CN101597488A - High solid phase drilling fluid filter cake removal treating fluid - Google Patents
High solid phase drilling fluid filter cake removal treating fluid Download PDFInfo
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- CN101597488A CN101597488A CNA2009100867398A CN200910086739A CN101597488A CN 101597488 A CN101597488 A CN 101597488A CN A2009100867398 A CNA2009100867398 A CN A2009100867398A CN 200910086739 A CN200910086739 A CN 200910086739A CN 101597488 A CN101597488 A CN 101597488A
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Abstract
High solid phase drilling fluid filter cake removal treating fluid is applied to petroleum drilling, completion technique field.Comprise three kinds of treatment solutions, each component of cleaning breaking glue solution is: dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether (OP-4), polyoxyethylene nonylphenol ether (OP-10), 8-10 polyoxyethylenated alcohol, ammonium persulphate, Repone K and water; Each component of corrosion breaking glue solution is: acetic acid, hydrochloric acid, hydrofluoric acid, inhibiter SA1-3, ammonium citrate and water; Each component of back scavenging solution is: dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether (OP-4), polyoxyethylene nonylphenol ether (OP-10), 8-10 polyoxyethylenated alcohol, Repone K and water.Remove drilling fluid filter cake stage by stage by cleaning brokenly glue, the broken glue of corrosion and back cleaning, corrosion rate to solid phase in the filter cake increases substantially, corrosion rate to organic positive colloid drilling fluid filter cake has improved 3.5 times, dredges horizontal well immediate vicinity of wellbore reservoir seepage channel effectively.
Description
Technical field
The present invention relates to petroleum drilling, completion technique field, particularly drilling fluid filter cake is a kind of treatment solution of removing high solid phase drilling fluid filter cake.
Background technology
At present, in petroleum horizontal well completion process, adopt screen casing or open hole completion usually.In drilling process, because the existence of positive pressure differential, drilling fluid can form one deck drilling fluid filter cake on the borehole wall.Drilling fluid filter cake comprises outer filter and interior filter cake, can result in blockage to formation pore, the prevention fluid from the stratum in well seepage flow.In order to eliminate the infringement of drilling fluid filter cake to oil reservoir, ordinary method is to use acid to dissolve the solubility in acid high-density weighting material in the drilling fluid filter cake and/or blocks up particle temporarily, or adopt oxidation to crack treatment solution polymericular weight is diminished, lose bridging and adhewsive action, thereby fine and close, tough and tensile drilling fluid filter cake are become loose, broken structure, make drilling fluid filter cake and solid phase be easy to be returned outside the discharge well, remove the obstruction of drilling fluid filter cake, recover the stratum production capacity the immediate vicinity of wellbore by fluid.These technology are to remove the effective ways of the drilling fluid filter cake obstruction of the horizontal well immediate vicinity of wellbore of adopting screen casing or open hole completion, but still come with some shortcomings:
1. not good enough to the crude oil washing/COW effect in the drilling fluid filter cake.In drilling fluid, sneak into the lubricity that crude oil improves drilling fluid in the drilling process through regular meeting.The tack of crude oil is strong, so can contain a certain amount of crude oil in the drilling fluid filter cake, strengthens the compactness of filter cake, also can adhere to a certain amount of crude oil on the screen casing wall simultaneously, reduces the earial drainage effect of screen casing.
2. existing drilling fluid filter cake treatment solution also is not very desirable to the broken glue effect of polymkeric substance.Particularly in broken glue process, most of gel breaker and polymkeric substance all produce floss, precipitation, easily cause the secondary injury.
3. existing drilling fluid filter cake treatment solution also need improve the corrosion rate of drilling fluid filter cake.Existing drilling fluid filter cake treatment solution is the highest by 23% to the corrosion rate of drilling fluid filter cake, and is minimum 3%, in organic positive colloid drilling fluid filter cake as native content height, solid phase corrosion rate variance, filter cake just are difficult for removing.
4. also need accelerate the polymkeric substance in drilling fluid filter cake treatment solution and the filter cake and the speed of response of solid matter.The treatment solution that has needs 8～10h to the broken glue of polymkeric substance, and the acid solution that has adopts recessive acid, and what produce at short notice is sour less, and influence is to the corrosion of solid phase.
5. the handling procedure that has is too complicated, has increased difficulty of construction and construction period.
6. existing drilling fluid filter cake treatment solution is that a kind of treatment solution is applicable to multiple drilling fluid mostly, and effect is not outstanding, and specific aim is not strong, easily causes the cost waste.
At present, the drilling fluid filter cake chemical treatment method under horizontal well screen casing, the open hole completion condition all has research at home and abroad, also widespread use.Propose to eliminate specific polymer damage as people such as external B.Beall in 1997, thereby the infringement of eliminating the drilling fluid filter cake generation effectively (is seen " external drilling technique " magazine, 1997,31 (6): the 47-54 page or leaf) with the enzymatic polymerization thing; And for example calendar year 2001 Petroleum Univ. (East China) and Shengli Oil Field king Fuhua, Ren Zhongqi etc. developed the oxidation treatment liquid of eliminating the mud solid phase infringement, treatment solution mainly contains strong oxidizer and acid (is seen " drilling fluid and well finishing liquid " magazine, 2001,18 (2): the 10-13 page or leaf; " oil drilling technology " magazine, 2003,31 (6): the 36-38 page or leaf); Rose the oil base drilling fluid filter cake technology that is applied under the horizontal well open hole completion condition of developing that waits in addition in 2005 before the Changjiang river university high mountain, filter cake removal liquid HCF is a kind of water external emulsion, aqueous phase contains mixing acid, cleans permeate agent, clay stabilizer, inhibiter, emulsifying agent, scale inhibitor, density adjuster KCl etc., this treatment solution requires drilling fluid to adopt Wingdale to increase the weight of (to see " drilling fluid and well finishing liquid " magazine, 2005,22 (3): the 32-33 page or leaf).
Summary of the invention
The purpose of this invention is to provide a kind of high solid phase drilling fluid filter cake removal treating fluid, the drilling fluid filter cake removal that is applied to the horizontal well immediate vicinity of wellbore of high solid phase drilling fluid drilling well, screen casing or open hole completion is handled.At high solid phase drilling fluid filter cake (clay content 〉=5%), clean brokenly glue, the broken glue of corrosion and back and clean phase in, increase substantially solid phase corrosion effect, and improve speed of response drilling fluid filter cake.Shorten construction period, reduce reagent cost.Overcome the deficiency that effect is not outstanding, specific aim is not strong of existing drilling fluid filter cake removal treating fluid,
The technical solution used in the present invention is: a kind of high solid phase drilling fluid filter cake removal treating fluid is provided, raising is to the corrosion rate of solid phase in the filter cake, have cleaning, broken glue function in addition, simplify operational procedure, reach the releasing filter cake, can more effectively dredge horizontal well immediate vicinity of wellbore reservoir seepage channel, the well production rate of improving the standard.
High solid phase drilling fluid filter cake removal treating fluid comprises three kinds of treatment solutions, promptly cleans breaking glue solution, corrosion breaking glue solution and back scavenging solution.
(1) cleaning that breaking glue solution mainly acts on is crude oil and the organic class dirt settling that cleans on filter cake and the screen casing wall.Cleaning breaking glue solution mainly is made up of stratum clean-out system, gel breaker, expansion-resisting agent and water, wherein: the stratum clean-out system comprises dimethylbenzene: (the HLB value is 5 for sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10) and 8-10 polyoxyethylenated alcohol.That gel breaker adopts is ammonium persulphate (NH4) 2S2O8.What expansion-resisting agent adopted is potassium chloride (KCl).
Cleaning each ingredients weight parts of breaking glue solution is: dimethylbenzene: 2～4 parts; Sherwood oil: 1～3 part; Polyoxyethylene nonylphenol ether (the HLB value is 5, model OP-4): 0.1～0.5 part; Polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10): 0.1～0.5 part; 8-10 polyoxyethylenated alcohol: 0.1～0.5 part; Ammonium persulphate (NH4) 2S2O8:1～5 parts; Potassium chloride (KCl): 1～5 part; Water: 80～95 parts.
The compound method of cleaning breaking glue solution is as follows:
1. at first prepare stratum clean-out system (A): (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), (the HLB value is 13 to polyoxyethylene nonylphenol ether, model OP-10) and the 8-10 polyoxyethylenated alcohol be mixed in proportion and stir, make the stratum clean-out system.The stratum clean-out system of being prepared (A) is to use in cleaning breaking glue solution.
2. preparation cleaning breaking glue solution: Xiang Shuizhong adds ammonium persulphate (NH respectively
4)
2S
2O
8(gel breaker) and potassium chloride (KCl) (expansion-resisting agent) add stratum clean-out system (A) after stirring is fully dissolved it again, fully stir into the oyster white uniform liquid, promptly are mixed with the cleaning breaking glue solution.
The molecular formula of dimethylbenzene is C
8H
10, claim xylol again, be the mixture of p-Xylol, o-Xylol, m-xylene and ethylbenzene.Colourless transparent liquid, 135～145 ℃ of boiling points, relative density 0.840～0.870.As solvent, play cleanup action.Market has dimethylbenzene to sell.
The another name of sherwood oil is a petroleum spirit, and composition is pentane, hexane, and colourless transparent liquid has the kerosene smell, and vapour pressure 53.32kPa/20 ℃, flash-point: less than-20 ℃, fusing point is less than-73 ℃, boiling point: 40～80 ℃.As solvent, play cleanup action.Market has sherwood oil to sell.
Polyoxyethylene nonylphenol ether (the HLB value is 5, model OP-4) comprises Nonyl pheno (15) ether, Nonyl pheno (10) ether; Be colourless transparent liquid, soluble in water, pH value (5% water liquid) is 6～8, and the HLB value is 5, has emulsifying property.There is production marketing in Tianjin fine chemistry preparation factory, and another name: emulsifying agent NP-4, NPE-4, product type is: OP-4.
Polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10) is a colourless oil liquid, is soluble in oil and other solvents.PH value (5% water liquid) is 6～8, and the HLB value is 13.3, has emulsifying property.There is production marketing in Tianjin fine chemistry preparation factory, and another name: emulsifying agent NP-10, NPE-10, OPE-10, product type is: OP-10.
The 8-10 polyoxyethylenated alcohol is a kind of permeate agent, another name JFC, and molecular formula is RO (CH
2CH
2O) nH, the n in the formula are 8-10, and R is C
12, Fatty Alcohol(C12-C14 and C12-C18) wherein is a single fat alcohol.Colourless transparent liquid, pH value (5% water liquid) is 6～8, and is soluble in water.Have emulsification, wettability.There is production marketing in Tianjin fine chemistry preparation factory, and product type is: JFC.
(2) mainly to act on be the clay of dissolving in the drilling fluid filter cake, drilling cuttings and stifled particle etc. temporarily to the corrosion breaking glue solution.The corrosion breaking glue solution mainly is made up of acid solution, inhibiter and Fe stabilizer.Wherein acid solution comprises acetic acid, hydrochloric acid, hydrofluoric acid and water.Inhibiter adopts inhibiter SA1-3.Fe stabilizer adopts ammonium citrate.
Each ingredients weight parts of corrosion breaking glue solution is: acetic acid: 3～8 parts; Hydrochloric acid: 8～13 parts; Hydrofluoric acid: 1～3 part; Inhibiter SA1-3:1～3 part; Ammonium citrate: 0.3～0.8 part; Water: 70～86 parts.
The compound method of corrosion breaking glue solution is as follows:
Xiang Shuizhong adds acetic acid, hydrochloric acid and hydrofluoric acid in proportion, adds inhibiter SA1-3 after stirring in proportion, adds ammonium citrate in proportion after restir is even, stirs and promptly is mixed with the corrosion breaking glue solution.
Ammonium citrate, another name Citric Acid three ammoniums, Triammonium citrate, Diammonium citrate, molecular formula is C
6H
17N
3O
7, molecular weight is 243.22.White powder has deliquescence, and is water-soluble and sour, is insoluble to ethanol, ether and acetone.Being heated to fusing point promptly decomposes.
Inhibiter SA1-3 is the compound of multiple organic compound, and the Chengdu peace is real that there are products production and sale in petroleum science and technology development corporation, Ltd..This inhibiter can replace with other acidification corrosion inhibitor products according to the formation temperature of using, as long as with other additive compatibility in the corrosion breaking glue solution and under the formation temperature of using, the erosion rate of corrosion breaking glue solution satisfies customer requirements and gets final product, and produces and the HW-10S acidification corrosion inhibitor of sale or the WD22-301 type acidification corrosion inhibitor that Xian Wonder Chemical Co., Ltd. produces and sells such as Zibo City, Shandong Province Huantai County's two-edged auxiliary reagent factory.
Inhibiter SA1-3, WD22-301 type acidification corrosion inhibitor, HW-10S acidification corrosion inhibitor
(3) mainly to act on be the resistates that replaces out behind cleaning breaking glue solution, corrosion breaking glue solution and the filter cake removal to the back scavenging solution.Back scavenging solution mainly is made up of stratum clean-out system, expansion-resisting agent and water.That expansion-resisting agent adopts is Repone K (KCl).
Each ingredients weight parts of back scavenging solution is: dimethylbenzene: 2～4 parts; Sherwood oil: 1～3 part; Polyoxyethylene nonylphenol ether (the HLB value is 5, model OP-4): 0.1～0.5 part; Polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10): 0.1～0.5 part; 8-10 polyoxyethylenated alcohol: 0.1～0.5 part; 1～5 part in Repone K (KCl); Water: 90～95 parts.
1. at first prepare stratum clean-out system (B): (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), (the HLB value is 13 to polyoxyethylene nonylphenol ether, model OP-10) and the 8-10 polyoxyethylenated alcohol be mixed in proportion and stir, make stratum clean-out system (B).The stratum clean-out system of being prepared (B) uses in the scavenging solution of back.
2. prepare the back scavenging solution:
Xiang Shuizhong adds Repone K (expansion-resisting agent), adds stratum clean-out system (B) again after stirring is fully dissolved it, fully stirs into the oyster white uniform liquid, promptly is mixed with the back scavenging solution.
Clean the using method of breaking glue solution, corrosion breaking glue solution and back scavenging solution:
(1) prepares 3% Repone K salt solution in the well site; Be ready to clean breaking glue solution, corrosion breaking glue solution and back scavenging solution.The field technician can finish the brinish preparation.
(2) replace out drilling fluid in the well with 3% Repone K salt solution.
(3) pump into the cleaning breaking glue solution.Pump into the volume that cleans breaking glue solution and be productive section pit shaft internal volume and greater than borehole wall 100mm annular stratum void volume sum.Clean the use volume of breaking glue solution, i.e. productive section pit shaft internal volume and greater than borehole wall 100mm annular stratum void volume sum, those skilled in the art can calculate.
(4) pump into salt solution, will clean breaking glue solution and replace to the productive section tip position.
(5) close well head outlet gate, pump into and the salt solution of productive section greater than borehole wall 100mm annular stratum void volume sum equivalent.Closing well reaction 30min.
(6) open well head and go out port strobe, pump into the corrosion breaking glue solution.The amount of pumping into is identical with the cleaning breaking glue solution.
(7) with salt solution the corrosion breaking glue solution is replaced to the productive section tip position.
(8) close well head outlet gate, pump into and the salt solution of productive section greater than borehole wall 100mm annular stratum void volume sum equivalent.Closing well reaction 60min.
(9) open well head and go out port strobe, replace, replace into back scavenging solution volume identical with the cleaning breaking glue solution into the back scavenging solution.
(10) show neutral with salt solution well-flushing to the body pH of well head returning fluid value at last.Finish the high solid phase drilling fluid filter cake removal construction.
Beneficial effect of the present invention: preferred, composite by multiple treatment agent, developed high solid phase drilling fluid filter cake removal treating fluid.Treatment solution of the present invention is at high solid phase drilling fluid filter cake, clean the phase in releasing by cleaning brokenly glue, the broken glue of corrosion and back, corrosion rate to solid phase in the filter cake increases substantially, wherein the corrosion rate to organic positive colloid drilling fluid filter cake has improved 3.5 times than existing treatment agent, clean simultaneously, broken glue rate is higher, speed of response is faster, the engineering time is shorter, operational procedure is simpler, reagent cost is lower, the filter cake removal better effects if, can more effectively dredge the immediate vicinity of wellbore reservoir seepage channel of horizontal well, the well production rate of improving the standard.
On-the-spot result on trial shows, site operation success ratio 100%, and the back production fluid amount abundance that brings in, output has met or exceeded joins the product level.Can be correlated the go into operation every meter fluid productivity index comparison at initial stage of 4 mouthfuls of test pits on average improve 175% than well, show that the immediate vicinity of wellbore drilling fluid filter cake is effectively removed, reservoir ooze good fluidity, liquid-flow is unobstructed.Reagent cost on average reduces by 15% simultaneously.
Embodiment
Embodiment 1:
Be 215.9mm, finishing drilling well depth 2211m in a bite borehole diameter, to need the productive zone thickness of filter cake removal be that 197m, formation porosity are that to implement the filter cake removal operation in 34.69% the well be example, be elaborated.
The preparation high solid phase drilling fluid filter cake removal treating fluid disposes respectively by cleaning breaking glue solution, corrosion breaking glue solution and three kinds of treatment solutions of back scavenging solution.
(1) breaking glue solution 15t is cleaned in preparation, by weight.
1. at first prepare stratum clean-out system (A), (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10) and 8-10 polyoxyethylenated alcohol were by 2.2: 1: 0.3: 0.3: 0.2 weight part ratio mixing and stirring.Stratum clean-out system (A) is 4 parts in cleaning breaking glue solution.
2. breaking glue solution is cleaned in preparation
In 91 parts of water, add 3 parts of (NH respectively
4)
2S
2O
8(gel breaker) and 2 parts of KCl (expansion-resisting agent) stir and to add 4 parts of the stratum clean-out systems (A) that prepare after it is fully dissolved again, fully stir into the oyster white uniform liquid, promptly are mixed with the cleaning breaking glue solution.
(2) preparation corrosion breaking glue solution 15t, by weight.
By weight, in 56 parts of water, add 5 parts of acetic acid, back adding 31 parts of technical hydrochloric acids (concentration of hydrochloric acid 36%) stir, restir evenly back adds 5.5 parts of hydrofluoric acid, add 2 parts of inhibiter SA1-3 after stirring again, add 0.5 part of ammonium citrate after stirring again, promptly be mixed with the corrosion breaking glue solution.
(3) preparation back scavenging solution 15t, by weight.
1. at first prepare stratum clean-out system (B), (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10) and 8-10 polyoxyethylenated alcohol were by 2.2: 1: 0.3: 0.3: 0.2 weight part ratio mixing and stirring.Stratum clean-out system (B) is 4 parts in cleaning breaking glue solution.
2. preparation back scavenging solution by weight, adds 2 parts of KCl (expansion-resisting agent) in 94 parts of water, adds 4 parts of stratum clean-out systems (B) again after stirring is fully dissolved it, fully stirs into the oyster white uniform liquid, promptly is mixed with the back scavenging solution.
It is to be noted that the quantity of cleaning breaking glue solution, corrosion breaking glue solution and back scavenging solution preparation is that well size, productive section length and formation porosity according to every mouthful of well calculates.Clean the weight and corrosion breaking glue solution, identical of breaking glue solution with the weight of back scavenging solution.
The using method of high solid phase drilling fluid filter cake removal treating fluid:
(1) prepares concentration (weight ratio) 3% Repone K salt solution in the well site; Be ready to clean breaking glue solution, corrosion breaking glue solution and back scavenging solution.The field technician can finish the brinish preparation.
(2) go out drilling fluid in the well with brine displacement.
(3) pump into whole cleaning breaking glue solutions.
(4) pump into salt solution, will clean breaking glue solution and replace to the productive section tip position.
(5) close well head outlet gate, pump into salt solution 7t.Closing well reaction 30min.
(6) open well head and go out port strobe, pump into whole corrosion breaking glue solutions.
(7) with salt solution the corrosion breaking glue solution is replaced to the productive section tip position.
(8) close well head outlet gate, pump into salt solution 7t.Closing well reaction 60min.
(9) open well head and go out port strobe, pump into whole backs scavenging solution.
(10) show neutral with salt solution well-flushing to the body pH of well head returning fluid value at last.Finish the high solid phase drilling fluid filter cake removal construction.
On-the-spot result of use data analysis: crude oil washing/COW rate 99%; The broken glue rate 87% of big potassium; 60 ℃ of dynamic erosion rate 0.3595g/m
2.h; Anti-swollen rate is 97%; Interfacial tension is 1.47mN/m; The iron ion stabilizing power is 15mg/mL; Reagent cost on average reduces by 15%.Site operation is succeedd, day at operation initial stage production fluid 35m
3, day produce oil 25t, what surpassed day produce oil 20t joins the product requirement, shows that implementation result is good.
Embodiment 2:
Be 277.5mm, finishing drilling well depth 1510m in a bite borehole diameter, to need the productive zone thickness of filter cake removal be that 291.6m, formation porosity are that to implement the filter cake removal operation in 31% the well be example, be elaborated.
The preparation high solid phase drilling fluid filter cake removal treating fluid disposes respectively by cleaning breaking glue solution, corrosion breaking glue solution and three kinds of treatment solutions of back scavenging solution.
(1) breaking glue solution 30t is cleaned in preparation, by weight.
1. at first prepare stratum clean-out system (A), (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10) and 8-10 polyoxyethylenated alcohol were by 2.5: 1: 0.5: 0.5: 0.5 weight part ratio mixing and stirring.Stratum clean-out system (A) is 5 parts in cleaning breaking glue solution.
2. breaking glue solution is cleaned in preparation
In 88 parts of water, add 4 parts of (NH respectively
4)
2S
2O
8(gel breaker) and 3 parts of KCl (expansion-resisting agent) stir and to add 4 parts of the stratum clean-out systems (A) that prepare after it is fully dissolved again, fully stir into the oyster white uniform liquid, promptly are mixed with the cleaning breaking glue solution.
(2) preparation corrosion breaking glue solution 30t, by weight.
By weight, in 57 parts of water, add 5 parts of acetic acid, back adding 30 parts of technical hydrochloric acids (concentration of hydrochloric acid 36%) stir, restir evenly back adds 5 parts of hydrofluoric acid, add 2 parts of HW-10S acidification corrosion inhibitors after stirring again, add 1 part of ammonium citrate after stirring again, promptly be mixed with the corrosion breaking glue solution.
(3) preparation back scavenging solution 30t, by weight.
1. at first prepare stratum clean-out system (B), (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10) and 8-10 polyoxyethylenated alcohol were by 2.5: 1: 0.5: 0.5: 0.5 weight part ratio mixing and stirring.Stratum clean-out system (B) is 5 parts in cleaning breaking glue solution.
2. preparation back scavenging solution by weight, adds 2 parts of KCl (expansion-resisting agent) in 93 parts of water, adds 5 parts of stratum clean-out systems (B) again after stirring is fully dissolved it, fully stirs into the oyster white uniform liquid, promptly is mixed with the back scavenging solution.
Clean the using method of breaking glue solution, corrosion breaking glue solution and back scavenging solution:
(1) prepares concentration (weight ratio) 3% Repone K salt solution in the well site; Be ready to clean breaking glue solution, corrosion breaking glue solution and back scavenging solution.The field technician can finish the brinish preparation.
(2) go out drilling fluid in the well with brine displacement.
(3) pump into whole cleaning breaking glue solutions.
(4) pump into salt solution, will clean breaking glue solution and replace to the productive section tip position.
(5) close well head outlet gate, pump into salt solution 11t.Closing well reaction 30min.
(6) open well head and go out port strobe, pump into whole corrosion breaking glue solutions.
(7) with salt solution the corrosion breaking glue solution is replaced to the productive section tip position.
(8) close well head outlet gate, pump into salt solution 11t.Closing well reaction 60min.
(9) open well head and go out port strobe, pump into whole backs scavenging solution.
(10) show neutral with salt solution well-flushing to the body pH of well head returning fluid value at last.Finish the high solid phase drilling fluid filter cake removal construction.
Field conduct is succeedd, day at operation initial stage production fluid 54m
3, day produce oil 29t, what surpassed day produce oil 20t joins the product requirement.Its meter fluid productivity index is 0.1078m
3/ d.MPa.m is 4 times of contrast well rice fluid productivity index, and the drilling fluid filter cake that shows the immediate vicinity of wellbore stops up effectively to be removed, and the stratum filtration performance is better.
Embodiment 3:
Be 277.5mm, finishing drilling well depth 1418m in a bite borehole diameter, to need the productive zone thickness of filter cake removal be that 100m, formation porosity are that to implement the filter cake removal operation in 31% the well be example, be elaborated.
The preparation high solid phase drilling fluid filter cake removal treating fluid disposes respectively by cleaning breaking glue solution, corrosion breaking glue solution and three kinds of treatment solutions of back scavenging solution.
(1) breaking glue solution 10t is cleaned in preparation, by weight.
1. at first prepare stratum clean-out system (A), (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10) and 8-10 polyoxyethylenated alcohol were by 2.5: 1: 0.5: 0.5: 0.5 weight part ratio mixing and stirring.Stratum clean-out system (A) is 5 parts in cleaning breaking glue solution.
2. breaking glue solution is cleaned in preparation
In 88 parts of water, add 4 parts of (NH respectively
4)
2S
2O
8(gel breaker) and 3 parts of KCl (expansion-resisting agent) stir and to add 4 parts of the stratum clean-out systems (A) that prepare after it is fully dissolved again, fully stir into the oyster white uniform liquid, promptly are mixed with the cleaning breaking glue solution.
(2) preparation corrosion breaking glue solution 10t, by weight.
By weight, in 57 parts of water, add 5 parts of acetic acid, back adding 30 parts of technical hydrochloric acids (hydrochloric acid weight ratio concentration 36%) stir, restir evenly back adds 5 parts of hydrofluoric acid, add 2 parts of WD22-301 type acidification corrosion inhibitors after stirring again, add 1 part of ammonium citrate after stirring again, promptly be mixed with the corrosion breaking glue solution.
(3) preparation back scavenging solution 10t, by weight.
1. at first prepare stratum clean-out system (B), (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10) and 8-10 polyoxyethylenated alcohol were by 2.5: 1: 0.5: 0.5: 0.5 weight part ratio mixing and stirring.Stratum clean-out system (B) is 5 parts in cleaning breaking glue solution.
2. preparation back scavenging solution by weight, adds 2 parts of KCl (expansion-resisting agent) in 93 parts of water, adds 5 parts of stratum clean-out systems (B) again after stirring is fully dissolved it, fully stirs into the oyster white uniform liquid, promptly is mixed with the back scavenging solution.
Clean the using method of breaking glue solution, corrosion breaking glue solution and back scavenging solution:
(1) prepares concentration (weight ratio) 3% Repone K salt solution in the well site; Be ready to clean breaking glue solution, corrosion breaking glue solution and back scavenging solution.The field technician can finish the brinish preparation.
(2) go out drilling fluid in the well with brine displacement.
(3) pump into whole cleaning breaking glue solutions.
(4) pump into salt solution, will clean breaking glue solution and replace to the productive section tip position.
(5) close well head outlet gate, pump into salt solution 4t.Closing well reaction 30min.
(6) open well head and go out port strobe, pump into whole corrosion breaking glue solutions.
(7) with salt solution the corrosion breaking glue solution is replaced to the productive section tip position.
(8) close well head outlet gate, pump into salt solution 4t.Closing well reaction 60min.
(9) open well head and go out port strobe, pump into whole backs scavenging solution.
(10) show neutral with salt solution well-flushing to the body pH of well head returning fluid value at last.Finish the high solid phase drilling fluid filter cake removal construction.
Field conduct is succeedd, day at operation initial stage production fluid 33m
3, its meter fluid productivity index is 0.03596m
3/ d.MPa.m compares highlyer by 33% than well rice fluid productivity index, and the drilling fluid filter cake that shows the immediate vicinity of wellbore stops up effectively to be removed, and the stratum filtration performance is better.
Embodiment 4:
Be 248.3mm, finishing drilling well depth 1728m in a bite borehole diameter, to need the productive zone thickness of filter cake removal be that 190m, formation porosity are that to implement the filter cake removal operation in 33% the well be example, be elaborated.
The preparation high solid phase drilling fluid filter cake removal treating fluid disposes respectively by cleaning breaking glue solution, corrosion breaking glue solution and three kinds of treatment solutions of back scavenging solution.
(1) breaking glue solution 20t is cleaned in preparation, by weight.
1. at first prepare stratum clean-out system (A), (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10) and 8-10 polyoxyethylenated alcohol were by 2.2: 1: 0.3: 0.3: 0.2 weight part ratio mixing and stirring.Stratum clean-out system (A) is 4 parts in cleaning breaking glue solution.
2. breaking glue solution is cleaned in preparation
In 91 parts of water, add 3 parts of (NH respectively
4)
2S
2O
8(gel breaker) and 2 parts of KCl (expansion-resisting agent) stir and to add 4 parts of the stratum clean-out systems (A) that prepare after it is fully dissolved again, fully stir into the oyster white uniform liquid, promptly are mixed with the cleaning breaking glue solution.
(2) preparation corrosion breaking glue solution 20t, by weight.
By weight, in 56 parts of water, add 5 parts of acetic acid, back adding 31 parts of technical hydrochloric acids (hydrochloric acid weight ratio concentration 36%) stir, restir evenly back adds 5.5 parts of hydrofluoric acid, add 2 parts of inhibiter SA1-3 after stirring again, add 0.5 part of ammonium citrate after stirring again, promptly be mixed with the corrosion breaking glue solution.
(3) preparation back scavenging solution 20t, by weight.
1. at first prepare stratum clean-out system (B), (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10) and 8-10 polyoxyethylenated alcohol were by 2.2: 1: 0.3: 0.3: 0.2 weight part ratio mixing and stirring.Stratum clean-out system (B) is 4 parts in cleaning breaking glue solution.
2. preparation back scavenging solution by weight, adds 2 parts of KCl (expansion-resisting agent) in 94 parts of water, adds 4 parts of stratum clean-out systems (B) again after stirring is fully dissolved it, fully stirs into the oyster white uniform liquid, promptly is mixed with the back scavenging solution.
It is to be noted that the quantity of cleaning breaking glue solution, corrosion breaking glue solution and back scavenging solution preparation is that well size, productive section length and formation porosity according to every mouthful of well calculates.Clean the weight and corrosion breaking glue solution, identical of breaking glue solution with the weight of back scavenging solution.
Clean the using method of breaking glue solution, corrosion breaking glue solution and back scavenging solution:
(1) prepares concentration (weight ratio) 3% Repone K salt solution in the well site; Be ready to clean breaking glue solution, corrosion breaking glue solution and back scavenging solution.The field technician can finish the brinish preparation.
(2) go out drilling fluid in the well with brine displacement.
(3) pump into whole cleaning breaking glue solutions.
(4) pump into salt solution, will clean breaking glue solution and replace to the productive section tip position.
(5) close well head outlet gate, pump into salt solution 10t.Closing well reaction 30min.
(6) open well head and go out port strobe, pump into whole corrosion breaking glue solutions.
(7) with salt solution the corrosion breaking glue solution is replaced to the productive section tip position.
(8) close well head outlet gate, pump into salt solution 10t.Closing well reaction 60min.
(9) open well head and go out port strobe, pump into whole backs scavenging solution.
(10) show neutral with salt solution well-flushing to the body pH of well head returning fluid value at last.Finish the high solid phase drilling fluid filter cake removal construction.
The site operation success, its meter fluid productivity index is 0.1097m
3/ d.MPa.m is 4.4 times of contrast well rice fluid productivity index, and the drilling fluid filter cake that shows the immediate vicinity of wellbore stops up and obtains removing, and the stratum filtration performance is better.
Claims (4)
1, a kind of high solid phase drilling fluid filter cake removal treating fluid is characterized in that: comprises three kinds of treatment solutions, promptly cleans breaking glue solution, corrosion breaking glue solution and back scavenging solution,
Cleaning each ingredients weight parts of breaking glue solution is: dimethylbenzene: 2～4 parts; Sherwood oil: 1～3 part; Polyoxyethylene nonylphenol ether (the HLB value is 5, model OP-4): 0.1～0.5 part; Polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10): 0.1～0.5 part; 8-10 polyoxyethylenated alcohol: 0.1～0.5 part; Ammonium persulphate (NH4) 2S2O8:1～5 parts; Potassium chloride (KCl): 1～5 part; Water: 80～95 parts;
Each ingredients weight parts of corrosion breaking glue solution is: acetic acid: 3～8 parts; Hydrochloric acid: 8～13 parts; Hydrofluoric acid: 1～3 part; Inhibiter: 1～3 part; Ammonium citrate: 0.3～0.8 part; Water: 70～86 parts;
Each ingredients weight parts of back scavenging solution is: dimethylbenzene: 2～4 parts; Sherwood oil: 1～3 part; Polyoxyethylene nonylphenol ether (the HLB value is 5, model OP-4): 0.1～0.5 part; Polyoxyethylene nonylphenol ether (the HLB value is 13, model OP-10): 0.1～0.5 part; 8-10 polyoxyethylenated alcohol: 0.1～0.5 part; 1～5 part in Repone K (KCl); Water: 90～95 parts.
2, high solid phase drilling fluid filter cake removal treating fluid as claimed in claim 1 is characterised in that: described inhibiter is inhibiter SA1-3, WD22-301 type acidification corrosion inhibitor or HW-10S acidification corrosion inhibitor.
3, high solid phase drilling fluid filter cake removal treating fluid as claimed in claim 1, its preparation method is characterised in that:
Clean the preparation of breaking glue solution:
1. at first prepare stratum clean-out system (A): (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), (the HLB value is 13 to polyoxyethylene nonylphenol ether, model OP-10) and the 8-10 polyoxyethylenated alcohol be mixed in proportion and stir, make stratum clean-out system (A);
2. preparation cleaning breaking glue solution: Xiang Shuizhong adds ammonium persulphate (NH respectively
4)
2S
2O
8(gel breaker) and potassium chloride (KCl) (expansion-resisting agent) add stratum clean-out system (A) after stirring is fully dissolved it again, fully stir into the oyster white uniform liquid, promptly are mixed with the cleaning breaking glue solution;
The preparation of corrosion breaking glue solution:
Xiang Shuizhong adds acetic acid, hydrochloric acid and hydrofluoric acid in proportion, adds inhibiter after stirring in proportion, adds ammonium citrate in proportion after restir is even, stirs and promptly is mixed with the corrosion breaking glue solution;
The preparation of preparation back scavenging solution:
1. at first prepare stratum clean-out system (B): (the HLB value is 5 with dimethylbenzene, sherwood oil, polyoxyethylene nonylphenol ether, model OP-4), (the HLB value is 13 to polyoxyethylene nonylphenol ether, model OP-10) and the 8-10 polyoxyethylenated alcohol be mixed in proportion and stir, make stratum clean-out system (B);
2. prepare the back scavenging solution:
Xiang Shuizhong adds Repone K (expansion-resisting agent), adds stratum clean-out system (B) again after stirring is fully dissolved it, fully stirs into the oyster white uniform liquid, promptly is mixed with the back scavenging solution.
4, high solid phase drilling fluid filter cake removal treating fluid as claimed in claim 1, its using method is characterised in that:
(1) prepares 3% Repone K salt solution in the well site; Be ready to clean breaking glue solution, corrosion breaking glue solution and back scavenging solution;
(2) go out drilling fluid in the well with brine displacement;
(3) pump into whole cleaning breaking glue solutions;
(4) pump into salt solution, will clean breaking glue solution and replace to the productive section tip position;
(5) close well head outlet gate, continue to pump into salt solution, continue to pump into the salt water yield payzone section of making a living and be not less than volume of voids in the 100mm annular stratum, closing well reacts 30min;
(6) open well head and go out port strobe, pump into whole corrosion breaking glue solutions;
(7) with salt solution the corrosion breaking glue solution is replaced to the productive section tip position;
(8) close well head outlet gate, continue to pump into salt solution, continue to pump into the salt water yield payzone section of making a living and be not less than volume of voids in the 100mm annular stratum, closing well reacts 60min;
(9) open well head and go out port strobe, pump into whole backs scavenging solution;
(10) show neutral with salt solution well-flushing to the body pH of well head returning fluid value at last, finish the high solid phase drilling fluid filter cake removal construction.
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