CN113845334B - Deep well broken formation borehole reinforcing agent and preparation method and application thereof - Google Patents
Deep well broken formation borehole reinforcing agent and preparation method and application thereof Download PDFInfo
- Publication number
- CN113845334B CN113845334B CN202010596999.6A CN202010596999A CN113845334B CN 113845334 B CN113845334 B CN 113845334B CN 202010596999 A CN202010596999 A CN 202010596999A CN 113845334 B CN113845334 B CN 113845334B
- Authority
- CN
- China
- Prior art keywords
- parts
- agent
- weight
- cement
- deep well
- 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
- 239000012744 reinforcing agent Substances 0.000 title claims abstract description 44
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000004568 cement Substances 0.000 claims abstract description 62
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 41
- 239000003822 epoxy resin Substances 0.000 claims abstract description 40
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 40
- 239000003623 enhancer Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000005553 drilling Methods 0.000 claims abstract description 22
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 16
- 239000003381 stabilizer Substances 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 9
- 239000012745 toughening agent Substances 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 16
- 238000005728 strengthening Methods 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000002270 dispersing agent Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 10
- 229920000642 polymer Polymers 0.000 claims description 8
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 7
- 229910052599 brucite Inorganic materials 0.000 claims description 7
- 239000004917 carbon fiber Substances 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000001804 emulsifying effect Effects 0.000 claims description 5
- 239000010881 fly ash Substances 0.000 claims description 5
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 5
- 239000005543 nano-size silicon particle Substances 0.000 claims description 5
- 239000003129 oil well Substances 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- IRLPACMLTUPBCL-KQYNXXCUSA-N 5'-adenylyl sulfate Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](COP(O)(=O)OS(O)(=O)=O)[C@@H](O)[C@H]1O IRLPACMLTUPBCL-KQYNXXCUSA-N 0.000 claims description 4
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 4
- 239000013530 defoamer Substances 0.000 claims description 4
- 239000000839 emulsion Substances 0.000 claims description 4
- 229920001732 Lignosulfonate Polymers 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims description 2
- 239000002114 nanocomposite Substances 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 23
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 9
- 235000019738 Limestone Nutrition 0.000 abstract description 2
- 239000006028 limestone Substances 0.000 abstract description 2
- 238000005755 formation reaction Methods 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 7
- 238000011160 research Methods 0.000 description 6
- 230000008719 thickening Effects 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000706 filtrate Substances 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000010428 baryte Substances 0.000 description 2
- 229910052601 baryte Inorganic materials 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229920006254 polymer film Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 238000007676 flexural strength test Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- -1 so that on one hand Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- C09K8/46—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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a deep well broken formation borehole reinforcing agent and a preparation method and application thereof, belonging to the technical field of drilling engineering. The deep well broken formation borehole reinforcing agent can comprise the following components in parts by weight: 100 parts of cement, 0-40 parts of high-temperature stabilizer, 5-35 parts of cementing agent, 6-35 parts of interface enhancer, 1-5 parts of toughening agent and 35-65 parts of water; wherein the cementing agent is prepared from components including powder nano rubber modified epoxy resin and an epoxy resin emulsifier. The well reinforcing agent is high in bonding strength with limestone, carbonate and other rocks after being cured, good in elastic toughness, and free of the problem of breakage and block falling after a drill rod collides, and meanwhile, the cementing agent disclosed by the invention can be cured under the environments of high temperature, high pressure, alkalinity and the like after being filtered to a stratum, so that the bonding strength and the rock integrity of deep broken stratum rocks are improved, the problem of drilling sticking complexity caused by collapse and block falling of the broken stratum can be solved, and the later-stage safe drilling is guaranteed.
Description
Technical Field
The invention relates to the technical field of drilling engineering, in particular to a deep well broken formation borehole reinforcing agent, and a preparation method and application thereof.
Background
With the gradual progress of exploration and development to deep ultra-deep layers, deep oil-gas reservoirs become important sites for increasing storage and production of oil companies at home and abroad, and in the process of deep drilling, great challenges are brought to engineering technology due to borehole instability caused by drilling in fractured strata. For example, in the northward block of the northwest oil field division of China petrochemical industry, due to the fact that the drill encounters deep (the well depth is 7000-8000m, the temperature is 140-170 ℃) dolomite and carbonate rock broken zones, collapse and block falling, frequent drill jamming and sidetracking are complex, the 5 wells lose a drilling period of over 900 days, and the world problem that the well wall of a broken stratum of a deep well and an ultra-deep well is unstable is not solved.
At present, aiming at the difficult problem of drilling in the fractured stratum of the ultra-deep well, the drilling fluid mainly depends on technical measures such as stress supporting, strengthening plugging, control sticking and cutting and the like, but the drilling fluid cannot effectively eradicate the drilling fluid to be complex and block dropping and drilling sticking sometimes occur. Thus, when a drill encounters a fracture zone and severely impacts the drilling, a plug of cement is typically backfilled and re-sidetracked, bypassing the fracture zone. But not only does this waste footage, it also increases the drilling cycle, and it is also possible to re-sidetrack the formation in the event of a broken formation. No suitable solution is available at present for the complex problem of drilling broken formations.
Chinese patent CN109207131A discloses a borehole wall repair reinforcing agent and a preparation method thereof, wherein a borehole wall broken stratum is repaired in a mode that an alkenyl monomer, a cross-linking agent and the like are polymerized to generate a polymer gel under the action of an initiator. However, the strength of the gel and the bonding strength with the carbonate rock interface are difficult to achieve the effect of the well wall reinforcer after solidification.
Chinese patent CN109423263A discloses a cement type borehole wall reinforcing agent and a preparation method thereof, wherein the problem that the broken stratum collapses and falls into blocks is solved mainly by using a mode that epoxy resin and a curing agent are cured under the condition of stratum temperature and pressure. The epoxy resin well wall reinforcing agent has high brittleness after being cured, and can possibly fall off or be damaged under the continuous collision of a drill rod.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a deep well broken formation borehole reinforcing agent. In particular to a deep well broken formation borehole reinforcing agent and a preparation method and application thereof.
The invention innovatively provides a method for solving the drilling problem of broken strata of deep wells by using a strong-adhesion high-elastic-toughness well bore reinforcing agent. The deep well broken formation borehole reinforcing agent overcomes the defects that the conventional cement has poor bonding property with carbonate rock, is hard and brittle after being cured, does not resist impact and cannot be used for reinforcing broken formation borehole walls.
The well bore reinforcing agent has high bonding strength with limestone, carbonate and other rocks after being cured, has good elastic toughness, and can not cause the problem of breakage and block falling after a drill rod collides.
One purpose of the invention is to provide a deep well broken formation borehole reinforcing agent, which comprises the following components in parts by weight:
100 parts of cement, namely 100 parts of cement,
0 to 40 parts of high-temperature stabilizer, preferably 15 to 35 parts,
5-35 parts of cementing agent, preferably 10-30 parts,
6-35 parts of an interface enhancer,
1-5 parts of toughening agent, preferably 1-3 parts,
35-65 parts of water.
Wherein the content of the first and second substances,
the cement can be formed by mixing oil well G-grade cement and superfine cement in a weight ratio of 1 (1-3); wherein the particle size of the superfine cement is less than 10 μm;
the toughening agent can be formed by mixing carbon fibers and brucite fibers in a weight ratio of 1 (1-5), wherein the length of the carbon fibers can be 1.5-3mm, and the length of the brucite fibers can be 1.5-5mm.
The cementing agent can be macromolecule nano composite emulsion, and is prepared from components including powder nano rubber modified epoxy resin and epoxy resin emulsifier. Specifically, the consolidating agent may be made by a method comprising the steps of: stirring the powder nano rubber modified epoxy resin and the epoxy resin emulsifier under a certain temperature condition, adding a certain amount of water, stirring and emulsifying to obtain the nano rubber modified epoxy resin.
Wherein the stirring temperature can be 45-65 ℃; the stirring speed can be 5000-10000r/min;
the powder nanometer rubber modified epoxy resin can be HH-080 (n) series products;
the epoxy resin emulsifier can be selected from at least one of K-5019 type aqueous epoxy resin emulsifier (e.g., guangzhou epoxy materials science and technology Co., ltd.), GL8661 epoxy resin emulsifier (e.g., guangzhou grand Ling trade Co., ltd.);
wherein, the powder nanometer rubber modified epoxy resin: epoxy resin emulsifier: the weight ratio of water can be 100 (5-30) to (40-90), preferably 100: (10-30): (50-80).
Preferably, the first and second electrodes are formed of a metal,
the deep well broken formation borehole reinforcing agent can also comprise a high-temperature stabilizing agent; the high temperature stabilizer may be used in an amount of 0 to 40 parts by weight, preferably 15 to 35 parts by weight, based on 100 parts by weight of the cement; the high-temperature stabilizer can be silicon dioxide powder with the purity of more than 98 percent and the particle size of 0.1-1um.
The deep well broken formation borehole reinforcing agent can also comprise a defoaming agent; the amount of the defoamer is 0.2-0.4 part by weight based on 100 parts by weight of the cement; the antifoaming agent may be selected from antifoaming agents commonly used in the art, preferably DZX antifoaming agents produced by the chinese petrochemical petroleum engineering technical research institute.
The deep well broken formation borehole reinforcing agent can also comprise a fluid loss additive; the filtrate reducer can be used in an amount of 1 to 5 parts by weight, preferably 1 to 2 parts by weight, based on 100 parts by weight of the cement; the fluid loss additive may be at least one selected from AMPS polymers, CMC (carboxymethyl cellulose) -based derivatives, or PVA (polyvinyl alcohol) -based polymers.
The deep well broken formation borehole reinforcing agent also comprises a dispersing agent; the dispersant may be used in an amount of 0.5 to 5 parts by weight, preferably 0.5 to 2 parts by weight, based on 100 parts by weight of the cement; the dispersant can be at least one selected from lignosulfonate, polycarboxylic acid water reducing agent or naphthalene dispersant.
The deep well broken formation borehole reinforcing agent can also comprise a retarder; the retarder can be used in an amount of 0-10 parts by weight, preferably 3-9 parts by weight, based on 100 parts by weight of the cement; the retarder can be at least one of AMPS polymer and hydroxycarboxylic acid retarder.
The deep well broken formation borehole reinforcing agent can also comprise an interface reinforcing agent; the interface enhancer may comprise interface enhancer A and interface enhancer B; the dosage of the interface enhancer A can be 5-25 parts by weight, preferably 10-20 parts by weight, and the dosage of the interface enhancer B can be 1-10 parts by weight, preferably 2-6 parts by weight, based on 100 parts by weight of the cement;
the interface enhancer A can be formed by mixing and compounding metakaolin, first-grade fly ash and slag according to the weight ratio of 1 (0.5-5) to (0.1-5), and the preferable weight ratio is 1 (0.5-3) to (0.1-2);
the interface enhancer B can be active nano silicon dioxide solution, the concentration of the active nano silicon dioxide can be 40-50wt%, and the average grain diameter is 1-80nm.
The deep well broken formation borehole reinforcing agent can also comprise a density regulator; the density modifier may be used in an amount of 0 to 200 parts by weight, based on 100 parts by weight of the cement. The density regulator can be a weighting agent or a lightening agent, and the weighting agent can be at least one of calcium carbonate, barite or iron ore powder; the lightening agent can be at least one of natural floating beads, hollow glass beads or polymer hollow beads.
The invention also aims to provide a preparation method of the deep well broken formation borehole reinforcing agent, which comprises the following steps:
and mixing and stirring the components including the cement, the high-temperature stabilizer, the cementing agent, the interface enhancer, the toughening agent and the water according to the using amount to obtain the deep well broken formation borehole reinforcing agent.
The vessel or mixing apparatus used in the preparation method of the present invention is a vessel or mixing apparatus generally used in the art.
The invention also aims to provide the application of the deep well broken formation borehole reinforcing agent in broken formation drilling.
The invention innovatively provides a method for repairing and bonding a broken stratum by using a high-bonding, high-elasticity and high-toughness borehole reinforcing agent, so that the integrity of rocks is improved, and the problem of drilling a broken stratum of a deep well is solved. After the wellbore strengthening agent reaches the fractured formation, under the action of the pressure difference, a part of the wellbore strengthening agent or filtrate enters the formation microcracks, and the majority of the wellbore strengthening agent or filtrate is left in the fractured formation wellbore. Under the temperature and pressure of the stratum, cement in the borehole reinforcing agent begins to hydrate, the powdered nano rubber modified epoxy resin emulsion in the cementing agent is demulsified due to the reduction of the free water content to form a polymer film, and the powdered nano rubber modified epoxy resin can be gradually cured under the conditions of high temperature, high pressure and strong alkali, so that on one hand, pores in cement can be filled, on the other hand, the powdered nano rubber modified epoxy resin can be gathered on the surfaces of cement, fibers and small particles of an interface reinforcing agent to form the polymer film, and the compatibility and the adhesion of the small particles, the fibers and a cement matrix are enhanced. Finally, a film formed by the epoxy resin is bonded with particles in hydration products, fibers and interface reinforcers of the cement, a continuous compact three-dimensional network structure is formed in a three-dimensional space, the mechanical properties of the consolidation body, such as tensile strength, bending resistance and elasticity, can be improved, and the drill rod is guaranteed not to be damaged when colliding; the interface reinforcer in the well bore reinforcer contacted with the rock surface can be activated in an alkaline environment to solidify mud cakes remained on the well wall, the epoxy resin and the active nano silicon dioxide can be adsorbed on the rock surface and the surface of the solidified mud cakes, and the adhesive capacity of a consolidation substance and stratum rock can be improved after the solidification; meanwhile, the well bore reinforcing agent entering the microcracks can be cured under the conditions of temperature, pressure and alkalinity to bond the microcracks, and the integrity and cohesion of the broken rock are improved.
1. The cementing capability of the conventional cement paste and the broken formation is poor, while the cementing strength of the borehole reinforcing agent of the invention after being cured and the carbonate rock of the broken formation is high, and the shear strength can be improved by 134.8 percent.
2. The borehole reinforcing agent can not be influenced by mud cakes on the borehole wall to the bonding effect, and the shear strength of the borehole reinforcing agent can be improved by 358.3 percent after the borehole reinforcing agent and the carbonate rock containing the mud cakes are solidified together.
3. The micro-cracks of the broken stratum are small in size, conventional cement cannot enter easily, the wellbore strengthening agent can enter the micro-cracks of the broken stratum and be solidified, and the cohesion and the integrity of rock of the broken stratum are improved; experimental research using displacement shows that the borehole reinforcing agent can enter micro cracks and be cured, and the cured compressive strength of the core can be improved by 277.4%.
4. After being solidified, the drill rod has certain elastic toughness, and the drill rod cannot be broken when being collided. In the drilling process, the drill rod can collide with cement, the cement is easy to fall off blocks and block, and high requirements are put forward on the strength, toughness and brittleness of the cement, but the well hole reinforcing agent has good elastic toughness, the breaking strength can be improved by 70.6%, the tensile strength can be improved by 80.2%, and the elastic modulus can be reduced by 61.4%.
5. The borehole reinforcing agent can solve the problem that collapse and block falling are complex in the drilling process of deep wells and ultra-deep wells in broken stratums, and ensures safe drilling in the later period.
Detailed Description
While the present invention will be described in detail with reference to the following examples, it should be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the present invention.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
Source of raw materials
Ultra-fine cement: zhengzhou De ze run building materials Co., ltd, particle size less than 10um;
powder nano rubber modified epoxy resin: HH-080 (n) series products, shanxi Macro science and technology Limited in Shenzhen;
epoxy resin emulsifier: k-5019 type waterborne epoxy resin emulsifier manufactured by Guangzhou epoxy materials science and technology Limited, GL8661 epoxy resin emulsifier manufactured by Guangzhou geling trade Limited;
high-temperature stabilizer: silicon dioxide powder with purity of more than 98 percent and particle size of 0.1-1um, china petrochemical petroleum engineering technical research institute;
interface reinforcing agent B: active nano silicon dioxide with the average particle size of 1-80nm, china petrochemical petroleum engineering technical research institute;
retarder: DZH-2 produced by the institute of petroleum engineering and technology in China petrochemical industry.
Test method
(1) The cement paste performance test method comprises the following steps: the elastic modulus test method is the international standard iso.jis.astm.din;
(2) The compression strength test method is the international standard ASTM C-348-86;
(3) The tensile strength test method is international standard API 102B;
(4) The flexural strength test method is referred to standard SY/T5546-92;
(5) The shear strength test method refers to a study on the well cementation two-interface mud cake activation mechanism of a Master academic paper of China geological university, the used simulated underground shaft is made of carbonate outcrop, and the shear strength is used for representing the bonding strength of the well bore reinforcing agent and the well wall (no mud cake on the well wall and mud cake on the well wall).
(6) The method for testing the compressive strength of the core refers to the national standard GB/T50266-99, the bonding strength of the borehole reinforcing agent entering the deep part of the fractured formation is represented by testing the compressive strength of the core curing, and the method for testing the compressive strength of the core curing comprises the following steps: standard coring (2.5 x 5 cm) of carbonate rock outcrop, measuring uniaxial compressive strength by using a rock mechanical testing machine, and selecting a rock core with equivalent compressive strength to perform the following comparative test. And putting the damaged rock core into a rock core holder, setting the confining pressure to be 10MPa, injecting a borehole reinforcing agent into the damaged rock core, curing for 20 days at the temperature of 170 ℃, and measuring the compressive strength again to obtain the cured compressive strength of the rock core.
Example 1
Step 1: preparing a cementing agent: heating 100g of powdered nano rubber modified epoxy resin HH-0801 to 50 ℃, adding 10g K-5019 type aqueous epoxy resin emulsifier into the epoxy resin, stirring for 5min, slowly adding water during stirring, adjusting the rotating speed to 6000r/min, continuously adding water into the system, wherein the total addition of the water is 50g, and stirring and emulsifying to obtain the cementing agent.
Step 2: preparing an interface enhancer A: weighing 10g of first-grade fly ash, 10g of slag and 10g of metakaolin, and uniformly mixing to obtain the interface enhancer A.
And step 3: weighing 50 parts by weight of oil well G-grade cement, 50 parts by weight of superfine cement, 35 parts by weight of high-temperature stabilizer, uniformly stirring, adding 45 parts by weight of water, stirring, respectively adding 1 part by weight of JJ-06 filtrate reducer produced by Hebei Polygold new material science and technology Limited, 1 part by weight of SMS-19 type dispersant produced by China petrochemical engineering institute, 3.5 parts by weight of retarder, 0.2 part by weight of DZX defoamer produced by China petrochemical engineering research institute, 10 parts by weight of cementing agent, 10 parts by weight of interface enhancer A, 3 parts by weight of interface enhancer B, 0.5 part by weight of carbon fiber with the length of 2mm and 2 parts by weight of brucite fiber with the length of 3mm, uniformly stirring, measuring the density of cement slurry, and pouring the cement slurry into a mold for molding to obtain the cement.
The density of the prepared cement paste is 1.83g/cm 3 The thickening time is 8.1h under the environment of 150 ℃ and 80 MPa. Curing for 72 hours, and measuring the elastic modulus to be 3.4GPa, the compressive strength to be 28.5MPa, the tensile strength to be 5.1MPa and the breaking strength to be 4.3MPa.
Comparative example 1
The procedure conditions and components were the same as in example 1 except that no binder was added.
The density of the prepared cement paste is 1.85g/cm 3 The thickening time is 9h under the environment of 150 ℃ and 80 MPa. Curing for 72 hours, and measuring the elastic modulus to be 8.8GPa, the compressive strength to be 22.2MPa, the tensile strength to be 2.83MPa and the breaking strength to be 2.52MPa.
Compared with the comparative example 1, the elastic modulus of the cement stone is reduced by 61.4%, the tensile strength is improved by 80.2%, and the flexural strength is improved by 70.6% in the example 1.
Example 2
Step 1: preparing a cementing agent: heating 100g of powdered nano rubber modified epoxy resin HH-0802 to 65 ℃, adding 30g of GL8661 aqueous epoxy resin emulsifier into the epoxy resin, stirring for 5min, slowly adding water during stirring, adjusting the rotating speed to 8000r/min, continuously adding water into the system, wherein the total addition of the water is 60g, and stirring and emulsifying to obtain the cementing agent.
Step 2: preparing an interface enhancer A: weighing 20g of first-grade fly ash, 5g of slag and 10g of metakaolin, and uniformly mixing to obtain the interface enhancer A.
And step 3: weighing 50 parts by weight of oil well G-grade cement, 50 parts by weight of superfine cement, 30 parts by weight of high-temperature stabilizer and 30 parts by weight of hollow glass microspheres, uniformly stirring, adding 50 parts by weight of water, stirring, respectively adding 1.5 parts by weight of a Pasteur Polytrol FL 32 dispersion type filtrate reducer, 2 parts by weight of an SXY-2 type dispersing agent, 7 parts by weight of a retarder, 0.3 part by weight of a DZX defoaming agent, 30 parts by weight of a cementing agent, 20 parts by weight of an interface enhancer, 5 parts by weight of an interface enhancer B, 0.4 part by weight of carbon fiber with the length of 3mm and 1 part by weight of brucite fiber with the length of 2mm, uniformly stirring, measuring the density of cement slurry, and pouring the cement slurry into a mold for molding to obtain the cement.
The density of the prepared cement paste is 1.53g/cm 3 The thickening time is 6.8h under the environment of 160 ℃ and 95 MPa. Maintaining for 72 hours, measuring the elastic modulus to be 3.2GPa, the compressive strength to be 26.9MPa, the tensile strength to be 4.5MPa, the breaking strength to be 4.0MPa, the shearing strength to be 3.1MPa without mud cake on the well wall, and the shearing strength to be 2.2MPa with mud cake on the well wall.
Comparative example 2
The process conditions and composition were the same as in example 2 except that the interfacial enhancer A, B was not added.
The density of the prepared cement paste is 1.51g/cm 3 The thickening time is 7.1h under the environment of 160 ℃ and 85 MPa. Maintaining for 72 hours, measuring the elastic modulus to be 3.2GPa, the compressive strength to be 23.5MPa, the tensile strength to be 4.3MPa, the breaking strength to be 4.2MPa, the shearing strength to be 1.32MPa without mud cake on the well wall, and the shearing strength to be 0.48MPa with mud cake on the well wall.
Compared with the comparative example 2, the shear strength of the well wall without the mud cake is improved by 134.8 percent, and the shear strength of the well wall with the mud cake is improved by 358.3 percent, which shows that the interface reinforcing agent has good interface bonding performance.
Example 3
Step 1: preparing a cementing agent: heating 100g of powdered nano rubber modified epoxy resin HH-0804 to 45 ℃, adding 20g of GL8661 aqueous epoxy resin emulsifier into the epoxy resin, stirring for 5min, slowly adding water during stirring, adjusting the rotating speed to 10000r/min, continuously adding water into the system, wherein the total addition of the water is 80g, and stirring and emulsifying to obtain the cementing agent.
Step 2: preparing an interface enhancer A: weighing 5g of first-grade fly ash, 5g of slag and 10g of metakaolin, and uniformly mixing to obtain the interface enhancer A.
And step 3: weighing 50 parts by weight of oil well G-grade cement, 50 parts by weight of superfine cement, 20 parts by weight of high-temperature stabilizer and 45 parts by weight of barite, uniformly stirring, adding 55 parts by weight of water, stirring, and respectively adding 1.5 parts by weight of PFL-L fluid loss additive produced by China petrochemical engineering technical research institute, 1 part by weight of USZ dispersant produced by chemical Limited company of Henan Wei Dynasty, 9 parts by weight of retarder, 0.4 part by weight of DZX defoamer, 15 parts by weight of cementing agent, 15 parts by weight of interface enhancer A, 3 parts by weight of interface enhancer B, 0.8 part by weight of carbon fiber with the length of 2mm and 1 part by weight of brucite fiber with the length of 1.5mm, and stirring. The density of the prepared cement paste is 2.21g/cm 3 And the thickening time is 5.3h under the environment of 170 ℃ and 100 MPa. The solidified compressive strength of the core is 19.4MPa.
Comparative example 3
The procedure conditions and components were the same as in example 3 except that no binder was added.
The density of the prepared cement paste is 2.20g/cm 3 The thickening time is 5.2h under the environment of 170 ℃ and 100MPa, and the solidified compressive strength of the rock core is 5.14MPa.
Example 3 the cured compressive strength of the core increased 277.4% relative to comparative example 3 due to the superior effect that the cement could enter the microcracks and cure.
Claims (10)
1. The deep well broken formation borehole reinforcing agent comprises the following components in parts by weight:
100 parts of cement, namely 100 parts of cement,
0-40 parts of a high-temperature stabilizer,
5-35 parts of cementing agent,
6-35 parts of an interface enhancer,
1-5 parts of a toughening agent,
35-65 parts of water;
wherein, the first and the second end of the pipe are connected with each other,
the cementing agent is prepared from components including powder nano rubber modified epoxy resin and an epoxy resin emulsifier; the cementing agent is macromolecular nano composite emulsion; the cementing agent is prepared by a method comprising the following steps: stirring the powdery nano rubber modified epoxy resin and an epoxy resin emulsifier, adding water, and stirring and emulsifying to obtain the modified epoxy resin emulsion; the powder nano rubber modified epoxy resin: epoxy resin emulsifier: the weight ratio of water is 100 (5-30) to 40-90;
the interface enhancer comprises an interface enhancer A and an interface enhancer B; based on 100 parts by weight of cement, 5-25 parts by weight of interface enhancer A and 1-10 parts by weight of interface enhancer B;
the interface enhancer A is prepared by mixing and compounding metakaolin, first-grade fly ash and slag according to the weight ratio of 1 (0.5-5) to 0.1-5;
the interface enhancer B is an active nano silicon dioxide solution, and the average particle size is 1-80nm.
2. The deep well fractured formation wellbore strengthening agent of claim 1, wherein:
in the preparation method of the cementing agent, the stirring temperature is 45-65 ℃.
3. The deep well fractured formation wellbore strengthening agent of claim 1, wherein:
the high-temperature stabilizer is silicon dioxide powder with the purity of more than 98 percent and the particle size of 0.1-1um.
4. The deep well fractured formation wellbore strengthening agent of claim 1, further comprising an antifoaming agent;
the dosage of the defoamer is 0.2-0.4 part by weight based on 100 parts by weight of the cement.
5. A deep well fractured formation wellbore strengthening agent according to claim 1, further comprising a fluid loss additive;
the dosage of the fluid loss additive is 1-5 parts by weight based on 100 parts by weight of the cement;
the fluid loss additive is selected from at least one of AMPS polymer, CMC derivative or PVA polymer.
6. A deep well fractured formation wellbore strengthening agent according to claim 1, further comprising a dispersant;
the dosage of the dispersant is 0.5 to 5 weight parts based on 100 weight parts of the dosage of the cement;
the dispersing agent is at least one selected from lignosulfonate, polycarboxylic acid water reducing agent or naphthalene dispersing agent.
7. The deep well fractured formation wellbore strengthening agent of claim 1, further comprising a retarder;
the amount of the retarder is 0-10 parts by weight based on 100 parts by weight of the cement;
the retarder is at least one of AMPS polymer and hydroxycarboxylic acid retarder.
8. The deep well fractured formation wellbore strengthening agent of claim 1, wherein:
the cement is formed by mixing oil well G-grade cement and superfine cement in a weight ratio of 1 (1-3); wherein the particle size of the superfine cement is less than 10 μm;
and/or the presence of a gas in the gas,
the toughening agent is formed by mixing carbon fibers and brucite fibers in a weight ratio of 1 (1-5), wherein the length of the carbon fibers is 1.5-3mm, and the length of the brucite fibers is 1.5-5mm.
9. The method of preparing a deep well fracture formation wellbore strengthening agent of any of claims 1~8, comprising the steps of:
and mixing and stirring the components including the cement, the high-temperature stabilizer, the cementing agent, the interface enhancer, the toughening agent and the water according to the using amount to obtain the deep well broken formation borehole reinforcing agent.
10. Use of a deep well fracture formation wellbore strengthening agent according to any one of claims 1~8 or made according to the method of claim 9 in fracturing formation drilling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010596999.6A CN113845334B (en) | 2020-06-28 | 2020-06-28 | Deep well broken formation borehole reinforcing agent and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010596999.6A CN113845334B (en) | 2020-06-28 | 2020-06-28 | Deep well broken formation borehole reinforcing agent and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113845334A CN113845334A (en) | 2021-12-28 |
| CN113845334B true CN113845334B (en) | 2023-02-28 |
Family
ID=78972536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010596999.6A Active CN113845334B (en) | 2020-06-28 | 2020-06-28 | Deep well broken formation borehole reinforcing agent and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113845334B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724368A (en) * | 2009-11-24 | 2010-06-09 | 烟台德邦科技有限公司 | Anti-impact epoxy structural rubber and preparation method thereof |
| CN102698669A (en) * | 2012-05-07 | 2012-10-03 | 中国人民解放军装甲兵工程学院 | Method for preparing organic nanometer rubber particle enhanced epoxy resin self-repairing microcapsule |
| CN102994059A (en) * | 2012-12-18 | 2013-03-27 | 中国石油化工股份有限公司 | Low-density cement slurry |
| CN104371678A (en) * | 2014-11-06 | 2015-02-25 | 中国石油天然气集团公司 | Expanded flexible well cementing grout and preparation method thereof |
| CN106244124A (en) * | 2016-07-29 | 2016-12-21 | 中国石油集团渤海钻探工程有限公司 | Anti-salt high-density high-early strength anti-migration oil well cement paste |
| CN109868125A (en) * | 2017-12-04 | 2019-06-11 | 中国石油化工股份有限公司 | A kind of deep drilling well high bearing strength sealing agent and preparation method thereof |
| CN110937857A (en) * | 2018-09-21 | 2020-03-31 | 中国石油化工股份有限公司 | High-temperature-resistant anti-channeling emulsion elastic and tough cement slurry and preparation method thereof |
-
2020
- 2020-06-28 CN CN202010596999.6A patent/CN113845334B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101724368A (en) * | 2009-11-24 | 2010-06-09 | 烟台德邦科技有限公司 | Anti-impact epoxy structural rubber and preparation method thereof |
| CN102698669A (en) * | 2012-05-07 | 2012-10-03 | 中国人民解放军装甲兵工程学院 | Method for preparing organic nanometer rubber particle enhanced epoxy resin self-repairing microcapsule |
| CN102994059A (en) * | 2012-12-18 | 2013-03-27 | 中国石油化工股份有限公司 | Low-density cement slurry |
| CN104371678A (en) * | 2014-11-06 | 2015-02-25 | 中国石油天然气集团公司 | Expanded flexible well cementing grout and preparation method thereof |
| CN106244124A (en) * | 2016-07-29 | 2016-12-21 | 中国石油集团渤海钻探工程有限公司 | Anti-salt high-density high-early strength anti-migration oil well cement paste |
| CN109868125A (en) * | 2017-12-04 | 2019-06-11 | 中国石油化工股份有限公司 | A kind of deep drilling well high bearing strength sealing agent and preparation method thereof |
| CN110937857A (en) * | 2018-09-21 | 2020-03-31 | 中国石油化工股份有限公司 | High-temperature-resistant anti-channeling emulsion elastic and tough cement slurry and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 纳米橡胶增韧环氧树脂的力学性能研究;林炎炎等;《塑料工业》;20160120;第44卷(第01期);第32-35页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113845334A (en) | 2021-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8123852B2 (en) | Cement compositions comprising high aspect ratio materials and methods of use in subterranean formations | |
| US8012582B2 (en) | Sintered proppant made with a raw material containing alkaline earth equivalent | |
| CN106986584B (en) | Low-temperature high-strength and high-toughness cement slurry as well as preparation method and application thereof | |
| EP2190942B1 (en) | Methods of using colloidal silica based gels | |
| JP2017508709A (en) | Passivated cement accelerator | |
| CN105874004A (en) | Poly (methylpentene) composition including hollow glass microspheres and method of using the same | |
| CN113480254A (en) | Composite material plugging agent for water plugging and leakage plugging of horizontal well and preparation method thereof | |
| CN113845339B (en) | Borehole wall strengthening composition for fractured formation and preparation method and application thereof | |
| CN109868125A (en) | A kind of deep drilling well high bearing strength sealing agent and preparation method thereof | |
| CN113880502B (en) | Well wall repairing enhancer for deep well broken stratum and preparation method and application thereof | |
| CN113880501B (en) | Broken stratum slug wall-fixing agent and preparation method and application thereof | |
| CN109796950B (en) | Self-adaptive fixed-point plugging composite diverting agent and application thereof | |
| CN113845334B (en) | Deep well broken formation borehole reinforcing agent and preparation method and application thereof | |
| JP6290437B2 (en) | Delayed cement composition containing pumice and related methods | |
| CN113845890B (en) | Borehole wall repairing agent suitable for broken stratum and preparation method and application thereof | |
| CN114426819B (en) | Composite toughening channeling-preventing agent for gas storage well cementation and preparation method thereof | |
| GB2431639A (en) | Aplite cement with carbon fibres | |
| CA2877093A1 (en) | Use of an additive composition for cementing bore wells | |
| WO2008146011A2 (en) | Well cementing methods | |
| CN116396733B (en) | Plugging agent and construction method thereof | |
| CA2928213C (en) | Use of synthetic smectite in set-delayed cement compositions comprising pumice | |
| WO2024020569A1 (en) | Geopolymer compositions and methods | |
| CN116023086A (en) | Thermosetting resin gel plugging composition and preparation method thereof | |
| CN117682840A (en) | Grouting slurry for rich-water tunnel and grouting process | |
| CN116285310A (en) | Perfusion type anchor rod anchoring agent and preparation method thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |