CN111040747B - Long horizontal section horizontal well cementing curable pad fluid and application thereof - Google Patents
Long horizontal section horizontal well cementing curable pad fluid and application thereof Download PDFInfo
- Publication number
- CN111040747B CN111040747B CN201911201563.6A CN201911201563A CN111040747B CN 111040747 B CN111040747 B CN 111040747B CN 201911201563 A CN201911201563 A CN 201911201563A CN 111040747 B CN111040747 B CN 111040747B
- Authority
- CN
- China
- Prior art keywords
- parts
- cement
- oil well
- fluid
- pad fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/424—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells using "spacer" compositions
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
-
- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/426—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells for plugging
-
- 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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a curable pad fluid for cementing a long-horizontal-segment horizontal well, which belongs to the field of petroleum and natural gas exploration.
Description
Technical Field
The invention belongs to the field of petroleum and natural gas exploration, and particularly relates to a curable pad fluid for cementing a long horizontal section horizontal well and application thereof.
Background
The pad fluid is an important isolation protection slurry section between cement slurry and drilling slurry in well cementation construction, particularly in Changqing horizontal well solids, carbonaceous mudstone and a crack rock section are mixed due to discontinuous production layers, and the mudstone is easy to dissolve and creep when meeting low-solid phase spacer fluid, so that the safety of a horizontal section shaft is reduced, and the loss is easy to cause when meeting the crack rock section.
A curing material with potential curing characteristic is added into a traditional preposed liquid system, and an activator, a coagulation regulator, a dispersant and other additives and external admixtures are matched, so that the system has stronger comprehensive curing capability and improves the cementing quality of a horizontal well on the premise of having the effects of isolating and resisting pollution, but the density prepared by the system technology is 1.50-2.0g/cm 3 In the meantime.
In the process of implementing the embodiment of the invention, the inventor finds that at least the following defects exist in the background art:
the density of the prepared product prepared by the prior system technology is 1.50-2.0g/cm 3 The cement paste density of 1.35g/cm cannot be applied 3 In the following horizontal well with long horizontal section, the density of the prior art is 1.20g/cm 3 Left and right, and meets the requirements of mudstone inhibition and leakage prevention and stoppage.
Disclosure of Invention
The invention provides a curable pad fluid for cementing a long horizontal section horizontal well and application thereof, and aims to solve the problems and solve the problem that the density of the prepared pad fluid is 1.50-2.0g/cm in the prior system technology 3 The cement paste density of 1.35g/cm cannot be applied 3 In the following long horizontal section horizontal well, the density of 1.20g/cm is lacked in the prior art 3 And the problem of the prepad fluid which meets the mud rock inhibition and the leakage prevention and stopping performance is solved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the long horizontal section horizontal well cementing curable pad fluid consists of the following components in parts by mass:
20-30 parts of G-grade cement;
20-30 parts of closed-cell vitrified perlite;
30-40 parts of slag powder;
8-12 parts of micro silicon;
4-8 parts of calcined gypsum;
0.6-1.5 parts of sodium sulfate;
2-3 parts of quicklime;
2-3 parts of slaked lime;
2-3 parts of sodium metasilicate;
1-2 parts of sodium carbonate;
95.9 to 141.8 portions of water.
The additive also comprises an additive, wherein the additive consists of the following components:
2.0-3.5 parts of a fluid loss agent;
0.2-0.3 part of drag reducer;
0.15-0.4 part of retarder;
0.1-0.3 part of defoaming agent.
In the admixture:
the water loss reducing agent is specifically a polyvinyl alcohol oil well cement water loss reducing agent, the polyvinyl alcohol oil well cement water loss reducing agent is 2.5 parts, the drag reducer is specifically an aldehyde-ketone condensate oil well cement drag reducer, the aldehyde-ketone condensate oil well cement drag reducer is 0.15 part, the retarder is specifically a starch oil well cement retarder, the starch oil well cement retarder is 0.2 part, and the defoaming agent is 0.1 part.
In the admixture:
the water loss reducing agent is specifically a polyvinyl alcohol oil well cement water loss reducing agent, the polyvinyl alcohol oil well cement water loss reducing agent is 2.5 parts, the drag reducer is specifically an aldehyde-ketone condensate oil well cement drag reducer, the aldehyde-ketone condensate oil well cement drag reducer is 0.1 part, the retarder is specifically a starch oil well cement retarder, the starch oil well cement retarder is 0.1 part, and the defoaming agent is 0.1 part.
The additive comprises the following components:
the water loss reducer is specifically a polyvinyl alcohol oil well cement water loss reducer, the polyvinyl alcohol oil well cement water loss reducer is 2.5 parts, the drag reducer is specifically an aldehyde-ketone condensate oil well cement drag reducer, the aldehyde-ketone condensate oil well cement drag reducer is 0.15 part, the retarder is specifically a starch oil well cement retarder, the starch oil well cement retarder is 0.3 part, and the defoaming agent is 0.1 part.
The G-grade cement is 28 parts, the closed-cell vitrified perlite is 30 parts, the slag powder is 38 parts, the micro-silicon is 7 parts, the plaster of paris is 6 parts, the sodium sulfate is 1.2 parts, the quick lime is 3 parts, the slaked lime is 3 parts, the sodium metasilicate is 2 parts, the sodium carbonate is 2 parts, and the water is 128.614 parts.
The cement of G level is 25 parts, the obturator vitrified perlite is 25 parts, the slag powder is 30 parts, the micro-silicon is 10 parts, the plaster of paris is 5 parts, the sodium sulfate is 1 part, the quick lime is 2 parts, the slaked lime is 2 parts, the sodium metasilicate is 3 parts, the sodium carbonate is 1 part, the water is 112.35 parts.
The long horizontal section horizontal well cementing solidifiable pad fluid is applied to cementing construction in a low-pressure leakage-prone area near a wellhead at the temperature of 40-90 ℃.
The invention has the beneficial effects that the invention introduces the alkaline mudstone inhibitor, comprehensively utilizes the solid phase material and the related functional additive, and constructs the solidifiable preposed working fluid which can stabilize the mudstone stratum, has good compatibility with the drilling fluid and the cement slurry, has stable system per se and has the solidification characteristic; the use density is: 1.10- -1.20g/cm 3 The compressive strength at 45 ℃/48h is more than 3.5MPa; the density of the composite material meets the following requirements: the drilling fluid has the advantages that the drilling fluid density is higher than the front liquid density and lower than the cement slurry density, the curing capacity is realized on the premise of flushing and isolating, the technical means is added for continuously improving the cementing quality of the Changqing horizontal well, and meanwhile, less solid-phase materials are adopted, so that the mud rock inhibiting, leakage preventing, leakage stopping and curing performances are realized, and the cementing requirement of the complex long horizontal section well in the Changqing is met. Less solid phase materials are adopted, mud rock inhibition, leakage prevention, leakage stoppage and solidifiability are realized, and the well cementation requirement of complex long horizontal section wells in the celebration is met.
Drawings
FIG. 1 shows solidifiable performance test data in an embodiment of a long horizontal section horizontal well cementing solidifiable pad fluid of the present invention;
FIG. 2 is solidifiable performance test data in another embodiment of a long horizontal interval horizontal well cementing solidifiable pad fluid of the present disclosure;
FIG. 3 is solidifiable performance test data in an embodiment of the invention for cementing a solidifiable pad fluid in a long horizontal section horizontal well;
FIG. 4 is solidifiable performance test data in another embodiment of a long horizontal interval horizontal well cementing solidifiable pad fluid of the present disclosure;
FIG. 5 shows solidifiable performance test data in an embodiment of the invention for cementing a solidifiable pad fluid in a long horizontal section horizontal well;
FIG. 6 shows solidifiable performance test data in an embodiment of the long horizontal section horizontal well cementing solidifiable pad fluid of the present invention.
Detailed Description
In the following, many modifications and variations of the present invention based on the gist of the present invention will be apparent to those skilled in the art.
The preparation method of the pad fluid prepared in the laboratory is consistent with that of the common pad fluid. For the evaluation of the main properties, reference is made to the experimental data in the present application.
Example 1
According to one embodiment of the curable pad fluid for cementing a long-horizontal-section horizontal well, the curable pad fluid for cementing a long-horizontal-section horizontal well comprises the following components in parts by mass:
20-30 parts of G-grade cement;
20-30 parts of closed-cell vitrified perlite;
30-40 parts of slag powder;
8-12 parts of micro silicon;
4-8 parts of calcined gypsum;
0.6-1.5 parts of sodium sulfate;
2-3 parts of quicklime;
2-3 parts of slaked lime;
2-3 parts of sodium metasilicate;
1-2 parts of sodium carbonate;
95.9 to 141.8 portions of water.
In the embodiment, the prepad fluid has high solid-phase mud rock inhibition, certain leakage prevention and plugging capabilities, good isolation and well flushing effects can be achieved, the density of the prepad fluid is close to that of well completion slurry, pressure change is reduced, and safety of a horizontal section of a well bore is protected; the self-solidifying property is also provided, the length of the shaft sealing section can be further improved, and the functions of supporting and protecting the casing can be better realized.
The basic mudstone inhibitor is introduced into the prepad fluid formula, and a solid phase material and related functional additives are comprehensively utilized to construct the solidifiable prepad working fluid which can stabilize a mudstone stratum, has good compatibility with drilling fluid and cement slurry, is stable in self system and has solidification characteristics; the use density is: 1.10-1.20g/cm 3 The compressive strength at 45 ℃/48h is more than 3.5MPa; the density of the composite material meets the following requirements: the requirement that the density of the drilling fluid is more than the density of the pad fluid and less than the density of cement slurry is met, and the curing agent has the curing capability on the premise of having the functions of flushing and isolating, so that the technical means is added for continuously improving the cementing quality of the Changqing horizontal well.
The prepad fluid formula is mainly applied to cementing long horizontal section wells in Changqing oil and gas fields, and the working density of the system is as follows: 1.10-1.20g/cm 3 The density of the drilling fluid and cement paste is lower than that of the well completion drilling fluid and the cement paste, so that mudstone can be inhibited, and the safety of a horizontal section of a shaft can be protected; meanwhile, under the conditions of medium and low temperature near a well head, the coagulation strength is more than 3.5MPa/45 ℃/48h, the cement is particularly suitable for well cementation construction in low-pressure and easy-to-leak areas, the drilling fluid can be isolated from a well wall, the sealing rate can be improved, and the well cementation quality is ensured.
The main mineral composition of the carbonaceous mudstone is kaolin and montmorillonite, and other minerals include chlorite, quartz, halloysite, sericite and the like, which belong to silicalite and aluminate, and contain a large amount of Al 2 O 3 、SiO 2 The water absorption is strong; according to the mineral composition, the preposed liquid-solid phase material selects silicon and aluminate materials which are similar to the main components of the mudstone, the pH value is adjusted to be more than or equal to the value of the drilling fluid, the osmotic pressure is reduced, and the water absorption expansion and swelling of the mudstone are inhibited.
The newly formulated curable preflush is based on water base and has a density of: 1.10-1.20g/cm 3 The density of the drilling fluid is lower than that of the drilling fluid for well completion of the horizontal well, the n value is greater than 0.60, the K value is less than 0.5, the density is close to that of Newtonian fluid, the mud cake has good permeability, light-bead particles are added into the system, the flushing effect on the mud cake is improved, the six-speed rotation tester is used for testing, and the flushing of the drilling fluid is realizedThe effect is more than 90%, and the drilling fluid diluting effect is achieved; the main materials of the cement mortar are highly similar to the main low-density materials of light beads, slag and fly ash systems, and the cement mortar has small influence on the thickening time and strength of low-density cement mortar.
A plurality of solidifiable materials are adopted, the G-grade cement, slag powder plaster of paris and quick lime in the system are adopted, the solidifiable materials account for 56-81% of the solid phase content in the system, and the densities of the slag, the plaster of paris and the lime are lower than that of the cement, so that the system density is reduced while the strength is ensured.
By adopting a composite activation technology, the slag powder can be better activated to form strength only when the pH value is more than 13, but the G-grade cement can be quickly solidified under the strong alkali condition, so that a liquid time period required by the function of the system as the pad fluid cannot be provided; therefore, the activating agent is high-modulus sodium silicate which is not easy to dissolve in water, sodium carbonate and hydrated lime in a certain proportion are added, sodium hydroxide and calcium carbonate are generated through gradual reaction of the high-modulus sodium silicate and the hydrated lime, the temperature is gradually increased underground in a system, the high-modulus sodium silicate is activated by the gradually generated sodium hydroxide to form sodium silicate, the sodium silicate is used for activating slag, the later strength development is guaranteed, and the early liquid time is also considered.
By adopting a composite coagulation control technology, selecting a conventional cement paste system retarder aiming at cement components, adjusting the coagulation speed by adopting sulfate ions for slag materials, and adding a certain amount of cement paste into the mixed material to obtain the cement slurry, wherein the mixed material is prepared from the following components in percentage by weight: 1-13:1, and controlling the generation speed and concentration of sodium hydroxide by sulfate radicals to realize the control of the activation time of the system.
Example 2
Further, another embodiment of the well cementation curable pad fluid for the long horizontal section horizontal well of the invention further comprises an additive, wherein the additive comprises the following components:
2.0-3.5 parts of a fluid loss agent;
0.2-0.3 part of drag reducer;
0.15-0.4 part of retarder;
0.1-0.3 part of defoaming agent.
In the above embodiment, the combination ofAlleviate the stabilization technique, to achieve 1.20g/cm 3 The system density is as follows, 20% -25% of vitrified expanded perlite and 8% -12% of particle silicon powder are added into the system, and the selected solid-liquid ratio ranges are as follows: 1.05-1.20; under the condition of normal temperature, the system is stabilized by the action of cement, gypsum and silica fume combined with water molecules, the underground temperature rises along with the long time, and the system is maintained to be stable by the bonding force of slag, cement, lime and water activated by the chemical reaction of the admixture.
The solidifiable pad fluid can play a good role in isolating drilling fluid, protecting well walls and setting the solidifiable pad fluid per se within the temperature range of 40-90 ℃; meanwhile, the solidification time can be conveniently controlled, and the construction safety is ensured. Compared with the conventional pad fluid, the system can be better suitable for long horizontal section well cementation of the Changqing oil field, and the solid phase materials of cement, slag, gypsum and lime in the system have smaller influence on the performance of cement paste than calcium carbonate and barite in the conventional pad fluid; the system is water-based alkaline liquid, and compared with the traditional polymer colloid pre-solution, the efficiency of cleaning the virtual mud cake is better; the system has coagulability, and the support sleeve is coagulated in the shaft, so that the sealing length is increased. The method has higher practicability for horizontal well cementation which is easy to leak and has insufficient height, not only can increase the length of the long sealing section, but also can improve the construction safety.
Example 3
The following materials were:
25 portions of G-grade cement
25 parts of closed-cell vitrified perlite
30 portions of slag powder
5 portions of calcined gypsum
Sodium sulfate 1 part
2 portions of quicklime
3 portions of sodium metasilicate
Sodium carbonate 1 part
The solid phase material is uniformly stirred by a physical method, and only different amounts of retarder, fluid loss additive and drag reducer are needed to be added according to different well temperatures and well types, so as to adjust the solidified viscosity of the systemThe chemical conversion time is short; according to the size of the formation leakage equivalent, different water-solid ratios in the range are selected to form different system densities. The water-solid ratio is recommended to be used: 1.07, density: 1.14-1.17 g/cm 3 。
The application range of the admixture to water-solid ratio is as follows:
2.0 to 3.5 percent of fluid loss agent
Drag reducer 0.2-0.3%
0.15 to 0.4 percent of retarder
Water-solid ratio of 1.05-1.20
Density 1.06-1.17 g/cm 3
In the embodiment, the curable pad fluid for cementing a long horizontal section horizontal well is a key technology for improving the cementing quality of the oil and gas field horizontal well in the Changqing area, and according to the geological characteristics of an oil reservoir and the solution of the cementing problem of the long horizontal section well, the application range of the developed new system technology is determined as follows:
1. cementing a horizontal well of a long horizontal section oil well:
wellbore lower circulation temperature tolerance: 50 to 65 ℃;
wellbore upper static maintenance temperature: 30 to 45 ℃;
2. cementing a horizontal well of a long horizontal segment gas well:
wellbore lower circulation temperature tolerance: 70 to 85 ℃;
static maintenance temperature of upper part of shaft: 30 to 45 ℃.
The invention discloses isolation inhibition performance data of a curable pad fluid for cementing a long horizontal segment horizontal well, which comprises the following steps:
1. inhibiting clay slurrying ability
Adding bentonite into the prepared curable pad fluid, the conventional spacer fluid and clear water in several times, testing the rheological property of the stirred constant pressure thickener at 50 ℃/30min, and listing the viscosity values as follows:
table 1: experimental data sheet for inhibiting clay ability
It is apparent from the comparison of the data in the table above that the viscosity of the test system increases gradually as the addition of bentonite increases gradually, wherein the viscosity of the curable spacer fluid increases to the minimum extent, indicating that the curable spacer fluid has a more effective clay hydration dispersion inhibition capacity than the original spacer fluid system.
2. Mudstone inhibitive performance
Adding mudstone and rock debris (with the grain diameter of 2-4 mm) into the prepared curable pad fluid, the conventional spacer fluid and clear water in a plurality of times, stirring by a 50 ℃/30min normal pressure thickener, sieving by a sieve with the aperture of 0.45mm, drying, weighing, comparing the recovery rate, and listing the recovery rate values as follows:
table 2: experimental data table for recovery rate of mud rock debris
The data comparison in the table shows that the recovery data of the curable spacer fluid is obviously higher than that of other comparative fluids, which shows that the curable spacer fluid has good mudstone swelling inhibition performance and better mudstone section well wall protection capability.
Example 4
Further, referring to fig. 1 and fig. 2, the curable performance test data of the curable pad fluid for cementing a long-horizontal-section horizontal well of the present invention:
1、1.13-1.20 g/cm 3 settable pad fluid system performance (gas well use type 70-85 deg.C)
The formula is as follows: gegen grade G25% + curable prefluid material 75% + GJ-S2.5% + USZ0.15% + GH-3.2%
Water-cement ratio: 1.05
Density: 1.15g/cm 3 ×Φ4000×1
1.17g/cm 3 ×Φ4000×2
1.18g/cm 3 ×Φ2000×3
Water precipitation: less than 0.5 percent
Water loss: < 200ml
Strength: more than 2.5/3.5MPa (45 ℃/24h/48 h)
Thickening experimental conditions: 80 ℃/40MPa/40min
Initial thickening: 22Bc
Thickening time: t is t 40 /t 70 =189min/201min
The pulping rate is as follows: 1.80m 3 /t
Rheological data
n=0.5250
Pollution test
Curable pad fluid bulk sample: drilling fluid: release agent =7:2:1
Initial consistency: 18BC thickening time: not thickened in 240min
Wherein the solidifiable pad fluid material specifically comprises G-grade cement,
Closed cell vitrified perlite, slag powder, little silicon, plaster of paris, sodium sulfate, quick lime, hydrated lime, sodium metasilicate and sodium carbonate, G level cement is 25 parts, closed cell vitrified perlite is 25 parts, the slag powder is 30 parts, little silicon is 10 parts, the plaster of paris is 5 parts, the sodium sulfate is 1 part, quick lime is 2 parts, hydrated lime is 2 parts, sodium metasilicate is 3 parts, the sodium carbonate is 1 part, water is 112.35 parts.
The G level of the lovely city is specifically as follows: grade G well cement (HSR);
GJ-S is specifically as follows: polyvinyl alcohol oil well cement fluid loss agent;
the USZ is specifically: aldehyde ketone condensate oil well cement drag reducing agents;
GH-3 is specifically: starch oil well cement retarder.
Example 5
Further, referring to fig. 3 and 4, the solidifiable performance test data of the cementing solidifiable pad fluid of the long horizontal section horizontal well of the invention are as follows:
2、1.13-1.20 g/cm 3 curable pad fluid system properties (oil well type)55-60℃)。
(1) The formula is as follows: gegen grade G25% + curable relief additive 75% + GJ-S2.5% + USZ0.15% + GH-3.2%
Water-cement ratio: 1.05
Density: 1.13g/cm 3 ×Φ4000×1
1.15g/cm 3 ×Φ4000×2
1.17g/cm 3 ×Φ2000×3
Water precipitation: less than 0.5 percent
Water loss: < 200ml
Strength: more than 2.0/3.5MPa (45 ℃/24h/48 h)
Thickening experimental conditions: 55 deg.C/25 MPa/25min
Initial thickening: 12Bc
Thickening time: t is t 40 /t 70 =350min/383min
The pulping rate is as follows: 1.80m 3 /t
Rheological data
Pollution test
Curable pad fluid bulk sample: drilling fluid: release agent =7:2:1
Initial consistency: 22BC thickening time: not thick for 240min
The curable liquid is mixed with a horizontal well completion drilling fluid system in different proportions, and rheological parameters of the mixed liquid are measured after the curable liquid is fully stirred.
The solidifiable spacer fluid does not generate flocculation thickening phenomenon after being mixed with the drilling fluid in different proportions.
Wherein the solidifiable pad fluid material specifically comprises G-grade cement,
Closed cell vitrified perlite, slag powder, little silicon, plaster of paris, sodium sulfate, quick lime, hydrated lime, sodium metasilicate and sodium carbonate, G level cement is 25 parts, closed cell vitrified perlite is 25 parts, the slag powder is 30 parts, little silicon is 10 parts, the plaster of paris is 5 parts, the sodium sulfate is 1 part, quick lime is 2 parts, hydrated lime is 2 parts, sodium metasilicate is 3 parts, the sodium carbonate is 1 part, water is 112.35 parts.
The city G level is specifically: grade G well cement (HSR);
the GJ-S specifically comprises: polyvinyl alcohol oil well cement fluid loss agent;
the USZ is specifically: aldehyde ketone condensate oil well cement drag reducing agents;
GH-3 is specifically as follows: starch oil well cement retarder.
Example 6
Further, referring to fig. 5 and 6, the curable performance test data of the curable pad fluid for cementing a long-horizontal-section horizontal well of the present invention:
(2) the formula is as follows: gecheng grade G25% + curable relief additive material 75% + GJ-S2.5% + USZ0.10% + GH-3.1%; please refer to fig. 5;
water-cement ratio: 1.05
Density: 1.13g/cm 3 ×Φ4000×1
1.15g/cm 3 ×Φ4000×2
1.17g/cm 3 ×Φ2000×3
Water precipitation: less than 0.5 percent
Water loss: < 200ml
Strength: is more than 2.2/3.5MPa (45 ℃/24h/48 h)
Thickening experimental conditions: 55 deg.C/25 MPa/25min
Initial thickening: 15Bc
Thickening time: t is t 40 /t 70 =172min/196min
Slurry making rate: 1.80m 3 /t
(3) The formula is as follows: gecheng grade G25% + curable relief additive material 75% + GJ-S2.5% + USZ0.15% + GH-3.2%; please refer to fig. 6;
water-cement ratio: 1.05
Density: 1.17g/cm 3 ×Φ4000×1
1.19g/cm 3 ×Φ4000×2
1.19g/cm 3 ×Φ2000×3
Water precipitation: less than 0.5 percent
Water loss: < 200ml
Strength: is more than 2.4/3.8MPa (45 ℃/24h/48 h)
Thickening experimental conditions: 55 deg.C/25 MPa/25min
Initial thickening: 22Bc
Thickening time: t is t 40 /t 70 =248min/286min
Slurry making rate: 1.80m 3 /t
Wherein the solidifiable pad fluid material specifically comprises G-grade cement,
Closed cell vitrified perlite, slag powder, little silicon, plaster of paris, sodium sulfate, quick lime, hydrated lime, sodium metasilicate and sodium carbonate, G level cement is 25 parts, closed cell vitrified perlite is 25 parts, the slag powder is 30 parts, little silicon is 10 parts, the plaster of paris is 5 parts, the sodium sulfate is 1 part, quick lime is 2 parts, hydrated lime is 2 parts, sodium metasilicate is 3 parts, the sodium carbonate is 1 part, water is 112.35 parts.
The city G level is specifically: grade G well cement (HSR);
GJ-S is specifically as follows: polyvinyl alcohol oil well cement fluid loss agent;
the USZ is specifically: aldehyde ketone condensate oil well cement drag reducing agents;
GH-3 is specifically: starch oil well cement retarder.
Example 7
The invention discloses a preparation method of a well cementation curable pad fluid of a horizontal well with a long horizontal section, which comprises the following steps:
step 1, uniformly mixing 20-30 parts of G-grade cement, 20-30 parts of closed-cell vitrified perlite, 30-40 parts of slag, 8-12 parts of micro-silicon, 4-8 parts of plaster of paris, 0.6-1.5 parts of sodium sulfate, 2-3 parts of quicklime, 2-3 parts of slaked lime, 2-3 parts of sodium metasilicate and 1-2 parts of sodium carbonate;
and 2, adding 2.0-3.5 parts of fluid loss additive, 0.2-0.3 part of drag reducer, 0.15-0.4 part of retarder and 0.1-0.3 part of defoaming agent into the water added in the step 1, and uniformly mixing 95.9-141.8 parts of water to obtain the curable pad fluid for cementing the long-horizontal-section horizontal well.
In the embodiment, the micro silicon is powdery and is convenient to dissolve; the fluid loss agent can be G31S oil well cement fluid loss agent, G32S oil well cement fluid loss agent or G30S oil well cement instant fluid loss agent which are produced by Wei Hui chemical company Limited, the drag reducer can be anionic polyacrylamide drag reducer, the retarder can be Dewang brand sodium gluconate retarder, and the defoaming agent can be HS brand organic silicon defoaming agent.
Claims (6)
1. The long horizontal section horizontal well cementation curable pad fluid is characterized by consisting of the following components in parts by mass:
20-30 parts of G-grade cement;
20-30 parts of closed-cell vitrified perlite;
30-40 parts of slag powder;
8-12 parts of micro silicon;
4-8 parts of calcined gypsum;
0.6-1.5 parts of sodium sulfate;
2-3 parts of quicklime;
2-3 parts of slaked lime;
2-3 parts of sodium metasilicate;
1-2 parts of sodium carbonate;
95.9 to 141.8 portions of water;
the additive also comprises an additive, wherein the additive consists of the following components:
2.0-3.5 parts of fluid loss agent;
0.2-0.3 part of drag reducer;
0.15-0.4 part of retarder;
0.1-0.3 part of defoaming agent;
the curing pad fluid has the following using density: 1.10- -1.20g/cm 3 The compressive strength at 45 ℃/48h is more than 3.5MPa; the density of the composite material meets the following requirements: the requirement that the density of the drilling fluid is more than the front liquid density and less than the cement slurry density is met.
2. The long horizontal section horizontal well cementing curable pad fluid of claim 1, wherein in the admixture:
the water loss reducer is specifically a polyvinyl alcohol oil well cement water loss reducer, the polyvinyl alcohol oil well cement water loss reducer is 2.5 parts, the drag reducer is specifically an aldehyde-ketone condensate oil well cement drag reducer, the aldehyde-ketone condensate oil well cement drag reducer is 0.1 part, the retarder is specifically a starch oil well cement retarder, the starch oil well cement retarder is 0.1 part, and the defoaming agent is 0.1 part.
3. The long horizontal section horizontal well cementing curable pad fluid of claim 1, wherein in the admixture:
the water loss reducer is specifically a polyvinyl alcohol oil well cement water loss reducer, the polyvinyl alcohol oil well cement water loss reducer is 2.5 parts, the drag reducer is specifically an aldehyde-ketone condensate oil well cement drag reducer, the aldehyde-ketone condensate oil well cement drag reducer is 0.15 part, the retarder is specifically a starch oil well cement retarder, the starch oil well cement retarder is 0.3 part, and the defoaming agent is 0.1 part.
4. The long horizontal section horizontal well cementing curable pad fluid according to any one of claims 1 to 3, wherein the G-grade cement is 28 parts, the closed-cell vitrified perlite is 30 parts, the slag powder is 38 parts, the micro-silicon is 7 parts, the calcined gypsum is 6 parts, the sodium sulfate is 1.2 parts, the quick lime is 3 parts, the hydrated lime is 3 parts, the sodium metasilicate is 2 parts, the sodium carbonate is 2 parts, and the water is 128.614 parts.
5. The settable pad fluid for cementing in a long horizontal section horizontal well according to any one of claims 1 to 3, wherein the G-grade cement is 25 parts, the closed-cell vitrified perlite is 25 parts, the slag powder is 30 parts, the micro-silicon is 10 parts, the plaster of paris is 5 parts, the sodium sulfate is 1 part, the quicklime is 2 parts, the slaked lime is 2 parts, the sodium metasilicate is 3 parts, the sodium carbonate is 1 part, and the water is 112.35 parts.
6. The application of the long horizontal section horizontal well cementing solidifiable pad fluid in the well cementing construction of a low-pressure leakage-prone area near a wellhead at the temperature of 40-90 ℃ is disclosed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201563.6A CN111040747B (en) | 2019-11-29 | 2019-11-29 | Long horizontal section horizontal well cementing curable pad fluid and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201563.6A CN111040747B (en) | 2019-11-29 | 2019-11-29 | Long horizontal section horizontal well cementing curable pad fluid and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111040747A CN111040747A (en) | 2020-04-21 |
| CN111040747B true CN111040747B (en) | 2023-02-17 |
Family
ID=70233683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911201563.6A Active CN111040747B (en) | 2019-11-29 | 2019-11-29 | Long horizontal section horizontal well cementing curable pad fluid and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111040747B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112707709B (en) * | 2020-12-30 | 2023-02-17 | 中国石油天然气集团有限公司 | High-strength low-hydration-heat low-density cement slurry system for well cementation and preparation method thereof |
| CN113185957B (en) * | 2021-04-29 | 2023-05-09 | 中海油田服务股份有限公司 | Curable spacer fluid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321012A (en) * | 2016-09-20 | 2017-01-11 | 中国石油大学(华东) | Well cementation method and device for weakly consolidated formation |
| CN106928949A (en) * | 2017-02-21 | 2017-07-07 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of mud cake solidification Cementing system and preparation method thereof |
| CN107502322A (en) * | 2017-09-08 | 2017-12-22 | 中联煤层气有限责任公司 | One kind strengthens the preposition liquid system of coal seam felted |
| CN109896801A (en) * | 2019-04-15 | 2019-06-18 | 卫辉市化工有限公司 | A kind of NEW TYPE OF COMPOSITE lightening material low weight cement slurry and preparation method thereof |
| CN110257037A (en) * | 2019-06-28 | 2019-09-20 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of well cementation curable preposition liquid system and preparation method thereof |
-
2019
- 2019-11-29 CN CN201911201563.6A patent/CN111040747B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106321012A (en) * | 2016-09-20 | 2017-01-11 | 中国石油大学(华东) | Well cementation method and device for weakly consolidated formation |
| CN106928949A (en) * | 2017-02-21 | 2017-07-07 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of mud cake solidification Cementing system and preparation method thereof |
| CN107502322A (en) * | 2017-09-08 | 2017-12-22 | 中联煤层气有限责任公司 | One kind strengthens the preposition liquid system of coal seam felted |
| CN109896801A (en) * | 2019-04-15 | 2019-06-18 | 卫辉市化工有限公司 | A kind of NEW TYPE OF COMPOSITE lightening material low weight cement slurry and preparation method thereof |
| CN110257037A (en) * | 2019-06-28 | 2019-09-20 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of well cementation curable preposition liquid system and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111040747A (en) | 2020-04-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11932806B2 (en) | Passivated cement accelerator | |
| US9284224B2 (en) | Cement compositions and methods of using the same | |
| US5358049A (en) | Conversion of emulsion mud to cement | |
| EP2245106B1 (en) | Method of cementing in a subterraean formation with extended settable compositions comprising cement kiln dust | |
| NO324115B1 (en) | Solidifiable thixotropic compounds and methods for applying a plug, forming a plug and cementing a rudder into a borehole using these compounds | |
| US11242479B2 (en) | Geopolymer cement for use in subterranean operations | |
| CA2510951A1 (en) | Reactive sealing compositions for sealing hydrocarbon containing subterranean formations and methods | |
| US20090188670A1 (en) | Additives for High Alumina Cements and Associated Methods | |
| Cadix et al. | Cementing additives | |
| Al-Yami | An overview of different chemicals used in designing cement slurries for oil and gas wells | |
| CN111040747B (en) | Long horizontal section horizontal well cementing curable pad fluid and application thereof | |
| Al-Yami et al. | Chemical additives for oil well cementing | |
| US5370181A (en) | Anti gas-migration cementing | |
| CA2572658A1 (en) | Methods of reducing the impact of a formate-based drilling fluid comprising an alkaline buffering agent on a cement slurry | |
| AU2013313146B2 (en) | Cement compositions and methods of using the same | |
| CA2648747C (en) | Settable drilling fluids comprising cement kiln dust and methods of using them | |
| Bensted | Admixtures for oilwell cements | |
| WO2021061140A1 (en) | Phosphorylated amino polycarboxylic acid cement retarder | |
| CN109233766A (en) | A kind of high temperature resisting corrosion resisting low-density well cementing liquid and its compositions of additives and application | |
| US11773310B2 (en) | Accelerated cement composition for reducing corrosion of wellbore casings | |
| US11453816B2 (en) | Accelerated cement compositions and methods for treating lost circulation zones | |
| US20230129356A1 (en) | Enhanced Pozzolan For Using In Extended Life Cements | |
| CN116262656A (en) | Low-density cement paste for well cementation and preparation method thereof | |
| EP1945733B1 (en) | Settable spotting compositions comprising cement kiln dust and methods of using them | |
| NZ616315B2 (en) | Use of methylhydroxyethyl cellulose as cement additive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201125 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING Co. Address before: Company No. 151 Changqing building cementing Weiyang road 710021 Shaanxi city of Xi'an Province Applicant before: Changqing cementing company of CNPC Chuanqing Drilling Engineering Co.,Ltd. Applicant before: CHINA NATIONAL PETROLEUM Corp. Applicant before: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING Co. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |