CN1309799C - Low foamability drilling fluid and its preparation method - Google Patents
Low foamability drilling fluid and its preparation method Download PDFInfo
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- CN1309799C CN1309799C CNB2004100580643A CN200410058064A CN1309799C CN 1309799 C CN1309799 C CN 1309799C CN B2004100580643 A CNB2004100580643 A CN B2004100580643A CN 200410058064 A CN200410058064 A CN 200410058064A CN 1309799 C CN1309799 C CN 1309799C
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Abstract
The present invention relates to a low-foamability drilling fluid which contains slurry and a modified auxiliary agent containing modified alkyl glycoside, and a preparation method of the low-foamability drilling fluid. The volume of the modified auxiliary agent accounts for 1 to 50% of the volume of the slurry. The modified auxiliary agent is a final reaction product prepared according to the method which comprises the following steps: starch and low-carbon alkyl are mixed; with the existence of a catalyst, glycosidation reaction is carried out, which generates a reaction product which contains low-carbon alkyl glycoside; a sulfonation reagent and aldehyde are added into the product; at the temperature of (50 to 100)+/-5 DEG C, the reaction is continuously and thoroughly carried out, a final reaction mixture is obtained, and the final reaction mixture is the modified auxiliary agent which contains the alkyl glycoside modified by sulfonyl alkyl. The absorbability of the drilling fluid which contains the modified auxiliary agent is further strengthened, the capability of reacting with bentonite is further strengthened, the capability of viscosity reduction and the rejection capability of preventing collapse are good, the temperature resistance is high, the foamability is eliminated, and the low-foamability drilling fluid is suitable for drilling operation of middle-depth wells, deep wells or ultra deep wells.
Description
Technical field
The present invention relates to a kind of drilling fluid, saying so further relates to a kind of low whipability drilling fluid by the alkyl glycoside compound of sulfoalkyl modification and preparation method thereof that contains.
Background technology
Alkyl glycoside is an eco-friendly green surfactant of new generation, and external the nineties just realizes suitability for industrialized production.It is a kind of nonionogenic tenside, and raw materials used is to be derived and next glucose and Fatty Alcohol(C12-C14 and C12-C18) the alkyl glycoside totally biodegradable by reproducible natural resources.This class tensio-active agent is owing to its nontoxic, non-stimulated and outstanding surfactivity is widely used in fields such as washing composition, makeup, food and medicine.The length of used Fatty Alcohol(C12-C14 and C12-C18) carbochain is divided into the low-carbon alkyl glucosides (alkyl is C1～C7) and high-carbon alkyl glycoside (alkyl be C8 and more than) when synthetic according to it.
Current high-carbon C
8-18Series alkyl glycoside successful Application at cosmetic humectant and shampoo and field of medicaments.The application of alkyl glycoside in oilfield chemistry is at the early-stage.There was a little high-carbon alkyl glycoside to be used in report in the displacement of reservoir oil of oil field in recent years, and only limit to methylglycoside for the research of low-carbon alkyl glucosides, abroad the beginning of the nineties methyl glucoside is applied in the drilling fluid, and successfully solves the hole stability problem of water-sensitive strata and other bad ground.But the methylglycoside dosage is very big in the application process, and cost is higher, can't large-scale promotion.
At present, the hole stability problem is still one of subject matter that well borer author faces.The manifestation of borehole well instability is mainly undergauge, hole enlargement, bit freezing and down hole problem.And drilling fluid and mud shale stratum generation physics chemical action and the shale hydration that causes is the one of the main reasons of well unstability.Therefore, suppressing to greatest extent that shale hydration expands, disperses is one of fundamental way that solves borehole well instability.Alkyl glycoside is the poly-hydroxy acetal, the poly-hydroxy good hydrophilic property, the aquation thickness, non-polar group can improve the surfactivity of product, therefore alkyl glycoside can improve the activity of water in mud shale membrane efficiency, the reduction drilling fluid significantly, and they can successfully suppress water molecules in the strong adsorption of the borehole wall and enter the borehole wall, so their anti-collapse effect is extremely strong, can be used as efficient anti-collapse dose in drilling fluid.But alkyl glycoside is a tensio-active agent, when using the foaming phenomenon is arranged, and foam stabilization is not easy to remove, and increases the weight of along with the growth of carbochain, thereby has limited ethyl glucoside and the longer application of alkyl glycoside in reinforcing oil well liquid and drilling fluid of carbochain thereof.Therefore the application surface that the foaming phenomenon of eliminating it is widened it is the important research direction of alkyl glycoside in oilfield chemistry is used.
Summary of the invention
The contriver by low-carbon alkyl glucosides (C1～C7 alkyl glycoside) is carried out molecular designing, has carried out further modification to the low-carbon alkyl glucosides on this basis in experiment: promptly introduce new group---sulfoalkyl on the low-carbon alkyl glucosides.Alkyl glycoside is introduced sulfoalkyl on the basis, the alkyl glycoside that belongs to nonionic surface active agent is modified as the sulfoalkyl alkyl glycoside of aniorfic surfactant.Its adsorptivity is further strengthened, also further strengthen with the ability of bentonitic effect, viscosity reduction ability, anti-collapse inhibition are better than alkyl glycoside, introduce temperature resistance that sulfoalkyl improved the low-carbon alkyl glucosides greatly, water-soluble and eliminate its foaming phenomenon simultaneously, make the long alkyl glycoside of carbochain also have well water-soluble, can efficient application in well cementation liquid and drilling fluid, thereby make modification alkyl glycoside be more suitable for being used for the mud conditioner that middle-deep well or ultra deep well creep into.
The contriver is following reactional equation to the modified-reaction mechanism summary of alkyl glycoside:
Therefore, the purpose of this invention is to provide a kind of drilling fluid that contains by the alkyl glycoside compound of sulfoalkyl modification;
Another object of the present invention provides the preparation method of described drilling fluid.
A kind of drilling fluid provided by the invention includes mud and a kind of modified additive that contains the modification alkyl glycoside, and wherein said modified additive accounts for 1～50% of mud volume, is preferably 1～20%.
The modification alkyl glycoside compound that contains in this modified additive is the alkyl glycoside of sulfoalkyl modification, has following general structure I:
Wherein R1, R2 are selected from hydrogen or sulfoalkyl respectively.R1, R2 are inequality, and promptly R1, R2 are not hydrogen simultaneously or are sulfoalkyl simultaneously.The molecular formula of described sulfoalkyl is-C
mH
2m(SO
3Na), wherein m is 1～3 integer, is preferably 1; X is equal to or greater than 1 integer in the general formula, is preferably 1～10 integer; N is 1～7 integer in the general formula, is preferably 2～4 integer.
The general formula of above-described modification alkyl glycoside compound comprises the isomer of this modification alkyl glycoside compound.
A kind of modified additive that contains modification alkyl glycoside compound that drilling fluid of the present invention comprised is the final reacting product that makes according to the method that may further comprise the steps:
A. the preparation of low-carbon alkyl glucosides: starch and low-carbon alcohol are carried out reaction of guanosine in the presence of catalyzer, obtain containing the reaction product of low-carbon alkyl glucosides;
B. the preparation of modification alkyl glycoside: the sulfonated reagent of 50～100%wt of starch gross weight that adding in the product that step a obtains adds, with the aldehyde that is equivalent to starch gross weight 15～35%wt, in (50～100) ± 5 ℃, after being preferably (50～90) ± 5 ℃ following continuation sufficient reacting, the final reacting mixture that obtains is described modified additive, wherein contains the alkyl glycoside of sulfoalkyl modification.
The above step a is the preparation of low-carbon alkyl glucosides.The preparation of alkyl glycoside in the prior art is existing technology, as United States Patent (USP): US 2,276,621; US 2,390, and 507; US 2,606, and 186; US3,296,245; US 3,375, and 243 etc.; Chinese patent application: CN 1128265A; CN 1030763A etc.Therefore, here step a can be with reference to the preparation method of existing low-carbon alkyl glucosides in the various prior aries.Also can preferably prepare the low-carbon alkyl glucosides according to the method that may further comprise the steps:
A1. with starch and low-carbon alcohol with 1: 0.3～1: 20, be preferably 1: 1～1: 5 weight ratio mixes, in order to ensure starch complete reaction as far as possible, the content of low-carbon alcohol is excessive;
A2. in above mixture, add the total add-on 1～8%wt of low-carbon alcohol, be preferably the catalyzer of 3～5%wt;
A3. with above-mentioned mixing raw material under temperature (80～170) ± 5 ℃, fully reaction in reactor;
A4. transfer pH value to alkalescence the reaction product of step a3, obtain containing the reaction product of low-carbon alkyl glucosides;
To be selected from n be 1～7 C to low-carbon alcohol among the above step a
nH
2n+1At least a among the OH, preferred n is 2～4 C
nH
2n+1At least a among the OH; Described starch can be selected from any starch that can get in the prior art, at least a in the following starch generally commonly used: W-Gum, wheat starch, sweet potato starch, Starch rice.
Catalyzer is selected from least a of mineral acid, organic acid, tosic acid pyridinium salt or 2,4,6-tri-methyl p-toluenesulfonate quinolinium among the preparation process a2 of the above low-carbon alkyl glucosides.Wherein mineral acid is preferably from sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid etc.; Organic acid is preferably from C
2-8Sulfo group carboxylic acid, tosic acid, sulfo-succinic acid, Witco 1298 Soft Acid, dodecyl sulphate, alkyl naphthalene sulfonic acid, phenylformic acid etc.The above material all can be commercially available and be got.
Among the preparation process a3 of the above low-carbon alkyl glucosides, temperature of reaction is preferably (110～150) ± 5 ℃; Reaction is generally carried out under normal pressure; Whether the reaction times visual response is fully decided, and generally is at least 1～8 hour, preferably is at least 2～5 hours.
The reaction product that among the preparation process a4 of the above low-carbon alkyl glucosides step a3 is obtained transfers pH value to be alkalescence, the one, in order to prevent that alkyl glycoside from reversed reaction can take place regenerate sugar and Fatty Alcohol(C12-C14 and C12-C18) under acidic conditions, the preparation feedback of step b modification alkyl glycoside preferably carries out under alkaline condition in addition.PH value preferably is adjusted to 8～11 in this step, and more excellent is 9～10.
Sulfonated reagent is selected from one or more in sodium bisulfite, sodium sulphite or the Sodium Pyrosulfite among the preparation process b of the above modification alkyl glycoside; The sulfonated reagent add-on be preferably add 55～80%wt of starch gross weight.The add-on of described formaldehyde be preferably add 15～30%wt of starch gross weight, if used during reaction be that the aqueous solution of formaldehyde is mete-wand with wherein contained formaldehyde amount then.For low-carbon alkyl glucosides in the reaction product that ensures step a transforms as far as possible fully, the consumption of aldehyde and sulfonated reagent is excessive in this step.Reaction is generally carried out under normal pressure among the step b.Whether the reaction times visual response is fully decided, and the general reaction times was at least 1～7 hour.
Among the preparation method of above-described described modified additive, the productive rate of low-carbon alkyl glucosides is generally 95% in the preparation of the low-carbon alkyl glucosides of step a, and the productive rate of the sulfoalkyl alkyl glycoside of step b is generally 90%.
By above-described step, the alkyl glycoside product that the sulfoalkyl that obtains replaces can be handled by process for purification of the prior art, as methods such as filtration, separation, extraction, distillation, rectifying.Sulfoalkyl alkyl glycoside after the purification can characterize by characterizing methods such as infrared, nuclear-magnetisms of the prior art.
Among the preparation method of the modified additive that above-described drilling fluid of the present invention is contained, in the preparation of the low-carbon alkyl glucosides of step a, described starch can feed intake for substep: after being about to a starch and passing through described step a1, a2, a3 with total low-carbon alcohol, with the reaction mixture of another part starch and step a3, under with the same temperature of step a3, pressure condition, react again; After the starch input finishes, pass through described step a4 again, obtain containing the reaction product of low-carbon alkyl glucosides; The amount of starch that described per step throws is 0.05～50%wt of starch total amount, is preferably 30～50%wt of starch total amount.Starch is disposable feed intake or substep feeds intake and generally depends on the circumstances, because starch is insoluble to Fatty Alcohol(C12-C14 and C12-C18), if the starch total amount is big, can makes after the reaction beginning just all adds and stir difficulty, reaction is slow, and starch is also stuck with paste because being heated inequality easily.Speed of response is accelerated, nor stuck with paste easily.
The present invention learns after deliberation, on the alkyl glycoside basis, introduce the modification alkyl glycoside compound that sulfoalkyl obtains, make the alkyl glycoside of the tensio-active agent of non-ionic type change into the sulfoalkyl alkyl glycoside of the tensio-active agent of anionic, thereby strengthened water-soluble, the adsorptivity of this compound, weakened whipability.Adsorptivity strengthens further increases compound and bentonitic ability to function, viscosity reduction ability, anti-collapse inhibition all are better than alkyl glycoside, introduce the temperature resistance that sulfoalkyl has improved compound greatly simultaneously, thereby make it be more suitable for being used for the mud conditioner that middle-deep well or ultra deep well creep into.
Modification alkyl glycoside compound in the modified additive that contains in this drilling fluid composition provided by the invention has above-described general structure I, can be a kind of modification alkyl glycoside described in the general structure, also can be more than one modification alkyl glycoside and/or its mixture of isomers described in the general structure; Be preferably sulfomethylated alkyl glycoside, wherein alkyl is the alkyl of C1～C7, and more preferably the alkyl of C2～C4 most preferably is sulfomethylation ethyl glucoside and/or sulfomethylation propyl group glucosides.
Also can include the used auxiliary agent of drilling fluid in the prior art in the drilling fluid of the present invention: be mainly high molecular polymkeric substance as the stick of carrying commonly used in the drilling fluid, as polyacrylamide or vinylformic acid and acrylamide copolymer class etc., as big potassium (KPAM), 80A-51, FA-367, VAMA etc.; The molecular weight of viscosity-depression agent is littler than the molecular weight of carrying stick, as little potassium (KPAN), NH4PAN, sulfonation tannin, XY-27 etc.; Fluid loss agent mainly contains carboxymethyl cellulose, humic-acid kind, sulfonated-pheno-formoldehyde resin, valchovite etc.The consumption of above auxiliary agent is a conventional amount used of the prior art.
The preparation method of drilling fluid of the present invention may further comprise the steps:
A. the preparation of low-carbon alkyl glucosides: starch and low-carbon alcohol are carried out reaction of guanosine in the presence of catalyzer, obtain containing the reaction product of low-carbon alkyl glucosides;
B. the sulfonated reagent of 50～100%wt of starch gross weight that adding in the reaction product that step a obtains adds, with the formaldehyde that is equivalent to starch gross weight 15～35%wt, in (50～100) ± 5 ℃, after being preferably (50～90) ± 5 ℃ following continuation sufficient reacting, the final reacting product that obtains is described modified additive, wherein contains the alkyl glycoside of sulfoalkyl modification;
C. the final reacting product that will obtain by step b, to be described modified additive with the component that comprises mud mix obtains described drilling fluid, and wherein modified additive accounts for 1～50% of mud volume, at the oil well of generalized case, take into account effect and cost problem, be preferably 1～20%.
Step a～b of the invention described above drilling fluid composition preparation method is a kind of preparation method who contains the modified additive of modification alkyl glycoside compound provided by the present invention, and the particular content of step a～b is all ditto described.In the preparation of the low-carbon alkyl glucosides of wherein said step a, described starch also can feed intake for substep, be about to a starch and total low-carbon alcohol through described step a1, a2, a3 after, again another part starch is mixed with the reaction product of step a3, under with the same temperature of step a3, pressure condition, react; After the starch input finishes, pass through described step a4 again, obtain containing the reaction product of low-carbon alkyl glucosides; The amount of starch that described per step throws is 0.05～50%wt of starch total amount, preferred 30～50%wt.
Among the invention described above drilling fluid composition preparation method's the step c, described modified additive can be that the final reacting product that step b obtains directly adds mud by described consumption; Also can be to add reaction product that step b obtains goes out the alkyl glycoside of sulfoalkyl modification through purification after.Modified additive of the present invention is because the alkyl glycoside of sulfoalkyl modification is wherein given to the improved effect of drilling fluid.Mud and other adjuvant component all are used mud and auxiliary agents in the disclosed drilling fluid in the prior art.Adopt equipment such as mixing equipment used in the prior art such as stirrer to mix.
The alkyl glycoside of the sulfoalkyl modification that contains in the modified additive that the present invention relates to has overcome blistered shortcoming on the basis that keeps the alkyl glycoside advantage.And effectively increase the water-soluble of it after introducing sulfoalkyl on the alkyl glycoside, and improved its temperature resistance ability, make the long alkyl glycoside of carbochain also have appropriate H LB and (characterize the performance of hydrophilic and oleophilic, it is hydrophilic that this is worth big material, this is worth little material oleophylic) value, thereby in fine be applied to cement the well liquid and the drilling fluid.Introduce adsorptivity behind the sulphur methyl on the alkyl glycoside, also further strengthen with bentonitic ability to function, viscosity reduction ability, anti-collapse inhibition all are better than alkyl glycoside, thereby make mud that it is more suitable for being used for middle-deep well or ultra deep well and creeps into, grout treatment agent etc.
The alkyl glycoside of the sulfoalkyl modification that contains in the modified additive that the present invention relates to belongs to anion surfactant, viscosity reduction dispersion effect to prehydration wilkinite and grout is very good, the treatment agent molecule is preferentially adsorbed on bentonite clay particle and cement particle surface, break the card house structure between bentonite clay particle strongly, free water is discharged from the network parcel, increase the flowability of slurry.The performance of this treatment agent is better than conventional low-molecular(weight)polymer viscosity-depression agent, and is not subjected to drilling fluid pH value, Temperature Influence, can improve the solid phase capacity of drilling fluid, can be used as viscosity-depression agent and dispersion agent in the grout and retardant in the drilling fluid.
The alkyl glycoside of the sulfoalkyl modification that contains in the modified additive that the present invention relates to can also well be stablized clay particle; prevent that clay particle from expanding, disperse, migrating and the obstruction gas channel; simultaneously; also can make rock be reversed to the oleophylic interface by hydrophilic interface; reduce oil flow resistance, reach protection hydrocarbon zone purpose.
They and conventional processing agent compatibleness is good, oilness is good, not the contaminated oil gas-bearing formation, can resist 180 ℃ of high temperature and can biological degradation, free from environmental pollution.Can be used on the oil drilling on the various stratum of various blocks, especially responsive block and ultra deep well and geothermal well.
The alkyl glycoside of the sulfoalkyl modification that contains in the modified additive that the laboratory proof the present invention relates to is applied in the oilfield chemistry treatment agent very effective.Be better than the low-carbon alkyl glucosides aspect stabilizing borehole, and its temperature resistance will be apparently higher than alkyl glycoside, and non-foaming in drilling fluid is used, do not carry stickingly, is good borehole wall stabilizer, especially applicable to ultra deep well or geothermal well.
The effect that contains the drilling fluid of described modified additive of the present invention is summarized as follows:
(1) raw material sources are wide, and cost is low, manufacture craft safety, simple.
(2) good water solubility of modified additive wherein, drilling fluid is non-foaming.
(3) can significantly improve the mud shale membrane efficiency in drilling fluid, reduce the activity of water in the drilling fluid, caving-preventing characteristic is good
(4) viscosity reducing effect is good, is better than conventional low-molecular(weight)polymer viscosity-depression agent
(5) have good lubricity, contamination resistance is pollution-free to hydrocarbon zone
(6) temperature resistance is extremely strong, can be used for ultra deep well and geothermal well
(7) wherein modified additive and other treatment agent compatibleness are good, and property of drilling fluid is not influenced by any treatment agent
(8) biodegradable, nontoxic, do not cause environmental pollution
Starch as base with 4% slope soil paste, add described modified additive that its volume 2% contains sulphur methyl-propyl glucosides and starch as a comparison and compare experiment, the result is as follows:
R
S(the rolling rate of recovery) raising rate 〉=50%;
Rate of expansion reduced rate 〉=40%;
Apparent viscosity energy reduced rate 〉=70%;
Frictional coefficient reduced rate 〉=20%;
The mud shale infiltration recovers rate of increase 〉=19%.
Dispersion effect is obvious in grout, and certain delayed coagulation is arranged.
Embodiment
Further describe the present invention below in conjunction with embodiment.Scope of the present invention is not subjected to the restriction of these embodiment, and scope of the present invention proposes in claims.
One, preparation experiment
In following examples, in the raw material of reaction usefulness, W-Gum, methyl alcohol, ethanol, propyl alcohol, butanols, amylalcohol, hexanol, enanthol, sulfuric acid, hydrochloric acid, phosphoric acid, Sodium dodecylbenzene sulfonate, tosic acid pyridinium salt, sodium hydroxide, sodium bisulfite, S-WAT, formaldehyde, acetaldehyde, propionic aldehyde etc. all are conventional chemical, are commercially available.
Embodiment 1
Take by weighing 100 gram exsiccant W-Gums with electronic balance, add 60 gram anhydrous methanols (chemical pure), concentration 50%wt sulfuric acid 9 grams mix with stirrer, pour in the reactor that whipping appts is housed, reaction is after about 2 hours down at 85 ± 5 ℃, and the taking-up reaction product adds 100 gram dried corn starch again in reaction product, stir, pour in the reactor, reacted 1.6 hours, obtain the syrupy shape thick liquid; The sodium hydroxide solution that adds concentration 40%wt is transferred pH value to 9, must contain the reaction product of methylglycoside
B1Be cooled to 55 ± 5 ℃ and add sodium bisulfite 110 gram then and concentration is formaldehyde solution 100 grams of 37%wt, open to stir to continue to react and promptly got the final reacting product that contains the sulfomethylation methylglycoside in 2 hours
A1
Embodiment 2
Weigh in the balance and get 100 gram exsiccant W-Gums, add 100 gram dehydrated alcohols (chemical pure), add concentration 50%wt phosphoric acid (chemical pure) 15 grams, mix with stirrer, pour in the reactor that whipping appts is housed, reaction is after about 4 hours down at 120 ℃ ± 5 ℃, and the taking-up reaction product adds 100 gram dried corn starch again in reaction product, stir, pour in the reactor, reacted 4 hours, obtain the syrupy shape thick liquid; The sodium hydroxide solution that adds concentration 40%wt is transferred pH value to 11, must contain the reaction product of ethyl glucoside
B2Be cooled to 90 ± 5 ℃ then and add sodium bisulfite 130 gram again and concentration is acetaldehyde solution 126 grams of 37%wt, open to stir to continue to react and promptly got the final reacting product that contains the sulfoethyl ethyl glucoside in 1 hour
A2
Embodiment 3:
Take by weighing 100 gram exsiccant W-Gums with electronic balance, add 100 gram dehydrated alcohols (chemical pure), concentration 37%wt hydrochloric acid 13.5 grams mix with stirrer, pour in the reactor that whipping appts is housed, reaction is after about 1 hour down at 130 ± 5 ℃, and the taking-up reaction product adds 100 gram dried corn starch again in reaction product, stir, pour in the reactor, reacted 0.6 hour, obtain the syrupy shape thick liquid; The sodium hydroxide solution that adds concentration 40%wt is transferred pH value to 9, must contain the reaction product of ethyl glucoside
B3, be cooled to 60 ± 5 ℃ and add S-WAT 120 gram then and concentration is formaldehyde solution 86 grams of 37%wt, open to stir to continue to react and promptly got the final reacting product that contains sulphur methylethyl glucosides in 2 hours
A3
Embodiment 4:
Weigh in the balance and get 100 gram exsiccant W-Gums, add anhydrous methanol (chemical pure) 30 grams, dehydrated alcohol (chemical pure) 50 grams, Witco 1298 Soft Acid 8 grams, mix with stirrer, pour in the reactor that whipping appts is housed, after reacting about 2 hours under 100 ± 5 ℃, take out reaction product, in reaction product, add 100 gram exsiccant W-Gums again, stir, pour in the reactor, reacted 1.5 hours, and obtained the syrupy shape thick liquid; The sodium hydroxide solution that adds concentration 40%wt is transferred pH value to 9, obtains containing the reaction product of methylglycoside, ethyl glucoside
B4, be cooled to 50 ± 5 ℃ and add sodium bisulfite 100 gram then and concentration is formaldehyde solution 90 grams of 37%wt, open to stir to continue to react and promptly got the final reacting product that contains sulfomethylation methylglycoside, sulfomethylation ethyl glucoside in 3 hours
A4
Embodiment 5:
Take by weighing 100 gram exsiccant W-Gums with electronic balance, add 200 gram propyl alcohol (chemical pure), 6 gram tosic acid pyridinium salts mix with stirrer, pour in the reactor that whipping appts is housed, reaction is after about 1 hour down at 130 ± 5 ℃, and the taking-up reaction product adds 100 gram dried corn starch again in reaction product, stir, pour in the autoclave, reacted 1.5 hours, obtain the syrupy shape thick liquid; The sodium hydroxide solution that adds concentration 40%wt is transferred pH value to 10, obtains containing the reaction product of propyl group glucosides
B5, be cooled to 70 ± 5 ℃ and add S-WAT 170 gram then and concentration is acetaldehyde solution 126 grams of 37%wt, open to stir and continue reaction end in 5 hours, promptly get the final reacting product that contains sulfoethyl propyl group glucosides
A5
Embodiment 6:
Weigh in the balance and get 100 gram exsiccant W-Gums, add 400 gram propyl carbinols (chemical pure), hydrochloric acid 21 grams of concentration 37%wt mix with stirrer, pour in the reactor that whipping appts is housed, reaction is after about 2 hours down at 135 ± 5 ℃, and the taking-up reaction product adds 100 gram dried corn starch again in reaction product, stir, pour in the reactor, reacted 2.5 hours, obtain the syrupy shape thick liquid; The sodium hydroxide solution that adds concentration 40%wt is transferred pH value to 10, obtains containing the reaction product of butyl glycoside
B6Be cooled to after 60 ± 5 ℃ and add sodium bisulfite 180 grams and concentration is formaldehyde solution 170 grams of 37%wt, open to stir and continue reaction end in 3 hours, promptly get the final reacting product that contains the sulfomethylation butyl glycoside
A6
Embodiment 7:
Weigh in the balance and get 100 gram exsiccant W-Gums, add 600 gram Pentyl alcohols (chemical pure), hydrochloric acid 32 grams of concentration 37%wt mix with stirrer, pour in the reactor that whipping appts is housed, reaction is after about 3 hours down at 140 ± 5 ℃, and the taking-up reaction product adds 100 gram dried corn starch again in reaction product, stir, pour in the reactor, reacted 3 hours, obtain the syrupy shape thick liquid; The sodium hydroxide solution that adds concentration 40%wt is transferred pH value to 11, obtains containing the reaction product of amyl group glucosides
B7, be cooled to after 80 ± 5 ℃ and add sodium bisulfite 170 grams and concentration is formaldehyde solution 87 grams of 37%wt, open to stir and continue reaction end in 4 hours, promptly get the final reacting product that contains sulphur methyl amyl glucosides
A7
Embodiment 8:
Weigh in the balance and get 100 gram exsiccant W-Gums, add 1500 gram n-hexyl alcohols (chemical pure), concentration 98%wt sulfuric acid 31 grams mix with stirrer, pour in the reactor that whipping appts is housed, reaction is after about 3 hours down at 150 ± 5 ℃, and the taking-up reaction product adds 100 gram dried corn starch again in reaction product, stir, pour in the reactor, reacted 3 hours, obtain the syrupy shape thick liquid; The sodium hydroxide solution that adds concentration 40%wt is transferred pH value to 11, obtains containing the reaction product of hexyl glycoside
B8Be cooled to after 90 ± 5 ℃ and add sodium bisulfite 180 grams and concentration is formaldehyde solution 140 grams of 37%wt, open to stir to continue to react and promptly got the final reacting product that contains sulphur methyl hexyl glycoside in 3 hours
A8
Embodiment 9:
Weigh in the balance and get 100 gram exsiccant W-Gums, add 4000 gram n-Heptyl alcohols (chemical pure), sulfuric acid 81 grams of concentration 98%wt mix with stirrer, pour in the reactor that whipping appts is housed, reaction is after about 4 hours down at 170 ± 5 ℃, and the taking-up reaction product adds 100 gram dried corn starch again in reaction product, stir, pour in the reactor, reacted 4 hours, obtain the syrupy shape thick liquid; The sodium hydroxide solution that adds concentration 40%wt is transferred pH value to 11, obtains containing the reaction product of heptyl glucosides
B9Be cooled to after 100 ± 5 ℃ and add sodium bisulfite 200 grams and concentration is formaldehyde solution 160 grams of 37%wt, open to stir and continue reaction end in 7 hours, promptly get the final reacting product that contains sulphur methylheptyl glucosides
A9
Two, effect experiment
Below used mud is existing mud in the prior art in the experiment, can be commercially available and get; Use by also contain in the reaction product that contains the low-carbon alkyl glucosides that obtains in the above-mentioned preparation experiment respond in remaining starch, alcohol, catalyzer etc. property of drilling fluid is not had negative impact; Use by also contain in the final reacting product that contains modification alkyl glycoside (alkyl glycoside of sulfoalkylization) that obtains in the above-mentioned preparation experiment respond in remaining starch, alcohol, catalyzer, aldehyde, sulfonated reagent, low-carbon alkyl glucosides etc. property of drilling fluid is not had negative impact.
Embodiment 10: contain the methylglycoside drilling fluid and contain sulphur methyl glucosides drilling fluid effect relatively
In 4%wt prehydration bentonite slurry, add respectively bentonite slurry volume 2% the preparation experiment gained contain methylglycoside
B1(embodiment 1), contain sulphur methyl glucosides
A1(embodiment 1), contain ethyl glucoside
B3(with embodiment 3), contain sulphur methylethyl glucosides
A3(embodiment 3), relatively they are to the rate of recovery and the rate of expansion of mud shale.The mud shale expansion experiment of the rate of recovery and rate of expansion evaluation procedure reference standard SY/T 6335-1997 mud shale physicochemical property test method.Experimental data sees Table 1 (establishing 16 hours rate of expansion of 4%wt prehydration bentonite slurry is 100%).
Table 1
| Drilling fluid composition | The rate of recovery (%) | Rate of expansion (%) |
| 4% prehydration bentonite slurry | 24 | 100 |
| 4% prehydration bentonite slurry+contain methylglycoside B1 | 35 | 84 |
| 4% prehydration bentonite slurry+contain sulphur methyl glucosides A1 | 48 | 80 |
| 4% prehydration bentonite slurry+contain ethyl glucoside B3 | 65 | 60 |
| 4% prehydration bentonite slurry+contain sulphur methylethyl glucosides A3 | 70 | 57 |
As seen the low-carbon alkyl glucosides of modification is littler to rate of recovery height, the rate of expansion of mud shale than unmodified low-carbon alkyl glucosides, and effect is better than unmodified low-carbon alkyl glucosides.
Embodiment 11: compare whipability
Reference standard SY/T 5350-91 drilling fluid whipping agent assessment process.Get the aqueous solution of the reaction product that contains alkyl glycoside of preparation experiment gained of the different concns percentage ratio of volume of water (add ingredients constitute) and the aqueous solution of final reacting product that contains sulphur methyl alkyl glucosides in tool plug graduated cylinder, pick up counting after the continuous oscillation 50 times, foam volume behind observation maximum foam amount and the 5min, measurement result such as table 2:
Table 2
| Concentration % | Time min | Contain sulphur methylethyl glucosides A3 | Contain ethyl glucoside B3 | Contain sulphur methyl butyl glucosides A6 | Contain butyl glycoside B6 | Contain sulphur methyl hexyl glycoside A8 | Contain hexyl glycoside B8 |
| 1.5 | 0 | 0 | 0.3 | 0.2 | 0.7 | 0.4 | 1.5 |
| 5 | 0 | 0 | 0 | 0.4 | 0.1 | 1.0 | |
| 1.0 | 0 | 0 | 0.4 | 0.2 | 1.0 | 0.3 | 1.2 |
| 5 | 0 | 0 | 0 | 0.5 | 0 | 0.7 | |
| 0.5 | 0 | 0 | 0.3 | 0.1 | 0.5 | 0.3 | 1.0 |
| 5 | 0 | 0 | 0 | 0.2 | 0 | 0.4 | |
| 0.3 | 0 | 0 | 0.1 | 0 | 0.3 | 0.1 | 1.0 |
| 5 | 0 | 0 | 0 | 0 | 0 | 0.4 | |
| 0.2 | 0 | 0 | 0 | 0 | 0.2 | 0 | 0.8 |
| 5 | 0 | 0 | 0 | 0 | 0 | 0.4 | |
| 0.1 | 0 | 0 | 0 | 0 | 0.1 | 0 | 0.4 |
| 5 | 0 | 0 | 0 | 0 | 0 | 0.2 |
As seen from the above table, modification alkyl glycoside whipability is very little, and the foam hold-time is also very short, is suitable for as additive for drilling fluid.
Embodiment 12: temperature resistance relatively
Getting 4%wt slope soil starches as base and estimates the ethyl glucoside that contains the preparation experiment gained
B3With contain sulphur methylethyl glucosides
A3To the modification of drilling fluid temperature resistance ability, wherein
B3Or
A3Add-on be 5% of basic volume of slurry.The results are shown in Table 3:
Table 3
| Apparent viscosity AV (mPa.s) | Plastic viscosity PV (mPa.s) | Moving shearing stress YP (Pa) | Filter loss FL (ml) | |
| The base slurry | 22 | 19 | 3 | 9 |
| Ethyl glucoside is starched+contained to base B3 | 20 | 18 | 2 | 7.5 |
| Sulphur methylethyl glucosides is starched+contained to base A3 | 20 | 19 | 1 | 6 |
| Ethyl glucoside is starched+contained to base B3(180 ℃ were rolled 16 hours down) | 32 | 29 | 3 | 17 |
| Sulphur methylethyl glucosides is starched+contained to base A3(180 ℃ were rolled 16 hours down) | 21 | 20 | 1 | 7 |
This shows and contain
A3Slope soil 180 ℃ rolled 16 hours down after performance change not quite with normal temperature, but contain
B3Performance obviously degenerate, illustrate on the ethyl glucoside molecule introduce the sulfoalkyl group after temperature resistance obviously strengthen.
Embodiment 13:
Choose the drilling fluid that contains modified additive of the present invention and improve the rate of recovery and rock core expansion experiment, if 16 hours rate of expansion of 4%wt prehydration bentonite slurry is 100%, the experiment of the mud shale expansion of rate of expansion evaluation procedure reference standard SY/T6335-1997 mud shale physicochemical property test method.Preparation experiment gained wherein
B3Or
A3Add-on be 5% of basic volume of slurry.Result such as table 4:
Table 4
| Mud is formed | The rate of recovery (%) | Rate of expansion (%) |
| 4% prehydration bentonite slurry | 24 | 100 |
| 4% prehydration bentonite slurry+contain ethyl glucoside B3 | 65 | 60 |
| 4% prehydration bentonite slurry+contain sulphur methylethyl glucosides A3 | 70 | 57 |
| 4% prehydration bentonite slurry+contain butyl glycoside B6 | 78 | 49 |
| 4% prehydration bentonite slurry+contain sulphur methyl butyl glucosides A6 | 82 | 46 |
| 4% prehydration bentonite slurry+contain hexyl glycoside B8 | 92 | 40 |
| 4% prehydration bentonite slurry+contain sulphur methyl hexyl glycoside A8 | 93 | 38 |
Last table explanation modification alkyl glycoside of the present invention is better than unmodified alkyl glycoside to the inhibition of mud shale.
Embodiment 14:
In the prehydration bentonite slurry of 8%wt, add respectively bentonite slurry volume 2% the preparation experiment gained contain ethyl glucoside
B3And contain the sulfomethylation ethyl glucoside
A3, according to SY/T 5241-91 water-base drilling fluid with the fluid loss agent assessment process dehydration evaluation experimental falls and standard SY/T 5243-91 water-base drilling fluid carries out the viscosity reduction evaluation experimental with the viscosity-depression agent assessment process, result such as table 5:
Table 5
| Mud is formed | Apparent viscosity AV (mPa.s) | Plastic viscosity PV (mPa.s) | Moving shearing stress YP (Pa) | Filter loss FL (ml) | PH |
| 8% bentonite slurry | 82 | 52 | 30 | 16.5 | 8.5 |
| 8% bentonite slurry+contain ethyl glucoside B3 | 22.5 | 16 | 6.5 | 14.5 | 8.5 |
| 8% bentonite slurry+contain sulphur methylethyl glucosides A3 | 20 | 15 | 6 | 12.5 | 8.5 |
As seen the modified additive viscosity reduction ability that contains sulphur methylethyl glucosides is better than ethyl glucoside.
Embodiment 15:
The ethyl glucoside that contains with the preparation experiment gained
B3, contain sulphur methylethyl glucosides
A3Be example, it joined respectively in the 4%wt prehydration bentonite slurry, carry out the reservoir protection evaluation experimental, result such as table 6 according to standard SY/T 6540-2002 damage of drilling fluid and completion fluid oil reservoir indoor evaluation method:
Table 6
| The mud situation | Ko 10 -3μm 2 | Kd 10 -3μm 2 | Penetration number recovery rate % |
| 4%wt prehydration bentonite slurry | 7.12 | 4.272 | 60 |
| 4%wt prehydration bentonite slurry+contain sulphur methylethyl glucosides A3 | 9.49 | 7.42 | 78 |
This shows, when the drilling fluid that contains the modification alkyl glycoside has superperformance, can keep good reservoir protection effect.
Embodiment 16: the consumption of modified additive is to the influence of drilling fluid modification
Contain sulphur methylethyl glucosides with the preparation experiment gained
A3Be example; it is joined in the base slurry (4%wt prehydration bentonite slurry+mud volume 0.3%KPAM) with different volumetric concentration (with respect to the percentage by volume of base slurry); carry out the reservoir protection evaluation experimental according to standard SY/T 6540-2002 damage of drilling fluid and completion fluid oil reservoir indoor evaluation method; the rate of recovery and rate of expansion evaluation procedure reference standard SY/T6335-1997 shale-control agent for drilling fluid evaluation method; the frictional coefficient evaluation procedure is with reference to SY/T 6094-94 lubricant for drilling fluids assessment process, and experimental result sees Table 7 (the mud shale expansion rate of base slurry is 16 hours an actual rate of expansion):
Table 7
| Drilling fluid composition | Density | PV | YP | FL | The rolling rate of recovery (%) | Frictional coefficient | Mud shale expansion rate (%) |
| The base slurry | 1.04 | 20 | 5 | 23 | 21.2 | 0.25 | 42 |
| Base slurry+2% contains the sulfomethylation ethyl glucoside A3 | 1.06 | 19 | 3.5 | 17 | 68.2 | 0.22 | 28 |
| Base slurry+5% contains the sulfomethylation ethyl glucoside A3 | 1.08 | 19 | 4 | 14 | 89.9 | 0.17 | 14 |
| Base slurry+15% contains the sulfomethylation ethyl glucoside A3 | 1.18 | 22 | 8 | 8 | 97 | 0.08 | 9 |
| Base slurry+35% contains the sulfomethylation ethyl glucoside A3 | 1.38 | 24 | 11 | 5 | 99 | 0.02 | 4 |
| Base slurry+50% contains the sulfomethylation ethyl glucoside A3 | 1.53 | 25 | 13 | 5 | 99 | 0.01 | 2 |
Because the sulfoalkyl alkyl glycoside that contains in the modified additive that the present invention relates to is water-soluble fine, and in drilling fluid, do not carry sticking, also different with dosage difference in drilling fluid to the performance impact of drilling fluid.Dosage is many more, and the drilling fluid inhibition is strong more, oilness is good more, help reservoir protection more.When dosage reaches 35% (percentage ratio of mud volume relatively) when above, can be used as the external phase of synthetic base drilling fluid, performance classes is similar to oil-base mud.But its cost is low and do not have a flash-point, safe in utilization, environmentally safe with respect to oil-base mud.In actual applications can be according to the complexcase and the amount that becomes original definite adding modification alkyl glycoside on stratum.
Claims (12)
1. one kind low whipability drilling fluid includes mud and a kind of modified additive that contains the modification alkyl glycoside, and wherein said modified additive accounts for 1～50% of mud volume; Described modified additive is the final reacting product that makes according to the method that may further comprise the steps:
A. the preparation of low-carbon alkyl glucosides: starch and low-carbon alcohol are reacted in the presence of catalyzer, obtain containing the reaction product of low-carbon alkyl glucosides;
B. the preparation of modification alkyl glycoside: the sulfonated reagent of 50～100%wt of starch gross weight that adding in the reaction product that step a obtains adds, with the aldehyde that is equivalent to starch gross weight 15～35%wt, behind ℃ following continuation sufficient reacting of (50～100) ± 5, the final reacting product that obtains is described modified additive, wherein contains the alkyl glycoside of modification;
To be selected from n be 1～7 C to low-carbon alcohol among the above-mentioned steps a
nH
2n+1At least a among the OH;
It is 1～3 C that above-mentioned steps b aldehyde is selected from m
mH
2mAt least a among the O.
2. drilling fluid according to claim 1, wherein said step a may further comprise the steps:
A1. starch and low-carbon alcohol are mixed with 1: 0.3～1: 20 weight ratio;
A2. the catalyzer that in above mixture, adds the total add-on 1～8%wt of low-carbon alcohol;
A3. with above-mentioned mixing raw material under temperature (80～170) ± 5 ℃, fully reaction in reactor;
A4. transfer pH value to alkalescence the reaction product of step a3, obtain containing the reaction product of low-carbon alkyl glucosides;
Catalyzer is selected from least a in mineral acid, organic acid, tosic acid pyridinium salt or 2,4, the 6-tri-methyl p-toluenesulfonate quinolinium among the above-mentioned steps a2.
3. drilling fluid according to claim 2, in the preparation of the low-carbon alkyl glucosides of wherein said step a1～a4, described starch feeds intake for substep, be about to a starch and total low-carbon alcohol through described step a1, a2, a3 after, again another part starch is mixed with the product that step a3 reaction obtains, under with the same condition of step a3, react; After the starch input finishes, pass through described step a4 again, obtain containing the reaction product of low-carbon alkyl glucosides; The amount of starch that described per step throws is 0.05～50%wt of starch total amount.
4. drilling fluid according to claim 2, wherein said low-carbon alcohol C
nH
2n+1N is 2～4 among the OH.
5. drilling fluid according to claim 2, the weight ratio of wherein said starch and the total add-on of low-carbon alcohol is 1: 1～1: 5.
6. drilling fluid according to claim 2, wherein the described catalyzer of step a2 is selected from least a in the following material: sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, C
2-8Sulfo group carboxylic acid, tosic acid, sulfo-succinic acid, Witco 1298 Soft Acid, dodecyl sulphate, alkyl naphthalene sulfonic acid, phenylformic acid, tosic acid pyridinium salt and 2,4,6-tri-methyl p-toluenesulfonate quinolinium.
7. drilling fluid according to claim 2, wherein pH value is 8～11 among the step a4.
8. drilling fluid according to claim 1, wherein sulfonated reagent is selected from sodium bisulfite, sodium sulphite or the Sodium Pyrosulfite one or more among the step b.
9. drilling fluid according to claim 1, the wherein described sulfonated reagent add-on of the step b 55～80%wt that is described starch total amount.
10. drilling fluid according to claim 1, the wherein described aldehyde add-on of the step b 15～30%wt that is described starch total amount.
11. drilling fluid according to claim 1, wherein said modified additive accounts for 1～20% of mud volume.
12. the preparation method according to each described drilling fluid of claim 1～11 may further comprise the steps:
A. the preparation of low-carbon alkyl glucosides: starch and low-carbon alcohol are reacted in the presence of catalyzer, obtain containing the reaction product of low-carbon alkyl glucosides;
B. the preparation of modification alkyl glycoside: the sulfonated reagent of 50～100%wt of starch gross weight that adding in the low-carbon alkyl glucosides that step a obtains adds, with the aldehyde that is equivalent to starch gross weight 15～35%wt, behind ℃ following continuation sufficient reacting of (50～100) ± 5, the final reacting product that obtains is described modified additive, wherein contains the alkyl glycoside of sulfoalkyl modification;
C. drilling fluid preparation: the final reacting product that will obtain by step b, promptly described modified additive mixes with the component that comprises mud with described consumption and obtains drilling fluid;
To be selected from n be 1～7 C to low-carbon alcohol among the above-mentioned steps a
nH
2n+1At least a among the OH;
Sulfonated reagent is selected from one or more in sodium bisulfite, sodium sulphite or the Sodium Pyrosulfite among the above-mentioned steps b; It is 1～3 C that aldehyde is selected from m
mH
2mAt least a among the O.
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| CN101538461B (en) * | 2009-04-30 | 2011-01-12 | 中国石油天然气股份有限公司 | Pressure reducing and injection increasing agent used for flooding well and preparation method thereof |
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| CN101717622B (en) * | 2009-11-30 | 2012-10-10 | 北京奥凯立科技发展股份有限公司 | Lubricating inhibitor for drilling fluid and preparation method thereof and drilling fluid containing lubricating inhibitor for drilling fluid |
| CN102786561A (en) * | 2012-08-02 | 2012-11-21 | 中国石油化工股份有限公司 | Method of preparing CAPG for drilling fluid |
| US20140186626A1 (en) * | 2012-09-19 | 2014-07-03 | Sinopec Research Institute Of Petroleum Engineering | Modified starch, preparation method and use of the same, and drilling fluid |
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| CN106590575A (en) * | 2015-10-20 | 2017-04-26 | 中国石油化工股份有限公司 | Temperature-resistant salt-resistant low-tension foaming agent composition as well as preparation method and application thereof |
| CN106046068B (en) * | 2016-06-17 | 2019-02-01 | 长江大学 | The preparation method of modified poly- polysaccharide lubricating collapse-resisting inhibitor |
| CN111997544B (en) * | 2020-10-22 | 2022-08-02 | 中国电建集团河南工程有限公司 | Sedimentary potted landscape ultra-deep layer heat storage geothermal well drilling construction method |
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