CN100591744C - Oil gas well fracturing fluid for stratum of high temperature of 180-200 DEG C - Google Patents
Oil gas well fracturing fluid for stratum of high temperature of 180-200 DEG C Download PDFInfo
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- CN100591744C CN100591744C CN200910058231A CN200910058231A CN100591744C CN 100591744 C CN100591744 C CN 100591744C CN 200910058231 A CN200910058231 A CN 200910058231A CN 200910058231 A CN200910058231 A CN 200910058231A CN 100591744 C CN100591744 C CN 100591744C
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Abstract
The invention relates to an oil-gas well fracturing fluid used in a high-temperature stratum at 180 to 200 DEG C in an ultrahigh temperature compression fracture stimulation technique. The technical proposal comprises: the raw materials used by the fracturing fluid comprise the following components in percentage by weight: 0.3 to 0.6 percent of thickening agent, 0.1 to 0.7 percent of crosslinkingagent, 0.3 to 0.6 percent of clay stabilizer, 0.2 to 0.6 percent of bactericidal agent, 0.1 to 0.4 percent of pH conditioning agent, 0.3 to 0.6 percent of temperature stabilizing agent, 0.2 to 0.7 percent of cleanup additive, 200 to 1500 ppm of gel breaker, 2 percent of potassium chloride, and 94 to 96 percent of water. The high-temperature fracturing fluid adopts high-temperature resistant hydroxypropyl carboxymethyl guargum as the thickening agent and uses a high-temperature crosslinking agent compounded from organic boron and organic zirconium. The fracturing fluid has the advantages of good shear resistance and temperature resistance, good gel breaking effect, friction resistance reduction and low permeability, wherein the viscosity can be kept between 70 and 80 MPa.s after the fracturing fluid is sheared for 120 minutes under the condition of 190 DEG C and 170s<-1>. The fracturing fluid is successfully applied to the Zhuanggu No.63 well of which the stratum temperature is 184.6 DEG C in Shengli Oil Field.
Description
Technical field
The present invention relates to the oil and gas well fracturing fluid of 180-200 ℃ of high-temperature stratum of use in a kind of ultrahigh-temperature well fracturing yield-increasing technology transformation.
Background technology
China's hydrocarbon resources quality is poor relatively poor.In the residual petroleum workable reserve, hypotonic or special low oil impregnate, heavy oil, viscous crude and buried depth account for more than 50% greater than 3500m's; Adopted stock number to be verified will be that the difficulty that buried depth is bigger, quality is poorer, marginality is stronger is employed resource.Can adopt, easily adopt at oil under the situation that reserves constantly reduce, the oil field prospecting exploitation from the ocean, bad ground, deep-well, middle-deep well and the development of ultra deep well aspect, these ultra deep well are generally all more than 4000 meters.Under the normal temps gradient, formation temperature is all more than 120 ℃ for the oil gas well more than 4000 meters, and the temperature of the oil gas well of those abnormal high temperature degree gradients can reach more than 150 ℃.In order to increase production, to deep layer, the high temperature oil gas well is faced with following problem when carrying out fracturing reform: the formation temperature height, require fracturing liquid to have good heat resistance and because the pipeline that fracturing liquid is flowed through is longer, the high-shear time of experience increases, the requirement fracturing liquid possesses the good viscosity recovery under high temperature and high-shear, also will have the delay cross linking performance, to reduce mobile frictional resistance.Nowadays existing fracturing liquid can not satisfy these requirements, so it is good to develop a kind of heat resistance, the moderate super-high temperature fracturing fluid of cost be a urgent task (Chen Yuanqi, Chinese net " about the suggestion of China's hydrocarbon resources strategic issue " www.china.org.cn, 2002-3-5).Existing fracturing liquid generally is used in the stratum below 120 ℃, be applicable to that high-temperature stratum (more than 120 ℃) is fewer, as EP0302544A2, and the fracturing liquid that can satisfy ultrahigh-temperature (more than 150 ℃) stratum is also rarely found in the market, and can satisfy the domestic report that yet there are no of fracturing liquid of formation temperature more than 180 ℃.
Summary of the invention
The objective of the invention is: in order to improve of the fracturing fluid heat resistance, make fracturing liquid under the situation of high temperature high-shear, have good viscosity, has the good grittiness energy of taking, to adapt to the needs that the oil-gas field yield-increasing technology is transformed, thereby the raising crude production rate, the spy provides a kind of 180-200 of being used for the oil and gas well fracturing fluid of ℃ high-temperature stratum.
In order to achieve the above object, the technical scheme that the present invention proposes is: the oil and gas well fracturing fluid of a kind of 180-200 of being used for ℃ high-temperature stratum, it is characterized in that: fracturing liquid weight percent raw materials used and each component is as follows, wherein unit is gram or kilogram, thickening material 0.3～0.6%, a kind of with in hydroxypropyl carboxy methyl guanidine glue or konjak gum or sesbania gum or the carboxymethyl cellulose; Linking agent 0.1～0.7%, organic boron and organic zirconium compound high-temperature cross-linking agent, use with boron and zirconium compound part be a kind of in ethyl butyl propanediol or tetramethylolmethane or neopentyl glycol or the glycol ether hexichol; Clay stabilizer 0.3-0.6% is that alkyl wherein is the fat hydrocarbon chain of 1-3 carbon atom with the multipolymer of V-Pyrol RC and ethene-1-substituent methyl trialkyl ethylammonium chloride ether, and three alkyl can be identical, also can be different; Sterilant 0.2-0.6%, a kind of with formaldehyde or glutaraldehyde; PH regulator agent 0.1-0.4%, a kind of with in sodium bicarbonate or the ammoniacal liquor, final pH is 9-10; Temperature stabilising agent 0.3-0.6%, with trolamine or morpholine or N, N-dialkyl group azanol, wherein alkyl is the fat hydrocarbon chain of 1-3 carbon atom; Gel breaker 200-1500ppm, a kind of with in Sodium Persulfate or the ammonium persulphate, gel breaker adopts capsule form; Cleanup additive 0.2-0.7%, with 1,3-two (alkyl amine oxide)-2-propyl alcohol, wherein alkyl is a kind of in the fat hydrocarbon chain of 1-4 carbon atom or the Dodecyl trimethyl ammonium chloride; Repone K 2%; Water is 94-96%.
The preparation method of oil and gas well fracturing fluid provided by the present invention is: earlier resistant to elevated temperatures hydroxypropyl carboxy methyl guanidine glue is pressed the pulvis and the Repone K 2% of 0.3-0.6% proportioning, adding the Wu Yin that fills the 500mL test water mixes in the accent device, it was stirred under low speed about 5 minutes, control voltage at 50V-55V with powerstat then, make and mix to transfer device again in high-speed stirring under the rotating speed about 600r/min about 10 minutes, make it become uniform solution, pour in the beaker and add a cover, put into the static constant temperature of 60 ℃ of water-baths of constant temperature 4 hours, base fluid viscosity is tended towards stability; Adding sodium bicarbonate adjusting liquid pH then is 10, adds temperature stabilising agent 0.5% simultaneously, cleanup additive 0.5%, and clay stabilizer 0.5%, the linking agent of adding 0.3% stirs, and obtains this oil and gas well fracturing fluid.
Super-high temperature fracturing fluid of the present invention mainly is to have adopted resistant to elevated temperatures hydroxypropyl carboxy methyl guanidine glue and organic boron and organic zirconium compound high-temperature cross-linking agent, with boron and zirconium compound part be a kind of in ethyl butyl propanediol or tetramethylolmethane or neopentyl glycol or the glycol ether hexichol.
The base fluid viscosity of super-high temperature fracturing fluid of the present invention is 80 ℃ in temperature about 80mPa.s, and discharge capacity is 5m
3/ min, caliber are that resistance-reducing yield can reach 37.99% in the frictional resistance experiment of 76mm.
Compared with prior art, the beneficial effect of product of the present invention is: this fracturing liquid has well anti-shearing, and temperature tolerance can be under 190 ℃, 170s
-1Shear 120min viscosity and can also remain on 70-80mPa.s, broken glue is effective, is applicable to the fracturing yield increasing transformation of ultrahigh-temperature oil gas well fully, thereby improves the crude oil gas production.It is 184.6 ℃ ancient 63 wells of Shengli Oil Field stake that this fracturing liquid successfully is used in formation temperature.
Description of drawings
Fig. 1 is that product of the present invention is at 180 ℃ of following super-high temperature fracturing fluid viscosity-time curves
Fig. 2 is that product of the present invention is at 190 ℃ of following super-high temperature fracturing fluid viscosity-time curves
Embodiment
Taking by weighing 5.4g hydroxypropyl carboxy methyl guanidine glue and 20g Repone K mixes under solid phase, add 1000ml water, in mixing the accent device, stir 10min, liquid placed make the abundant swelling of guanidine glue half an hour, add 5g formaldehyde again, 5g1,3-two (alkyl amine oxide)-2-propyl alcohol, add the 1.5g sodium bicarbonate, the multipolymer and the 5g N of 5g V-Pyrol RC and ethene-1-substituent methyl trialkyl ethylammonium chloride ether, N-dialkyl group azanol is finished the preparation of base fluid, recording the base fluid apparent viscosity is 77mpas, and surface tension is 32.2mN/m.
Taking by weighing 5.5g hydroxypropyl carboxy methyl guanidine glue and 20g Repone K mixes under solid phase, add 1000ml water, in mixing the accent device, stir 10min, liquid is placed made the abundant swelling of guanidine glue half an hour, add 5g formaldehyde again, 5g1,3-two (alkyl amine oxide)-2-propyl alcohol adds the 1.5g sodium bicarbonate, the multipolymer and the 5g N of 5g V-Pyrol RC and ethene-1-substituent methyl trialkyl ethylammonium chloride ether, N-dialkyl group azanol is finished the preparation of base fluid, and recording the base fluid apparent viscosity is 82mpas.
Embodiment 3
Taking by weighing 5.6g hydroxypropyl carboxy methyl guanidine glue and 20g Repone K mixes under solid phase, add 1000ml water, in mixing the accent device, stir 10min, liquid is placed made the abundant swelling of guanidine glue half an hour, add 5g formaldehyde again, 5g1,3-two (alkyl amine oxide)-2-propyl alcohol adds the 1.5g sodium bicarbonate, the multipolymer and the 5g N of 5g V-Pyrol RC and ethene-1-substituent methyl trialkyl ethylammonium chloride ether, N-dialkyl group azanol is finished the preparation of base fluid, and recording the base fluid apparent viscosity is 84mpas.
Embodiment 4
The base fluid of embodiment 1 is carried out the frictional resistance experiment, record at 40 ℃ and 80 ℃ respectively that the resistance-reducing yield with respect to clear water sees the following form under the different tube diameters.
The resistance-reducing yield of GHPG under table 1 different tube diameters, the temperature condition
Embodiment 5
According to embodiment 1 preparation base fluid, under agitation add organic boron of 3g and organic zirconium multiple crosslinking agent, placement makes fracturing liquid be cross-linked to form frozen glue.Frozen glue is at 180 ℃, 170s
-1The high temperature evaluation result shows (accompanying drawing 1), this super-high temperature fracturing fluid frozen glue viscosity remains on more than the 300mPa.s in 20min, viscosity remains on about 100mPa.s after shearing 60min, and viscosity also slightly rises after shear time extends to 90min, and ascensional range is 15-20mPa.s; Its viscosity still remains on 90-100mPa.s behind continuous shearing 120min.The whole piece curve is kept metastable state substantially in its viscosity of latter half, has shown excellent anti-shear performance, and test-results proves that super-high temperature fracturing fluid has been obtained substantial breakthrough technically.
Embodiment 6
According to embodiment 1 preparation base fluid, under agitation add organic boron of 3g and organic zirconium multiple crosslinking agent, placement makes fracturing liquid be cross-linked to form frozen glue.Frozen glue is at 190 ℃, 170s
-1The high temperature evaluation result shows (accompanying drawing 2), this super-high temperature fracturing fluid frozen glue viscosity viscosity after shearing 60min remains on about 60-70mPa.s, viscosity has rising by a relatively large margin after shear time extends to 90min, and ascensional range is 70-80mPa.s, and viscosity rises to about 150mPa.s; Its viscosity still remains on 70-80mPa.s behind continuous shearing 120min.
Embodiment 7
According to embodiment 1 preparation base fluid, under agitation add organic boron of 3g and organic zirconium multiple crosslinking agent, placement makes fracturing liquid be cross-linked to form frozen glue, adds the 50ppm ammonium persulphate, carries out 170s under 180 ℃ of conditions
-1Shear continuously, this super-high temperature fracturing fluid frozen glue is under the effect of 50ppm gel breaker, and viscosity remains on about 50mPa.s behind the shearing 30min; After shear time extended to 50min, viscosity drop was low to moderate 20mPa.s; After shearing 70min, viscosity is reduced to below the 10mPa.s.
Embodiment 8
According to embodiment 1 preparation base fluid, under agitation add organic boron of 3g and organic zirconium multiple crosslinking agent, placement makes fracturing liquid be cross-linked to form frozen glue, adds the 50ppm ammonium persulphate, makes its broken glue under 180 ℃ of conditions.At 170s
-1The breaking glue solution apparent viscosity is 3mPa.s.Get the 40ml breaking glue solution and be contained in four centrifuge tubes, centrifugal 30min under the rotating speed of 3000r/min with clear water washing three times, puts into 105 ℃ baking oven heating, drying after the taking-up, weigh.The residue content of super-high temperature fracturing fluid of the present invention is 587mg/L, and the residue rate is 10.6%, can satisfy construction requirement.
Embodiment 9
According to embodiment 1 preparation base fluid, under agitation add organic boron of 3g and organic zirconium multiple crosslinking agent, placement makes fracturing liquid be cross-linked to form frozen glue, adds the 300ppm ammonium persulphate, makes its broken glue under 180 ℃ of conditions.Be used for determining that with rock core flowing experiment formation sample under the simulation well disposition is to the effect of treatment solution.The rate of permeation of super-high temperature fracturing fluid of the present invention is 11.26mD, and leakoff coefficent is 3.56x10
-4M/min
0.5
Embodiment 10.
Get the Xinjiang clay and suppress 10min under 10MPa pressure, obtain the clay cake, put into anti-swollen determinator, add the fracturing liquid 15ml according to the formulated of embodiment 1, final anti-swollen rate was 86.05% in 24 hours.
Embodiment 11
Ancient 63 well locations of Shengli Oil Field stake are in Shandong Province's Dongying City Hekou District Xian He town about 16.5km in northeast, implementing fracturing reform is the Taiyuan group (4738.2-4742.4m) of the upper palaeozoic Carboniferous system, this well Ordovician system 4672.24m well completing test data, amounting to underground temperature gradient is 3.89 ℃/100m, the fractured interval formation temperature is expected to be 184.6 ℃, domesticly also the interval of high-temperature like this was not carried out pressure break, so just require fracturing liquid to have good heatproof, anti-shear ability.
Proportioning configuration 275m according to example 1
3Super-high temperature fracturing fluid, base fluid viscosity measurements 97mPa.s, the demonstration of experiment rheology experimental result, 180 ℃, 170s
-1, frozen glue viscosity is 90-100mPa.s behind the shearing 60min.Ancient 63 wells of stake are actual goes into ground liquid measure 245.63m
3, design adds sand 26m
3, the actual sand 26m that adds
3, pressing crack construction is very successful, shows that the related super-high temperature fracturing fluid of this invention can satisfy the needs of ultrahigh-temperature stratafrac construction.
Claims (1)
1, a kind of oil and gas well fracturing fluid that is used for 180-200 ℃ of high-temperature stratum is characterized in that: fracturing liquid weight percent raw materials used and each component is as follows, and wherein unit is gram or kilogram, and thickening material 0.3～0.6% is with hydroxypropyl carboxy methyl guanidine glue; Organic boron of linking agent 0.1～0.7% usefulness and organic zirconium compound high-temperature cross-linking agent, with boron and zirconium compound part be a kind of in ethyl butyl propanediol or tetramethylolmethane or neopentyl glycol or the glycol ether hexichol; Clay stabilizer 0.3-0.6% is that alkyl wherein is the fat hydrocarbon chain of 1-3 carbon atom with the multipolymer of V-Pyrol RC and ethene-1-substituent methyl trialkyl ethylammonium chloride ether, and three alkyl can be identical, also can be different; Sterilant 0.2-0.6%, a kind of with formaldehyde or glutaraldehyde; PH regulator agent 0.1-0.4%, a kind of with in sodium bicarbonate or the ammoniacal liquor, final pH is 9-10; Temperature stabilising agent 0.3-0.6%, with trolamine, morpholine or N, N-dialkyl group azanol, wherein alkyl is the fat hydrocarbon chain of 1-3 carbon atom; Gel breaker 200-1500ppm, a kind of with in Sodium Persulfate or the ammonium persulphate, gel breaker adopts capsule form; Cleanup additive 0.2-0.7%, with 1,3-dialkyl group amine oxide-2-propyl alcohol, wherein alkyl is a kind of in the fat hydrocarbon chain of 1-4 carbon atom or the Dodecyl trimethyl ammonium chloride; Repone K 2%; Water is 94%-96%.
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