem of, the present invention provides a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid
Formula and preparation method, the present invention are suitble to the operation of long horizontal sections bad ground containing mud stone safety drilling, guarantee safety drilling, improve
Production timeliness, reduction drilling cost, the organic and inorganic inhibitor of mud shale that the present invention selects two kinds of differences to stress function, at least
A kind of polymeric viscosifiers, at least one polymer fluid loss agent be main additive, sealing agent, a kind of alkalinity control agent, one
Kind lubricant, more than one heavy weight additives are configured to drilling fluid.It is an object of the present invention to due to slim-hole wellbore it is small（Relatively
In conventional big wellbore）, annular clearance is small, and cyclic pressure dissipation is big, and pump pressure is high, is easy to suppress leakage stratum, in addition weaker, the Yi Zao of drilling tool rigidity
At drilling tool accident, the risk and difficulty of wellbore construction are greatly enhanced, and meet mudstone stratum if bored, and drilling fluid inhibition is poor, and one
Denier causes mud stone section to collapse, and generates chip off-falling, that will be it is catastrophic because annular clearance is small, larger chip off-falling broken and carry
It is all relatively difficult, it causes to suppress leakage stratum or lock of tool drilling, causes underground complicated, so guaranteeing the wellbore stability of easy mud stone well section of collapsing
It is unimpeded and its crucial with wellbore rule.
The second object of the present invention is that the present invention is acted synergistically using organic and inorganic two kinds of inhibitor, meets enhancing suppression
Property processed, the effects of aggravating, while density of liquid phase is increased, solid concentration is reduced, there is the adjusting using drilling fluid rheology.
The third object of the present invention is that the plugging material that the present invention uses contains modified pitch, nanoemulsions, modified stone
The good novel process agent of the functions such as Na, calcium carbonate superfine powder.
The fourth object of the present invention is the strong rejection capability of the system formulation provided by the invention, strong seal-off effect, not only body
It is functional, and is conducive to reservoir protection, improves gas well yield.
A kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid, it includes following that it is raw materials used, which to prepare the drilling fluid,
The substance of mass percent：
Organic amine 0.3%；
Inorganic soluble salt 3%；
Mention stick 0.2%；
Fluid loss additive 1.5%；
Sealing agent 4.0%
Alkalinity control agent 0.05%；
Lubricant 1.5%；
Heavy weight additive 20%；
Surplus is water.
The organic amine is polyethylene polyamine.
The inorganic soluble salt is potassium chloride.
The stick that mentions is high adhesive aggregation anionic cellulose.PAC HV improves in drilling fluid
Drilling fluid viscosity, it is desirable that high adhesive aggregation anionic cellulose concentration 0.63% in deionized water, viscosimeter 600r/min reading >=
30。
The fluid loss additive is by these three processing of carboxymethyl starch, low adhesive aggregation anionic cellulose and sulfonated phenol formaldehyde resin
Agent is used in mixed way；The mass ratio of carboxymethyl starch, low adhesive aggregation anionic cellulose and sulfonated phenol formaldehyde resin three is（1-2）：1：
（1-2）.Low viscosity polyanionic cellulose in the present invention, mainly plays filtrate reducing in drilling fluid, it is desirable that low adhesive aggregation yin from
In deionized water, viscosimeter 600r/min reads≤90 to subbundle element concentration 0.30%.
The sealing agent is mixed by calcium carbonate superfine powder powder, sulfonated gilsonite powder and emulsified wax, calcium carbonate superfine powder powder, sulphur
The mass ratio for changing asphalt powder and emulsified wax is（2-3）：1：（1-2）.Calcium carbonate superfine powder refers to partial size at 1-25 μm in the present invention
Between calcium carbonate.
The alkalinity control agent is sodium hydroxide.
The lubricant is plant oil modified inorganic agent.Plant oil modified inorganic agent in the present invention is 100 by mass ratio：
（3-5）Gutter oil and the modified composition of surfactant A BS, the lubricant of composition be dispersed in water.
The heavy weight additive is agstone or blanc fixe.
A kind of preparation method of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid, it is characterised in that：
Preparation method is carried out at normal temperatures and pressures according to following procedure by formula rate：
1) clear water is packed by formula rate in slurry commanding tank；
2) according to formula rate, by alkalinity control agent, stick, fluid loss additive, sealing agent is mentioned, is sequentially added under slurry pumping action
In clear water, it is thoroughly mixed uniform, dissolution；
3) organic amine and inorganic soluble salt is added by formula rate again, is uniformly mixed, dissolves；
4）By formula rate, heavy weight additive is added, stirs evenly；
5）At the scene in use, the lubricant of proportion is added, stir evenly, abundant prehydration is configured to drilling fluid.
Present invention is mainly applied to Changqing Gas Fields gas well casing window sidetracking Mud Motors in Slim-hole Horizontal Well horizontal segment, lower curved sections to creep into
Construction, especially horizontal segment mud stone troublesome zone drilling are suitble to Mud Motors in Slim-hole Horizontal Well drilling to need.
Soviet Union's Sulige gas field is located at her Shan slope of Ordos Basin, current 5 1/2 ＂ sidetracking horizontal development well
Main gas-bearing layer position be upper palaeozoic Shihezi Formation stratum.In the process of development, horizontal reservoir, which inevitably bores, meets mud
Rock easily collapses well section, and well section shale hydration degree is high for these, easily collapses, and complexity, chip off-falling, collapsing easily occurs in underground；Reservoir is non-
Matter causes trajectory of horizontal adjustment frequently, and drilling period is long, once mudstone stratum complexity causes underground cleaning difficulty to increase, mud
Rock well section frictional resistance is significantly increased compared with sandstone well section frictional resistance, seriously affects later period drilling construction.In addition, horizontal segment follows tradition at present
Salt water polymer formulators, there is a problem, relatively good using polyamines high inhibition caving-preventing drilling fluid formula after being improved by formula
Solve problem above.
The present invention is small due to slim-hole wellbore（Relative to conventional big wellbore）, annular clearance is small, and cyclic pressure dissipation is big, pump pressure
Height is easy to suppress leakage stratum, and drilling tool rigidity is weaker in addition, easily causes drilling tool accident, and the risk and difficulty of wellbore construction greatly enhance,
If bore meet mudstone stratum, drilling fluid inhibition is poor, once cause mud stone section collapse, generate chip off-falling, that will be it is catastrophic,
Because annular clearance is small, the broken and carrying of larger chip off-falling is all relatively difficult, causes to suppress leakage stratum or lock of tool drilling, causes underground
Complexity, so guaranteeing that the wellbore stability of easy mud stone well section of collapsing and wellbore rule are unimpeded and its crucial.The present invention utilizes organic and inorganic
Two kinds of inhibitor synergistic effects the effects of meeting enhancing inhibition, aggravate, while increasing density of liquid phase, reduce solid phase and contain
Amount, there is the adjusting using drilling fluid rheology.The plugging material that the present invention uses contains modified pitch（Sulfonated gilsonite）, nano-emulsion
Liquid, Gai Shi Na（Emulsified wax）, the good novel process agent of functions such as calcium carbonate superfine powder.The system formulation provided by the invention
Strong rejection capability, strong seal-off effect, not only system is functional, and is conducive to reservoir protection, improves gas well yield.The present invention provides
Drilling fluid composition and compounding method the caving control of mud stone well section is acted on strong, performance is stable and easy to adjust, and density is relatively
Low, good rheological property effectively maintenance level section, the lower curved section mud stone borehole wall, holding borehole wall rule can combine protection reservoir
It needs, has not only been able to satisfy the needs of long horizontal sections drilling, but also well yield can be greatly improved, obtain good economic benefit and society
Benefit is worthy of popularization.Unspecified various reagents involved in the present invention are available reagent, can be directly in city
Field purchase.It is no longer described in detail in the present embodiment.
Embodiment 2：
A kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid, it includes following quality that it is raw materials used, which to prepare the drilling fluid,
The substance of percentage：
Organic amine 0.4%；
Inorganic soluble salt 5%；
Mention stick 0.4%；
Fluid loss additive 2.5%；
Sealing agent 6.0%
Alkalinity control agent 0.1%；
Lubricant 2.5%；
Heavy weight additive 40%；
Surplus is water.
The organic amine is polyethylene polyamine.
The inorganic soluble salt is potassium chloride.
The stick that mentions is high adhesive aggregation anionic cellulose.
The fluid loss additive is by these three processing of carboxymethyl starch, low adhesive aggregation anionic cellulose and sulfonated phenol formaldehyde resin
Agent is used in mixed way；The mass ratio of carboxymethyl starch, low adhesive aggregation anionic cellulose and sulfonated phenol formaldehyde resin three is（1-2）：1：
（1-2）.
The sealing agent is mixed by calcium carbonate superfine powder powder, sulfonated gilsonite powder and emulsified wax, calcium carbonate superfine powder powder, sulphur
The mass ratio for changing asphalt powder and emulsified wax is（2-3）：1：（1-2）.
The alkalinity control agent is sodium hydroxide.
The lubricant is plant oil modified inorganic agent.
The heavy weight additive is agstone or blanc fixe.
A kind of preparation method of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid,
Preparation method is carried out at normal temperatures and pressures according to following procedure by formula rate：
1) clear water is packed by formula rate in slurry commanding tank；
2) according to formula rate, by alkalinity control agent, stick, fluid loss additive, sealing agent is mentioned, is sequentially added under slurry pumping action
In clear water, it is thoroughly mixed uniform, dissolution；
3) organic amine and inorganic soluble salt is added by formula rate again, is uniformly mixed, dissolves；
4）By formula rate, heavy weight additive is added, stirs evenly；
5）At the scene in use, the lubricant of proportion is added, stir evenly, abundant prehydration is configured to drilling fluid.
Drilling fluid composition and compounding method provided by the invention act on by force the caving control of mud stone well section, and performance is stablized easy
In adjusting, density is relatively low, good rheological property, can effectively maintenance level section, the lower curved section mud stone borehole wall, keep borehole wall rule,
The needs for combining protection reservoir, had not only been able to satisfy the needs of long horizontal sections drilling, but also can greatly improve well yield, obtained good
Good economic benefit and social benefit, is worthy of popularization.
Embodiment 3：
A kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid, it includes following quality that it is raw materials used, which to prepare the drilling fluid,
The substance of percentage：
Organic amine 0.35%；
Inorganic soluble salt 4%；
Mention stick 0.3%；
Fluid loss additive 2.0%；
Sealing agent 5.0%
Alkalinity control agent 0.08%；
Lubricant 2.0%；
Heavy weight additive 30%；
Surplus is water.
The organic amine is polyethylene polyamine.
The inorganic soluble salt is potassium chloride.
The stick that mentions is high adhesive aggregation anionic cellulose.
The fluid loss additive is by these three processing of carboxymethyl starch, low adhesive aggregation anionic cellulose and sulfonated phenol formaldehyde resin
Agent is used in mixed way；The mass ratio of carboxymethyl starch, low adhesive aggregation anionic cellulose and sulfonated phenol formaldehyde resin three is（1-2）：1：
（1-2）.
The sealing agent is mixed by calcium carbonate superfine powder powder, sulfonated gilsonite powder and emulsified wax, calcium carbonate superfine powder powder, sulphur
The mass ratio for changing asphalt powder and emulsified wax is（2-3）：1：（1-2）.
The alkalinity control agent is sodium hydroxide.
The lubricant is plant oil modified inorganic agent.
The heavy weight additive is agstone or blanc fixe.
A kind of preparation method of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid, it is characterised in that：
Preparation method is carried out at normal temperatures and pressures according to following procedure by formula rate：
1) clear water is packed by formula rate in slurry commanding tank；
2) according to formula rate, by alkalinity control agent, stick, fluid loss additive, sealing agent is mentioned, is sequentially added under slurry pumping action
In clear water, it is thoroughly mixed uniform, dissolution；
3) organic amine and inorganic soluble salt is added by formula rate again, is uniformly mixed, dissolves；
4）By formula rate, heavy weight additive is added, stirs evenly；
5）At the scene in use, the lubricant of proportion is added, stir evenly, abundant prehydration is configured to drilling fluid.
Drilling fluid composition and compounding method provided by the invention act on by force the caving control of mud stone well section, and performance is stablized easy
In adjusting, density is relatively low, good rheological property, can effectively maintenance level section, the lower curved section mud stone borehole wall, keep borehole wall rule,
The needs for combining protection reservoir, had not only been able to satisfy the needs of long horizontal sections drilling, but also can greatly improve well yield, obtained good
Good economic benefit and social benefit, is worthy of popularization.Soviet Union's Sulige gas field is located at her Shan slope of Ordos Basin, and current 5
The main gas-bearing layer position of 1/2 ＂ sidetracking horizontal development well is upper palaeozoic Shihezi Formation stratum.In development process
In, horizontal reservoir, which inevitably bores, meets mud stone and easily collapses well section, and well section shale hydration degree is high for these, easily collapses, underground
Easily there is complicated, chip off-falling, collapsing；Reservoir heterogeneity causes trajectory of horizontal adjustment frequently, and drilling period is long, once mud stone
Layer complexity causes underground cleaning difficulty to increase, and mud stone well section frictional resistance is significantly increased compared with sandstone well section frictional resistance, seriously affects later period brill
Into construction.In addition, horizontal segment follows traditional salt aqueous polymer formula at present, it there is a problem, after being improved by formula, using more
Amine high inhibition caving-preventing drilling fluid formula, relatively good solves problem above.
Embodiment 4：
In the present embodiment, it is raw materials used to prepare the drilling fluid for a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid
Substance including following mass percents：Sequentially added in 59.95% clear water 0.05% alkalinity control agent, 0.2% mention stick,
2.5% fluid loss additive,（Fluid loss additive is by 1.0% carboxymethyl starch, 0.5% low adhesive aggregation anionic cellulose and 1.0% sulfonated phenolic
Resin composition）, 5.4% sealing agent,（Sealing agent is 3.0% calcium carbonate superfine powder powder, 1.4% sulfonated gilsonite powder and 1.0% emulsified wax group
At）, it is thoroughly mixed uniform, dissolution；0.4% organic amine and 5.0% inorganic soluble salt are added, is uniformly mixed, is molten
Solution；By live density requirements, 25% heavy weight additive is added, wherein heavy weight additive is blanc fixe, is stirred evenly；At the scene in use, root
1.5% lubricant is added according to actual needs, wherein lubricant is plant oil modified inorganic agent；It stirs evenly, abundant prehydration is matched
Drilling fluid is made.
One, test performance is tested
According to drilling fluid test index method, basic performance is as shown in table 1,
A kind of proportion property of drilling fluid of table 1
| Serial number | Performance title | Index |
| 1 | Density, g/cm3 | 1.24~1.32 |
| 2 | FV, sec. | 55~79 |
| 3 | API FL, mL | 1.7~2.0 |
| 4 | HTHP FL, mL | 5.6~7.0 |
| 5 | pH | 8~9 |
| 6 | PV, mPas | 22~31 |
| 7 | YP, Pa | 9~15 |
| 8 | 6RPM | 4~8 |
Two, it according to above-mentioned composition and ratio, is prepared at the scene according to above-mentioned preparation procedure, to Soviet Union Sulige gas field gas well casing sidetracking side
Horizontal well drilling S36-X-X well carries out field experiment, and last completion interval of well depth 4239m, the horizontal segment length 600m of Shihezi Formation are drilled most
Long mud stone continuous segment 123m.Use of the well by the formula, the mud stone well section in horizontal segment drilling process, wellbore stability rise
It is lower to bore smoothly, have the function that stabilizing borehole, safety in production.Its technical indicator is as shown in table 1.
Embodiment 5：
In the present embodiment, it is raw materials used to prepare the drilling fluid for a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid
Substance including following mass percents：0.05% alkalinity control agent is sequentially added in 59.75% clear water（Sodium hydroxide）,0.3%
Stick, 2.0% fluid loss additive are mentioned,（Fluid loss additive is by 0.5% carboxymethyl starch, 0.5% low adhesive aggregation anionic cellulose and 1.0% sulphur
Change phenolic resin composition）, 6.0% sealing agent,（Sealing agent is 3.0% calcium carbonate superfine powder powder, 1.0% sulfonated gilsonite powder and 2.0% emulsification
Paraffin composition）, it is thoroughly mixed uniform, dissolution；0.4% organic amine and 5.0% inorganic soluble salt are added, is stirred
Even, dissolution；By live density requirements, 25% heavy weight additive is added, wherein heavy weight additive is blanc fixe, is stirred evenly；It uses at the scene
In, 1.5% lubricant is added according to actual needs, wherein lubricant is plant oil modified inorganic agent；It stirs evenly, abundant pre- water
Change, is configured to drilling fluid.
One, test performance is tested
According to drilling fluid test index method, basic performance is as shown in table 2,
A kind of proportion drilling fluid basic performance of table 2
| Serial number | Performance title | Index |
| 1 | Density, g/cm3 | 1.25~1.30 |
| 2 | FV, sec. | 52~73 |
| 3 | API FL, mL | 1.5~2.0 |
| 4 | HTHP FL, mL | 5.8~7.0 |
| 5 | pH | 8-9 |
| 6 | PV, mPas | 21~33 |
| 7 | YP, Pa | 8~15 |
| 8 | 6RPM | 4~9 |
Two, it according to above-mentioned composition and ratio, is prepared at the scene according to above-mentioned preparation procedure, to Soviet Union's Sulige gas field casing window sidetracking gas
Well water horizontal well T2-X-X well carries out field test, stratum Shihezi Formation, finishing drilling well depth 4200m, 700 m of horizontal segment drilling depth, water
Flat section is bored altogether meets mud stone 153m, and the continuous mud stone well section 98m wellbore construction each process of longest is smooth.
Its property of drilling fluid of constructing is as shown in table 2, which makes a trip smoothly in horizontal segment work progress, and shaft bottom is clean,
Frictional resistance is relatively small, and mud stone well section is in drilling well without bad display.In addition, drilling fluid composition field application of the present invention the result shows that
More traditional drilling fluid composition is compared, and system formulation has further development, functional, reduces the generation of down-hole accident, section
Drilling cost and drilling time have been saved, good economic benefit is obtained.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.The examination that the present embodiment does not describe in detail
Agent is that available reagent can directly be bought in market, and the present invention does not describe one by one herein.
Claims (10)
1. a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid, it is characterised in that：Prepare original used in the drilling fluid
Material includes the substance of following mass percents：
Organic amine 0.3~0.4%；
Inorganic soluble salt 3~5%；
Mention stick 0.2~0.4%；
Fluid loss additive 1.5~2.5%；
Sealing agent 4.0~6.0%
Alkalinity control agent 0.05~0.1%；
Lubricant 1.5~2.5%；
Heavy weight additive 20~40%；
Surplus is water.
2. a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid according to claim 1, it is characterised in that：
The organic amine is polyethylene polyamine.
3. a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid according to claim 1, it is characterised in that：
The inorganic soluble salt is potassium chloride.
4. a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid according to claim 1, it is characterised in that：
The stick that mentions is high adhesive aggregation anionic cellulose.
5. a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid according to claim 1, it is characterised in that：
The fluid loss additive is made by the mixing of carboxymethyl starch, low adhesive aggregation anionic cellulose and these three inorganic agents of sulfonated phenol formaldehyde resin
With；The mass ratio of carboxymethyl starch, low adhesive aggregation anionic cellulose and sulfonated phenol formaldehyde resin three is（1~2）：1：（1~2）.
6. a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid according to claim 1, it is characterised in that：
The sealing agent is mixed by calcium carbonate superfine powder powder, sulfonated gilsonite powder and emulsified wax, calcium carbonate superfine powder powder, sulfonated gilsonite powder
Mass ratio with emulsified wax is（2~3）：1：（1~2）.
7. a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid according to claim 1, it is characterised in that：
The alkalinity control agent is sodium hydroxide.
8. a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid according to claim 1, it is characterised in that：
The lubricant is plant oil modified inorganic agent.
9. a kind of gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid according to claim 1, it is characterised in that：
The heavy weight additive is agstone or blanc fixe.
10. the preparation of any one gas well horizontal well slim-hole polyamines high inhibition caving-preventing drilling fluid as claimed in claims 1-9
Method, it is characterised in that：
Preparation method is carried out at normal temperatures and pressures according to following procedure by formula rate：
1) clear water is packed by formula rate in slurry commanding tank；
2) according to formula rate, by alkalinity control agent, stick, fluid loss additive, sealing agent is mentioned, is sequentially added under slurry pumping action
In clear water, it is thoroughly mixed uniform, dissolution；
3) organic amine and inorganic soluble salt is added by formula rate again, is uniformly mixed, dissolves；
4）By formula rate, heavy weight additive is added, stirs evenly；
5）At the scene in use, the lubricant of proportion is added, stir evenly, abundant prehydration is configured to drilling fluid.
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| CN114672293A (en) * | 2020-12-24 | 2022-06-28 | 中国石油化工股份有限公司 | Shielding temporary plugging drilling completion fluid suitable for clastic rock reservoir and preparation method thereof |
| CN114672293B (en) * | 2020-12-24 | 2023-09-08 | 中国石油化工股份有限公司 | Shielding temporary plugging drilling and completion fluid suitable for clastic rock reservoir and preparation method thereof |
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| CN116064000A (en) * | 2021-11-03 | 2023-05-05 | 中国石油天然气集团有限公司 | Strong-inhibition anti-collapse drilling fluid for soilless-phase amine salt for quickly drilling small well holes and preparation method thereof |
| CN115491187A (en) * | 2022-08-08 | 2022-12-20 | 成都理工大学 | Multifunctional rock-carrying anti-collapse engineering material and preparation method and application thereof |
| CN115491187B (en) * | 2022-08-08 | 2023-07-07 | 成都理工大学 | Multifunctional collapse-preventing engineering material with rock and preparation method and application thereof |
| CN115895619A (en) * | 2022-11-11 | 2023-04-04 | 长江大学 | Well wall strengthening slug slurry and large-displacement well wall strengthening method |
| CN115895619B (en) * | 2022-11-11 | 2024-03-26 | 长江大学 | Well wall strengthening slug slurry and well wall strengthening method for large-displacement well |
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Application publication date: 20181116 |