CN105086965A - Oil-based drilling fluid for high-temperature formations and preparation method and application thereof - Google Patents
Oil-based drilling fluid for high-temperature formations and preparation method and application thereof Download PDFInfo
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- CN105086965A CN105086965A CN201410202296.5A CN201410202296A CN105086965A CN 105086965 A CN105086965 A CN 105086965A CN 201410202296 A CN201410202296 A CN 201410202296A CN 105086965 A CN105086965 A CN 105086965A
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Abstract
The present invention relates to an oil-based drilling fluid for high-temperature formations and a preparation method and application thereof, and mainly aims to solve the problems of well leakage, well-wall collapsing and jamming of a drilling tool in the drilling process of low-pressure and water sensitive reservoirs of the high-temperature formations in the prior art. The oil-based drilling fluid for the high-temperature formations comprises the following components by weight: (1) 90 parts of a base oil; (2) 1 to 8 parts of a foaming agent; and (3) 1-8 parts of a foam stabilizer; wherein the foaming agent molecular general formula is as follows: R1-O-(C3H6O) z-R2, wherein R1 and R2 are each independently selected from any of C1-C20 aliphatic groups and aryl groups, and z is 20 to 100; the foam stabilizer is oil-soluble fluorine and / or a silicone surfactant, by the technical scheme, stable low density at high temperature can be achieved, mud shale hydration expansion inhibition and good reservoir protection effects can be played, the problem is well solved, and the oil-based drilling fluid can be applied to drilling operation of high-temperature low-pressure formations.
Description
Technical field
The present invention relates to a kind of oil base drilling fluid for high-temperature stratum and its preparation method and application.
Background technology
At present, for the condition of Different Strata, develop dissimilar drilling fluid.Wherein, foam drilling fluid due to foam density little, there is stronger removing and cutting carring ability, be applied to drilling process can improve rate of penetration, effectively control formation leakage, reduce pressure differential sticking number of times, reduce the advantage such as drill bit consumption and power demand, for probing and the exploitation of low pressure reservoir, it is optimal drilling fluid.But foam drilling fluid conventional is at present as patent CN200410021014.8, CN200410013232.7, CN200710113558.0, 201210310014.4 and CN201010565685.6 etc. is using aqueous phase as continuum, rely on the effect of whipping agent, by with air, nitrogen, Sweet natural gas or waste gas mixing reduce foam or the microvesicle of density formation, because base fluid density is high, the reduction degree of system density is subject to the restriction of objective condition, particularly in some low pressure deep-well areas, drilling fluid stability is subject to larger impact, and easily cause shale hydration to expand in the low pressure reservoir that water sensitivity is strong, limit the application of this technology.
Oil-based foam drilling technique is emerging drilling technique, can in the strong stratum application of ultralow pressure, high temperature, deep-well and water sensitivity.The drilling well of development oil-based foam, effectively can solve the challenge such as leakage, slump in, bit freezing due to Mud Shale Hydration initiation that conventional water-based foam drilling well runs into, significant to reservoir protection, is the very potential boring method of one.But the thermostability of oil-based foam is the main bugbear that this drilling fluid system current faces.
Patent AU2006202080A1 discloses a kind of low-density oil-based foam drilling fluid system, but the half foam life period formed in the document only has 10 minutes, is difficult to the demand meeting drilling technology.Patent CN201210150219.0 also discloses a kind of low density oil base drilling well system, but due to whipping agent used be sorbitan fatty acid ester, there is the limitation of use temperature, therefore be difficult to the demand meeting high-temperature drilling technique.
Summary of the invention
One of technical problem to be solved by this invention is the challenge such as leakage, slump in, bit freezing existed in existing high-temperature low-pressure and sensitive reservoir drilling process, provides a kind of new fire resistant low-density oil base drilling fluid.This drilling fluid have high temperature resistant, density is low, suppress hydration of mud stone to expand and the advantage of good reservoir protection effect, can be applicable to the operation of high-temperature low-pressure strata drilling.
Two preparation methods of the oil base drilling fluid for high-temperature stratum for one of to solve the problems of the technologies described above of technical problem to be solved by this invention.
Three application of the oil base drilling fluid for high-temperature stratum in oil drilling for one of to solve the problems of the technologies described above of technical problem to be solved by this invention.
For one of solving the problems of the technologies described above, the technical solution used in the present invention is as follows: for the oil base drilling fluid of high-temperature stratum, comprises following component with weight parts:
The base oil of (1) 90 part;
The whipping agent of (2) 1 ~ 8 parts;
The suds-stabilizing agent of (3) 1 ~ 8 parts;
Wherein, the general molecular formula of whipping agent is: R
1-O-(C
3h
6o)
z-R
2, wherein, R
1and R
2all independently be selected from C
1-C
20fatty group, any one in aryl, z=20-100; Suds-stabilizing agent is that oil-soluble fluorine is or/and Silicon surfactant.
In technique scheme, described suds-stabilizing agent is preferably molecule and is made up of following formula (1) and (2) two kinds of structural units:
Wherein, R
3and R
4all independent preferred from H or C
1-C
4alkyl, be more preferably H or methyl; R' is preferably selected from C
1-C
20f replace fatty group or aromatic base, more preferably from C
8-C
18f replace saturated fatty base or aromatic base, more preferably C
8-C
18f replace saturated fatty alkyl or aryl radical, be further preferably C
8-C
18f replace alkyl, the ratio of F and H is preferably 0≤a/ (a+b) < 1, more preferably 0≤a/ (a+b)≤0.8, further preferred 0≤a/ (a+b)≤0.5, a is the atom number of H in R', and b is the atom number of F in R'; R'' is preferably from C
1-C
40fatty group or aromatic base, be more preferably C
10-C
18saturated fatty base or aromatic base, more preferably C
10-C
18saturated fatty alkyl or aryl radical, be further preferably C
10-C
18alkyl.
In technique scheme, described base oil is preferably hydrocarbon or/and ester, and as being the petroleum oil commonly used of this area or its cut, vegetables oil, the organic liquid of various synthesis or its mixture, further preferred version is mineral oil and/or diesel oil; Be more preferably at least one in 0# diesel oil, 3# white oil, 5# white oil, 7# white oil, whiteruss.
In technique scheme, described R
1preferably from C
8-C
16fatty group, any one in aryl, be more preferably C
8-C
16aliphatic group, more preferably C
8-C
16saturated fatty base, be further preferably C
8-C
16alkyl; R
2preferably from C
1-C
16fatty group, any one in aryl, be more preferably C
1-C
16aliphatic group, more preferably C
1-C
16saturated fatty alkyl, be further preferably C
1-C
16alkyl; Preferred z=30-60.
In technique scheme, described oil base drilling fluid preferably adds 0-10 part tackifier, be more preferably 0-2 part, tackifier do not have particular requirement, the tackifier that can be used for oil base drilling fluid well-known to those skilled in the art all may be used for the present invention, such as oil-soluble macromolecular compound, as conventional cis-1,4-polybutadiene rubber, ethylene-propylene rubber(EPR), the molecular weight of cis-1,4-polybutadiene rubber, ethylene-propylene rubber(EPR) is preferably number-average molecular weight 1 ~ 1,000 ten thousand, is more preferably number-average molecular weight 1 ~ 1,000,000.
For solve the problems of the technologies described above two, the technical solution used in the present invention is as follows: for the preparation method of the oil base drilling fluid of high-temperature stratum, comprise the following steps:
(1) by R
1-OH and propylene oxide join in reactor, and under the existence of propoxylated Catalyst, temperature of reaction is 30-150 DEG C, and reaction 2-20 hour, then adds R
2-Cl, continue reaction 3-15 hour, obtaining general formula through process after reaction terminates is R
1-O-(C
3h
6o)
z-R
2whipping agent;
(2) by monomer C
2h
2r
3cOOR' and C
2h
2r
4cOOR'' joins in reactor, to account for the total quality of above-mentioned two kinds of monomers, add the oil-soluble initiator of 0.1%-2%, temperature of reaction is 50-120 DEG C, reaction 3-12 hour, obtains the suds-stabilizing agent be made up of described molecular structure unit through process after reaction terminates;
(3) by described component number, suds-stabilizing agent synthesized in whipping agent synthesized in base oil, (1), (2) is mixed, obtained described oil base drilling fluid.
In technique scheme, described propoxylated Catalyst can be catalyzer well-known to those skilled in the art, as basic catalyst, is preferably potassium hydroxide; Oil-soluble initiator can be any oil-soluble initiator of field of polymer technology well-known to those skilled in the art in order to radical polymerization, is preferably at least one in AIBN, benzoyl peroxide.
For solve the problems of the technologies described above three, the technical solution used in the present invention is as follows: for the application of oil base drilling fluid in oil drilling of high-temperature stratum.
In technique scheme, described high-temperature stratum temperature is preferably 80-200 DEG C.
In technique scheme, before the application in oil drilling of the oil base drilling fluid of high-temperature stratum, technique means well known to those skilled in the art can be adopted, as sheared formation foam in atmosphere.
In technique scheme, described in the oil base drilling fluid of high-temperature stratum, other auxiliary agents well-known to those skilled in the art can also be added, as fluid loss agent etc.
Fire resistant low-density oil base drilling fluid of the present invention, by adopting oil as base fluid, has very strong inhibition, is applied to oil layer protection Be very effective in high-temperature low-pressure and sensitive reservoir drilling process; The foam system of the whipping agent selected and suds-stabilizing agent composition can reduce oil/air surface tension force, be conducive to the generation of oil-based foam, fundamentally reduce drilling fluid density, this foaming system has good high thermal resistance simultaneously, and the froth stability produced at high-temperature stratum is strong.
Adopt technical scheme of the present invention, oil base drilling fluid system can control to form density 0.5g/cm
3~ 0.9g/cm
3oil-based foam, more than 30 minutes transformation period, and high temperature ageing still can control after 8 hours formed density 0.5g/cm
3~ 0.9g/cm
3oil-based foam, more than 30 minutes transformation period, achieve good technique effect.
Embodiment
[comparative example 1]
Get flourine-containing acrylate ester synthesized in 90 parts of white oils, 2 parts of sorbitan fatty acid esters, 2 parts of embodiments 1, stir, obtain oil base drilling fluid, the oil base drilling fluid obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 200mL, density 0.68g/cm
3, half foam life period 32 minutes, 150 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 130mL, density 0.86g/cm
3, half foam life period 15 minutes.
[embodiment 1]
(1) by 5 grams of C
8h
17a-OH and 67 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 100 DEG C, reacts 6 hours, then adds 6 grams of C
8h
17-Cl, continues reaction 3 hours, obtains C after reaction terminates through process
8h
17o (C
3h
6o)
30c
8h
17;
(2) by 10 grams of C
2h
3cOOC
8h
5f
12with 50 grams of C
2h
3cOOC
10h
21join in reactor, then add normal hexane, add 0.66 gram of AIBN, temperature of reaction is 50 DEG C, reacts 5 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) get suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of white oils, 2 parts (1) and 2 parts (2), stir, obtain the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 220mL, density 0.66g/cm
3, half foam life period 38 minutes, 150 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 210mL, density 0.66g/cm
3, half foam life period 38 minutes.
[embodiment 2]
(1) by 5 grams of C
12h
25a-OH and 55 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 90 DEG C, reacts 7 hours, then adds 4.7 grams of C
10h
21-Cl, continues reaction 4 hours, obtains C after reaction terminates through process
12h
25o (C
3h
6o)
35c
10h
21;
(2) by 10 grams of C
2h
3cOOC
10h
7f
14with 38 grams of C
3h
5cOOC
12h
25join in reactor, then add normal hexane, add 0.1 gram of AIBN, temperature of reaction is 60 DEG C, reacts 6 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of white oils, 3 parts (1) and 2 parts (2) is got, stir 60 minutes, then adding 2 number average molecular weights is the cis-1,4-polybutadiene rubber of 200,000, stirs, and obtains the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 220mL, density 0.66g/cm
3, half foam life period 39 minutes, 100 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 215mL, density 0.66g/cm
3, half foam life period 39 minutes.
[embodiment 3]
(1) by 5 grams of C
14h
27a-OH and 55 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 110 DEG C, reacts 8 hours, then adds 2 grams of C
3h
7-Cl, continues reaction 6 hours, obtains C after reaction terminates through process
14h
27o (C
3h
6o)
40c
3h
7;
(2) by 10 grams of C
3h
5cOOC
12h
9f
16with 25 grams of C
2h
3cOOC
14h
29join in reactor, then add normal hexane, add the AIBN of 0.45 gram, temperature of reaction is 65 DEG C, reacts 7 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of white oils, 4 parts (1) and 3 parts (2) is got, stir 60 minutes, then adding 2 number average molecular weights is the ethylene-propylene rubber(EPR) of 300,000, stirs, and obtains the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 230mL, density 0.63g/cm
3, half foam life period 41 minutes, 150 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 225mL, density 0.63g/cm
3, half foam life period 41 minutes.
[embodiment 4]
(1) by 5 grams of C
16h
25a-OH and 56 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 120 DEG C, reacts 8 hours, then adds 5.5 grams of C
16h
31-Cl, continues reaction 5 hours, obtains C after reaction terminates through process
16h
25o (C
3h
6o)
45c
16h
31;
(2) by 10 grams of C
3h
5cOOC
14h
9f
20with 18.5 grams of C
3h
5cOOC
15h
31join in reactor, then add toluene, add 0.1 gram of benzoyl peroxide, temperature of reaction is 85 DEG C, reacts 4 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) get suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of white oils, 4 parts (1) and 5 parts (2), stir, obtain the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 250mL, density 0.59g/cm
3, half foam life period 43 minutes, 180 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 240mL, density 0.60g/cm
3, half foam life period 42 minutes.
[embodiment 5]
(1) by 5 grams of C
14h
27a-OH and 68 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 80 DEG C, reacts 12 hours, then adds 4 grams of C
10h
15-Cl, continues reaction 6 hours, obtains C after reaction terminates through process
14h
27o (C
3h
6o)
50c
10h
15;
(2) by 10 grams of C
3h
5cOOC
16h
9f
24with 8.4 grams of C
3h
5cOOC
16h
33join in reactor, then add toluene, add 0.09 gram of AIBN, temperature of reaction is 85 DEG C, reacts 8 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) get suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of diesel oil, 6 parts (1) and 8 parts (2), stir, obtain the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 260mL, density 0.57g/cm
3, half foam life period 44 minutes, 200 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 250mL, density 0.59g/cm
3, half foam life period 42 minutes.
[embodiment 6]
(1) by 5 grams of C
10h
13a-OH and 106 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 140 DEG C, reacts 7 hours, then adds 5 grams of C
8h
15-Cl, continues reaction 4 hours, obtains C after reaction terminates through process
10h
13o (C
3h
6o)
55c
8h
15;
(2) by 10 grams of C
2h
3cOOC
18h
11f
26with 13 grams of C
3h
5cOOC
18h
37join in reactor, then add toluene, add 0.35 gram of AIBN, temperature of reaction is 90 DEG C, reacts 4 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of diesel oil, 5 parts (1) and 6 parts (2) is got, stir 60 minutes, then adding 2 number average molecular weights is the ethylene-propylene rubber(EPR) of 500,000, stirs, and obtains the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 270mL, density 0.55g/cm
3, half foam life period 46 minutes, 100 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 270mL, density 0.55g/cm
3, half foam life period 46 minutes.
[embodiment 7]
(1) by 5 grams of C
16h
31a-OH and 73 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 120 DEG C, reacts 4 hours, then adds 4.3 grams of C
12h
25-Cl, continues reaction 6 hours, obtains C after reaction terminates through process
16h
31o (C
3h
6o)
60c
12h
25;
(2) by 10 grams of C
3h
5cOOC
16h
5f
28with 11 grams of C
2h
3cOOC
17h
35join in reactor, then add toluene, add 0.1 gram of benzoyl peroxide, temperature of reaction is 105 DEG C, reacts 8 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of diesel oil, 4 parts (1) and 5 parts (2) is got, stir 60 minutes, then adding 2 number average molecular weights is the cis-1,4-polybutadiene rubber of 600,000, stirs, and obtains the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 260mL, density 0.57g/cm
3, half foam life period 46 minutes, 120 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 255mL, density 0.57g/cm
3, half foam life period 46 minutes.
[embodiment 8]
(1) by 5 grams of C
16h
31a-OH and 65 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 110 DEG C, reacts 5 hours, then adds 3.6 grams of C
10h
19-Cl, continues reaction 9 hours, obtains C after reaction terminates through process
16h
31o (C
3h
6o)
54c
10h
19;
(2) by 10 grams of C
3h
5cOOC
18h
7f
30with 5.5 grams of C
2h
3cOOC
12h
25join in reactor, then add normal hexane, add 0.1 gram of AIBN, temperature of reaction is 60 DEG C, reacts 12 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) get suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of whiterusss, 3 parts (1) and 4 parts (2), stir, obtain the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 250mL, density 0.58g/cm
3, half foam life period 42 minutes, 120 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 245mL, density 0.58g/cm
3, half foam life period 42 minutes.
[embodiment 9]
(1) by 5 grams of C
12h
17a-OH and 72 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 100 DEG C, reacts 5 hours, then adds 6.5 grams of C
14h
29-Cl, continues reaction 9 hours, obtains C after reaction terminates through process
12h
17o (C
3h
6o)
44c
14h
29;
(2) by 10 grams of C
2h
3cOOC
10h
9f
10with 6 grams of C
3h
5cOOC
11h
21join in reactor, then add toluene, add 0.13 gram of AIBN, temperature of reaction is 70 DEG C, reacts 10 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of whiterusss, 2 parts (1) and 4 parts (2) is got, stir 60 minutes, then adding 1 number average molecular weight is the ethylene-propylene rubber(EPR) of 100,000, stirs, and obtains the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 260mL, density 0.57g/cm
3, half foam life period 43 minutes, 130 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 255mL, density 0.57g/cm
3, half foam life period 42 minutes.
[embodiment 10]
(1) by 5 grams of C
14h
21a-OH and 54 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 70 DEG C, reacts 9 hours, then adds 4.3 grams of C
10h
19-Cl, continues reaction 4 hours, obtains C after reaction terminates through process
14h
21o (C
3h
6o)
38c
10h
19;
(2) by 10 grams of C
3h
5cOOC
12h
8f
17with 3.5 grams of C
3h
5cOOC
8h
17join in reactor, then add normal hexane, add 0.12 gram of AIBN, temperature of reaction is 50 DEG C, reacts 12 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of whiterusss, 3 parts (1) and 3 parts (2) is got, stir 60 minutes, then adding 1 number average molecular weight is the ethylene-propylene rubber(EPR) of 800,000, stirs, and obtains the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 240mL, density 0.61g/cm
3, half foam life period 42 minutes, 160 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 235mL, density 0.61g/cm
3, half foam life period 42 minutes.
[embodiment 11]
(1) by 5 grams of C
10h
19a-OH and 65 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 70 DEG C, reacts 8 hours, then adds 8.2 grams of C
16h
29-Cl, continues reaction 5 hours, obtains C after reaction terminates through process
10h
19o (C
3h
6o)
35c
16h
29;
(2) by 10 grams of C
3h
5cOOC
8h
2f
15with 12.6 grams of C
2h
3cOOC
16h
33join in reactor, then add toluene, add 0.4 gram of AIBN, temperature of reaction is 80 DEG C, reacts 6 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of whiterusss, 4 parts (1) and 3 parts (2) is got, stir 60 minutes, then adding 2 number average molecular weights is the cis-1,4-polybutadiene rubber of 500,000, stirs, and obtains the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 240mL, density 0.61g/cm
3, half foam life period 41 minutes, 180 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 230mL, density 0.62g/cm
3, half foam life period 40 minutes.
[embodiment 12]
(1) by 5 grams of C
2h
5a-OH and 126 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 90 DEG C, reacts 4 hours, then adds 8.3 grams of C
3h
5-Cl, continues reaction 8 hours, obtains C after reaction terminates through process
2h
5o (C
3h
6o)
20c
3h
5;
(2) by 10 grams of C
4h
9cOOC
6h
3f
8with 4.8 grams of C
4h
9cOOC
4h
7join in reactor, then add toluene, add 0.22 gram of AIBN, temperature of reaction is 70 DEG C, reacts 9 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) get suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of white oils, 2 parts (1) and 2 parts (2), stir, obtain the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 150mL, density 0.81g/cm
3, half foam life period 32 minutes, 80 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 145mL, density 0.81g/cm
3, half foam life period 32 minutes.
[embodiment 13]
(1) by 5 grams of C
4h
7a-OH and 100 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 80 DEG C, reacts 5 hours, then adds 7.8 grams of C
6h
5-Cl, continues reaction 5 hours, obtains C after reaction terminates through process
4h
7o (C
3h
6o)
25c
6h
5;
(2) by 10 grams of C
6h
11cOOC
4h
3f
6with 7.7 grams of C
5h
9cOOC
8h
15join in reactor and then add normal hexane, add 0.1 gram of AIBN, temperature of reaction is 60 DEG C, reacts 7 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of whiterusss, 3 parts (1) and 2 parts (2) is got, stir 60 minutes, then adding 2 number average molecular weights is the cis-1,4-polybutadiene rubber of 200,000, stirs, and obtains the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 190mL, density 0.74g/cm
3, half foam life period 33 minutes, 100 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 185mL, density 0.74g/cm
3, half foam life period 33 minutes.
[embodiment 14]
(1) by 5 grams of C
18h
19a-OH and 80 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 110 DEG C, reacts 7 hours, then adds 6.2 grams of C
20h
39-Cl, continues reaction 8 hours, obtains C after reaction terminates through process
18h
19o (C
3h
6o)
70c
20h
39;
(2) by 10 grams of C
5h
9cOOCF
3with 7 grams of C
4h
7cOOC
2h
3join in reactor, then add toluene, add 0.09 gram of AIBN, temperature of reaction is 90 DEG C, reacts 4 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of whiterusss, 2 parts (1) and 1 part (2) is got, stir 60 minutes, then adding 2 number average molecular weights is the ethylene-propylene rubber(EPR) of 900,000, stirs, and obtains the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 170mL, density 0.77g/cm
3, half foam life period 31 minutes, 120 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 165mL, density 0.77g/cm
3, half foam life period 30 minutes.
[embodiment 15]
(1) by 5 grams of C
20h
19a-OH and 95 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 80 DEG C, reacts 5 hours, then adds 1 gram of CH
3-Cl, continues reaction 5 hours, obtains C after reaction terminates through process
20h
19o (C
3h
6o)
90cH
3;
(2) by 10 grams of C
4h
7cOOC
20h
4f
35with 4 grams of C
6h
11cOOC
20h
41join in reactor, then add toluene, add 0.11 gram of AIBN, temperature of reaction is 80 DEG C, reacts 9 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) get suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of white oils, 3 parts (1) and 3 parts (2), stir, obtain the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 180mL, density 0.76g/cm
3, half foam life period 33 minutes, 160 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 170mL, density 0.77g/cm
3, half foam life period 31 minutes.
[embodiment 16]
(1) by 5 grams of C
6h
11a-OH and 116 gram propylene oxide joins in reactor, adds 0.5 gram of KOH, and temperature of reaction is 150 DEG C, reacts 18 hours, then adds 14 grams of C
18h
37-Cl, continues reaction 8 hours, obtains C after reaction terminates through process
6h
11o (C
3h
6o)
100c
18h
37;
(2) by 10 grams of C
5h
9cOOC
6h
7f
4with 5.3 grams of C
4h
9cOOC
3h
5join in reactor, then add normal hexane, add 0.08 gram of AIBN, temperature of reaction is 60 DEG C, reacts 4 hours, obtains the suds-stabilizing agent be made up of described molecular structure unit after reaction terminates through process;
(3) suds-stabilizing agent synthesized in whipping agent synthesized in 90 parts of diesel oil, 3 parts (1) and 2 parts (2) is got, stir 60 minutes, then adding 2 number average molecular weights is the cis-1,4-polybutadiene rubber of 300,000, stirs, and obtains the oil base drilling fluid for high-temperature stratum.
(4) oil base drilling fluid being used for high-temperature stratum obtained is sheared 60 minutes in atmosphere, measure the foaming of this system 160mL, density 0.79g/cm
3, half foam life period 31 minutes, 180 DEG C are stirred 60 minutes after aging 8 hours, measure the foaming of this system 150mL, density 0.80g/cm
3, half foam life period 30 minutes.
Table 1
Continued 1
Claims (10)
1., for an oil base drilling fluid for high-temperature stratum, comprise following component with weight parts:
The base oil of (1) 90 part;
The whipping agent of (2) 1 ~ 8 parts;
The suds-stabilizing agent of (3) 1 ~ 8 parts;
Wherein, the general molecular formula of whipping agent is: R
1-O-(C
3h
6o)
z-R
2, wherein, R
1and R
2all independently be selected from C
1-C
20fatty group, any one in aryl, z=20-100; Suds-stabilizing agent is that oil-soluble fluorine is or/and Silicon surfactant.
2., according to claim 1 for the oil base drilling fluid of high-temperature stratum, it is characterized in that described suds-stabilizing agent molecule is made up of following formula (1) and (2) two kinds of structural units:
Wherein, R
3and R
4all independently be selected from H or C
1-C
4alkyl; R' is selected from C
1-C
20the fatty group that replaces of F or aromatic base, the atom number of the ratio of F and H to be 0≤a/ (a+b) < 1, a be H in R', b is the atom number of F in R'; R'' is from C
1-C
40fatty group or aromatic base.
3., according to claim 1 for the oil base drilling fluid of high-temperature stratum, it is characterized in that described base oil is selected from hydrocarbon or/and ester.
4., according to claim 1 for the oil base drilling fluid of high-temperature stratum, it is characterized in that described base oil is selected from mineral oil and/or diesel oil.
5., according to claim 1 for the oil base drilling fluid of high-temperature stratum, it is characterized in that the R in described Blowing agent molecules general formula
1be selected from C
8-C
16fatty group, any one in aryl; R
2be selected from C
1-C
16fatty group, any one in aryl; Z=30-60.
6., according to claim 1 for the oil base drilling fluid of high-temperature stratum, it is characterized in that in described suds-stabilizing agent, R' is selected from C
8-C
18f replace fatty group or aromatic base; R'' is selected from C
10-C
18fatty group or aromatic base.
7., according to claim 1 for the oil base drilling fluid of high-temperature stratum, it is characterized in that described oil base drilling fluid also comprises 0-10 part tackifier.
8., according to claim 7 for the oil base drilling fluid of high-temperature stratum, it is characterized in that described tackifier are oil-soluble macromolecular compound.
9. the arbitrary described preparation method for the oil base drilling fluid of high-temperature stratum of claim 1 ~ 8, comprises the following steps:
(1) by R
1-OH and propylene oxide join in reactor, and under the existence of propoxylated Catalyst, temperature of reaction is 30-150 DEG C, and reaction 2-20 hour, then adds R
2-Cl, continue reaction 3-15 hour, obtaining general formula through process after reaction terminates is R
1-O-(C
3h
6o)
z-R
2whipping agent;
(2) by monomer C
2h
2r
3cOOR' and C
2h
2r
4cOOR'' joins in reactor, to account for the total quality of above-mentioned two kinds of monomers, add the oil-soluble initiator of 0.1%-2%, temperature of reaction is 50-120 DEG C, reaction 3-12 hour, obtains the suds-stabilizing agent be made up of described molecular structure unit through process after reaction terminates;
(3) by described component number, the suds-stabilizing agent obtained in the whipping agent obtained in base oil, step (1), step (2) is mixed, obtained described oil base drilling fluid.
10. the arbitrary described application of oil base drilling fluid in oil drilling for high-temperature stratum of claim 1 ~ 8, is characterized in that described high-temperature stratum temperature is 80-200 DEG C.
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| CN114075429A (en) * | 2020-08-20 | 2022-02-22 | 东营麦克卓尔石油化工有限公司 | Gas-to-oil foam drilling fluid and preparation method and application thereof |
| CN114437683A (en) * | 2020-11-03 | 2022-05-06 | 中石化石油工程技术服务有限公司 | High-temperature-resistant oil-based foam drilling fluid and preparation method thereof |
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| CN102559157A (en) * | 2011-12-09 | 2012-07-11 | 中国石油大学(华东) | Environmentally-friendly high-temperature-resistant synthetic base foam drilling fluid and preparation method thereof |
| CN103421474A (en) * | 2012-05-16 | 2013-12-04 | 中国石油化工股份有限公司 | Low density oil base drilling fluid |
| CN103773333A (en) * | 2012-10-20 | 2014-05-07 | 中国石油化工股份有限公司 | High-temperature and oil-resistant foam drilling fluid, and preparation method thereof |
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| CN103421474A (en) * | 2012-05-16 | 2013-12-04 | 中国石油化工股份有限公司 | Low density oil base drilling fluid |
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| CN114437683A (en) * | 2020-11-03 | 2022-05-06 | 中石化石油工程技术服务有限公司 | High-temperature-resistant oil-based foam drilling fluid and preparation method thereof |
| CN114437683B (en) * | 2020-11-03 | 2023-08-11 | 中石化石油工程技术服务有限公司 | High-temperature-resistant oil-based foam drilling fluid and preparation method thereof |
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