CN103484087A - Viscoelastic well cementation packing material - Google Patents
Viscoelastic well cementation packing material Download PDFInfo
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- CN103484087A CN103484087A CN201310364352.0A CN201310364352A CN103484087A CN 103484087 A CN103484087 A CN 103484087A CN 201310364352 A CN201310364352 A CN 201310364352A CN 103484087 A CN103484087 A CN 103484087A
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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
- C09K8/42—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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
- C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof
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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
- C09K8/42—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
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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
- C09K8/42—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
- C09K8/48—Density increasing or weighting additives
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Abstract
The invention relates to a viscoelastic well cementation packing material. The viscoelastic well cementation packing material comprises the following components in percentage by mass: 20-82.5 percent of high molecular polymer main agent, 3-9 percent of cross-linking agent, 5-9 percent of flow state regulator, 0.5-1 percent of suspending agent, 0-49.5 percent of weighter and 0-22 percent of water. According to the viscoelastic well cementation packing material, the viscoelastic well cementation packing material can be formed underground to enhance the well cementation annular water channeling resistance capacity and improve the well cementation packing quality of oil and gas wells.
Description
Technical field
The present invention relates to field of oil drilling a kind of well cementation packer material used, is especially liquid during a kind of cementing operation, curing visco-elasticity well cementation packer material voluntarily after injection.
Background technology
Annular space channelling after well cementation is one of technical barrier of facing of current drilling engineering.It can cause can't realizing effective packing between stratum and sleeve pipe, causes layer cross flow or well head bleed air water, when serious, may cause full well to be scrapped.The quality of well cementing material packing performance directly affects the quality of down-hole annular packing ability.Yet, as current common well cementing material, oil well cement is a kind of gum material of the hydraulicity, there are the inherent defects such as porosity is high, volumetric shrinkage is large in Behavior of Hardened Cement Paste after solidifying, easily at its body or with the cementation interface place on sleeve pipe, stratum, produce micron-sized gap and crack, form small fluid-channeling channel, cause the annular space seal failure.Simultaneously, the collision made a trip in drilling process, the External Force Actings such as impact of perforation, the underground fluid of the reservoir pressure that Complex Blocks is higher and height active state, also easily, deformation quantity little Behavior of Hardened Cement Paste large to fragility causes expendable destruction, and then bring out the annular space channelling after well cementation, affect normal production of hydrocarbons and recovery ratio.
Summary of the invention
The invention reside in and overcome the problem existed in background technology, and a kind of visco-elasticity well cementation packer material is provided, this visco-elasticity well cementation packer material, can strengthen the anti-packing ability of altering of well cementation annular space, improved the well cementation pack quality of Oil/gas Well.
The present invention solves its problem and can reach by following technical solution: a kind of visco-elasticity well cementation packer material, its component and proportioning are as follows by mass percentage: high molecular polymer host 20-82.5%, linking agent 3-9%, fluidised form conditioning agent 5-9%, suspension agent 0.5-1%, weighting agent 0-49.5%, water 0-22%.
Starting material component and the mass ratio of described linking agent are: chromium propionate 0.5-1 part, 0.5 part of plumbous subacetate, 1 part of chromium acetate, 100 parts, water; Starting material component and the mass ratio of described fluidised form conditioning agent are: 100 parts of water glass, 100 parts, sodium-chlor, 50 parts of Virahols; Starting material component and the mass ratio of described suspension agent are: 100 parts of wilkinites, 50 parts of the high Polyanionic Celluloses of PAC-HV; Described weighting agent is G level high sulfate-resistant oil well cement; Described high molecular polymer host preparation process: (1) is placed in 100 parts of deionized waters by 2 parts of Xylo-Mucines in mass ratio, stirs 120-150min under room temperature to fully dissolving; (2) take 4 parts of acrylamides, 8 parts of vinylformic acid, 10 parts of acrylyl oxy-ethyl-trimethyl salmiacs and 0.5 part of methyl methacrylate and pour in 100 parts of deionized waters, under room temperature, stir 20-30min; (3) above-mentioned two groups of solution are moved in reactor, stir; (4), under tap water circulating cooling condition, with the sodium hydroxide solution of concentration 30%, the pH value is adjusted to 7; (5) pass into nitrogen and start heating, being warming up to 60 ℃ of temperature of reaction, continuing to stir 20min after homo(io)thermism; (6) add 0.05 part of initiator ammonium persulfate, insulation reaction 6-12h; (7) be cooled to room temperature, discharging is standby.
The density of described visco-elasticity well cementation packer material is 1.05-1.70 * 10
3kg/m
3, use temperature 20-80 ℃.
Visco-elasticity well cementation packer material, pass through surface graft modification, the functional group that will have reactive behavior is introduced the high molecular polymer main chain, make its active metallic ion three-dimensional space network structure regular as node is cross-linked into that can take in linking agent in the cross-linking and curing reaction process, and quality is pliable and tough, pressure-bearing deformation is large.The hydroxyl be rich on molecular chain, carboxyl and the amino polymkeric substance that makes have splendid water-retentivity and excellent sealing property; Simultaneously, these groups can also with the cationoid reaction of Behavior of Hardened Cement Paste and surface of stratum, make this material that good adhesion be arranged.Select inorganic salt and small molecule alcohol as the fluidised form conditioning agent, controlled the molecular chain amount of crimp, reduced the speed of reaction of active group.Use reaction temperature and organic crosslinking agent, solved the defect that the polymer materials degree of mobilization is little, gelation time is short, temperature influence is large.
By introduce micro-hydrophobic grouping on macromolecular main chain, improved its dispersiveness and stability in water; Add silicate in the fluidised form conditioning agent, controlled oil well cement the aquation process, reduced the degree of absorption of polymer molecule to cement granules, thereby solved the defect not good with the oil well cement consistency under the large dosage of polymkeric substance.
This visco-elasticity well cementation packer material and oil well cement paste are used in conjunction with, form the sandwich structure of similar " sandwich " in the well cementation annular space, with regard to being equivalent to, to hard crisp Behavior of Hardened Cement Paste, added efficient, pliable and tough sealing-ring.In underground working, along with the carrying out of crosslinking reaction, the molecular structure of this visco-elasticity well cementation packer material increases, viscosity increases, at first be viscous liquid state.Under the reservoir pressure effect, this material can be squeezed in the hole, tiny crack at Behavior of Hardened Cement Paste body and Behavior of Hardened Cement Paste-sleeve pipe, Behavior of Hardened Cement Paste-formation cementation interface, fills up above-mentioned defect.Now; the arrangement of liquid polymer molecule in narrow gap of thickness is tightr with proneness, accumulation degree; molecular motion not only will overcome friction resistance on contact surface; also to destroy the reactive forces such as Van der Waals force between polymer molecule, hydrogen bond; impel and change the required energy increase of molecular conformation, resist and alter the sealing property increase; the solid phase particles added in this visco-elasticity well cementation packer material also can be filled in slit surfaces or the inner bridge blinding that forms, and guarantees sealing.Further, after cross moulding, molecular structure marshalling, the densification of this visco-elasticity well cementation packer material, be the Hookean body state.Under the effect of reservoir pressure, this material can compress to the Behavior of Hardened Cement Paste at top and produce compressive set, utilizes its fine and close molecular structure to fill up sealing-gap everywhere, intercepts the seepage of resident fluid, guarantees sealing; The solid phase particles of material internal not only can improve the snappiness of high molecular polymer host, also can form " labyrinth " sealing effect, and then improves the packing ability of material monolithic.
In addition, the energy part that this visco-elasticity well cementation packer material also can rely on the viscoelastic deformation of polymkeric substance that the External Force Actings such as collision that make a trip are produced is converted into that thermal energy consumption dissipates, another part is stored up with the form of potential energy, shows the structural damping with good damping effect.Thereby, can be used as pliable and tough buffer area, reduce the transmission of bottom stress to this visco-elasticity well cementation packer material top, avoid the top water mudstone to suffer to destroy, guarantee its integrity and packing ability.
Liquid state, curable high molecular polymer that the present invention be take through surface graft modification are host, by introducing hydrophobic grouping, grinding and select organic crosslinking agent and high-efficiency fluid conditioning agent, extended set time, have improved the consistency with oil well cement and drilling fluid; By optimizing suspension agent and weighting agent proportioning, regulated density of material.The visco-elasticity that finally makes well cementation packer material, to the interlayer packing ability that improves the well cementation annular space, improve the oil gas well cementing operation quality, guarantee that the national energy strategic security has important practical significance and using value.
Embodiment:
Below in conjunction with specific embodiment, the invention will be further described:
With reference to standard GB/T/T19139-2003 " oil-well cement test method ", the traditional performance of this visco-elasticity well cementation packer material at different densities, different experiments temperature estimated.Main laboratory apparatus has: 30-60 type watt rib agitator, 7025 type High Temperature High Pressure multiviscosity meters, U.S. CHANDLER company; 35SA type rotational viscosimeter, U.S. Fann company.Simultaneously, adopt following method to alter the packing ability to material anti-and sedimentation stability is studied.
The anti-packing merit rating method of altering: to the well cementation packer material, anti-evaluation of altering the packing ability mainly take that the anti-has channeling of sample breaks through pressure reduction and penetration value is foundation.Sample to be tested is placed in rock core rubber clamper and is tested in GB GB/T19139-2003, ignored the fluid-channeling channel that on the annular space interface, micro-annulus causes.Therefore, for the actual condition at the lower pair interface of responsing well more truly, the present invention applies solid steel column (diameter 33.5mm, long 190.0mm) and is used in conjunction with dehydration cylinder (internal diameter 53.6mm, long 216.0mm, wall thickness 0.5mm), the annular space that simulation is comprised of 95/8 " sleeve pipe and 51/2 " sleeve pipe, thus the anti-packing ability of altering that comprises well cementing material under two effect of the interface factors is studied.Key step is, to the oil well cement that injects successively the high detected materials of oil well cement, 40mm that 30mm is high (this visco-elasticity well cementation packer material be mixed or with the oil well cement that compares sample), 30mm in above-mentioned annular space, form overall length 100mm sandwich structure, airtight rear immigration water-bath maintaining box; Under test temperature after the maintenance certain hour, alter medium from the pressurization of dehydration cylinder bottom with nitrogen for testing, the pressure reduction that the simulated oil gas well from bottom to top forms, press the speed persistent pressure of 0.1MPa/20s and (press sleeve pipe external diameter 139.7mm, bit diameter 215.9mm, the hole diameter amplification degree, by 5%, replaces discharge capacity 1.8m
3/ min calculates), every rising 0.5MPa voltage stabilizing 300s, until there is continuous air bubbles to emerge, has channeling pressure reduction now is the anti-breakthrough pressure reduction of altering.On this basis, the air outlet at dehydration cylinder top is connected with " ball " formula under meter, records gas flow, calculate the composite permeability K ' that comprises packer material under two interfacial states according to Darcy's law,
In formula:
K '---the composite permeability that comprises packer material under two interfacial states, μ m
2;
Q---gas flow, ml/s;
The viscosity of μ---gas, Pas;
L---sandwich structure total length, mm;
The cross-sectional area of A---sample, mm
2;
P
i---inlet pressure, MPa;
P
0---top hole pressure, MPa;
△ P---pressure reduction (P
i-P
0), MPa.
Except linking agent, other material in visco-elasticity well cementation packer material has formed the base fluid of this material, the testing method of base fluid stability: take required water by the different densities proportioning, use high speed agitator by the abundant aquation of suspension agent; Solution is moved in the slurry cup of watt woods agitator, add successively the materials such as high molecular polymer host, fluidised form conditioning agent under 3500 ± 500r/min, fully stir; The material made is poured in the 250ml graduated cylinder, put into the maintaining box that presets temperature after sealing, standing 24h, the density of testing respectively top and bottom slurry, bulk density is poor.
The treatment agent that following embodiment adopts is all commercially available, and wherein, drilling fluid is purchased from Beijing Zhongke Risheng Technology Co., Ltd. with the high Polyanionic Cellulose of PAC-HV.
Prepare each component:
Take in mass ratio 0.5 part of sour chromium, 0.5 part of plumbous subacetate, 1 part of chromium acetate, 100 parts of mixed preparing linking agents of water; Take 100 parts of water glass, 100 parts, sodium-chlor, 50 parts of mixed preparing fluidised form conditioning agents of Virahol; Take 100 parts of wilkinites, 50 parts of mixed preparing suspension agents of the high Polyanionic Cellulose of PAC-HV.
Prepare high molecular polymer host: (1) in mass ratio, is placed in 100 parts of deionized waters by 2 parts of Xylo-Mucines, stirs 120-150min under room temperature to fully dissolving; (2) take 4 parts of AM, 8 parts of AA, 10 parts of DAc and 0.5 part of MMA and pour in 100 parts of deionized waters, under room temperature, stir 20-30min; (3) above-mentioned two groups of solution are moved in reactor, and stir; (4), under tap water circulating cooling condition, with sodium hydroxide (NaOH) solution of concentration 30%, potential of hydrogen (pH value) is adjusted to 7; (5) pass into nitrogen (N
2) and start heating, be warming up to 60 ℃ of temperature of reaction, continue to stir 20min after homo(io)thermism; (6) add 0.05 part of initiator A PS, insulation reaction 6-12h; (7) be cooled to room temperature, discharging is standby.
Embodiment 1
Taking respectively 82.5g high molecular polymer host, 9g linking agent, 8.5g fluidised form conditioning agent, being configured to density is 1.05 * 10
3kg/m
3packer material, experimental result is in Table 1,2,3.
Embodiment 2
Take respectively polymkeric substance host 57g, fluidised form conditioning agent 7.7g, suspension agent 0.8g, linking agent 6g, water 9g, oil well cement 19.5g configuration, the mass ratio of liquid and oil well cement (liquid-solid ratio) is 4.13, and density is 1.20 * 10
3kg/m
3, experimental result is in Table 1,2.
Embodiment 3
Take respectively polymkeric substance host 20g, fluidised form conditioning agent 5g, suspension agent 0.5g, linking agent 3g, water 22g, oil well cement 49.5g configuration, the mass ratio of liquid and oil well cement (liquid-solid ratio) is 1.02, and density is 1.70 * 10
3kg/m
3, experimental result is in Table 1,2.
Comparative Examples 1
G level oil well cement paste: Dalian G level high sulfate-resistant oil well cement 69.4g, tap water 30.5g configuration, the mass ratio of water and oil well cement (liquid-solid ratio) is 0.44, density is 1.90 * 10
3kg/m
3, experimental result is in Table 1,2.
Comparative Examples 2
Drilling fluid system: emulsion polymer drilling fluid, wilkinite 4g wherein, soda ash 0.2g, tackifier 0.3g, fluid loss agent 1g, density 1.05 * 10
3kg/m
3, experimental result is in Table 3.
Table 1 embodiment and comparative example fundamental property are estimated
With Dalian G level oil well cement magma, compare, the degree of mobilization of material of the present invention good (24-27cm), the thickening time is long, can meet the needs of cementing operation; Free liquid is 0, and top and bottom density difference are little, is conducive to improve the packing ability of well cementation annular space.
The anti-packing merit rating of altering of table 2 material
* the safety experiment pressure of dehydration cylinder is 7MPa
# tests while altering pressure 7MPa, and voltage stabilizing 0.5h does not have bubble to overflow, do not occur has channeling
The anti-packing merit rating of altering finds, Dalian G level oil well cement anti-altered and broken through pressure reduction and composite permeability and improve with the rising of curing temperature, but the high resistance of 24h alters and break through pressure reduction and be no more than 0.50MPa, and composite permeability is high.After introducing the high material formation sandwich structure of the present invention of 40mm, under 80 ℃ of curing temperatures, 24h anti-altered and broken through pressure reduction and obviously improve with the increase of viscoelastic polymer host content in material of the present invention, maximum can be greater than 7MPa, and the comparable oil well cement of composite permeability reduces 1-2 the order of magnitude.Simultaneously, from embodiment 1, the anti-packing ability of altering of material of the present invention also can strengthen with the rising of curing temperature.
The Study on Compatibility of table 3 embodiment 1 and oil well cement, drilling fluid
As shown in Table 3, use by the graft modification to main polymer chain and fluidised form conditioning agent, improved the defect that the solid phase particles such as traditional polymer material and oil well cement, clay are easily reunited, difficulty is disperseed, improved consistency of the present invention, can guarantee that the safety of cementing operation is successfully carried out.
During use, according to reservoir pressure and the packing requirement for height of the required packing of cementing operation, determine density, the volume of preparation material of the present invention, and then calculate the corresponding quality of each component.Generally, the packing of down-hole material of the present invention height should be in the 40-200m scope.Therefore, can calculate the material volume that meets the cementing operation needs according to sectional area and the height indicator of mineshaft annulus.Wherein, the volume that the volume sum of viscoelastic polymer base fluid, fluidised form conditioning agent, suspension stabilizer, weighting agent and crosslinking agent is down-hole material of the present invention, the i.e. volume of visco-elasticity well cementation packer material.
Before cementing operation starts at the scene, linking agent is poured in other material of material of the present invention, with small-sized electric pump, puddled 10-15min.During construction, first in the well in operation annular space, inject a certain amount of oil well cement paste; Then, the material of the present invention configured in medicinal cupping car or pond with cementing truck with as the oil well cement of weighting agent, be mixed in proportion rear continuously, equably under Injection Well; Finally, a certain amount of oil well cement paste and follow-up clear water or drilling fluid reinject, the material of the present invention of injection and oil well cement are replaced to the predetermined position to the annular space of cementing the well, form " oil well cement-material-oil well cement of the present invention " sandwich structure after 200-260min, add the sealing-ring that 40-200m is high to the well cementation annular space, thus improve Oil/gas Well anti-ly alter the packing ability, improve cementing quality.
Claims (7)
1. visco-elasticity well cementation packer material, its component and proportioning are as follows by mass percentage: high molecular polymer host 20-82.5%, linking agent 3-9%, fluidised form conditioning agent 5-9%, suspension agent 0.5-1%, weighting agent 0-49.5%, water 0-22%.
2. a kind of visco-elasticity well cementation packer material according to claim 1, it is characterized in that: starting material component and the mass ratio of described linking agent are: chromium propionate 0.5-1 part, 0.5 part of plumbous subacetate, 1 part of chromium acetate, 100 parts, water.
3. a kind of visco-elasticity well cementation packer material according to claim 1, it is characterized in that: starting material component and the mass ratio of described fluidised form conditioning agent are: 100 parts of water glass, 100 parts, sodium-chlor, 50 parts of Virahols.
4. a kind of visco-elasticity well cementation packer material according to claim 1, it is characterized in that: starting material component and the mass ratio of described suspension agent are: 100 parts of wilkinites, 50 parts of the high Polyanionic Celluloses of PAC-HV.
5. a kind of visco-elasticity well cementation packer material according to claim 1, it is characterized in that: described weighting agent is G level high sulfate-resistant oil well cement.
6. a kind of visco-elasticity well cementation packer material according to claim 1, it is characterized in that: described high molecular polymer host preparation process: (1) is placed in 100 parts of deionized waters by 2 parts of Xylo-Mucines in mass ratio, stirs 120-150 min under room temperature to fully dissolving; (2) take 4 parts of acrylamides, 8 parts of vinylformic acid, 10 parts of acrylyl oxy-ethyl-trimethyl salmiacs and 0.5 part of methyl methacrylate and pour in 100 parts of deionized waters, stir 20-30 min under room temperature; (3) above-mentioned two groups of solution are moved in reactor, stir; (4), under tap water circulating cooling condition, with the sodium hydroxide solution of concentration 30%, the pH value is adjusted to 7; (5) pass into nitrogen and start heating, being warming up to 60 ℃ of temperature of reaction, continuing to stir 20 min after homo(io)thermism; (6) add 0.05 part of initiator ammonium persulfate, insulation reaction 6-12 h; (7) be cooled to room temperature, discharging is standby.
7. a kind of visco-elasticity well cementation packer material according to claim 1, it is characterized in that: the density of described visco-elasticity well cementation packer material is 1.05-1.70 * 10
3kg/m
3, use temperature 20-80 ℃.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106522876A (en) * | 2016-12-14 | 2017-03-22 | 中国石油大学(北京) | Cementing technique and well completion structure for shale gas well |
| CN106701047A (en) * | 2016-12-13 | 2017-05-24 | 长江大学 | Well-cementing waterproof gel |
| CN110699055A (en) * | 2019-10-28 | 2020-01-17 | 中国石油集团渤海钻探工程有限公司 | Plugging composition suitable for medium-small leakage plugging |
| CN111154467A (en) * | 2020-01-21 | 2020-05-15 | 中国石油化工股份有限公司 | Open hole section shaft treatment fluid and construction method thereof |
| CN112592703A (en) * | 2020-12-16 | 2021-04-02 | 湖南科技大学 | Elastic cementing breathable material for preventing and treating instability of hole wall of drilled hole and preparation method thereof |
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| CN101735784A (en) * | 2009-12-15 | 2010-06-16 | 中国科学院长春应用化学研究所 | High-strength oil well plugging colloid and preparation method |
| CN101880522A (en) * | 2010-06-12 | 2010-11-10 | 中国石油大学(华东) | Novel inorganic-organic ternary composite plugging agent for oil extraction and preparation method |
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| CN101735784A (en) * | 2009-12-15 | 2010-06-16 | 中国科学院长春应用化学研究所 | High-strength oil well plugging colloid and preparation method |
| CN101880522A (en) * | 2010-06-12 | 2010-11-10 | 中国石油大学(华东) | Novel inorganic-organic ternary composite plugging agent for oil extraction and preparation method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106701047A (en) * | 2016-12-13 | 2017-05-24 | 长江大学 | Well-cementing waterproof gel |
| CN106522876A (en) * | 2016-12-14 | 2017-03-22 | 中国石油大学(北京) | Cementing technique and well completion structure for shale gas well |
| CN110699055A (en) * | 2019-10-28 | 2020-01-17 | 中国石油集团渤海钻探工程有限公司 | Plugging composition suitable for medium-small leakage plugging |
| CN110699055B (en) * | 2019-10-28 | 2021-11-23 | 中国石油集团渤海钻探工程有限公司 | Plugging composition suitable for medium-small leakage plugging |
| CN111154467A (en) * | 2020-01-21 | 2020-05-15 | 中国石油化工股份有限公司 | Open hole section shaft treatment fluid and construction method thereof |
| CN111154467B (en) * | 2020-01-21 | 2022-07-01 | 中国石油化工股份有限公司 | Open hole section shaft treatment fluid and construction method thereof |
| CN112592703A (en) * | 2020-12-16 | 2021-04-02 | 湖南科技大学 | Elastic cementing breathable material for preventing and treating instability of hole wall of drilled hole and preparation method thereof |
| CN112592703B (en) * | 2020-12-16 | 2022-10-21 | 湖南科技大学 | Elastic cementing breathable material for preventing and treating instability of hole wall of drilled hole and preparation method thereof |
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|---|---|
| CN103484087B (en) | 2016-08-10 |
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