CN106321055A - Acidization method for oil well with pump - Google Patents
Acidization method for oil well with pump Download PDFInfo
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- CN106321055A CN106321055A CN201610732077.7A CN201610732077A CN106321055A CN 106321055 A CN106321055 A CN 106321055A CN 201610732077 A CN201610732077 A CN 201610732077A CN 106321055 A CN106321055 A CN 106321055A
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
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Abstract
The invention relates to the technical field of oil well acidification, and in particular relates to an acidization method for an oil well with a pump. The acidization method comprises the following steps of step 1, when an oil well stratum is blocked or needs acidification, injecting first wax dissolution blockage relieving fluid into the stratum; step 2, injecting acid liquor into the stratum and reacting for 30-60 minutes; step 3, injecting second wax dissolution blockage relieving fluid into the stratum after reaction is finished; and step 4, injecting displacement fluid into the stratum. Compared with an existing acidification process, the acidization method is relatively good in acidification effect and relatively low in cost; furthermore, a well-repair pump lifting operation before acidification and a well-repair re-pumping task after acidification are not needed, and acidification operation can be performed on the basis of an original oil well production string under a condition of normal production of the oil well; after acidification, the oil well is directly put into production, the problems of long occupied time due to well-repair, high acidification cost and incapability of dissolving and discharging pollutants wrapped with wax crystals in the stratum in time due to well repair during pump-lifting acidification of the existing pump lifting acidification process are solved, and secondary pollution and stratum pollution are effectively avoided.
Description
Technical field
The present invention relates to oil well acidation technical field, be a kind of oil well band pump acidization tool.
Background technology
Acidifying is a kind of effective stimulation of well, and it can effectively release formation blockage, improve oil well output.Oil
Well long-term production, original formation pressure can reduce along with the output of crude oil, and prime stratum temperature declines as well as exploitation.When
After pressure as little as saturation pressure, solution gas separates out in a large number；After the temperature of crude oil is down to wax deposition point, substantial amounts of wax partial crystallization
Go out.Rock particles in oil well stratum in process of production, carbonate scale etc. can be caused formation blockage by wax crystalline substance parcel.Traditional
Acidifying does not all account for the problem of oil reservoir wax deposition, due to rock particles surface, near wellbore zone wax deposition, pollutant and carbonate scale etc.
Being wrapped up by the crystalline solid of wax, inject low temperature acidifying working solution and make reservoir temperature reduce during acidifying, the material wrapped up by wax crystalline substance is tighter
Close, cause acid solution can not effectively with pollutant reaction, so causing acidizing effect undesirable.Oil layer blocking thing to be released, must
The molten wax of palpus, molten dirt carry out simultaneously, and discharge rapidly stratum when temperature is also higher than wax deposition point, make the solute of wax and dirt with residual
Acid is discharged, thus reaches the purpose of oil layer unblocking.
Traditional acidification technique, its construction method is for proposing pump acidifying, it may be assumed that by well workover, the flow string of oil well is carried pump and makees
Industry changes acidizing treatment tubing string into, carries out acidizing treatment, takes out operation again by well workover again and change acidifying tubing string into life after acidifying
Producing tubing string makes oil well continue to produce.Shortcoming is that when accounting for product, rate is long, and a general well workover needs the time of 3 days to 7 days, if carried out
Once carry pump acidizing treatment, then need to carry out twice well workover and oil well just can be made to return to normal production, thus need to account for product 6 to 14
My god, not only have impact on yield, as twice well workover makes to be acidified cost height.After acidizing treatment, without can and
Time well workover take out operation again, the acid solution injected in stratum during early stage acidifying can not be discharged in time, thus it is dirty to produce secondary precipitation
Dye stratum, have impact on the effect of acidifying, and this is also the one of the main reasons that current acidizing effect is undesirable.
Summary of the invention
The invention provides a kind of oil well band pump acidization tool, overcome the deficiency of above-mentioned prior art, it can efficient solution
Certainly existing acidification technique acidizing effect is poor, and acidifying cost is high, after acidizing treatment, wax and dirty solute and residual acid can not and
Time discharge stratum, produce secondary precipitation pollute stratum problem.
The technical scheme is that and realized by following measures: a kind of oil well band pump acidization tool, by following step
Suddenly carry out: the first step, when oil-well strata blocks or needs acidifying, the first molten wax blockages relieving fluid is injected stratum；Second step, injects the
Inject acid solution after one molten wax blockages relieving fluid to stratum, react 30min to 60min；3rd step, reacts backward stratum and injects the second molten wax
Blockages relieving fluid；4th step, injects displacement fluid to stratum after injecting the second molten wax blockages relieving fluid；5th step, displacement fluid is directly opened after injecting
Well produces.
Further optimization and/or improvements to foregoing invention technical scheme are presented herein below:
Above-mentioned first molten wax blockages relieving fluid obtains as follows: is joined by Wax dissolving agent in the hot water of 60 DEG C to 70 DEG C and is configured to matter
Amount percentage ratio is the Wax dissolving agent aqueous solution of 2% to 4%, obtains the first molten wax blockages relieving fluid.
Above-mentioned second molten wax blockages relieving fluid obtains as follows: is joined by Wax dissolving agent in the hot water of 60 DEG C to 70 DEG C and prepares
The Wax dissolving agent aqueous solution becoming mass percent to be 2% to 4%, obtains the second molten wax blockages relieving fluid.
Above-mentioned Wax dissolving agent is C12H25SO3Na。
Above-mentioned displacement fluid is the hot water of 60 DEG C to 70 DEG C.
Above-mentioned first molten wax blockages relieving fluid, acid solution, the second molten wax blockages relieving fluid and displacement fluid be by volume 20 to 30:30 extremely
50:40 to 60:10 to 20 injects stratum.
The pressure of above-mentioned injection first molten wax blockages relieving fluid is 10MPa to 20MPa；Inject acid solution pressure be 15MPa extremely
20MPa；The pressure injecting the second molten wax blockages relieving fluid is 10MPa to 20MPa；The pressure injecting displacement fluid is 10MPa to 20MPa.
Above-mentioned acid solution is hydrochloric acid, Fluohydric acid., acidification corrosion inhibitor, cleanup additive, clay stabilizer, ferrous stability and water
Mixture；In acid solution, the weight/mass percentage composition of hydrochloric acid is 5% to 15%, and the weight/mass percentage composition of Fluohydric acid. is 2% to 5%, and acidifying is slow
The weight/mass percentage composition of erosion agent is 1% to 2%, and the weight/mass percentage composition of cleanup additive is 1% to 2%, the percent mass of clay stabilizer
Content is 1% to 2%, and the weight/mass percentage composition of ferrous stability is 0.5% to 1%.
Above-mentioned acidification corrosion inhibitor is C22H42N2O, cleanup additive is C2H4O, clay stabilizer is C5H8O2, ferrous stability
For C6H8O7。
The present invention more existing acidification technique acidizing effect is more preferably and cost is lower；Meanwhile, the present invention is made without acidifying
Before well workover carry pump operation and acidifying after well workover take out operation again, oil well normally produce in the case of at the original flow string of oil well
On the basis of can carry out acidizing treatment, after acidifying can direct opening well and making production, efficiently solve existing acidification technique when proposing pump acidifying
The problem cannot dissolved because of the pollutant wrapped up by wax crystalline substance in rate length, acidifying cost height, stratum when well workover accounts for product and discharge in time,
Effectively prevent secondary precipitation and pollute stratum.
Detailed description of the invention
The present invention is not limited by following embodiment, can determine specifically according to technical scheme and practical situation
Embodiment.
Embodiment 1, this oil well band pump acidization tool is carried out in the steps below: the first step, and oil-well strata blocks or needs acid
During change, the first molten wax blockages relieving fluid is injected stratum；Second step, injects acid solution, reaction to stratum after injecting the first molten wax blockages relieving fluid
30min to 60min；3rd step, reacts backward stratum and injects the second molten wax blockages relieving fluid；4th step, injects the second molten wax blockages relieving fluid
Displacement fluid is injected on backward stratum；5th step, displacement fluid is direct opening well and making production after injecting.Displacement fluid is direct opening well and making production after injecting,
The reacted solute such as wax and carbonate scale and residual acid can discharge ground along with oil, water etc. when temperature is also higher than wax deposition point in time
Layer, reaches the purpose of de-plugging, effectively prevent secondary precipitation and pollute stratum.Displacement fluid also can be by wax and carbonate scale after injecting
Discharge stratum is extracted in time out when temperature is also higher than wax deposition point etc. reacted solute.
Embodiment 2, this oil well band pump acidization tool, carry out in the steps below: the first step, oil-well strata blocks or needs acid
During change, the first molten wax blockages relieving fluid is injected stratum；Second step, injects acid solution, reaction to stratum after injecting the first molten wax blockages relieving fluid
30min or 60min；3rd step, reacts backward stratum and injects the second molten wax blockages relieving fluid；4th step, injects the second molten wax blockages relieving fluid
Displacement fluid is injected on backward stratum；5th step, displacement fluid is direct opening well and making production after injecting.
Embodiment 3, as the optimization of above-described embodiment, the first molten wax blockages relieving fluid obtains as follows: added by Wax dissolving agent
Enter in the hot water of 60 DEG C to 70 DEG C, be configured to the Wax dissolving agent aqueous solution that mass percent is 2% to 4%, obtain the first molten wax de-plugging
Liquid.So, after the first molten wax blockages relieving fluid is injected stratum, the first molten wax blockages relieving fluid acts on the tamper of wax crystalline substance parcel,
Making wax crystalline substance dissolve, the acid solution being subsequently implanted into can dissolve the tampers such as carbonate scale effectively.
Embodiment 4, as the optimization of above-described embodiment, the second molten wax blockages relieving fluid obtains as follows: added by Wax dissolving agent
Enter in the hot water of 60 DEG C to 70 DEG C, be configured to the Wax dissolving agent aqueous solution that mass percent is 2% to 4%, obtain the second molten wax de-plugging
Liquid.So, after the second molten wax blockages relieving fluid is injected stratum, the second molten wax blockages relieving fluid acts on and does not the most dissolve wax crystalline substance bag completely
On the tamper wrapped up in, wax crystalline substance is made to continue to dissolve.
Embodiment 5, as the optimization of above-described embodiment, Wax dissolving agent is C12H25SO3Na。
Embodiment 6, as the optimization of above-described embodiment, displacement fluid is the hot water of 60 DEG C to 70 DEG C.
Embodiment 7, as the optimization of above-described embodiment, the first molten wax blockages relieving fluid, acid solution, the second molten wax blockages relieving fluid and replacement
Liquid is that 20 to 30:30 to 50:40 to 60:10 to 20 injects stratum by volume.
Embodiment 8, as the optimization of above-described embodiment, the pressure injecting the first molten wax blockages relieving fluid is 10MPa to 20MPa；
The pressure injecting acid solution is 15MPa to 20MPa；The pressure injecting the second molten wax blockages relieving fluid is 10MPa to 20MPa；Inject and replace
The pressure of liquid is 10MPa to 20MPa.
Embodiment 9, as the optimization of above-described embodiment, acid solution is hydrochloric acid, Fluohydric acid., acidification corrosion inhibitor, cleanup additive, clay
The mixture of stabilizer, ferrous stability and water；In acid solution, the weight/mass percentage composition of hydrochloric acid is 5% to 15%, the matter of Fluohydric acid.
Amount percentage composition is 2% to 5%, and the weight/mass percentage composition of acidification corrosion inhibitor is 1% to 2%, and the weight/mass percentage composition of cleanup additive is 1%
To 2%, the weight/mass percentage composition of clay stabilizer is 1% to 2%, and the weight/mass percentage composition of ferrous stability is 0.5% to 1%.
Embodiment 10, as the optimization of above-described embodiment, acidification corrosion inhibitor is C22H42N2O, cleanup additive is C2H4O, clay
Stabilizer is C5H8O2, ferrous stability is C6H8O7。
Embodiment 11, this oil well band pump acidization tool is carried out in the steps below: the first step, Kelamayi pound sign 80368 district
After layer eight 530T2k1 oil-well strata blocking, by Wax dissolving agent C12H25SO3Na joins in the hot water of 70 DEG C, is configured to percent mass
Ratio is the first molten wax blockages relieving fluid of 4%, 30M under pressure is 20MPa3First molten wax blockages relieving fluid injects stratum；Second step, note
After entering the first molten wax blockages relieving fluid, under pressure is 20MPa, inject 45M to stratum3Acid solution, reacts 60min；3rd step, by molten wax
Agent C12H25SO3Na joins in the hot water of 68 DEG C, is configured to the second molten wax blockages relieving fluid that mass percent is 4%, after acid liquid reaction
Inject 60M to stratum under pressure is 20MPa3Second molten wax blockages relieving fluid；4th step, after injecting the second molten wax blockages relieving fluid, in pressure
Power is to inject 20M under 20MPa to stratum3Temperature is that the hot water of 69 DEG C is as displacement fluid；5th step, displacement fluid is directly opened after injecting
Well produces；Wherein: acid solution is hydrochloric acid, Fluohydric acid., C22H42N2O、C2H4O、C5H8O2、C6H8O7With the mixture of water, salt in acid solution
The weight/mass percentage composition of acid is 10%, and the weight/mass percentage composition of Fluohydric acid. is 5%, C22H42N2The weight/mass percentage composition of O is 2%,
C2H4The weight/mass percentage composition of O is 2%, C5H8O2Weight/mass percentage composition be 2%, C6H8O7Weight/mass percentage composition be 1%.
Embodiment 12, this oil well band pump acidization tool is carried out in the steps below: the first step, Kelamayi pound sign 82009 district
After layer eight 2T2k1 oil-well strata blocking, by Wax dissolving agent C12H25SO3Na joins in the hot water of 66 DEG C, is configured to mass percent
It is the first molten wax blockages relieving fluid of 3%, 25M under pressure is 17MPa3First molten wax blockages relieving fluid injects stratum；Second step, injects
After first molten wax blockages relieving fluid, under pressure is 18MPa, inject 45M to stratum3Acid solution, reacts 45min；3rd step, by Wax dissolving agent
C12H25SO3Na joins in the hot water of 66 DEG C, is configured to the second molten wax blockages relieving fluid that mass percent is 4%, after acid liquid reaction
Pressure is to inject 50M under 15MPa to stratum3Second molten wax blockages relieving fluid；4th step, after injecting the second molten wax blockages relieving fluid, at pressure
For injecting 19M under 13MPa to stratum3Temperature is that the hot water of 69 DEG C is as displacement fluid；5th step, displacement fluid directly drives a well after injecting
Produce；Wherein: acid solution is hydrochloric acid, Fluohydric acid., C22H42N2O、C2H4O、C5H8O2、C6H8O7With the mixture of water, hydrochloric acid in acid solution
Weight/mass percentage composition be 13%, the weight/mass percentage composition of Fluohydric acid. is 5%, C22H42N2The weight/mass percentage composition of O is 2%, C2H4O
Weight/mass percentage composition be 1%, C5H8O2Weight/mass percentage composition be 2%, C6H8O7Weight/mass percentage composition be 1%.
Embodiment 13, this oil well band pump acidization tool is carried out in the steps below: the first step, Kelamayi pound sign 8055 region layer
After eight 1T2k1 oil-well strata blockings, by Wax dissolving agent C12H25SO3Na joins in the hot water of 68 DEG C, is configured to mass percent and is
The first molten wax blockages relieving fluid of 3%, 27M under pressure is 17MPa3First molten wax blockages relieving fluid injects stratum；Second step, injects the
After one molten wax blockages relieving fluid, under pressure is 18MPa, inject 44M to stratum3Acid solution, reacts 40min；3rd step, by Wax dissolving agent
C12H25SO3Na joins in the hot water of 70 DEG C, is configured to the second molten wax blockages relieving fluid that mass percent is 4%, after acid liquid reaction
Pressure is to inject 50M under 15MPa to stratum3Second molten wax blockages relieving fluid；4th step, after injecting the second molten wax blockages relieving fluid, at pressure
For injecting 15M under 12MPa to stratum3Temperature is that the hot water of 65 DEG C is as displacement fluid；5th step, displacement fluid directly drives a well after injecting
Produce；Wherein: acid solution is hydrochloric acid, Fluohydric acid., C22H42N2O、C2H4O、C5H8O2、C6H8O7With the mixture of water, hydrochloric acid in acid solution
Weight/mass percentage composition be 12%, the weight/mass percentage composition of Fluohydric acid. is 5%, C22H42N2The weight/mass percentage composition of O is 2%, C2H4O
Weight/mass percentage composition be 2%, C5H8O2Weight/mass percentage composition be 1%, C6H8O7Weight/mass percentage composition be 0.5%.
Embodiment 14, this oil well band pump acidization tool is carried out in the steps below: the first step, Kelamayi pound sign 80355 district
After layer eight 530T2k1 oil-well strata blocking, by Wax dissolving agent C12H25SO3Na joins in the hot water of 70 DEG C, is configured to percent mass
Ratio is the first molten wax blockages relieving fluid of 4%, 23M under pressure is 15MPa3First molten wax blockages relieving fluid injects stratum；Second step, note
After entering the first molten wax blockages relieving fluid, under pressure is 15MPa, inject 40M to stratum3Acid solution, reacts 40min；3rd step, by molten wax
Agent C12H25SO3Na joins in the hot water of 63 DEG C, is configured to the second molten wax blockages relieving fluid that mass percent is 4%, after acid liquid reaction
Inject 50M to stratum under pressure is 15MPa3Second molten wax blockages relieving fluid；4th step, after injecting the second molten wax blockages relieving fluid, in pressure
Power is to inject 18M under 13MPa to stratum3Temperature is that the hot water of 60 DEG C is as displacement fluid；5th step, displacement fluid is directly opened after injecting
Well produces；Wherein: acid solution is hydrochloric acid, Fluohydric acid., C22H42N2O、C2H4O、C5H8O2、C6H8O7With the mixture of water, salt in acid solution
The weight/mass percentage composition of acid is 10%, and the weight/mass percentage composition of Fluohydric acid. is 5%, C22H42N2The weight/mass percentage composition of O is 2%,
C2H4The weight/mass percentage composition of O is 1%, C5H8O2Weight/mass percentage composition be 1%, C6H8O7Weight/mass percentage composition be 1%.
Embodiment 15, this oil well band pump acidization tool is carried out in the steps below: the first step, Kelamayi pound sign 82046 district
After the P1j oil-well strata blocking of floor eight district, by Wax dissolving agent C12H25SO3Na joins in the hot water of 65 DEG C, is configured to mass percent
It is the first molten wax blockages relieving fluid of 2%, 21M under pressure is 10MPa3First molten wax blockages relieving fluid injects stratum；Second step, injects
After first molten wax blockages relieving fluid, under pressure is 15MPa, inject 32M to stratum3Acid solution, reacts 30min；3rd step, by Wax dissolving agent
C12H25SO3Na joins in the hot water of 66 DEG C, is configured to the second molten wax blockages relieving fluid that mass percent is 2%, after acid liquid reaction
Pressure is to inject 43M under 12MPa to stratum3Second molten wax blockages relieving fluid；4th step, after injecting the second molten wax blockages relieving fluid, at pressure
For injecting 11M under 12MPa to stratum3Temperature is that the hot water of 60 DEG C is as displacement fluid；5th step, displacement fluid directly drives a well after injecting
Produce；Wherein: acid solution is hydrochloric acid, Fluohydric acid., C22H42N2O、C2H4O、C5H8O2、C6H8O7With the mixture of water, hydrochloric acid in acid solution
Weight/mass percentage composition be 5%, the weight/mass percentage composition of Fluohydric acid. is 5%, C22H42N2The weight/mass percentage composition of O is 2%, C2H4O's
Weight/mass percentage composition is 1%, C5H8O2Weight/mass percentage composition be 2%, C6H8O7Weight/mass percentage composition be 0.5%.
Embodiment 16, this oil well band pump acidization tool is carried out in the steps below: the first step, Kelamayi pound sign 5204 region layer
After 52 western T2k1 oil-well strata blockings, by Wax dissolving agent C12H25SO3Na joins in the hot water of 65 DEG C, is configured to mass percent
It is the first molten wax blockages relieving fluid of 3%, 25M under pressure is 14MPa3First molten wax blockages relieving fluid injects stratum；Second step, injects
After first molten wax blockages relieving fluid, under pressure is 17MPa, inject 45M to stratum3Acid solution, reacts 60min；3rd step, by Wax dissolving agent
C12H25SO3Na joins in the hot water of 66 DEG C, is configured to the second molten wax blockages relieving fluid that mass percent is 3%, after acid liquid reaction
Pressure is to inject 60M under 15MPa to stratum3Second molten wax blockages relieving fluid；4th step, after injecting the second molten wax blockages relieving fluid, at pressure
For injecting 15M under 12MPa to stratum3Temperature is that the hot water of 60 DEG C is as displacement fluid；5th step, displacement fluid directly drives a well after injecting
Produce；Wherein: acid solution is hydrochloric acid, Fluohydric acid., C22H42N2O、C2H4O、C5H8O2、C6H8O7With the mixture of water, hydrochloric acid in acid solution
Weight/mass percentage composition be 12%, the weight/mass percentage composition of Fluohydric acid. is 4%, C22H42N2The weight/mass percentage composition of O is 2%, C2H4O
Weight/mass percentage composition be 1%, C5H8O2Weight/mass percentage composition be 2%, C6H8O7Weight/mass percentage composition be 0.8%.
Embodiment 17, this oil well band pump acidization tool is carried out in the steps below: the first step, pound sign T6454 district, Kelamayi
After layer seven western T2k1 oil-well strata blocking, by Wax dissolving agent C12H25SO3Na joins in the hot water of 67 DEG C, is configured to mass percent
It is the first molten wax blockages relieving fluid of 3%, 30M under pressure is 18MPa3First molten wax blockages relieving fluid injects stratum；Second step, injects
After first molten wax blockages relieving fluid, under pressure is 16MPa, inject 45M to stratum3Acid solution, reacts 55min；3rd step, by Wax dissolving agent
C12H25SO3Na joins in the hot water of 65 DEG C, is configured to the second molten wax blockages relieving fluid that mass percent is 4%, after acid liquid reaction
Pressure is to inject 50M under 15MPa to stratum3Second molten wax blockages relieving fluid；4th step, after injecting the second molten wax blockages relieving fluid, at pressure
For injecting 18M under 13MPa to stratum3Temperature is that the hot water of 68 DEG C is as displacement fluid；5th step, displacement fluid directly drives a well after injecting
Produce；Wherein: acid solution is hydrochloric acid, Fluohydric acid., C22H42N2O、C2H4O、C5H8O2、C6H8O7With the mixture of water, hydrochloric acid in acid solution
Weight/mass percentage composition be 8%, the weight/mass percentage composition of Fluohydric acid. is 5%, C22H42N2The weight/mass percentage composition of O is 2%, C2H4O's
Weight/mass percentage composition is 2%, C5H8O2Weight/mass percentage composition be 2%, C6H8O7Weight/mass percentage composition be 1%.
Embodiment 18, this oil well band pump acidization tool is carried out in the steps below: the first step, pound sign T82096 district, Kelamayi
After layer eight 2T2k1 oil-well strata blocking, by Wax dissolving agent C12H25SO3Na joins in the hot water of 69 DEG C, is configured to mass percent
It is the first molten wax blockages relieving fluid of 4%, 28M under pressure is 18MPa3First molten wax blockages relieving fluid injects stratum；Second step, injects
After first molten wax blockages relieving fluid, under pressure is 15MPa, inject 50M to stratum3Acid solution, reacts 45min；3rd step, by Wax dissolving agent
C12H25SO3Na joins in the hot water of 67 DEG C, is configured to the second molten wax blockages relieving fluid that mass percent is 4%, after acid liquid reaction
Pressure is to inject 55M under 15MPa to stratum3Second molten wax blockages relieving fluid；4th step, after injecting the second molten wax blockages relieving fluid, at pressure
For injecting 18M under 17MPa to stratum3Temperature is that the hot water of 66 DEG C is as displacement fluid；5th step, displacement fluid directly drives a well after injecting
Produce；Wherein: acid solution is hydrochloric acid, Fluohydric acid., C22H42N2O、C2H4O、C5H8O2、C6H8O7With the mixture of water, hydrochloric acid in acid solution
Weight/mass percentage composition be 10%, the weight/mass percentage composition of Fluohydric acid. is 4%, C22H42N2The weight/mass percentage composition of O is 2%, C2H4O
Weight/mass percentage composition be 2%, C5H8O2Weight/mass percentage composition be 2%, C6H8O7Weight/mass percentage composition be 1%.
Data before the embodiment of the present invention 11 to embodiment 18 is acidified with existing acidification technique and after acidifying are shown in Table 1；
As it can be seen from table 1 the embodiment of the present invention 11 to embodiment 18 acidifying after Liquid output and oil production be relatively acidified before Liquid output
Have with oil production and promote by a relatively large margin, and the Liquid output after the oil well band more existing acidification technique of pump acidization tool of the present invention acidifying
Bigger with oil production increase rate, illustrate that oil well band pump acidization tool more existing acidification technique acidizing effect of the present invention is more preferable.
Meanwhile, the well workover before the oil well band more existing acidification technique of pump acidization tool of the present invention is made without acidifying carries pump and makees
Operation is taken out in well workover after industry and acidifying again, and oil well can be carried out in the case of normally producing on the basis of the original flow string of oil well
Acidizing treatment, after acidifying can direct opening well and making production, efficiently solve when existing acidification technique proposes pump acidifying because of rate when well workover accounts for product
Long, that acidifying cost is high problem, oil well band pump acidization tool of the present invention can efficiently solve the pollution wrapped up by wax crystalline substance in stratum
The problem that thing cannot dissolve, after acidifying, during opening well and making production, wax and the solute of dirt and residual acid are arranged along with oil, water etc. are timely
Go out stratum, reach the purpose of de-plugging, it is possible to be prevented effectively from secondary precipitation and pollute stratum；Calculate by annual average 30 mouthfuls of wells of acidifying,
Cost-effective 6 ten thousand to 10 ten thousand yuan of oil well band pump acidization tool more existing acidification technique a bite well of the present invention, saves 1,800,000 in 1 year altogether
To 3,000,000 yuan, illustrate that the oil well band more existing acidification technique of pump acidization tool of the present invention is greatly saved production cost.
In sum, the present invention more existing acidification technique acidizing effect is more preferably and cost is lower；Meanwhile, the present invention need not
Operation is taken out in well workover after well workover before being acidified proposes pump operation and acidifying again, and oil well is original at oil well in the case of normally producing
Acidizing treatment can be carried out on the basis of flow string, after acidifying can direct opening well and making production, efficiently solve existing acidification technique and carry
During pump acidifying, the pollutant because being wrapped up by wax crystalline substance in rate length, acidifying cost height, stratum when well workover accounts for product cannot dissolve and arrange in time
The problem gone out, effectively prevent secondary precipitation and pollutes stratum.
Above technical characteristic constitutes embodiments of the invention, and it has stronger adaptability and implementation result, can basis
It is actually needed the non-essential technical characteristic of increase and decrease, meets the demand of different situations.
Claims (9)
1. an oil well band pump acidization tool, it is characterised in that carry out in the steps below: the first step, oil-well strata blocking or needs
During acidifying, the first molten wax blockages relieving fluid is injected stratum；Second step, injects acid solution, instead to stratum after injecting the first molten wax blockages relieving fluid
Answer 30min to 60min；3rd step, reacts backward stratum and injects the second molten wax blockages relieving fluid；4th step, injects the second molten wax de-plugging
Inject displacement fluid to stratum after liquid；5th step, displacement fluid is direct opening well and making production after injecting.
Oil well band pump acidization tool the most according to claim 1, it is characterised in that the first molten wax blockages relieving fluid is as follows
Obtain: Wax dissolving agent is joined the hot water of 60 DEG C to 70 DEG C is configured to the Wax dissolving agent aqueous solution that mass percent is 2% to 4%,
Obtain the first molten wax blockages relieving fluid.
Oil well band pump acidization tool the most according to claim 1 and 2, it is characterised in that the second molten wax blockages relieving fluid presses following side
Method obtains: Wax dissolving agent joins to be configured to the Wax dissolving agent that mass percent is 2% to 4% in the hot water of 60 DEG C to 70 DEG C water-soluble
Liquid, obtains the second molten wax blockages relieving fluid.
4. according to the oil well band pump acidization tool described in Claims 2 or 3, it is characterised in that Wax dissolving agent is C12H25SO3Na。
5. according to the oil well band pump acidization tool described in claim 1 or 2 or 3 or 4, it is characterised in that displacement fluid be 60 DEG C to 70
DEG C hot water.
6. according to the oil well band pump acidization tool described in claim 1 or 2 or 3 or 4 or 5, it is characterised in that the first molten wax de-plugging
Liquid, acid solution, the second molten wax blockages relieving fluid and displacement fluid are that 20 to 30:30 to 50:40 to 60:10 to 20 injects stratum by volume.
7. according to the oil well band pump acidization tool described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterised in that inject first molten
The pressure of wax blockages relieving fluid is 10MPa to 20MPa；The pressure injecting acid solution is 15MPa to 20MPa；Inject the second molten wax blockages relieving fluid
Pressure be 10MPa to 20MPa；The pressure injecting displacement fluid is 10MPa to 20MPa.
8. according to the oil well band pump acidization tool described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7, it is characterised in that acid solution is
The mixture of hydrochloric acid, Fluohydric acid., acidification corrosion inhibitor, cleanup additive, clay stabilizer, ferrous stability and water；Hydrochloric acid in acid solution
Weight/mass percentage composition be 5% to 15%, the weight/mass percentage composition of Fluohydric acid. is 2% to 5%, the weight/mass percentage composition of acidification corrosion inhibitor
Being 1% to 2%, the weight/mass percentage composition of cleanup additive is 1% to 2%, and the weight/mass percentage composition of clay stabilizer is 1% to 2%, iron ion
The weight/mass percentage composition of stabilizer is 0.5% to 1%.
Oil well band pump acidization tool the most according to claim 8, it is characterised in that acidification corrosion inhibitor is C22H42N2O, the row of helping
Agent is C2H4O, clay stabilizer is C5H8O2, ferrous stability is C6H8O7。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610732077.7A CN106321055A (en) | 2016-08-26 | 2016-08-26 | Acidization method for oil well with pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610732077.7A CN106321055A (en) | 2016-08-26 | 2016-08-26 | Acidization method for oil well with pump |
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| Publication Number | Publication Date |
|---|---|
| CN106321055A true CN106321055A (en) | 2017-01-11 |
Family
ID=57791991
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610732077.7A Pending CN106321055A (en) | 2016-08-26 | 2016-08-26 | Acidization method for oil well with pump |
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| Country | Link |
|---|---|
| CN (1) | CN106321055A (en) |
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2016
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Application publication date: 20170111 |