CN104830293A - Clay containing microfoam workover fluid, preparation method and application thereof - Google Patents

Clay containing microfoam workover fluid, preparation method and application thereof Download PDF

Info

Publication number
CN104830293A
CN104830293A CN201510198312.2A CN201510198312A CN104830293A CN 104830293 A CN104830293 A CN 104830293A CN 201510198312 A CN201510198312 A CN 201510198312A CN 104830293 A CN104830293 A CN 104830293A
Authority
CN
China
Prior art keywords
mass parts
workover fluid
mass
argillaceous
parts
Prior art date
Application number
CN201510198312.2A
Other languages
Chinese (zh)
Inventor
马喜平
周有祯
马启睿
王晓磊
Original Assignee
西南石油大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 西南石油大学 filed Critical 西南石油大学
Priority to CN201510198312.2A priority Critical patent/CN104830293A/en
Publication of CN104830293A publication Critical patent/CN104830293A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02Well-drilling compositions
    • C09K8/38Gaseous or foamed well-drilling compositions
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/42Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/426Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging

Abstract

The invention relates to a clay containing microfoam workover fluid, which comprises the following components: 303.2-317.4 parts by mass of pure water, 3-12.4 parts by mass of bentonite, 0.3-1.3 parts by mass of sodium carbonate, 0.6-2 parts by mass of xanthan gum, 0-2 parts by mass of sodium carboxymethylcellulose (medium viscosity), 0-1.2 parts by mass of hydroxyethyl cellulose, 0-2.53 parts by mass of thiourea, 0-0.32 part by mass of dodecyl dimethyl benzyl ammonium chloride, 1.82-5.58 parts by mass of dodecyl dimethyl betaine, and 1.82-5.58 parts by mass of cocamidopropyl hydroxy sulfobetaine. The making method includes: firstly adding bentonite into water to make a base slurry, adding thiourea, then adding xanthan gum, sodium carboxymethylcellulose (medium viscosity) and hydroxyethyl cellulose in order to prepare a mixed solution, then adding dodecyl dimethyl benzyl ammonium chloride into the mixed solution, finally adding cocamidopropyl hydroxy sulfobetaine and dodecyl dimethyl betaine, and performing high speed stirring, thus obtaining the clay containing microfoam workover fluid. The workover fluid provided by the invention has high liquid membrane strength and poor gas permeability, and compared with conventional foam workover fluids, has the advantages of low filtration loss, high foam strength, good stability, strong sand carrying capacity, low cost, and convenient construction, etc.

Description

A kind of argillaceous microbubble workover fluid and its production and use

Technical field

The present invention relates to oil-gas field development technical field, be specifically related to a kind of argillaceous microbubble workover fluid and its production and use.

Technical background

Current low pressure well is repaiied operation and is often adopted oil base workover fluid and foam workover fluid.Although oil base workover fluid density is low, oil layer protection is effective, and cost is high, and environmental pollution is serious.Usual foam workover fluid does not have enough stability to stop the leakage of liquid in down-hole, and its liquid film repair ability is weak when oil pipe moves, the very fast dehydration shrinkage of meeting in high temperature and high salinity water, temperature resistance ability.In order to reduce the injury that conventional workover fluid causes gas-bearing formation, development of new foam workover fluid is imperative.Microbubble has that density is low, foam stabilization, has again the effect of bridge blinding lost circulation prevention, so it can be applied to workover fluid by us.Microbubble workover fluid is by water or add tensio-active agent containing the fluid of solid phase particles and formed, when there is no sufficient air or injecting gas, internal fluid can produce a kind of microvesicle wrapped up by multilayer film, the Film strength of this microvesicle is high, gas permeability is poor, compared with usual foam workover fluid, there is the advantages such as filter loss is low, foamy body is high, good stability, prop-carrying capacity are strong, cost is low, easy construction, and microbubble workover fluid density is low, and (density is at 0.65 ~ 0.99g/cm 3between can adjust arbitrarily), tripping out in down-hole string process without leakage, do not pollute gas-bearing formation, the process playing lower tubular column is not needed frequently in pit shaft, to supplement workover fluid, this effectively solves the circulation problems when the operation of low pressure gas-bearing formation, for post-job gas-bearing formation production capacity is recovered to create good condition.For low pressure oil gas well, microbubble workover fluid system not only can reduce fluid column pressure, reduces pressure reduction, and microvesicle in circulation zone can size distribution extensive, and there is certain intensity and toughness, there is deformability simultaneously, with Self Matching leakage channel, thus reach the object of leakproof.

Summary of the invention

The object of the invention is to: a kind of argillaceous microbubble workover fluid and its production and use is provided, this workover fluid has that density is low, foam stabilization, lost circulation prevention effect, usual foam workover fluid poor stability can be solved, the problems such as when oil pipe moves, liquid film repair ability is weak, heat and salinity tolerance ability.

Technical scheme of the present invention is as follows:

A kind of argillaceous microbubble workover fluid, it is characterized in that comprising component: 303.2 ~ 317.4 mass parts pure water, 3 ~ 12.4 mass parts wilkinites, 0.3 ~ 1.3 mass parts sodium carbonate, 0.6 ~ 2 mass parts xanthan gum, 0 ~ 2 mass parts Xylo-Mucine (in sticky), 0 ~ 1.2 mass parts Natvosol, 0 ~ 2.53 mass parts thiocarbamide, 0 ~ 0.32 mass parts dodecyl benzyl dimethyl ammonium chloride, 1.82 ~ 5.58 mass parts Varion CDG-Ks, 1.82 ~ 5.58 mass parts Cocamidopropyl hydroxyl sulphonic acid betaines;

The mass ratio of described Varion CDG-K and Cocamidopropyl hydroxyl sulphonic acid betaine is 1 ~ 3:3 ~ 1.

3, prepare a method for above-mentioned argillaceous microbubble workover fluid, comprise the following steps:

(1) 3 ~ 12.4 parts of wilkinites are joined in 303.2 ~ 317.4 mass parts pure water with the speed of 0.2 ~ 0.5g/min, stir, add 0.3 ~ 1.3 mass parts sodium carbonate again, stirring and dissolving also stirs 20-30min with under drilling fluid homogenizer rotating speed 8000-10000rpm, place aging more than 24 hours, make base slurry;

(2) 0 ~ 2.53 mass parts thiocarbamide is added in base slurry prepared by step (1), after stirring, form mixing solutions.

(3) by 0.6 ~ 2 mass parts xanthan gum, 0 ~ 2 mass parts Xylo-Mucine (in sticky), 0 ~ 1.2 mass parts Natvosol joins in mixed solution prepared by step (2) with the speed of 0.2 ~ 0.5g/min successively, constantly be stirred to and dissolve completely, form mixing solutions;

(4) 0 ~ 0.32 mass parts dodecyl benzyl dimethyl ammonium chloride is joined in mixed solution prepared by step (3), be stirred to after mixing, form mixing solutions.

(5) by 1.82 ~ 5.58 mass parts Cocamidopropyl hydroxyl sulphonic acid betaines and 1.82 ~ 5.58 mass parts Varion CDG-Ks, join in mixed solution prepared by step (4), stir, obtain argillaceous foam workover fluid.

In described step (1), wilkinite is drilling fluid wilkinite, In Xiazijie Region, xinjiang.

In described step (2), thiocarbamide is analytical pure;

Xanthan gum in described step (3), Xylo-Mucine (in sticky), Natvosol are analytical pure;

In described step (4), dodecyl benzyl dimethyl ammonium chloride is analytical pure;

In described step (5), Cocamidopropyl hydroxyl sulphonic acid betaine, Varion CDG-K are technical pure;

The condition stirred in described step (5) is: rotating speed 8000-10000rpm, time 5-20min.

The application of above-mentioned argillaceous microbubble workover fluid in the workover treatment of low pressure gas reservoir.

A kind of argillaceous microbubble workover fluid, is composed of the following componentsly prepared from: pure water, wilkinite, xanthan gum, Xylo-Mucine, Natvosol, thiocarbamide, dodecyl benzyl dimethyl ammonium chloride, Varion CDG-K, Cocamidopropyl hydroxyl sulphonic acid betaine.Wherein the add-on of each component is by the percentage calculation accounting for pure water quality, wilkinite accounts for 1 ~ 4%, sodium carbonate accounts for 0.1 ~ 0.4%, xanthan gum accounts for 0.2 ~ 0.6%, and Xylo-Mucine accounts for 0 ~ 0.6%, and Natvosol accounts for 0 ~ 0.4%, thiocarbamide accounts for 0 ~ 0.8%, dodecyl benzyl dimethyl ammonium chloride accounts for 0 ~ 0.1%, and Varion CDG-K accounts for 0.18 ~ 0.6%, and Cocamidopropyl hydroxyl sulphonic acid betaine accounts for 0.18 ~ 0.6%.

The preparation method of this argillaceous microbubble workover fluid comprises the following steps:

(1) 3 ~ 12.4 parts of wilkinites are joined in 303.2 ~ 317.4 mass parts pure water with the speed of 0.2 ~ 0.5g/min, stir, add 0.3 ~ 1.3 mass parts sodium carbonate again, stirring and dissolving also stirs 20-30min with under drilling fluid homogenizer rotating speed 8000-10000rpm, place aging more than 24 hours, make base slurry;

(2) 0 ~ 2.53 mass parts thiocarbamide is added in base slurry prepared by step (1), after stirring, form mixing solutions.

(3) by 0.6 ~ 2 mass parts xanthan gum, 0 ~ 2 mass parts Xylo-Mucine (in sticky), 0 ~ 1.2 mass parts Natvosol joins in mixed solution prepared by step (2) with the speed of 0.2 ~ 0.5g/min successively, constantly be stirred to and dissolve completely, form mixing solutions;

(4) 0 ~ 0.32 mass parts dodecyl benzyl dimethyl ammonium chloride is joined in mixed solution prepared by step (3), be stirred to after mixing, form mixing solutions.

(5) by 1.82 ~ 5.58 mass parts Cocamidopropyl hydroxyl sulphonic acid betaines and 1.82 ~ 5.58 mass parts Varion CDG-Ks, join in mixed solution prepared by step (4), with rotating speed 8000-10000rpm, stir 5-20min, obtain argillaceous microbubble workover fluid.

Wherein the mass ratio of Varion CDG-K and Cocamidopropyl hydroxyl sulphonic acid betaine is 1 ~ 3:3 ~ 1.

Described raw material xanthan gum (XC) is analytical pure, and Tianjin recovery fine chemistry industry institute produces; Sulphur is urinated, sodium carbonate, Xylo-Mucine (in sticky CMC), and Natvosol (HEC) is analytical pure, and Chengdu Ke Long chemical reagent factory produces; Dodecyl benzyl dimethyl ammonium chloride (1227) is technical pure, and Hubei Xinjing New Material Co., Ltd. produces; Varion CDG-K and Cocamidopropyl hydroxyl sulphonic acid betaine are technical pure, and Chengdu HTC of section produces.

In above-mentioned composition, pure water makees solvent; Wilkinite, xanthan gum, carboxymethyl cellulose, Natvosol cook suds-stabilizing agent, thickening material, fluid loss agent; Thiocarbamide makees antioxidant; Dodecyl benzyl dimethyl ammonium chloride (1227) makees sterilant; Varion CDG-K (BS-12) and Cocamidopropyl hydroxyl sulphonic acid betaine (CHSB) do pore forming material.

Advantage compared with prior art of the present invention and beneficial effect as follows:

1. the present invention adds clay first in foam workover fluid, the Film strength of this workover fluid is high, gas permeability is poor, compared with usual foam workover fluid, there is the advantages such as filter loss is low, foamy body is high, good stability, prop-carrying capacity are strong, cost is low, easy construction.

2) workover fluid of the present invention can be mixed with different density, selects different densities, make it have generalization according to different gas well features.

3. this foam workover fluid performance reaches: density 0.60-0.95g/cm 3, viscosity≤100mPas; At least at 100 DEG C, steady time is at least more than 72h.

4. the inventive method, raw material sources are extensive, and cost is low, and configuration is convenient.

Specific implementation method

Embodiment 1

A kind of argillaceous microbubble workover fluid, this foam workover fluid is composed of the following components, and component is: pure water, wilkinite, sodium carbonate, xanthan gum, Xylo-Mucine (in sticky), Natvosol, Varion CDG-K and Cocamidopropyl hydroxyl sulphonic acid betaine.Wherein the dosage of each component is all by the percentage calculation accounting for pure water quality, wilkinite accounts for 1%, sodium carbonate accounts for 0.1%, xanthan gum accounts for 0.2%, Xylo-Mucine (in sticky) accounts for 0.3%, Natvosol accounts for 0.2%, and Varion CDG-K accounts for 0.6%, and Cocamidopropyl hydroxyl sulphonic acid betaine accounts for 0.6%;

Prepare the preparation method of above-mentioned argillaceous microbubble workover fluid, comprise the following steps:

(1) put into 303.2g pure water in a reservoir, 3.032g wilkinite is added in pure water with the speed of 0.2g/min, stirs, add 0.3032g sodium carbonate again, stirring and dissolving also stirs 30min with under drilling fluid homogenizer rotating speed 8000rpm, places aging 24 hours, forms base slurry;

(2) treat that step (1) base slurry is formed, 0.6064g xanthan gum, 0.9096g Xylo-Mucine (in sticky) and 0.6064g Natvosol added respectively successively during base starches with the speed of 0.2g/min, limit edged stirs, to dissolving completely, form mixing solutions;

(3) 1.819g Varion CDG-K and 1.819g Cocamidopropyl hydroxyl sulphonic acid betaine is added respectively in the mixing solutions prepared to step (2), then under rotating speed 10000rpm, stir 5min with drilling fluid homogenizer, argillaceous microbubble workover fluid can be obtained.

The performance of workover fluid: for low pressure gas reservoir, the density of workover fluid is the key factor affecting its performance, and the height of density directly affects the size of filter loss, final decision well workover success, still using the maximum density of factor of influence as Performance evaluation criterion.After workover fluid preparation prepared by the present embodiment, density is: 0.856g/cm 3, apparent viscosity is: 82.0mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1.83Pa/mPs, and after through roller heating stove, at 100 DEG C, heat rolls 72 hours, density becomes: 0.751g/cm 3, apparent viscosity is: 72.5mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 3.26Pa/mPs rate of change of the density is :-9.13%.Show this workover fluid at 100 DEG C steady time >=72 hours, foamy body is high, good stability, can complete workover treatment.

Embodiment 2

A kind of argillaceous microbubble workover fluid, this foam workover fluid is composed of the following components, and component is: pure water, wilkinite, sodium carbonate, xanthan gum, Xylo-Mucine (in sticky), Natvosol, Varion CDG-K and Cocamidopropyl hydroxyl sulphonic acid betaine.Wherein the dosage of each component is all by the percentage calculation accounting for pure water quality, wilkinite accounts for 4%, sodium carbonate accounts for 0.16%, xanthan gum accounts for 0.6%, Xylo-Mucine (in sticky) accounts for 0.2%, Natvosol accounts for 0.4%, and Varion CDG-K accounts for 0.6%, and Cocamidopropyl hydroxyl sulphonic acid betaine accounts for 1.8%;

Prepare the preparation method of above-mentioned argillaceous microbubble workover fluid, comprise the following steps:

(1) put into 310g pure water in a reservoir, 12.4g wilkinite is added in pure water with the speed of 0.3g/min, stirs, add 0.496g sodium carbonate again, stirring and dissolving also stirs 30min with under drilling fluid homogenizer rotating speed 9000rpm, places aging 24 hours, forms base slurry;

(2) treat that step (1) base slurry is formed, 1.86g xanthan gum, 0.62g Xylo-Mucine (in sticky) and 1.24g Natvosol added respectively successively during base starches with the speed of 0.2g/min, limit edged stirs, and to dissolving completely, forms mixing solutions;

(3) 1.86g Varion CDG-K and 5.58g Cocamidopropyl hydroxyl sulphonic acid betaine is added respectively in the mixing solutions prepared to step (2), then under rotating speed 9000rpm, stir 10min with drilling fluid homogenizer, argillaceous microbubble workover fluid can be obtained.

The performance of workover fluid: after preparation, density is: 0.813g/cm 3, apparent viscosity is: 85.0mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1.5Pa/mPs, and after through roller heating stove, at 110 DEG C, heat rolls 72 hours, density becomes: 0.776g/cm 3, apparent viscosity is: 79mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1.93Pa/mPs rate of change of the density is :-4.55%.Show this workover fluid at 110 DEG C steady time >=72 hours, foamy body is high, good stability, can complete workover treatment.

Embodiment 3

A kind of argillaceous microbubble workover fluid, this foam workover fluid is composed of the following components, component is: pure water, wilkinite, sodium carbonate, xanthan gum, Xylo-Mucine (in sticky), Natvosol, thiocarbamide, Varion CDG-K and Cocamidopropyl hydroxyl sulphonic acid betaine.Wherein the dosage of each component is all by the percentage calculation accounting for pure water quality, wilkinite accounts for 4%, sodium carbonate accounts for 0.3%, xanthan gum accounts for 0.3%, Xylo-Mucine (in sticky) accounts for 0.6%, and Natvosol accounts for 0.1%, and thiocarbamide accounts for 0.4%, Varion CDG-K accounts for 1.8%, and Cocamidopropyl hydroxyl sulphonic acid betaine accounts for 0.6%;

Prepare the preparation method of above-mentioned argillaceous microbubble workover fluid, comprise the following steps:

(1) put into 307.4g pure water in a reservoir, 12.3g wilkinite is added in pure water with the speed of 0.4g/min, stirs, add 0.922g sodium carbonate again, stirring and dissolving also stirs 20min with under drilling fluid homogenizer rotating speed 10000rpm, places aging 24 hours, forms base slurry;

(2) treat that step (1) base slurry is formed, 1.23g thiocarbamide is added in base slurry prepared by step (1), after stirring, form mixing solutions.

(3) with the speed of 0.2g/min, 0.922g xanthan gum, 1.844g Xylo-Mucine (in sticky) and 0.3074g Natvosol are added in (2) respectively successively, limit edged stirs, to dissolving completely, form mixing solutions;

(4) 5.533g Varion CDG-K and 1.844g Cocamidopropyl hydroxyl sulphonic acid betaine is added respectively in the mixing solutions prepared to step (3), then under rotating speed 9000rpm, stir 20min with drilling fluid homogenizer, argillaceous microbubble workover fluid can be obtained.

The performance of workover fluid: after preparation, density is: 0.793g/cm 3, apparent viscosity is: 84.0mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1.56Pa/mPs, and after through roller heating stove, at 110 DEG C, heat rolls 78 hours, density becomes: 0.773g/cm 3, apparent viscosity is: 80mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1.58Pa/mPs rate of change of the density is :-2.52%.Show this workover fluid at 110 DEG C steady time >=78 hours, foamy body is high, good stability, can complete workover treatment.

Embodiment 4

A kind of argillaceous microbubble workover fluid, this foam workover fluid is composed of the following components, component is: pure water, wilkinite, sodium carbonate, xanthan gum, Xylo-Mucine (in sticky), Natvosol, thiocarbamide, Varion CDG-K and Cocamidopropyl hydroxyl sulphonic acid betaine.Wherein the dosage of each component is all by the percentage calculation accounting for pure water quality, wilkinite accounts for 3%, sodium carbonate accounts for 0.4%, xanthan gum accounts for 0.4%, Xylo-Mucine (in sticky) accounts for 0.4%, and Natvosol accounts for 0.3%, and thiocarbamide accounts for 0.8%, Varion CDG-K accounts for 0.6%, and Cocamidopropyl hydroxyl sulphonic acid betaine accounts for 1.2%;

Prepare the preparation method of above-mentioned argillaceous microbubble workover fluid, comprise the following steps:

(1) put into 315.7g pure water in a reservoir, 9.471g wilkinite is added in pure water with the speed of 0.5g/min, stirs, add 1.263g sodium carbonate again, stirring and dissolving also stirs 25min with under drilling fluid homogenizer rotating speed 10000rpm, places aging 24 hours, forms base slurry;

(2) treat that step (1) base slurry is formed, 2.526g thiocarbamide is added in base slurry prepared by step (1), after stirring, form mixing solutions.

(3) with the speed of 0.2g/min, 1.263g xanthan gum, 1.263g Xylo-Mucine (in sticky) and 0.9471g Natvosol are added in (2) respectively successively, limit edged stirs, to dissolving completely, form mixing solutions;

(4) 1.894g Varion CDG-K and 3.788g Cocamidopropyl hydroxyl sulphonic acid betaine is added respectively in the mixing solutions prepared to step (3), then under rotating speed 10000rpm, stir 20min with drilling fluid homogenizer, argillaceous microbubble workover fluid can be obtained.

The performance of workover fluid: after preparation, density is: 0.878g/cm 3, apparent viscosity is: 86.5mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1.28Pa/mPs, and after through roller heating stove, at 120 DEG C, heat rolls 80 hours, density becomes: 0.856g/cm 3, apparent viscosity is: 80.5mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1.60Pa/mPs rate of change of the density is :-2.50%.Show this workover fluid at 120 DEG C steady time >=80 hours, foamy body is high, good stability, can complete workover treatment.

Embodiment 5

A kind of argillaceous microbubble workover fluid, this foam workover fluid is composed of the following components, and component is: pure water, wilkinite, sodium carbonate, xanthan gum, thiocarbamide, dodecyl benzyl dimethyl ammonium chloride, Varion CDG-K and Cocamidopropyl hydroxyl sulphonic acid betaine.Wherein the dosage of each component is all by the percentage calculation accounting for pure water quality, wilkinite accounts for 2%, sodium carbonate accounts for 0.2%, xanthan gum accounts for 0.5%, thiocarbamide accounts for 0.8%, dodecyl benzyl dimethyl ammonium chloride accounts for 0.1%, and Varion CDG-K accounts for 1.2%, and Cocamidopropyl hydroxyl sulphonic acid betaine accounts for 0.6%;

Prepare the preparation method of above-mentioned argillaceous microbubble workover fluid, comprise the following steps:

(1) put into 317.4g pure water in a reservoir, 6.348g wilkinite is added in pure water with the speed of 0.5g/min, stirs, add 0.6348g sodium carbonate again, stirring and dissolving also stirs 25min with under drilling fluid homogenizer rotating speed 9000rpm, places aging 24 hours, forms base slurry;

(2) treat that step (1) base slurry is formed, 0.9522g thiocarbamide is added in base slurry prepared by step (1), after stirring, form mixing solutions.

(3) add in (2) with the speed of 0.2g/min by 1.587g xanthan gum, limit edged stirs, and to dissolving completely, forms mixing solutions;

(4) 0.3174g dodecyl benzyl dimethyl ammonium chloride is joined in mixed solution prepared by step (3), be stirred to after mixing, form mixing solutions.

(5) 3.809g Varion CDG-K and 1.904g Cocamidopropyl hydroxyl sulphonic acid betaine is added respectively in the mixing solutions prepared to step (4), then under rotating speed 10000rpm, stir 25min with drilling fluid homogenizer, argillaceous microbubble workover fluid can be obtained.

The performance of workover fluid: after preparation, density is: 0.762g/cm 3, apparent viscosity is: 100mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1Pa/mPs, and after through roller heating stove, at 130 DEG C, heat rolls 80 hours, density becomes: 0.757g/cm 3, apparent viscosity is: 75mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1.143Pa/mPs rate of change of the density is :-0.67%.Show this workover fluid at 130 DEG C steady time >=80 hours, foamy body is high, good stability, can complete workover treatment.

Embodiment 6

A kind of argillaceous microbubble workover fluid, this foam workover fluid is composed of the following components, component is: pure water, wilkinite, sodium carbonate, xanthan gum, Xylo-Mucine (in sticky), Natvosol, thiocarbamide, dodecyl benzyl dimethyl ammonium chloride, Varion CDG-K and Cocamidopropyl hydroxyl sulphonic acid betaine.Wherein the dosage of each component is all by the percentage calculation accounting for pure water quality, wilkinite accounts for 3%, sodium carbonate accounts for 0.3%, xanthan gum accounts for 0.3%, and Xylo-Mucine (in sticky) accounts for 0.3%, and Natvosol accounts for 0.3%, thiocarbamide accounts for 0.4%, dodecyl benzyl dimethyl ammonium chloride accounts for 0.05%, and Varion CDG-K accounts for 1.2%, and Cocamidopropyl hydroxyl sulphonic acid betaine accounts for 1.2%;

Prepare the preparation method of above-mentioned argillaceous microbubble workover fluid, comprise the following steps:

(1) put into 310g pure water in a reservoir, 9.3g wilkinite is added in pure water with the speed of 0.5g/min, stirs, add 0.93g sodium carbonate again, stirring and dissolving also stirs 30min with under drilling fluid homogenizer rotating speed 10000rpm, places aging 24 hours, forms base slurry;

(2) treat that step (1) base slurry is formed, 1.24g thiocarbamide is added in base slurry prepared by step (1), after stirring, form mixing solutions.

(3) add in (2) with the speed of 0.2g/min respectively successively by 0.93g xanthan gum, 0.93g Xylo-Mucine (in sticky) and 0.93g Natvosol, limit edged stirs, to dissolving completely, and formation mixing solutions;

(4) 0.155g dodecyl benzyl dimethyl ammonium chloride is joined in mixed solution prepared by step (3), be stirred to after mixing, form mixing solutions.

(5) 3.72g Varion CDG-K and 3.72g Cocamidopropyl hydroxyl sulphonic acid betaine is added respectively in the mixing solutions prepared to step (4), then under rotating speed 10000rpm, stir 20min with drilling fluid homogenizer, argillaceous microbubble workover fluid can be obtained.

The performance of workover fluid: after preparation, density is: 0.763g/cm 3, apparent viscosity is: 82.5mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1.68Pa/mPs, and after through roller heating stove, at 130 DEG C, heat rolls 80 hours, density becomes: 0.73g/cm 3, apparent viscosity is: 76.5mPas, and ratio of dynamic shear force/yield value to plastic viscosity is: 1.60Pa/mPs rate of change of the density is :-4.33%.Show this workover fluid at 130 DEG C steady time >=80 hours, foamy body is high, good stability, can complete workover treatment.

Above-mentioned lift experiment is only preferably example of the present invention, the protection domain be not intended to limit the present invention.All any amendments, improvement etc. done within principle of the present invention, all should be included within protection scope of the present invention.

Claims (10)

1. an argillaceous microbubble workover fluid, it is characterized in that comprising component: 303.2 ~ 317.4 mass parts pure water, 3 ~ 12.4 mass parts wilkinites, 0.3 ~ 1.3 mass parts sodium carbonate, 0.6 ~ 2 mass parts xanthan gum, 0 ~ 2 mass parts Xylo-Mucine (in sticky), 0 ~ 1.2 mass parts Natvosol, 0 ~ 2.53 mass parts thiocarbamide, 0 ~ 0.32 mass parts dodecyl benzyl dimethyl ammonium chloride, 1.82 ~ 5.58 mass parts Varion CDG-Ks, 1.82 ~ 5.58 mass parts Cocamidopropyl hydroxyl sulphonic acid betaines.
2. a kind of argillaceous microbubble workover fluid according to claim 1, is characterized in that: the mass ratio of described Varion CDG-K and Cocamidopropyl hydroxyl sulphonic acid betaine is 1 ~ 3:3 ~ 1.
3. prepare a method for argillaceous microbubble workover fluid described in claim 1 or 2, it is characterized in that comprising the following steps:
(1) wilkinite is joined in 303.2 ~ 317.4 mass parts pure water with the speed of 0.2 ~ 0.5g/min, stir, then stir 20-30min with under drilling fluid homogenizer rotating speed 8000-10000rpm, place aging more than 24 hours, make base slurry;
(2) 0 ~ 2.53 mass parts thiocarbamide is added in base slurry prepared by step (1), after stirring, form mixing solutions.
(3) by 0.6 ~ 2 mass parts xanthan gum, 0 ~ 2 mass parts Xylo-Mucine (in sticky), 0 ~ 1.2 mass parts Natvosol joins in mixed solution prepared by step (2) with the speed of 0.2 ~ 0.5g/min successively, constantly be stirred to and dissolve completely, form mixing solutions;
(4) 0 ~ 0.32 mass parts dodecyl benzyl dimethyl ammonium chloride is joined in mixed solution prepared by step (3), be stirred to after mixing, form mixing solutions.
(5) by 1.82 ~ 5.58 mass parts Cocamidopropyl hydroxyl sulphonic acid betaines and 1.82 ~ 5.58 mass parts Varion CDG-Ks, join in mixed solution prepared by step (4), stir, obtain argillaceous foam workover fluid.
4. the preparation method of a kind of Solid Free foam workover fluid according to claim 3, is characterized in that: in described step (1), wilkinite is drilling fluid wilkinite, In Xiazijie Region, xinjiang.
5. the preparation method of a kind of argillaceous foam workover fluid according to claim 3, is characterized in that: in described step (2), thiocarbamide is analytical pure.
6. the preparation method of a kind of argillaceous foam workover fluid according to claim 3, is characterized in that: xanthan gum in described step (3), Xylo-Mucine (in sticky), Natvosol are analytical pure.
7. the preparation method of a kind of argillaceous foam workover fluid according to claim 3, is characterized in that: in described step (4), dodecyl benzyl dimethyl ammonium chloride is analytical pure.
8. the preparation method of a kind of argillaceous foam workover fluid according to claim 3, is characterized in that: in described step (5), Cocamidopropyl hydroxyl sulphonic acid betaine, Varion CDG-K are technical pure.
9. a kind of preparation method of argillaceous foam workover fluid according to any one of claim 3-8, is characterized in that: the condition stirred in described step (5) is: rotating speed 8000-10000rpm, time 5-20min.
10. the application of a kind of argillaceous foam workover fluid in the workover treatment of low pressure gas reservoir described in claim 1 or 2.
CN201510198312.2A 2015-04-24 2015-04-24 Clay containing microfoam workover fluid, preparation method and application thereof CN104830293A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510198312.2A CN104830293A (en) 2015-04-24 2015-04-24 Clay containing microfoam workover fluid, preparation method and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510198312.2A CN104830293A (en) 2015-04-24 2015-04-24 Clay containing microfoam workover fluid, preparation method and application thereof

Publications (1)

Publication Number Publication Date
CN104830293A true CN104830293A (en) 2015-08-12

Family

ID=53808500

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510198312.2A CN104830293A (en) 2015-04-24 2015-04-24 Clay containing microfoam workover fluid, preparation method and application thereof

Country Status (1)

Country Link
CN (1) CN104830293A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107987812A (en) * 2017-11-16 2018-05-04 严希海 A kind of workover fluid and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101643641A (en) * 2009-06-18 2010-02-10 东营泰尔石油技术有限公司 Low solid phase and micro-foam drilling fluid or completion fluid capable of being used circularly
CN101798499B (en) * 2010-03-30 2012-09-05 中国石油集团川庆钻探工程有限公司工程技术研究院 Strong inhibition type anti-collapse foam liquid for drilling
EP1663908B1 (en) * 2003-03-12 2013-10-23 Halliburton Energy Services, Inc. Foamed compositions and methods of use in subterranean zones
CN103965844A (en) * 2013-01-30 2014-08-06 中国石油天然气股份有限公司 Low-density microbubble workover fluid
CN104531108A (en) * 2014-12-09 2015-04-22 西南石油大学 Solid phase-free foam workover fluid, preparation method and uses thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1663908B1 (en) * 2003-03-12 2013-10-23 Halliburton Energy Services, Inc. Foamed compositions and methods of use in subterranean zones
CN101643641A (en) * 2009-06-18 2010-02-10 东营泰尔石油技术有限公司 Low solid phase and micro-foam drilling fluid or completion fluid capable of being used circularly
CN101798499B (en) * 2010-03-30 2012-09-05 中国石油集团川庆钻探工程有限公司工程技术研究院 Strong inhibition type anti-collapse foam liquid for drilling
CN103965844A (en) * 2013-01-30 2014-08-06 中国石油天然气股份有限公司 Low-density microbubble workover fluid
CN104531108A (en) * 2014-12-09 2015-04-22 西南石油大学 Solid phase-free foam workover fluid, preparation method and uses thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107987812A (en) * 2017-11-16 2018-05-04 严希海 A kind of workover fluid and preparation method thereof

Similar Documents

Publication Publication Date Title
CN101311243A (en) Temporary blocking agent for hydrocarbon reservoir crack
CN1329473C (en) Low-molecular environmentally-friendly fracturing fluid and use of recovery liquid thereof
CN101775273A (en) High-temperature resistance base fluid for well cementing of oil gas well, preparation method and application thereof
CN102329599B (en) Novel selective water shutoff agent for oil well water shutoff
AU2011340304B2 (en) Wellbore servicing compositions comprising a fluid loss agent and methods of making and using same
CN100571855C (en) Foaming agent and circulated microvesicle drilling fluids and drilling technique
CN103980873B (en) A kind of three-phase froth composite oil-displacing system and application thereof
CN101613595A (en) Micro-foam drilling fluid
CN101126018B (en) Low-temperature hardening scurry-proof cement slurry for well cementing
CN102807849B (en) Gel plugging agent for deep profile control of higher temperature oil reservoir and preparation method of gel plugging agent
CN102191027B (en) High-temperature-resistant dispersed fluid loss agent for oil well cement and preparation method thereof
CN1888374A (en) High-temperature and High-Salt resisting gel water packing-off method
CN102603966B (en) Cross-linked polymer microsphere for oil displacement of oilfield and preparation method for cross-linked polymer microsphere
CN100569895C (en) Foaming agent for improving conventional oil reservoir raw oil recovery rate and its preparing method
CN104194750B (en) It is a kind of for nanometer sealing agent of oil base drilling fluid and preparation method thereof
CN102757778B (en) Fracturing fluid capable of resisting high salinity water quality
CN102604606B (en) Chemical secondary-crosslinking jelly foam water plugging and profile controlling liquid
CN102732234B (en) Salt-resistant temperature-resistant micro-foam water-based drilling fluid
CA2858027A1 (en) Well treatment with high solids content fluids
CN103074049B (en) Fracturing fluid prepared by recovery waste water of crude oil and preparation method of fracturing fluid
CN1288036A (en) High temp. temporary plugging agent and its prepn. method
CN101597488B (en) Treating fluid for high solid phase drilling fluid filter cake removal
CN103232839B (en) Water shutoff agent applicable to high-temperature high-salt oil reservoir water shutoff profile control
CN102888213B (en) Clay-content-free drilling fluid
CN104099071A (en) Horizontal well-cementation expandable cement mortar and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
EXSB Decision made by sipo to initiate substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20150812

WD01 Invention patent application deemed withdrawn after publication