CN104962260A - High-temperature spacer fluid suspension stabilizer for well cementation, preparation method of high-temperature spacer fluid suspension stabilizer and application of high-temperature spacer fluid suspension stabilizer - Google Patents
High-temperature spacer fluid suspension stabilizer for well cementation, preparation method of high-temperature spacer fluid suspension stabilizer and application of high-temperature spacer fluid suspension stabilizer Download PDFInfo
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- CN104962260A CN104962260A CN201510329174.7A CN201510329174A CN104962260A CN 104962260 A CN104962260 A CN 104962260A CN 201510329174 A CN201510329174 A CN 201510329174A CN 104962260 A CN104962260 A CN 104962260A
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- spacer pad
- suspension stabilizer
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- well cementation
- weight parts
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/40—Spacer compositions, e.g. compositions used to separate well-drilling from cementing masses
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
Abstract
The invention provides a high-temperature spacer fluid suspension stabilizer for well cementation, a preparation method of the high-temperature spacer fluid suspension stabilizer and application of the high-temperature spacer fluid suspension stabilizer. The high-temperature spacer fluid suspension stabilizer for well cementation comprises the following ingredients in part by weight: 58-85 parts of clay substances, 8-20 parts of welan gum, 0-5 parts of xanthan gum, 5-10 parts of inorganic salt and 2-8 parts of high-molecular polymer. The high-molecular polymer comprises one or more than one of polyvinyl alcohol, hydroxymethyl cellulose, hydroxyethyl cellulose and hydroxypropyl starch ether. The suspension stabilizer serves as an additive and is added into spacer fluid; and after being added with the suspension stabilizer, the spacer fluid has high suspension stability, high consistency, high rheological property and high resistance to elevated temperature.
Description
Technical field
The present invention relates to a kind of well cementation high temperature spacer pad suspension stabilizer and preparation method thereof and application, belong to reinforcing oil well spacer pad technical field.
Background technology
In reinforcing oil well construction operation, drilling fluid and grout are inconsistent often, if both directly contact, the then retrogradation of contact surface mixed slurry section fluid, flocculation, fluid rheology performance worsens, fluid frictional resistance, discharge capacity and return the water conservancy parameters such as speed corresponding change occurs, thus affect the displacement efficiency of fluid, and consequent high pump pressure very easily leakage of thin layer.In addition, the throw out in drilling fluid sticks on the borehole wall and casing wall and easily forms false filter cake, has a strong impact on the bonding quality of grout and second interface, very easily causes the problems such as the tight or inefficacy of annular space microgap, interlayer sealing.Therefore; for above problem; need inject between grout and drilling fluid a kind ofly effectively to isolate, the liquid-spacer pad of washing action; require it effectively can isolate drilling fluid and grout, clean the borehole wall, improve displacement efficiency, the well cementation bonding quality of reservoir protec-tion, guarantee cement and ring second interface, provide the technical guarantee of well cementation aspect for oil well subsequent job and oil field increasing the storage produce.
In recent years, along with the development of petroleum exploration and development technology and Shallow Reservoirs increasingly exhausted, the Holes of Complicated Wells such as many high temperature deep wells, ultra deep well occur in succession, for the development of well cementation spacer pad technology and application propose great challenge.Displacement characteristic, suspension characteristic, the stabilising characteristic of separating liquid system and receive much concern with the compatible properties of contacting with fluid, wherein stabilising characteristic ensures effectively isolation, suspension solid phase particles and high-density weighting material, prevents well slough and suppresses the salient features of leakage etc., especially in high temperature deep well, ultra deep well and horizontal well and long horizontal traverse well well cementation, seem particularly important, and suspension stabilizer is the deciding factor ensureing spacer pad stabilising characteristic.The domestic research to well cementation separating liquid system is more, but less to the research of high temperature spacer pad suspension agent, and also fresh is in the literature rare.
CN 101775273 B discloses a kind of high-temperature resistance base fluid for well cementing of oil and preparation method and application, this base fluid heatproof can reach 150 DEG C, mainly comprise 100 weight parts waters, 6 ~ 20 parts of macromolecule tackifers, 1 ~ 8 part of tensio-active agent, 1 ~ 8 part of shale stabilizer and 2 ~ 15 parts of high-temperature stabilisers, wherein, macromolecule tackifer is one or more in xanthan gum class, high molecular cellulose base polymer, and high-temperature stabiliser is the one in wilkinite, attapulgite.But the large number of biological glue thickening after this base fluid complicated process of preparation, fully aquation is serious, and then comparatively large to increasing the weight of j ob impact, in addition, the cellulose substances in this base fluid has delayed coagulation, and the high temperature tackifying of clay-type substance in this base fluid is poor.
CN 100582192 C discloses a kind of insulating liquid for injecting cement in oil well, suspension agent in this system is made up of Natvosol, Walocel MT 20.000PV, xanthan gum and sodium bentonite, under middle low temperature, there is good suspension effect, but do not introduce the spacer pad stability under high temperature.
CN 101921580 B discloses a kind of high temperature resistant anti-salt isolation solution and preparation method thereof, and the suspension agent in this separating liquid system is Polyanionic Cellulose or xanthan gum, and this system has at 1.10 ~ 2.50g/cm
3in scope, performance is controlled, and heatproof reaches 150 DEG C, and anti-salt reaches saturated, and with grout and the feature such as drilling fluid consistency is good.
In summary, spacer pad suspension agent many employings cellulose family of the prior art, xanthan gum and clay-type substance, its composition is comparatively single.In deep-well, ultra deep well cementing operation operation, at high temperature easily there is pyrohydrolysis or molecular rupture in Tackifier materials and suspension stabilizer, do not have suspension solid phase particles completely, wash away the effect of mud cake, have a strong impact on the high temperature stability properties of spacer pad, efficiency of displacement, severe patient will cause well slough or leakage, and then affects cementing quality.
Therefore, in order to meet the cementing technology demand of the exceptional wells such as high temperature deep well, ultra deep well, high-angle wells and horizontal wells, ensure cementing quality and ensure oil well subsequent job, oil field increasing the storage are produced, be necessary to study a kind of new type high temperature spacer pad suspension stabilizer, effectively to improve or to improve the high-temperature comprehensive property of well cementation spacer pad.
Summary of the invention
One object of the present invention is to provide a kind of well cementation high temperature spacer pad suspension stabilizer, and this suspension stabilizer can make spacer pad possess good suspension stability, consistency, rheological and high thermal resistance.
Another object of the present invention is to provide the preparation method of described well cementation high temperature spacer pad suspension stabilizer, described method is simple, easy to operate.
Another object of the present invention is to provide the application of described well cementation high temperature spacer pad suspension stabilizer.
Another object of the present invention is to provide a kind of high temperature resistant spacer pad, and it comprises well cementation high temperature spacer pad suspension stabilizer of the present invention.
Another object of the present invention is to provide the application of described high temperature resistant spacer pad.
For reaching aforementioned object, on the one hand, the invention provides a kind of well cementation high temperature spacer pad suspension stabilizer, it comprises the high molecular polymer of the clay material of 58 ~ 85 weight parts, the warm human relations glue of 8 ~ 20 weight parts, the xanthan gum of 0 ~ 5 weight part, the inorganic salt of 5 ~ 10 weight parts and 2 ~ 8 weight parts, described high molecular polymer comprise in polyvinyl alcohol, Walocel MT 20.000PV, Natvosol, hydroxypropyl starch ether one or more.
The present invention, by each component in optimization suspension stabilizer and content thereof, makes each component act synergistically, thus ensure that the spacer pad being added with suspension stabilizer of the present invention possesses good suspension stability, consistency, rheological and high thermal resistance.Specifically, the suspension stabilizer described in the present invention confirms to add by experiment can meet the requirement of well cementing operation to spacer pad stability, and increases further along with dosage, the difference of densities of system can be down to 0g/cm
3, proved invention high temperature suspension stabilizer has good suspending stabilized performance.The spacer pad and grout, the drilling fluid that are added with described suspension stabilizer have good consistency, can play the effects such as effective isolation, suspension, displacement; Described suspension stabilizer substantially without impact, can realize turbulence replacement to the rheological characteristics of spacer pad; The applicable density range of this suspension stabilizer is 1.10 ~ 2.50g/cm
3, temperature range applicatory is 30 ~ 150 DEG C and along with the rising of temperature, the suspension stability of spacer pad and rheological property are without considerable change.Be added with the every good performance of more than the spacer pad of suspension stabilizer of the present invention guarantee the safety of cementing operation and ensure cementing quality.
Unless otherwise specified, described content or ratio are weight content or part by weight in the present invention, and described part is weight part.
Warm human relations glue described in the present invention is that the bacterial strain extracted from Alcaligenes nutrient solution is main raw material with carbohydrate such as starch, utilizes biotechnology to ferment the biological polyoses produced, the tetrose repeating unit that its structure is made up of D-Glucose, D-Glucose aldehydic acid, L-rhamnosyl, L-seminose, it can buy and obtain or prepare by method of the prior art from prior art.
The structural formula of temperature human relations glue is as follows:
To be W-Gum to ferment the complex polysaccharide produced through the yellow sporangium of bird rape xanthan gum described in the present invention, and its molecular structure is made up of D-Glucose, D-MANNOSE, D-Glucose aldehydic acid, ethanoyl, pyruvic acid.It can buy and obtain or prepare by method of the prior art from prior art.
The structural formula of xanthan gum is as follows:
According to specific embodiment of the invention scheme, in well cementation high temperature spacer pad suspension stabilizer of the present invention, this well cementation high temperature spacer pad suspension stabilizer comprises the high molecular polymer of the clay material of 65 ~ 76 weight parts, the warm human relations glue of 13 ~ 17 weight parts, the xanthan gum of 2 ~ 4 weight parts, the inorganic salt of 6 ~ 8 weight parts and 3 ~ 6 weight parts.
According to specific embodiment of the invention scheme, in well cementation high temperature spacer pad suspension stabilizer of the present invention, this well cementation high temperature spacer pad suspension stabilizer comprises the high molecular polymer of the clay material of 70 ~ 76 weight parts, the warm human relations glue of 16 ~ 17 weight parts, the xanthan gum of 3 ~ 4 weight parts, the inorganic salt of 7 ~ 8 weight parts and 4 ~ 6 weight parts.
According to specific embodiment of the invention scheme, in well cementation high temperature spacer pad suspension stabilizer of the present invention, described clay material comprise in wilkinite, attapulgite, diatomite etc. one or more; Described inorganic salt comprise sodium-chlor and/or Repone K.Preferably, described clay material is attapulgite, uses attapulgite as the main base of suspension stabilizer in the present invention, can further improve the suspension stability, temperature tolerance, saline-alkali tolerance etc. of well cementation separating liquid system, also can reduce product cost.Described attapulgite be a kind of have chain laminate structure containing Shuifu County's magnesium silicate clay material.
According to specific embodiment of the invention scheme, in well cementation high temperature spacer pad suspension stabilizer of the present invention, described high molecular polymer is polyvinyl alcohol; Preferably, its polymerization degree is 1000 ~ 2000, and alcoholysis degree is 85% ~ 89%.It can buy and obtain such as PVA-1788 (polymerization degree is 1700, and alcoholysis degree is 88%) from prior art, or prepares by method of the prior art, such as, can be obtained by Alcoholysis of Polyvinyl Acetate.
According to specific embodiment of the invention scheme, in well cementation high temperature spacer pad suspension stabilizer of the present invention, described clay material is attapulgite, and described inorganic salt are sodium-chlor, and described high molecular polymer is polyvinyl alcohol.
On the other hand, the invention provides the preparation method of described well cementation high temperature spacer pad suspension stabilizer, described method comprises: each component in well cementation high temperature spacer pad suspension stabilizer of the present invention mixed and can obtain described well cementation high temperature spacer pad suspension stabilizer.Homogeneity due to described suspension stabilizer affects its result of use, and further, the present invention prepares described well cementation high temperature spacer pad suspension stabilizer by the following method:
Described clay material is added in powder mixer, add described warm human relations glue, described xanthan gum, described inorganic salt and described high molecular polymer under agitation successively, after puddling, obtain described well cementation high temperature spacer pad suspension stabilizer.This preparation method is simple, easy to operate, and each component of well cementation high temperature spacer pad suspension stabilizer of the present invention can be made fully to mix, and effectively improves its result of use.As a specific embodiments of the present invention, the powder mixer used can adopt as CM500-II type powder mixer (power 10KW, output 12 ~ 25t/h, the general mechanical engineering company limited of Nanjing Olympic).
Again on the one hand, the invention provides the application of described well cementation high temperature spacer pad suspension stabilizer.Known by describing above, can well cementation high temperature spacer pad suspension stabilizer of the present invention be added in separating liquid system, to improve or to improve the properties of spacer pad, especially resistance to elevated temperatures, therefore, the invention provides described well cementation high temperature spacer pad suspension stabilizer and prepare the application in spacer pad.
Another aspect, the invention provides a kind of high temperature resistant spacer pad, and it comprises well cementation high temperature spacer pad suspension stabilizer of the present invention.Specifically, high temperature resistant spacer pad of the present invention, in the gross weight of this spacer pad for 100%, it contains 0.9% ~ 3.5% well cementation high temperature spacer pad suspension stabilizer of the present invention.Preferably, described high temperature resistant spacer pad comprises the water of 100 weight parts, the well cementation high temperature spacer pad suspension stabilizer of the described of 3 ~ 6 weight parts, the defoamer of 0.2 ~ 0.6 weight part, the high-density weighting material of 0 ~ 245 weight part; Preferably, described defoamer is tributyl phosphate; The optional consisting of barite of described high-density weighting material and/or powdered iron ore.High temperature resistant spacer pad of the present invention possesses good foregoing suspension stability, consistency, rheological and high thermal resistance.
Further aspect of the present invention provides the application in the cementing operation of described high temperature resistant spacer pad; Preferably, described well is high temperature deep well, ultra deep well, long horizontal traverse well and horizontal well.Because the spacer pad being added with well cementation high temperature spacer pad suspension stabilizer of the present invention has excellent performance mentioned above, therefore, described high temperature resistant spacer pad is applied in cementing operation, well cementing process safety and cementing quality can be guaranteed.
High temperature deep well described in the present invention typically refer to bottom hole circulating temperature higher than 120 DEG C and vertical well depth at the Oil/gas Well of 4500 ~ 6000m; Described ultra deep well refers to the Oil/gas Well of vertical well depth at 6000 ~ 9000m; Described long horizontal traverse well refer to drilling well plagioclase and the ratio of vertical depth be greater than 2 and hole drift angle at the orientation well of 60 ° ~ 86 °; Described horizontal well is that well track moves towards basically identical with oil reservoir, and hole drift angle is not less than the particular orientation well of 86 °.
In sum, the present invention is compared with existing spacer pad suspension agent, there is following beneficial effect: the spacer pad Applicable temperature scope that (1) is added with this well cementation high temperature spacer pad suspension stabilizer is 30 ~ 150 DEG C, have good heat resistance, the viscosity of separating liquid system, stability raise with temperature and without considerable change; (2) high temperature spacer pad suspension stabilizer of the present invention on the rheological characteristics of spacer pad substantially without impact; (3) spacer pad increases the weight of a wider range (1.10 ~ 2.50g/cm
3), can require to carry out density design according to different densities; (4) high-temperature stable and the suspension characteristic of well cementation spacer pad is effectively improved; (5) spacer pad and grout, the drilling fluid that are added with this well cementation high temperature spacer pad suspension stabilizer have good consistency, can play effective isolation, suspension, displacement effect, guarantee the safety of cementing operation and ensure cementing quality; (6) well cementation high temperature spacer pad suspension stabilizer preparation technology of the present invention is simple, easy to operate, use is efficient, effectively can improve high temperature stability properties and the suspension characteristic of well cementation spacer pad, guarantees the safety of cementing operation and ensure cementing quality.
Accompanying drawing explanation
Fig. 1 is the relation curve of the high temperature spacer pad suspension stabilizer dosage for preparing of embodiment 1 and spacer pad density difference, and wherein, spacer pad density is 2.20g/cm
3, use barite and powdered iron ore to increase the weight of respectively;
Fig. 2 is the multiviscosisty curve of grout under 130 DEG C × 80MPa condition in embodiment 7;
Fig. 3 is the 130 DEG C × 80MPa multiviscosisty curve of grout in embodiment 7, spacer pad and drilling fluid mixed thing; Wherein, grout: spacer pad: drilling fluid=1:1:1 (volume ratio);
Fig. 4 is the 130 DEG C × 80MPa multiviscosisty curve of grout in embodiment 7, spacer pad mixture; Wherein, grout: spacer pad=7:3 (volume ratio).
Embodiment
In order to there be understanding clearly to technical characteristic of the present invention, object and beneficial effect, now in conjunction with specific embodiments and accompanying drawing following detailed description is carried out to technical scheme of the present invention, these examples should be understood and be only not used in for illustration of the present invention and limit the scope of the invention.
Time prepared by the high temperature spacer pad suspension stabilizer of embodiment 1 ~ 5, instrument of puddling used is CM500-II type powder mixer (power 10KW, output 12 ~ 25t/h, the general mechanical engineering company limited of Nanjing Olympic), its working mechanism is: per minute cutting material more than 1800 times on cross section, then participate in the combination of new material component with minimum unit, mixture is even, and does not destroy original raw meal particle size; The helical-blade paddle blade of the arranged crosswise adopting this equipment intrinsic, guarantees material radial direction, hoop, axial three-dimensional motion, and form compound cycle and back and forth advance, continuous several times mixes, and reaches composition, the uniform object of component at short notice.Therefore, use this instrument can ensure the uniformity coefficient of powder high temperature spacer pad suspension stabilizer product.
Embodiment 1
Weighing 70 weight part attapulgites adds in CM500-II type powder mixer, open motor, be in 80r/min whipping process, slowly add 16 weight part temperature human relations glue, 3 weight part xanthan gum, 7 parts by wt NaCl and 4 weight account polyethylene alcohol successively at rotating speed, then blending bunker is closed, open high-speed stirring, rewinding puddle 4h under 160r/min after, is the high temperature spacer pad suspension stabilizer that the present embodiment prepares, is designated as sample I.
Embodiment 2
Weighing 62 parts by weight of bentonite adds in CM500-II type powder mixer, open motor, be in 80r/min whipping process, slowly add 18 weight part temperature human relations glue, 2 weight part xanthan gum, 10 weight part Repone K and 8 weight account polyethylene alcohol successively at rotating speed, then blending bunker is closed, open high-speed stirring, rewinding puddle 2h under 200r/min after, is the high temperature spacer pad suspension stabilizer that the present embodiment prepares, is designated as sample II.
Embodiment 3
Weighing 74 weight part attapulgites adds in CM500-II type powder mixer, open motor, be in 80r/min whipping process, slowly add 13 weight part temperature human relations glue, 5 weight part xanthan gum, 5 parts by wt NaCl and 3 weight part Natvosols successively at rotating speed, then blending bunker is closed, open high-speed stirring, rewinding puddle 3h under 190r/min after, is the high temperature spacer pad suspension stabilizer that the present embodiment prepares, is designated as sample III.
Embodiment 4
Weighing 67 weight part attapulgites adds in CM500-II type powder mixer, open motor, be in 80r/min whipping process, slowly add 20 weight part temperature human relations glue, 8 parts by wt NaCl and 5 weight account polyethylene alcohol successively at rotating speed, then blending bunker is closed, open high-speed stirring, rewinding puddle 2h under 220r/min after, is the high temperature spacer pad suspension stabilizer that the present embodiment prepares, is designated as sample IV.
Embodiment 5
Weighing 71 parts by weight of bentonite adds in CM500-II type powder mixer, open motor, be in 60r/min whipping process, slowly add 14 weight part temperature human relations glue, 5 weight part xanthan gum, 4 weight part Repone K and 6 weight part Walocel MT 20.000PVs successively at rotating speed, then blending bunker is closed, open high-speed stirring, rewinding puddle 1h under 240r/min after, is the high temperature spacer pad suspension stabilizer that the present embodiment prepares, is designated as sample V.
Prepare spacer pad by sample I ~ V and test the performance of this spacer pad
The general method being prepared spacer pad by inventive samples I ~ V is as follows: take the tap water of 100 weight parts in stirring arm cup, start motor under 200r/min, the sample I ~ V of 1 ~ 5 weight part to be slowly added to the water, high speed agitator stirs 30min with rotating speed 1400 ~ 2000r/min, high-density weighting material is added after stirring, after stirring 30min with 1400 ~ 2000r/min again, 0.1 ~ 0.2 parts by weight of phosphoric acid tri-n-butyl defoamer is added in system, 1min is stirred, stand for standby use with under 200 ~ 400r/min.Wherein, high-density weighting material mainly barite (4.2g/cm
3) or powdered iron ore (6.5g/cm
3), its dosage is determined according to spacer pad density.
The performance evaluation of spacer pad
Spacer pad density measurement carries out according to the test method specified in GB/T 19139-2003.The evaluation method of difference of densities and free liquid is spacer pad at the corresponding temperature after maintenance 1h, is placed in 250mL graduated cylinder, after leaving standstill 2h at the corresponding temperature, surveys spacer pad difference of densities and free liquid; If temperature is higher than 95 DEG C, then spacer pad is placed in Chandler 8040 type High Temperature High Pressure multiviscosity meter slurry cup, under corresponding high-temperature and high-pressure conditions after maintenance 1h, naturally cool to about 90 DEG C to pull down, spacer pad is placed in 250mL graduated cylinder and puts into 90 DEG C of water baths and leave standstill after 2h, survey its difference of densities and free liquid.
Embodiment 6
Take the tap water of 100 weight parts in stirring arm cup, start motor respectively the sample I of 0,0.5,1.0,1.5,2.0,2.5,3.0,3.5,4.0,4.5,5.0 weight parts to be slowly added to the water under 200r/min, high speed agitator stirs 30min with rotating speed 2000r/min, high-density weighting material is added after stirring, after stirring 30min with 2000r/min again, 0.2 parts by weight of phosphoric acid tri-n-butyl defoamer is added, to stir 1min under 400r/min to prepare density for 2.2g/cm in system
3serial spacer pad, wherein, high-density weighting material is respectively barite (4.2g/cm
3) or powdered iron ore (6.5g/cm
3), test the difference of densities of this serial spacer pad according to method mentioned above, wherein, probe temperature is 90 DEG C, and its measuring result is as shown in Figure 1.As can be seen from Figure 1, the difference of densities of spacer pad increases with suspension stabilizer dosage and reduces gradually, and when suspension stabilizer dosage reaches 3.0 weight parts and 4.0 weight part respectively, the density difference of spacer pad is less than 0.03g/cm
3, the requirement of well cementing operation to spacer pad stability can be met, and increase further along with dosage, the difference of densities of system can be down to 0g/cm
3, illustrate that high temperature suspension stabilizer of the present invention has good suspending stabilized performance.
Embodiment 7
Spacer pad compatibility test be according to 16.3 chapters and sections specified content of oil-well cement test method in GB/T 19139-2003 with after the mixing of different volumes ratio, carry out High Temperature High Pressure multiviscosisty test, to test the consistency of spacer pad and grout, drilling fluid.
The present invention is by the consistency of following experimental evaluation spacer pad.With formula be: 100 weight parts water+4 weight part high temperature suspension stabilizers (sample I ~ sample IV prepared by embodiment 1 ~ 4)+42.5 weight part barite+0.2 parts by weight of phosphoric acid tri-n-butyl defoamers, and prepare spacer pad to be evaluated according to general method prepared by above-mentioned spacer pad.Cement-slurry method is: (density is 1.30g/cm to G level silicate cement+10% micro-silicon+33% glass microballon+1.0% sulfonation aldehyde ketone polycondensate class dispersion agent+1.0% clay type high temp stablizer+3.0%AMPS class water retaining+1.0% polycarboxylic acid retarding agent+89% water
3); Drilling fluid is that Repone K gathers sulphur system, and its formula is: (drilling fluid density is 1.25g/cm to water+5.0% wilkinite+0.4% caustic soda+0.2% high molecular weight polyacrylamide+0.4% polyacrylic acid potassium+2.5% sulfonated phenol formaldehyde resin+2.5% sulfonated lignite resin+4.0% partially hydrolyzed polyacrylamide+4.0% potassium humate+4.5% Repone K+3.0% oxidized bitumen+0.3%RH-4 sanitising agent (Span-80, Tween-80 etc.)+46% limestone powder
3).
Test at 130 DEG C × 80MPa Water Under mud and grout respectively by above-mentioned testing method: spacer pad: drilling fluid volume is than being 1:1:1 and grout: consistency curve when spacer pad volume ratio is 7:3, its result respectively as shown in Figure 2, Figure 3, Figure 4, wherein Fig. 2 is the multiviscosisty curve of grout at 130 DEG C, and after arriving certain hour, denseness can in rising rapidly; Fig. 3, Fig. 4 are 130 DEG C of multiviscosisty curves of mixed stream, both contrasts can illustrate that cement slurry thickening time is without shortening phenomenon, and without unusual phenomenoies such as obvious thickening, flocculations in mixture and thickening, therefore, the chemical compatibility of the spacer pad containing this high temperature suspension stabilizer and drilling fluid, grout is good, also illustrates that the contamination resistance of the separating liquid system containing high temperature suspension stabilizer of the present invention is strong.
Embodiment 8
The sample I prepared for embodiment 1, by the formula in table 1, and prepares density 1.10g/cm by the above-mentioned general method preparing spacer pad
3~ 2.50g/cm
3serial spacer pad, test the method that this serial spacer pad specifies according to 12.6 chapters and sections of oil-well cement test method in GB/T19139-2003, wherein, the testing tool adopted is the fast rotational viscosimeter of ZNN-D6 six, and result is as shown in table 1.As can be seen from Table 1, density is at 1.10g/cm
3~ 2.50g/cm
3the spacer pad containing high temperature spacer pad suspension stabilizer of the present invention in scope all has good rheological property after 90 DEG C of maintenances.And along with the increase of high-density weighting material, spacer pad consistency change is little, and keeps good rheological property.Therefore, well cementation high temperature spacer pad suspension stabilizer of the present invention has good suspending power, and spacer pad increases the weight of scope can reach 1.10 ~ 2.50g/cm
3, spacer pad can realize turbulence replacement, to isolate drilling fluid and grout, raising efficiency of displacement, to wash away the borehole wall and casing wall, to guarantee cementing quality in well cementing process simultaneously.
Table 1
Note: liquidity index n=2.096 × lg (Φ
300/ Φ
100), consistency index k=0.511 × Φ
300/ 511
n.The test condition of rheological property is 90 DEG C of ordinary pressure curings.
Embodiment 9
In order to investigate the heat resistance of high temperature spacer pad suspension stabilizer of the present invention, with 1.30g/cm
3spacer pad is example, its stability in 30 ~ 150 DEG C of temperature ranges and rheological property are evaluated, result is as shown in table 2, wherein, the formula of spacer pad is: sample I ~ sample V+42.5 weight part barite+0.2 parts by weight of phosphoric acid tri-n-butyl defoamer that the embodiment 1 ~ 5 of 100 weight parts water+4 weight parts prepares, and is prepared obtains spacer pad I ~ spacer pad V according to above-mentioned spacer pad compound method.
Table 2
Note: liquidity index n=2.096 × lg (Φ
300/ Φ
100), consistency index k=0.511 × Φ
300/ 511
n.
As can be known from Table 2, at 30 ~ 150 DEG C of temperature, spacer pad I ~ V difference of densities is all less than 0.05g/cm
3, and without free liquid; And within the scope of 30 ~ 90 DEG C, the denseness of spacer pad has the trend of increase, improves its suspending power; Within the scope of 90 ~ 150 DEG C, although the denseness of spacer pad declines gradually by a small margin, still there is good rheological.In summary, the spacer pad of this density all has good rheological property and stability after maintenance at different temperatures, proves that well cementation high temperature spacer pad suspension stabilizer of the present invention has high-temperature stability.
The above is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, not departing from the scope of technical solution of the present invention, the technology contents of above-mentioned announcement can be utilized to make a little change or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. a well cementation high temperature spacer pad suspension stabilizer, it comprises the high molecular polymer of the clay material of 58 ~ 85 weight parts, the warm human relations glue of 8 ~ 20 weight parts, the xanthan gum of 0 ~ 5 weight part, the inorganic salt of 5 ~ 10 weight parts and 2 ~ 8 weight parts, described high molecular polymer comprise in polyvinyl alcohol, Walocel MT 20.000PV, Natvosol, hydroxypropyl starch ether one or more.
2. well cementation high temperature spacer pad suspension stabilizer according to claim 1, wherein, this well cementation high temperature spacer pad suspension stabilizer comprises the high molecular polymer of the clay material of 65 ~ 76 weight parts, the warm human relations glue of 13 ~ 17 weight parts, the xanthan gum of 2 ~ 4 weight parts, the inorganic salt of 6 ~ 8 weight parts and 3 ~ 6 weight parts.
3. well cementation high temperature spacer pad suspension stabilizer according to claim 2, wherein, this well cementation high temperature spacer pad suspension stabilizer comprises the high molecular polymer of the clay material of 70 ~ 76 weight parts, the warm human relations glue of 16 ~ 17 weight parts, the xanthan gum of 3 ~ 4 weight parts, the inorganic salt of 7 ~ 8 weight parts and 4 ~ 6 weight parts.
4. the high temperature spacer pad suspension stabilizer of the well cementation according to any one of claims 1 to 3, wherein, described clay material comprise in wilkinite, attapulgite, diatomite one or more; Described inorganic salt comprise sodium-chlor and/or Repone K.
5. the high temperature spacer pad suspension stabilizer of the well cementation according to any one of claims 1 to 3, wherein, described high molecular polymer is polyvinyl alcohol; Preferably, its polymerization degree is 1000 ~ 2000, and alcoholysis degree is 85% ~ 89%.
6. the high temperature spacer pad suspension stabilizer of the well cementation according to any one of claims 1 to 3, wherein, described clay material is attapulgite, and described inorganic salt are sodium-chlor, and described high molecular polymer is polyvinyl alcohol.
7. the preparation method of high temperature spacer pad suspension stabilizer of the well cementation according to any one of claim 1 ~ 6, described method comprises: added by described clay material in powder mixer, add described warm human relations glue, described xanthan gum, described inorganic salt and described high molecular polymer under agitation successively, after puddling, obtain described well cementation high temperature spacer pad suspension stabilizer.
8. the application in spacer pad prepared by the well cementation high temperature spacer pad suspension stabilizer according to any one of claim 1 ~ 6.
9. a high temperature resistant spacer pad, in the gross weight of this spacer pad for 100%, it contains the well cementation high temperature spacer pad suspension stabilizer that the well cementation high temperature spacer pad suspension stabilizer according to any one of claim 1 ~ 6 of 0.9% ~ 3.5% or the preparation method described in claim 7 obtain; Preferably, described high temperature resistant spacer pad comprises the water of 100 weight parts, the well cementation high temperature spacer pad suspension stabilizer of the described of 3 ~ 6 weight parts, the defoamer of 0.2 ~ 0.6 weight part, the high-density weighting material of 0 ~ 245 weight part; Preferably, described defoamer is tributyl phosphate; Described high-density weighting material is selected from barite and/or powdered iron ore.
10. the application of high temperature resistant spacer pad according to claim 9 in cementing operation; Preferably, described well is high temperature deep well, ultra deep well, high-angle wells and horizontal wells.
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| CN107915455A (en) * | 2017-10-20 | 2018-04-17 | 新疆维吾尔自治区煤田灭火工程局 | The compound outstanding sand agent of grout filling and its preparation and application |
| CN111518527A (en) * | 2019-10-12 | 2020-08-11 | 华南理工大学 | Elastic agent, preparation method thereof and casing expansion damage prevention elastic spacer fluid for well cementation |
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| CN114426816A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | High-temperature-resistant well cementation spacer fluid and preparation method and application thereof |
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| CN115772009A (en) * | 2021-09-07 | 2023-03-10 | 中国石油化工股份有限公司 | Suspension stabilizer and preparation method and application thereof |
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| WO2023245994A1 (en) * | 2022-06-22 | 2023-12-28 | 中国石油天然气集团有限公司 | Ultra-high-temperature-resistant cement slurry system for well cementation, and preparation method therefor and use thereof |
| CN115491187A (en) * | 2022-08-08 | 2022-12-20 | 成都理工大学 | Multifunctional rock-carrying anti-collapse engineering material and preparation method and application thereof |
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