CN104694093A - High-temperature fluid slug glue solution used for sealing oil and gas, and application thereof - Google Patents
High-temperature fluid slug glue solution used for sealing oil and gas, and application thereof Download PDFInfo
- Publication number
- CN104694093A CN104694093A CN201310655084.8A CN201310655084A CN104694093A CN 104694093 A CN104694093 A CN 104694093A CN 201310655084 A CN201310655084 A CN 201310655084A CN 104694093 A CN104694093 A CN 104694093A
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- Prior art keywords
- glue
- slug
- high temperature
- temperature fluid
- well
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Classifications
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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
- C09K8/40—Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
-
- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention relates to a high-temperature fluid slug glue solution capable of sealing oil and gas and application thereof. The glue solution is applied to drilled wells in oil and gas fields. The glue solution comprises the following components by mass: 0.1% to 0.3% of a main agent, 0.05% to 0.3% of a two-stage cross-linking agent, 0.10% to 0.40% of a pH regulator and 0.01% to 0.2% of a deoxidant, with the balance being water. According to the invention, the glue solution is stirred for 30 minutes on the ground so as to obtain an initially-gelled glue with viscosity of more than 2000 mpa.s; the glue solution of the weak glue can clean oil dirt on the inner wall of a sleeve pipe; the glue solution is injected into a well for 150 to 300 minutes so as to obtain a secondarily-gelled glue and form an adhesion sleeve pipe and a high-temperature fluid slug with high viscosity (above 10000 mpa.s) and strong anti-fluid-channeling ability; the slug can effectively prevent channeling of high-pressure oil and gas in strata, ensures safe operation at the upper part of the slug, isolates heavy slurry on the upper part of the slug, and prevents the heavy slurry from contacting and polluting a reservoir bed; meanwhile, the slug can resist a temperature of 150 DEG C, has good effects on the high-temperature leaky strata, and has low cost.
Description
Technical field:
The present invention relates to oilfield drilling and borehole operation field, being specially adapted to high temperature, high steam oil ratio (SOR), gushing the complicated oil well leaked with depositing, alternative down hole sleeve valve.
Background technology:
South fort buried hill fissure sexual development, gas oil ratio are high, and under conventional drilling technologies condition, drain spray is with depositing, and complex accident is many, and geological target is difficult to realize, and well control risk is severe, and drilling cost is higher.After implementing under-balanced drilling technology, effectively reduce buried hill drilling fluid leakage, decrease reservoir pollution, reduce complex accident rate, show unrivaled advantage, for guaranteeing to terminate whole process down-hole be all in under-balanced state from opening oil reservoir to completion, further reduction leakage, realize whole process reservoir protection, usually making a trip, adopt during well-completion practice and no killing well device is installed, the modes such as casing valve, but all there is shortcoming in various degree in the two: non-snubbing service device needs plenty of time erecting equipment, also the plenty of time is needed to realize pulling out of hole and tripping operation in use procedure.Down hole sleeve valve is mainly by import, and cost is higher, and drilling process also can because of reasons such as hole deviations, and drilling tool causes Controlling System malfunctioning to its infringement.Current domestic existing Duo Jia oil field adopts fluid slug technology to intercept on hydrocarbon stratum and alters; this technology can guarantee the safe operation of slug top; form more stable pressure system in slug bottom simultaneously; reduce or avoid leakage, the generation of overflow complexity; in reduction operating risk, improve reservoir protection effect fermentation, achieve good effect; but this fluid slug application of temperature, mostly at about 90 DEG C, cannot meet the needs of the 150 DEG C of high-temperature oil reservoir in buried hill, fort, the southeast, Ji.
The present invention is directed to buried hill well fracture development, gas oil ratio is high, and the narrow and temperature high of ' Safe Density Windows, have developed anti-more than 150 DEG C high temperature fluid slugs, and have studied its application art.
Summary of the invention:
The object of this invention is to provide a kind of high temperature fluid slug glue resisting 150 DEG C, distance piece is portion's drilling fluid or well control fluid beyond the Great Wall, avoiding it to contact with reservoir causes liquid phase, solid phase to pollute, intercept on the reservoir hydrocarbons of bottom simultaneously and alter, for slug top well section make a trip, completion construction provides safe wellbore environment, reduces operation well control risk.
Another object of the present invention is to provide described high temperature fluid slug glue blending process
Another object of the present invention is to provide described high temperature fluid slug glue application art
One, the technical solution used in the present invention is:
High temperature fluid slug glue is made up of host, twin-stage linking agent, oxygen scavenger, acid-base modifier, water, and each component comprises:
1, host: modified methyl sulfonate;
2, twin-stage linking agent: organic boron class, triallyl isocyanurate, the compositions such as dizinc acrylate resin are composite;
3, acid-base modifier: dinitrobenzoic acid;
4, oxygen scavenger: S-WAT;
5, water.
High temperature fluid slug glue, each constituent mass per-cent is:
1, host: modified methyl sulfonate, mass percent 0.1%-0.3%;
2, twin-stage linking agent: organic boron class, triallyl isocyanurate, the compositions such as dizinc acrylate resin are composite, mass percent 0.05%-0.3%;
3, acid-base modifier: dinitrobenzoic acid, mass percent 0.10%-0.40%;
4, oxygen scavenger: S-WAT, mass percent is 0.01%-0.2%.
All the other are water
In addition, clean-out system is spearhead, before injection high temperature fluid slug glue, injects scavenging solution cannula cleaning inner wall mud and pollutes, for high temperature fluid slug provides good wellbore environment.
Efficient rapid viscosity breaker main component is persulfuric acid amine, when the broken glue of needs, and the liquid that high temperature fluid slug can be made after injecting this medicine fast to break glue become rarer.Also bit cutting can be adopted to break glue, high temperature fluid slug is broken glue and becomes fritter colloid, discharge pit shaft with drilling fluid.
Two, high temperature fluid slug preparation technology:
1, Preparation equipment: with Agitation Tank, the surface pipeline that is connected with water source, pit shaft of agitator.
2, preparation method: according to enforcing location borehole size, to inject length range for aequum in 200-300m calculating high temperature fluid slug well, and adds residual quantity in tank.Pipeline between joint connection in site Agitation Tank and water source, pumps into well site water.Open agitator, adopt artificial dosing method to add host, twin-stage linking agent, oxygen scavenger, acid-base modifier successively by component design, stir 30-60 minute, to glue evenly.
Three, high temperature fluid slug site construction technology:
1, play drilling tool paramount temperature fluid slug to estimate to implement, bottom well section, to complete the preparation of high temperature fluid slug glue simultaneously.
2, connection line between cementing truck, drilling tool, sets up clean-out system flow passage, and carries out pressure testing.After pressure testing is qualified, in cementing truck tank, configure scavenging solution, wherein clean-out system volume percent is 6%-10%, and all the other are water, and to be cleaned dose even with water mixture, and namely inject in pit shaft by pipeline, cannula cleaning inner wall mud is polluted.
3, connect pipeline between high temperature fluid slug glue Agitation Tank, cementing truck, set up high temperature fluid slug glue flow passage, and carry out pressure testing.After pressure testing is qualified, glue in Agitation Tank is evacuated to cementing truck, and then pump is in pit shaft, base area stressor layer situation selects the drilling fluid of proper density or well control fluid to replace glue, the amount of the pumping into palpus accurate calculation of drilling fluid or well control fluid, guarantee that glue replaces to design attitude, and drilling tool domestic demand leaves the glue of about 300 meters, is mixed in glue to prevent drilling fluid or well control fluid.
4, rise and be drilled into slug top, small displacement wash cycles drilling tool, rear static wait; under high temperature, between glue, each medicine interacts, about 150-300 minute plastic, and temperature is higher; plastic is faster; gel strength is larger, and the high temperature fluid slug viscosity of formation is higher, and sleeve pipe adhesive attraction is stronger; anti-gas channeling ability is stronger; thus form good barrier at top drilling fluid or between well control fluid and bottom reservoir, reach protection reservoir, reduce the object of operation well control risk simultaneously.
5, to make a trip or after well-completion practice completes, namely sectional injects efficient rapid viscosity breaker and carries out brokenly glue.Gel breaker and high temperature fluid slug volume percent are 1:50, and be 1:50 with the volume ratio of water, about 2h breaks the liquid that glue becomes viscosity lower.
High temperature fluid slug plastic process and performance as follows:
1, ground stirs 30 minutes, and namely glue carries out first time plastic, and viscosity is about 2000mpa.s.Glue now can play the effect that plug swept by thick slurry, removes borehole wall mud contamination further.
2, pump in pit shaft process, temperature influence, the instantaneous reduction of gelatin viscosity, about 1000mpa.s, reduce the high difficulty of infusion pressure.
3, after injecting into well, after at high temperature static about 180 minutes, glue carries out secondary plastic rapidly, and viscosity rises to 10000mpa.s rapidly, and along with the growth viscosity of time constantly increases, colloid is attached to internal surface of sleeve pipe securely.
4, high temperature fluid slug can keep stable performance by 90h under 150 DEG C of well temperature, and during this period, colloid viscosity constantly rises, colloid natural degradation gradually after 90h.
Concrete embodiment:
Below in conjunction with embodiment, the invention will be further described.
Embodiment in August, 1 2012, high temperature fluid slug is in the XX well application of fort, NW Hebei south.
Fort, south XX well four is opened and is implemented under-balanced drilling technique, and in under-balanced drilling construction process, well kick, leakage are comparatively serious, and tripping operation faces severe well control risk.It is 151.4 DEG C that high temperature fluid slug implements well section the highest well temperature, and hole deviation is 41.6 °-55.6 °, and after application high temperature fluid slug technology, leakage, well kick problem obtain effective control, ensure that this well makes a trip the smooth enforcement of construction preferably.
Process for preparation:
Prepare the Agitation Tank with agitator, each constituent mass per-cent is:
Host, consumption 0.3%, twin-stage linking agent, consumption 0.25%, acid-base modifier, consumption 0.35%, oxygen scavenger, consumption 0.15%, all the other are on-the-spot water.
Site operation process: connect surface pipeline, and pressure testing is qualified.
1, rise and be drilled into 7in and hang tail pipe footwear above 150m, in cementing truck tank, configure scavenging solution, the volume percent of clean-out system is 7%, all the other are water, clean-out system is injected in pit shaft, cleaning drilling rod and internal surface of sleeve pipe, eliminate oil-in-water drilling fluid to the impact of the attached wall of colloid.
2, inject high temperature fluid slug glue, be injected into glue length in pit shaft and be about 300m, adopting former drilling fluid displacing glue to implementing well section, in drilling tool, leaving 180m glue;
3, glue rises to glue top with 1/2 normal trip-out speed after having injected, small displacement wash cycles drilling tool 0.5h, and rear closing well builds the pressure 4h, treats glue plastic.
4, aftereffect is surveyed in circulation, and without leakage, without overflow, frozen glue plastic effect is better, has isolated preferably on the oil gas of bottom and has altered.
5, normally make a trip construction, and 36 hours periods are without leakage, without overflow.
6, be drilled into high temperature fluid slug top under, the efficient breaking glue solution of preparation in cementing truck tank, wherein the injection rate of gel breaker is 0.1 side, and all the other are water.By breaking glue solution pump in drilling tool, replace to nearly drill bit place, transfer drilling tool, often transfer 50 meters and inject the breaking glue solution of equal shares once, after having injected, wait for after 1.5 hours, high temperature fluid slug automatically can break glue under efficient gel breaker effect, and circulating fluid, colloid returns out.
Embodiment in October, 2 2012, high temperature fluid slug is applied at NW Hebei height XX well.
High XX well is Quercus Sec-tion Suber a bite appraisal well, the actual well depth 4503m of this well, and formation temperature is 115 DEG C, and predict geopressure coefficient is up to 1.41, and during oil test operation, surface casing pressure is up to 18MPa, on-the-spot employing 1.43g/cm
3well control fluid DeGrain, need to configure the well control fluid of greater concn, for guaranteeing formation testing tubing string trip-out job safety, simultaneously for reducing well control fluid cost, test applies high temperature fluid slug technology.
Process for preparation:
Prepare the Agitation Tank with agitator, each constituent mass per-cent is:
Host, consumption 0.25%, twin-stage linking agent, consumption 0.2%, acid-base modifier, consumption 0.33%, oxygen scavenger, consumption 0.13%, all the other are on-the-spot water.
Site operation process: connect surface pipeline, and pressure testing is qualified.
1, rise and be drilled into the above 10m of Pressure Curve in Oil Testing Well section, inject high temperature fluid slug glue, ensure that in pit shaft, glue length is about 300m, adopts 1.45g/cm
3well control fluid replaces glue to implementing well section, leaves 300m glue in drilling tool;
2, glue rises to glue top with 1/2 normal trip-out speed after having injected, small displacement wash cycles drilling tool 0.4h, and rear closing well builds the pressure 6h, treats glue plastic.
3, normally trip out tubing string, during trip-out, surface casing pressure is always zero, and high temperature fluid slug has been isolated preferably on the high-pressure oil gas of bottom and altered.
4, enter to note grey tubing string under, note grey 50m at high temperature fluid slug top, the grey 50m of well depth 800m place note, shunts in a well to this well temporarily.Utilizing under high temperature fluid slug high temperature can natural degradation principle, completes its broken glue.
Embodiment on December 2nd, 3 2012, high temperature fluid slug is applied at NW Hebei Nan Bao-PXX well.
NPxxx well five exploitation under-balanced drilling technology, due to this well objective interval fracture development, ' Safe Density Windows is narrow, gas oil ratio is high, wellbore construction process well kick, leakage comparatively serious, amount to leakage about 1158 sides, gas is altered phenomenon comparatively serious, surface casing pressure is up to 18.5MPa, and during finishing drilling, this well is still in a large amount of leakage, kill-job difficulty, well control have a big risk, and completion difficulty is large.On December 2nd, 2012, after application high temperature fluid slug technology, successfully solve leakage, well kick problem, in the making a trip of whole completion phase, sleeve pipe tieback process, within 12 days, all there is not leakage and overflow altogether, effectively evade well-completion practice risk, decreased drilling well loss, shorten completion time.This well Buried Hill Surface top temperature is 130 DEG C, and frozen glue construction well section hole deviation is 55.7 ° ~ 80.44 °.
Process for preparation:
Prepare the Agitation Tank with agitator, each constituent mass per-cent is:
Host, consumption 0.3%, twin-stage linking agent, consumption 0.25%, acid-base modifier, consumption 0.38%, oxygen scavenger, consumption 0.15%, all the other are on-the-spot water.
Site operation process:
Connect surface pipeline, and pressure testing is qualified.
1, pull out of hole to high temperature fluid section plug and implement well depth, this time construction well is that 7in tail pipe is inner.Inject 6m
3glue, adopt former well control fluid to replace glue to implementing well section, reserved about 300m glue in drilling tool, the glue length injected in 7in sleeve pipe is about 300m.
2, glue rises to glue top with 1/2 normal trip-out speed after having injected, and small displacement wash cycles drilling tool 6.5h, treats glue plastic, and period is without has channeling, without leakage.
3, normally make a trip--lower brill milling tie-back sleeve--trip-out--tieback 7in sleeve pipe--7in tie back liner section well cementation--pull out of hole--lower brill blind plate.Amount to elapsed time reach 6 days, period without leakage, without overflow, surface casing pressure is zero.
4, this well adopts drill bit pressurization cutting way to break glue, creeps into while circulating fluid, takes brokenly fritter colloid after glue in time out of.Broken glue effect is better.
Claims (2)
1. for a high temperature fluid slug glue for packing oil gas, it is characterized in that: be made up of host, twin-stage linking agent, oxygen scavenger, acid-base modifier, its each constituent mass per-cent is:
1) host: modified methyl sulfonate, 0.1%-0.3%;
2) twin-stage linking agent: organic boron, triallyl isocyanurate, dizinc acrylate resin composite, 0.05%-0.3%;
3) acid-base modifier: dinitrobenzoic acid, 0.10%-0.40%;
4) oxygen scavenger: S-WAT, 0.01%-0.2%;
All the other are water.
2. the application of the high temperature fluid slug for packing oil gas according to claim 1, is characterized in that:
1) play drilling tool paramount temperature fluid slug glue to estimate to implement, bottom well section, to complete the preparation of high temperature fluid slug glue simultaneously;
2) connection line between cementing truck, drilling tool, set up clean-out system flow passage, and carry out pressure testing, after pressure testing is qualified, in cementing truck tank, configure scavenging solution, clean-out system volume percent is 6-10%, all the other are water, to be cleaned dose even with water mixture, and inject in pit shaft by pipeline, cannula cleaning inner wall mud is polluted;
3) pipeline between high temperature fluid slug glue Agitation Tank, cementing truck is connected, set up high temperature fluid slug glue flow passage, carry out pressure testing, after pressure testing is qualified, the glue in Agitation Tank is evacuated to cementing truck, and then pump is in pit shaft, base area stressor layer situation selects drilling fluid or well control fluid to replace glue, the amount of pumping into of drilling fluid or well control fluid, to replacing glue design attitude, leaves the glue of 300 meters, is mixed in glue to prevent drilling fluid or well control fluid in drilling tool;
4) rise and be drilled into slug top, small displacement wash cycles drilling tool, rear static wait, under high temperature, between glue, each medicine interacts, 150-300 minute plastic;
5) making a trip or after well-completion practice completes, segmentation is injected efficient rapid viscosity breaker and carried out brokenly glue, and gel breaker and high temperature fluid slug glue volume percent are 1:50, is the liquid that 1:50,2h break glue and become viscosity lower with the volume ratio of water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310655084.8A CN104694093A (en) | 2013-12-06 | 2013-12-06 | High-temperature fluid slug glue solution used for sealing oil and gas, and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310655084.8A CN104694093A (en) | 2013-12-06 | 2013-12-06 | High-temperature fluid slug glue solution used for sealing oil and gas, and application thereof |
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| CN104694093A true CN104694093A (en) | 2015-06-10 |
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| CN201310655084.8A Pending CN104694093A (en) | 2013-12-06 | 2013-12-06 | High-temperature fluid slug glue solution used for sealing oil and gas, and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106147726A (en) * | 2016-06-30 | 2016-11-23 | 西南石油大学 | A kind of deep well slurry temperature resistance synergist |
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| EP1454035A2 (en) * | 2001-12-12 | 2004-09-08 | Clearwater International, L.L.C | Friction reducing composition and method |
| CN1888374A (en) * | 2005-06-28 | 2007-01-03 | 中国石油天然气股份有限公司 | High-temperature and High-Salt resisting gel water packing-off method |
| CN101135237A (en) * | 2007-10-17 | 2008-03-05 | 吐哈石油勘探开发指挥部工程技术研究院 | Method for preparing down-hole gel valve and construction method thereof |
| CN102352232A (en) * | 2011-08-05 | 2012-02-15 | 北京爱普聚合科技有限公司 | Temperature-resistant and salt-resistant polymer clean fracturing fluid thickening agent and preparation method thereof |
| CN102876304A (en) * | 2012-09-18 | 2013-01-16 | 中国石油化工股份有限公司 | Bottom water plugging agent system and process for horizontal well |
-
2013
- 2013-12-06 CN CN201310655084.8A patent/CN104694093A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1454035A2 (en) * | 2001-12-12 | 2004-09-08 | Clearwater International, L.L.C | Friction reducing composition and method |
| CN1888374A (en) * | 2005-06-28 | 2007-01-03 | 中国石油天然气股份有限公司 | High-temperature and High-Salt resisting gel water packing-off method |
| CN101135237A (en) * | 2007-10-17 | 2008-03-05 | 吐哈石油勘探开发指挥部工程技术研究院 | Method for preparing down-hole gel valve and construction method thereof |
| CN102352232A (en) * | 2011-08-05 | 2012-02-15 | 北京爱普聚合科技有限公司 | Temperature-resistant and salt-resistant polymer clean fracturing fluid thickening agent and preparation method thereof |
| CN102876304A (en) * | 2012-09-18 | 2013-01-16 | 中国石油化工股份有限公司 | Bottom water plugging agent system and process for horizontal well |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106147726A (en) * | 2016-06-30 | 2016-11-23 | 西南石油大学 | A kind of deep well slurry temperature resistance synergist |
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Application publication date: 20150610 |
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