CN105482801A - Oil and water well polyacid blocking remover - Google Patents
Oil and water well polyacid blocking remover Download PDFInfo
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- CN105482801A CN105482801A CN201510830878.2A CN201510830878A CN105482801A CN 105482801 A CN105482801 A CN 105482801A CN 201510830878 A CN201510830878 A CN 201510830878A CN 105482801 A CN105482801 A CN 105482801A
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/725—Compositions containing polymers
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
- C09K8/78—Eroding chemicals, e.g. acids combined with additives added for specific purposes for preventing sealing
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/885—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- 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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The invention relates to an oil and water well polyacid blocking remover. The blocking remover comprises 10-15% of hydrochloric acid, 6-8% of fluoroboric acid, 12-15% of modified silicic acid, 1-2% of anti-swelling agent, 1-2% of an iron ion stabilizer, 1-2% of a demulsifying cleanup additive, 1-2% of a water damage treatment agent, 2-4% of a corrosion inhibitor, 6-8% of a precipitation inhibitor, and the balance of water. Inorganic acids in the blocking remover are hydrochloric acid and fluoroboric acid, and hydrochloric acid can corrode the calcareous components of reservoir; and fluoroboric acid can corrode solid phase components, and has a loose sandstone bonding effect. An organic acid in the blocking remover is modified silicic acid, and can solve organic obstruction in a drilling fluid. The blocking remover can solve the problems of loose sandstone reservoir mud and drilling fluid pollution and obstruction and low corrosion rate of low-permeability reservoir acid solution blocking removers of present oil wells, and also has a low skeleton corrosion effect.
Description
Technical field
The invention belongs to oil-field development chemical increasing production increase water injection technology field, relate to a kind of oil and water well polyprotonic acid unblocking agent.
Background technology
Oil and water well acidifying is effective technology means of oilfield stimulation augmented injection, but the single acid fluid system of current domestic routine effect in some comprehensive injuries of solution is unsatisfactory, therefore start to adopt multiple elements design class Acidizing fluid, it have cost low, solve comprehensively injure, the easily row of returning, advantage such as saving cultivation scale etc.
But adopt multiple elements design class acid fluid system still to there are problems.Such as the compound system strength of acid of inorganic acid fluid composition is large, and fragile reservoir skeleton, Corrosion Of Steel rate are high, mainly for LOW PERMEABILITY RESERVOIR; The compound acid solution of emulsified easily causes oil-water emulsion, the row's of returning difficulty, and only can for calcareous, colloid blocking; Combined oxidation type composite blockage relieving agent has certain security risk, and only for blockings such as drilling fluids.
The domestic one that lacks in oil and water well acidifying can solve the multiple injury problem such as shale, drilling fluid at present, is adapted to again the different reservoir such as hypotonic, understressed sand, also has the acid fluid system of low corrosion, low corrosion skeleton function.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of oil and water well polyprotonic acid unblocking agent is provided, many-sided injury problems such as understressed sand reservoir shale and drilling fluid contamination block, low permeability reservoir acid solution unblocking agent corrosion rate is low of current oil well existence can be solved simultaneously, also there is low corrosion, low corrosion skeleton function.
A kind of oil and water well polyprotonic acid unblocking agent provided by the present invention, is characterized in that: this unblocking agent is the mixture of two kinds of mineral acids, a kind of organic acid, six kinds of additives and water, and proportion of composing is:
Hydrochloric acid 10-15%;
The swollen sour 6-8% of fluorine;
Modification silicic acid 12-15%;
Expansion-resisting agent 1-2%;
Fe stabilizer 1-2%;
Demulsification cleanup agent 1-2%;
Water injury treatment agent is 1-2%;
Inhibiter is 2-4%;
Precipitating inhibitor 6-8%;
Surplus is water.
Polyprotonic acid unblocking agent is synthesized by following method:
(1) each raw material preferred concentration is: technical hydrochloric acid 31%, fluorine swollen sour 40%, modification silicic acid 100%, expansion-resisting agent 100%, Fe stabilizer 100%, demulsification cleanup agent 100%, water injury treatment agent 100%, precipitating inhibitor 100%, inhibiter 100%, as the single product of synthesis, are mixed with polyprotonic acid unblocking agent.
Need during preparation in sour tank, first first add technical hydrochloric acid, the swollen acid of fluorine, modification silicic acid, expansion-resisting agent, Fe stabilizer, demulsification cleanup agent, water injury treatment agent, precipitating inhibitor stoste, in normal pressure, under normal temperature condition, mixing generates acid solution.
(2) in stirred pot, add inhibiter respectively, add half water, and stir, after it all dissolves, pump in sour tank, finally again second half water is added, normal pressure, under normal temperature condition, pump recycle acid pot liquid 60 minutes, forms polyprotonic acid unblocking agent.
In unblocking agent, mineral acid is hydrochloric acid and the swollen acid of fluorine, the calcareous composition of hydrochloric acid energy corrosion reservoir; Fluorine swollen acid energy corrosion solid-phase component, has understressed sand adhesive effect simultaneously.Organic acid is modification silicic acid, its can corrosion reservoir clay and feldspar, organic plugging in solution drilling fluid.
Additive-package is containing expansion-resisting agent, Fe stabilizer, demulsification cleanup agent, water injury treatment agent, inhibiter, precipitating inhibitor.
Wherein inhibiter is tetrahydroglyoxaline, and it can make system have and prevent Corrosion Of Steel function;
Expansion-resisting agent is ammonium chloride, and it can make system have and prevent clay swelling and fine migration function;
Fe stabilizer is citric acid, and it can enable system stabilizing trivalent iron ion, has and prevents iron precipitate function;
Demulsification cleanup agent is alkyl polyoxyethylene ether, and it can make system have profit breakdown of emulsion and easily return row function;
Water injury treatment agent is fluorocarbon surfactant, preferred FC4430, and it significantly can reduce oil water interfacial tension, makes system have solution and to dewater lock function;
Precipitating inhibitor is amino trimethylammonium methylenephosphonic acid, and it can make system have secondary sedimentation effects such as suppressing Calcium Fluoride (Fluorspan), Sodium Silicofluoride, potassium silicofluoride.
The invention has the beneficial effects as follows:
The invention provides a kind of oil and water well polyprotonic acid unblocking agent, it can solve the multiple injury problem such as shale, drilling fluid, is adapted to again the different reservoir such as hypotonic, understressed sand, also has low corrosion, low corrosion skeleton function.Meanwhile, it for on-the-spot de-plugging operation have effective, cost is low, easily the row of returning, save the advantage such as cultivation scale.Many-sided injury problems such as this unblocking agent can solve understressed sand reservoir shale and drilling fluid contamination blocking that current oil well exists simultaneously, low permeability reservoir acid solution unblocking agent corrosion rate is low, also have low corrosion, low corrosion skeleton function.
Accompanying drawing explanation
Fig. 1 is Xijiang 23-1 oil field 4 well 1878m place landwaste schematic diagram;
Fig. 2 a is water dissolution FLOPRO drilling fluid residue experiment schematic diagram;
Fig. 2 b is that polyprotonic acid unblocking agent dissolves FLOPRO drilling fluid residue experiment schematic diagram;
Fig. 3 is LF13-1 oil field 6 well acidizing performance curve;
Fig. 4 is LF13-1 oil field 6 well acidizing operation effectiveness curve.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment 1:
1. use water, technical hydrochloric acid 31%, fluorine swollen sour 40%, modification silicic acid 100%, expansion-resisting agent 100%, Fe stabilizer 100%, demulsification cleanup agent 100%, water injury treatment agent 100%, precipitating inhibitor 100%, inhibiter 100% as the single product of synthesis, be mixed with polyprotonic acid unblocking agent.
Wherein technical hydrochloric acid 31%, fluoroboric acid 40% are the conventional chemicals in market; Modification silicic acid 100% derives from Tianjin Tiancheng Chemical Co., Ltd. or Tianjin Hong Ping development in science and technology company limited.
In additive, expansion-resisting agent is ammonium chloride;
In additive, Fe stabilizer 100% is citric acid;
In additive, demulsification cleanup agent is alkyl polyoxyethylene ether;
In additive, water injury treatment agent 100% is fluorocarbon surfactant FC4430;
In additive, precipitating inhibitor 100% is amino trimethylammonium methylenephosphonic acid;
In additive, inhibiter 100% is tetrahydroglyoxaline.
2. polyprotonic acid unblocking agent ratio is hydrochloric acid 10-15%, the swollen sour 6-8% of fluorine, modification silicic acid 12-15%; Treatment agent is respectively 1-2% to the injury of expansion-resisting agent, Fe stabilizer, demulsification cleanup agent, water, inhibiter is 2-4%, precipitating inhibitor 6-8%.
Wherein the combination of expansion-resisting agent, Fe stabilizer, demulsification cleanup agent, water injury treatment agent, inhibiter, precipitating inhibitor is as above as described in embodiment.
The concrete composition form that polyprotonic acid unblocking agent can be formed is as follows:
Composition form 1:
Swollen sour 6%, the modification silicic acid 12% of hydrochloric acid 10%, fluorine; Ammonium chloride 1%, citric acid 1%, alkyl polyoxyethylene ether 1%, fluorocarbon surfactant FC44301%, tetrahydroglyoxaline 2%, amino trimethylammonium methylenephosphonic acid 6%, surplus are water.
Composition form 2:
Swollen sour 6%, the modification silicic acid 12% of hydrochloric acid 10%, fluorine; Ammonium chloride 2%, citric acid 2%, alkyl polyoxyethylene ether 2%, fluorocarbon surfactant FC44302%, tetrahydroglyoxaline 4%, amino trimethylammonium methylenephosphonic acid 8%, surplus are water.
Composition form 3:
Swollen sour 7%, the modification silicic acid 13% of hydrochloric acid 12%, fluorine; Ammonium chloride 1%, citric acid 1%, alkyl polyoxyethylene ether 1%, fluorocarbon surfactant FC44301%, tetrahydroglyoxaline 2%, amino trimethylammonium methylenephosphonic acid 6%, surplus are water.
Composition form 4:
Swollen sour 7%, the modification silicic acid 13% of hydrochloric acid 12%, fluorine; Ammonium chloride 2%, citric acid 2%, alkyl polyoxyethylene ether 2%, fluorocarbon surfactant FC44302%, tetrahydroglyoxaline 4%, amino trimethylammonium methylenephosphonic acid 8%, surplus are water.
Composition form 5:
Swollen sour 8%, the modification silicic acid 15% of hydrochloric acid 15%, fluorine; Ammonium chloride 1%, citric acid 1%, alkyl polyoxyethylene ether 1%, fluorocarbon surfactant FC44301%, tetrahydroglyoxaline 2%, amino trimethylammonium methylenephosphonic acid 6%, surplus are water.
Composition form 6:
Swollen sour 8%, the modification silicic acid 15% of hydrochloric acid 15%, fluorine; Ammonium chloride 2%, citric acid 2%, alkyl polyoxyethylene ether 2%, fluorocarbon surfactant FC44302%, tetrahydroglyoxaline 4%, amino trimethylammonium methylenephosphonic acid 8%, surplus are water.
Need during preparation in sour tank, first add technical hydrochloric acid, the swollen acid of fluorine, modification silicic acid, expansion-resisting agent, Fe stabilizer, demulsification cleanup agent, water injury treatment agent, precipitating inhibitor stoste, in normal pressure, under normal temperature condition, mixing generates acid solution.
3. in stirred pot, add the water of inhibiter, half ratio respectively, and stir, after it all dissolves, pump in sour tank, finally again the water of remaining proportion is added, normal pressure, under normal temperature condition, pump recycle acid pot liquid 60 minutes, forms polyprotonic acid unblocking agent.
Embodiment 2:
Polyprotonic acid unblocking agent dissolves on-the-spot shale understressed sand landwaste test examples:
Test raw material: (oil reservoir mean permeability is 460 × 10 to ocean Xijiang 23-1 oil field 4 well 1878m place landwaste
-3μm
2, average pore is 22.5%; Shale is about 15.2-19.6%), as shown in Fig. 1 (Xijiang 23-1 oil field 4 well 1878m place landwaste schematic diagram).
Evaluation method: according to SY/T5336-2006 " rock core conventional method of analysis " method process test landwaste, take landwaste and be about 5g (precision 0.001g), insert (acid liquid reaction cup is preheating 15min in the water-bath of 90 DEG C first) in the reaction cup that 100ml acid solution is housed, then confined reaction cup, takes out after reacting 2h in 90 DEG C of water-baths.Filtrate after reaction is poured in the filter paper on funnel support, filters, and reaction cup is cleaned up, use distilled water constantly to rinse, until filtrate PH is about 7 after filtering.Rock core after filtration and filter paper are put into the baking oven of 105 DEG C, dry 4h, rear taking-up, inserts in drying basin and is cooled to room temperature.Weigh with scale the rock core after drying and filter paper quality (precision 0.001g), and calculate landwaste corrosion situation before and after test, represents with corrosion rate (before and after reaction, landwaste weight difference accounts for protolith bits part by weight).
Test conditions: laboratory experiment dissolution time 2 hours, the formation temperature of 90 DEG C of simulation landwaste.
Test in place sample: the polyprotonic acid unblocking agent obtained by embodiment 1.
Test result is as follows:
Table 1 polyprotonic acid unblocking agent dissolves on-the-spot understressed sand test-results table
Embodiment 3:
Polyprotonic acid unblocking agent dissolves drilling fluid example:
Test raw material: ocean uses FLOPRO drilling fluid, inserts FLOPRO mud and carry out aging in 105 DEG C of baking ovens, obtained residue.
Evaluation method: adopt acid solution and residue to carry out corrosion experiment, each sample takes residue and is about 5g, adds respectively in 100mL acid fluid system.
Test conditions: laboratory experiment dissolution time 2 hours, 90 DEG C of simulated formation temperature.
Test in place sample: the polyprotonic acid unblocking agent obtained by embodiment 1.
Test result is as follows:
In polyprotonic acid unblocking agent after reaction, overall solution colour becomes dark-brown, and viscosity is consistent with water, without gluey insolubles, bottom only has minority fines to precipitate, in order to when verification the verifying results, add water especially, observe and find that residue is in water, solution colour is unchanged, and viscosity increases, there is jelly, as shown in Fig. 2 (dissolve FLOPRO drilling fluid residue experiment schematic diagram, Fig. 2 a is water dissolution residue comparison diagram, and Fig. 2 b is polyprotonic acid unblocking agent dissolved residue design sketch).After reaction, reactant is inserted in quantitative paper and filter, then filter paper is inserted in 105 DEG C of baking ovens, fully dry, after experiment, find that drilling fluid residue corrosion rate is 95-99%.
Table 2 polyprotonic acid unblocking agent dissolves drilling fluid test-results table
Embodiment 4:
Polyprotonic acid unblocking agent dissolves hypotonic landwaste example:
Test raw material: well 2752m place, 13-1 oil field 4, Lufeng, ocean landwaste, 2756m place landwaste (oil reservoir porosity 10.8 ~ 27.8%, rate of permeation 0.84 ~ 71.2 × 10
-3um
2).
Evaluation method: with embodiment 2.
Test conditions: laboratory experiment dissolution time 2 hours, the formation temperature of 90 DEG C of simulation landwaste.
Test in place sample: the polyprotonic acid unblocking agent obtained by embodiment 1.
Test result is as follows:
Table 3 polyprotonic acid unblocking agent dissolves on-the-spot low-permeability sandstone test-results table
Embodiment 5:
Polyprotonic acid unblocking agent dissolves low permeability cores example:
Test raw material: well (2508.84-2509.16m) place, LF13-1 oil field 2, ocean rock core (oil reservoir porosity 10.8 ~ 27.8%, rate of permeation 0.84 ~ 71.2 × 10
-3um
2).
Evaluation method: get natural core, oil-containing rock sample needs pre-treatment, after de-oiling is dried, puts into after drying tower is cooled to room temperature, measure, weigh, then find time with kerosene saturated, and calculate its volume of voids, then this rock core is put into core holding unit, displacement is carried out with simulated formation water, after pressure stabilisation, METHOD FOR CONTINUOUS DETERMINATION force value and flow, core permeability when calculating initial displacement of averaging.Open and instead note pipeline, by acid fluid system displacement in rock core, displacement 2PV, termination of pumping 4 hours.Change and just note pipeline, change simulated formation water drive is replaced, until pressure-stabilisation, after discharging, calculates core permeability without acid solution.
Test conditions: the formation temperature of 90 DEG C of simulation landwaste.
Test in place sample: the polyprotonic acid unblocking agent obtained by embodiment 1.
Test result is as follows:
Table 4 polyprotonic acid unblocking agent dissolves on-the-spot low-permeability sandstone test-results table
Embodiment 6:
Polyprotonic acid unblocking agent is to Corrosion Of Steel test examples:
Test raw material: N80 test piece (being of a size of 50 × 10 × 3)
Evaluation method: reference standard SY/T5405 performs.Adopt lacing film vector method, at normal pressure, under temperature 90 DEG C of conditions, the test piece weighed (N80 steel) is put into the acid solution solution being added with 2% inhibiter of constant temperature, ensure that test piece all surfaces contacts with acid solution.After soaking 4h, take out test piece, weigh after cleaning, drying treatment, calculate its erosion rate.
Test conditions: 90 DEG C, 4h.
Test in place sample: the polyprotonic acid unblocking agent obtained by embodiment 1.
Test result is as follows:
Table 5 polyprotonic acid unblocking agent is to Corrosion Of Steel test-results table
Embodiment 7:
Polyprotonic acid unblocking agent is to reservoir skeleton (quartz) injury test examples:
Test raw material: industrial quartz sand
Evaluation method: take 4g industry quartz sand, be that 1:20 ratio mixes with acid fluid system according to mass ratio, under 90 DEG C of conditions, react 2 hours, the corrosion rate before and after assaying reaction.
Test conditions: 90 DEG C, 2h.
Test in place sample: the polyprotonic acid unblocking agent obtained by embodiment 1.
Test result is as follows:
Table 5 polyprotonic acid unblocking agent is to reservoir skeleton (quartz) injury test-results table
Embodiment 8:
Polyprotonic acid unblocking agent rig-site utilization example:
1. this system is applied to South China Sea east oilfields XJ24-3 oil field A4ST1 well.This well faces hypotonic, the problem such as High water cut, shale index are high, drilling fluid contamination.Before de-plugging operation, this well daily fluid production rate 569.9m
3, daily oil production 31.9m
3, after adopting polyprotonic acid unblocking agent to carry out de-plugging operation, daily fluid production rate is increased to 668.6m
3, daily oil production is increased to 63.1m
3, daily oil production improves one times nearly, and validity period was more than 16 months.
2. this system is applied to South China Sea east oilfields XJ24-3 oil field A9 well.This well reservoir loosens, and drawdown pressure is excessive, and fine migration causes the blocking injury in nearly borehole wall area, and in addition, well workover high viscous stays the blocking injury that also result in nearly near wellbore.After carrying out de-plugging operation by this polyprotonic acid unblocking agent system, daily fluid production rate is from 187.6m
3be increased to 943.1m
3, daily oil production is from 7.5m
3be increased to 40.1m
3, system implementation Be very effective, oil increasing effect is that (this well carries out reservoir blockages relieving operation, day oil increment 15.5m for the twice of other medicament implementation result
3).
3. this system is applied to 13-1 oil field 6, Lufeng well.This well payzone belongs to low porosity and low permeability reservoir, and physical property is poor, and reservoir argillo calcareous is heavier.Before de-plugging operation (15/1/24), liquid measure 778.81bbl, oily 409.96bbl, moisture 47.76%; After de-plugging operation (15/5/4), liquid measure 2211.16bbl, oily 613.38bbl, moisture 72.26%.This well operations curve is as shown in Fig. 3 (LF13-1 oil field 6 well acidizing performance curve), and the squeezing stage, from 3.41bpm2757psi, changes to 4.28bpm2035psi, in the infusion displacing liquid stage, reaches 5.83bpm1850psi, the fast 25bph of static leakage after acidifying.Shown in this well operations design sketch 4 (LF13-1 oil field 6 well acidizing operation effectiveness curve).
In sum, polyprotonic acid unblocking agent can be implemented according to embodiment 1.This system can be loosened for shale, low permeability reservoir de-plugging effective (embodiment 2,4,5), can remove drilling fluid damage (embodiment 3), and this system is to Corrosion Of Steel less (embodiment 6), to reservoir skeleton injury less (embodiment 7).Polyprotonic acid unblocking agent is used for on-the-spot de-plugging operation effectiveness better (embodiment 8).
A kind of oil and water well polyprotonic acid unblocking agent that the present invention discloses and proposes, those skilled in the art are by using for reference present disclosure, suitable composition realizes, although technology of the present invention is described by preferred embodiment, person skilled obviously can change Method and Technology route as herein described or reconfigure not departing from content of the present invention, spirit and scope, realizes final technology of preparing.Special needs to be pointed out is, all similar replacements and change apparent to those skilled in the art, they are deemed to be included in spirit of the present invention, scope and content.
Claims (8)
1. an oil and water well polyprotonic acid unblocking agent, it is characterized in that composition and percentage composition as follows:
Hydrochloric acid 10-15%;
The swollen sour 6-8% of fluorine;
Modification silicic acid 12-15%;
Expansion-resisting agent 1-2%;
Fe stabilizer 1-2%;
Demulsification cleanup agent 1-2%;
Water injury treatment agent is 1-2%;
Inhibiter is 2-4%;
Precipitating inhibitor 6-8%;
Surplus is water.
2. unblocking agent as claimed in claim 1, is characterized in that described inhibiter is tetrahydroglyoxaline.
3. unblocking agent as claimed in claim 1, is characterized in that described expansion-resisting agent is ammonium chloride.
4. unblocking agent as claimed in claim 1, is characterized in that described Fe stabilizer is citric acid.
5. unblocking agent as claimed in claim 1, is characterized in that described demulsification cleanup agent is alkyl polyoxyethylene ether.
6. unblocking agent as claimed in claim 1, is characterized in that described water injury treatment agent is fluorocarbon surfactant.
7. unblocking agent as claimed in claim 6, is characterized in that described fluorocarbon surfactant is FC4430.
8. unblocking agent as claimed in claim 1, is characterized in that described precipitating inhibitor is amino trimethylammonium methylenephosphonic acid.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106433607A (en) * | 2016-09-09 | 2017-02-22 | 中国海洋石油总公司 | Combined synergistic acid system for sandstone |
| CN106634917A (en) * | 2016-12-01 | 2017-05-10 | 中国石油天然气股份有限公司 | Plug removal agent for oil-water well of tight oil reservoir |
| CN106811186A (en) * | 2017-01-12 | 2017-06-09 | 大庆市杰森钻采助剂厂 | A kind of acidification blocking remover |
| CN107043618A (en) * | 2016-11-14 | 2017-08-15 | 青海华鑫石油材料有限责任公司 | A kind of oil gas field organic composite de-plugging agent and preparation method thereof |
| CN108102623A (en) * | 2017-12-26 | 2018-06-01 | 中国石油天然气股份有限公司 | A kind of efficient deep layer de-plugging agent |
| CN108441200A (en) * | 2018-04-24 | 2018-08-24 | 长春市华泰石油科技开发有限公司 | Inorganic de-blocking agent and preparation method thereof |
| CN108517204A (en) * | 2018-04-11 | 2018-09-11 | 扬州润达油田化学剂有限公司 | A kind of three-in-one acidification blocking remover and its application process for de-plugging of well |
| CN108611084A (en) * | 2016-12-10 | 2018-10-02 | 中国石油天然气股份有限公司 | Complexing agent for Reservoir Acidization and preparation method thereof, application |
| CN111849454A (en) * | 2020-07-14 | 2020-10-30 | 东方宝麟科技发展(北京)有限公司 | Soluble bridge plug dissolution assisting system and shale gas horizontal well soluble bridge plug dissolution assisting card process |
| CN113930231A (en) * | 2021-12-17 | 2022-01-14 | 中海油田服务股份有限公司 | Water-based well completion fluid and preparation and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089118A (en) * | 2006-06-16 | 2007-12-19 | 长江大学 | Acidifying agent composition |
| CN102634332A (en) * | 2012-03-26 | 2012-08-15 | 中国石油天然气股份有限公司 | Blockage remover for decompression and steam injection in high clay content sandstone oil reservoir |
-
2015
- 2015-11-25 CN CN201510830878.2A patent/CN105482801A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089118A (en) * | 2006-06-16 | 2007-12-19 | 长江大学 | Acidifying agent composition |
| CN102634332A (en) * | 2012-03-26 | 2012-08-15 | 中国石油天然气股份有限公司 | Blockage remover for decompression and steam injection in high clay content sandstone oil reservoir |
Non-Patent Citations (5)
| Title |
|---|
| 吴安林: "砂岩基质酸化酸液体系发展现状及展望", 《重庆科技学院学报（自然科学版）》 * |
| 樊世忠: "第三节 解堵机理", 《完井液与修井液》 * |
| 毛凤鸣: "《复杂小断块石油勘探开发技术》", 30 April 2005 * |
| 贾辉: "复合解堵工艺的研究与应用-以涠洲11-4油田为例", 《石油天然气学报》 * |
| 郑力: "地层温度下疏松砂岩酸溶实验研究", 《油气井测试》 * |
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| CN106433607A (en) * | 2016-09-09 | 2017-02-22 | 中国海洋石油总公司 | Combined synergistic acid system for sandstone |
| CN107043618A (en) * | 2016-11-14 | 2017-08-15 | 青海华鑫石油材料有限责任公司 | A kind of oil gas field organic composite de-plugging agent and preparation method thereof |
| CN106634917A (en) * | 2016-12-01 | 2017-05-10 | 中国石油天然气股份有限公司 | Plug removal agent for oil-water well of tight oil reservoir |
| CN108611084A (en) * | 2016-12-10 | 2018-10-02 | 中国石油天然气股份有限公司 | Complexing agent for Reservoir Acidization and preparation method thereof, application |
| CN106811186A (en) * | 2017-01-12 | 2017-06-09 | 大庆市杰森钻采助剂厂 | A kind of acidification blocking remover |
| CN108102623A (en) * | 2017-12-26 | 2018-06-01 | 中国石油天然气股份有限公司 | A kind of efficient deep layer de-plugging agent |
| CN108517204A (en) * | 2018-04-11 | 2018-09-11 | 扬州润达油田化学剂有限公司 | A kind of three-in-one acidification blocking remover and its application process for de-plugging of well |
| CN108441200A (en) * | 2018-04-24 | 2018-08-24 | 长春市华泰石油科技开发有限公司 | Inorganic de-blocking agent and preparation method thereof |
| CN111849454A (en) * | 2020-07-14 | 2020-10-30 | 东方宝麟科技发展(北京)有限公司 | Soluble bridge plug dissolution assisting system and shale gas horizontal well soluble bridge plug dissolution assisting card process |
| CN111849454B (en) * | 2020-07-14 | 2022-08-12 | 东方宝麟科技发展(北京)有限公司 | Soluble bridge plug dissolution assisting system and shale gas horizontal well soluble bridge plug dissolution assisting card process |
| CN113930231A (en) * | 2021-12-17 | 2022-01-14 | 中海油田服务股份有限公司 | Water-based well completion fluid and preparation and application thereof |
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