Summary of the invention
The objective of the invention is to, provide a kind of and have that excellent anti-salt is dirty invades ability with anticalcium, have higher-strength and bonding capacity, can effectively avoid erosion, prolongation oil gas well work-ing life heavy casing; Guarantee effective sealing on complicated saline bed well section sleeve pipe stratum, it is effective, easy to use to cement the well; Solve that conventional grout is not corrosion-resistant when the construction of complicated saline bed, bonding capacity is poor, gel strength slower development, early strength are low, can not effectively resist the supersaturation sodium-chlor well cementing mortar architecture that the outer crowded power that causes because of the salt deposit formation creep causes the heavy casing problem on deformation.
The present invention realizes above-mentioned purpose by the following technical solutions:
A kind of supersaturation sodium-chlor well cementing mortar architecture, it is characterized in that: it is made up of the raw material of following weight part:
100 parts of high anti-sulphur G level silicate cements
0~200 part of weighting agent
7~15 parts of anti-salt water retainings
6~15 parts of sanitass
0.5~2 part of retardant
38~60 parts of fresh water
38~40 parts in sodium-chlor
Strengthen 0.2~1 part of anti-migration agent
0.25~1 part of swelling agent.
Described anti-salt water retaining is: N; A kind of in N-DMAA (NNDMA), vinylformic acid/2-acrylic amide-2-methyl propane sulfonic acid (AA/AMPS base polymer), the acrylic amide/2-acrylic amide-2-methyl propane sulfonic acid (AM/AMPS base polymer), the relative molecular weight of polymkeric substance is 100,000~2,500,000.
Described weighting agent is a ground hematite, and its staple is Fe
2O
3, its particle size range is 1200 order to 200 orders, its density is 4.8~5.1 g/cm
3
Described sanitas is 200nm ultrafine high activity silicon-dioxide (SiO
2) particulate and water presses the suspension liquid that the mixed of 1:1 forms.
Described retardant is the glucose sodium saccharate, sodium glucoheptonate, Seignette salt, boric acid, a kind of in the organophosphate.
Described enhancing anti-migration agent is the mixture that a kind of and Repone K in trolamine, diethylolamine, the tri-isopropanolamine forms by 10 to 1 mixed.
Described swelling agent is one or more and ferrous metal or the aluminum metal particulate mixture in extra light calcined magnesia, quicklime, red stone, the zinc oxide, and ferrous metal particle or aluminum metal particulate mixed volume are all below 1%; Oxide compound can be that any two kinds of mixing also can be multiple mixing, and mixed ratio is regulated arbitrarily according to the expansion needs.
The present invention's beneficial effect compared with prior art is:
This supersaturation sodium-chlor well cementing mortar architecture is the basis with the anti-sulphur G of high level silicate cement; Utilize the unstable of supersaturated solution character and have the character of the steady state that is situated between; Add anti-salt water retaining, retardant, enhancing anti-migration agent, swelling agent, weighting agent, fresh water, sodium-chlor by proportioning, this supersaturation sodium-chlor well cementing mortar architecture had the following advantages:
(1) has good anti-salt dirt and anticalcium and invade ability;
(2) overcome the unmanageable shortcoming of supersaturated brine cement slurry thickening time, the thickening time can be regulated arbitrarily as required, and temperature variation is linear rule to the influence of thickening time and changes;
(3) controllable density of this supersaturation sodium-chlor well cementing mortar architecture is adjustable, can be at 1.90-2.40g/cm
3Regulate arbitrarily in the scope, and grout has good fluidity, WL is less, can satisfy complicated well saline bed well cementing operation requirement;
(4) 24 hours maintenance intensity of this supersaturation sodium-chlor well cementing mortar architecture is greater than 12 MPas, and the microdilatancy effect that itself has can be avoided the generation of micro-annulus, and the cement stone after guaranteeing to solidify and the bonding capacity on sleeve pipe, cement stone and stratum are good;
(5) grout has excellent nearly " right angle multiviscosisty " performance, for preventing that waterborne the scurrying of oil gas has significant effect in the stratum.
(6) the construction safety performance is prone to hold, and apparatus adaptability is better, does not need special equipment, and cement operations is convenient;
This supersaturation sodium-chlor well cementing mortar architecture technology is reliable; Site operation is simple and convenient, and it is effective to cement the well, and can satisfy saline bed; Cementing requirement under the complex conditions such as high pressure and deep well saline bed and huge thick saline bed has been filled up the blank of domestic supersaturation sodium-chlor well cementing mortar architecture.
Embodiment
Be described in detail in the face of embodiment of the present invention down:
Before the preparation supersaturation sodium-chlor well cementing mortar architecture, prepare material by each following raw material and umber:
100 parts of high anti-sulphur G level silicate cements
0~200 part of weighting agent
7~15 parts of anti-salt water retainings
6~15 parts of sanitass
0.5~2 part of retardant
38~60 parts of fresh water
38~40 parts in sodium-chlor
Strengthen 0.2~1 part of anti-migration agent
0.25~1 part of swelling agent.
The mineral constituent and the quality percentage composition of the anti-sulphur G of wherein said high level silicate cement are tricalcium silicate (Ca
3SiO
5) 48~65%, Dicalcium Phosphate (Feed Grade) (Ca
2SiO
4) 20~26%, tricalcium aluminate (Ca
3Al
2O
6) 1~3%, celite (Ca
4Al
2Fe
2O
10) 8~17%, Natural manganese dioxide of other components, gypsum, insolubles etc. accounts for 2-7%; This raw material is the commodity of selling on the market.
Described anti-salt water retaining is N; A kind of in N-DMAA (NNDMA), vinylformic acid/2-acrylic amide-2-methyl propane sulfonic acid (AA/AMPS base polymer), the acrylic amide/2-acrylic amide-2-methyl propane sulfonic acid (AM/AMPS base polymer), the relative molecular weight of polymkeric substance is 100,000~2,500,000.
Described weighting agent is a ground hematite, and its staple is Fe
2O
3, its particle size range is 1200 order to 200 orders, its density is 4.8~5.1 g/cm
3
Described sanitas is 200nm ultrafine high activity silicon-dioxide (SiO
2) particulate and water presses the suspension liquid that the mixed of 1:1 forms.
Described retardant is the glucose sodium saccharate, sodium glucoheptonate, Seignette salt, boric acid, a kind of in the organophosphate.
Described enhancing anti-migration agent is that a kind of and Repone K in trolamine, diethylolamine, the tri-isopropanolamine is by 10 to 1 mixtures that mix.
Described swelling agent is one or more and ferrous metal particle or the aluminum metal particulate mixture in extra light calcined magnesia, quicklime, red stone, the zinc oxide; Ferrous metal particle or aluminum metal particulate mixed volume are below 1%; Oxide compound can any two kinds of mixing also can be multiple mixing, and mixed ratio is regulated arbitrarily according to the expansion needs.
Described sodium-chlor is that salt is used in general industry.
Experimental technique:
Press oil gas well cementing operation grout touchstone ISO 10426-2003 standard fabrication grout, and measure the performance and the cement stone ultimate compression strength of grout, the swell test reference of grout: JC/T 313-2009 expansive cement swelling rate test method is carried out.
Specific embodiment 1:
100 parts of high anti-sulphur G level silicate cements, 38 parts of fresh water, 10 parts of anti-salt water retainings, 8 parts of sanitass strengthen 0.5 part of anti-migration agent, 15 parts in sodium-chlor, 0.5 part of swelling agent, 0.8 part of retardant.
Specific embodiment 2:
100 parts of high anti-sulphur G level silicate cements, 40 parts of fresh water, 13 parts of anti-salt water retainings, 10 parts of sanitass strengthen 0.5 part of anti-migration agent, 16 parts in sodium-chlor, 0.5 part of swelling agent, 0.8 part of retardant, 15 parts of weighting agents.
Specific embodiment 3:
100 parts of high anti-sulphur G level silicate cements, 45 parts of fresh water, 14 parts of anti-salt water retainings, 10 parts of sanitass strengthen 0.5 part of anti-migration agent, 18 parts in sodium-chlor, 0.5 part of swelling agent, 0.6 part of retardant, 52 parts of weighting agents.
Specific embodiment 4:
100 parts of high anti-sulphur G level silicate cements, 49 parts of fresh water, 15 parts of anti-salt water retainings, 12 parts of sanitass strengthen 0.5 part of anti-migration agent, 20 parts in sodium-chlor, 0.5 part of swelling agent, 0.6 part of retardant, 80 parts of weighting agents.
Specific embodiment 5:
100 parts of high anti-sulphur G level silicate cements, 52 parts of fresh water, 15 parts of anti-salt water retainings, 12 parts of sanitass strengthen 0.5 part of anti-migration agent, 21 parts in sodium-chlor, 0.5 part of swelling agent, 0.7 part of retardant, 118 parts of weighting agents.
Specific embodiment 6:
100 parts of high anti-sulphur G level silicate cements, 55 parts of fresh water, 15 parts of anti-salt water retainings, 12 parts of sanitass strengthen 0.5 part of anti-migration agent, 22 parts in sodium-chlor, 0.5 part of swelling agent, 0.8 part of retardant, 150 parts of weighting agents.
Experimental result is seen table 1.
Table 1 supersaturation sodium-chlor well cementing mortar architecture The performance test results
The weighting agent of this supersaturation sodium-chlor well cementing mortar architecture adopts ground hematite, and molecular formula is Fe
2O
3, ground hematite density is not less than 4.70g/cm3 at least.At the grout that increases the weight of just can obtain under the less situation of dosage the density that requires, help the mobile adjusting of grout, also help improving the early strength of cement stone.Ground hematite should pass through selected, to reduce its viscosity effect.
Anti-salt water retaining can adopt N; N-DMAA (NNDMA); A kind of in vinylformic acid/2-acrylic amide-2-methyl propane sulfonic acid (AA/AMPS base polymer), the acrylic amide/2-acrylic amide-2-methyl propane sulfonic acid (AM/AMPS base polymer), or several kinds used simultaneously.N, N-DMAA (NNDMA) has been introduced and has been difficult for hydrolysising group, and resistance to elevated temperatures obviously strengthens; AMPS heat-resistant salt-resistant ability is strong, and polymerization activity is high, uses increasingly extensive.The AMPS/AM/AA terpolymer has Heat stability is good, falls filtration capacity and the heat and salinity tolerance ability is strong, well the process various types grout.
Retardant adopts glucose sodium saccharate, sodium glucoheptonate, Seignette salt, boric acid; A kind of in the organophosphate, perhaps with several kinds use simultaneously all can, be mainly used in the thickening time of regulating grout; Under the comprehensive action of anti-salt water retaining, swelling agent, when hydration reaction acquires a certain degree, make grout carry out the transition to setting period rapidly; This moment, cement consistency rose rapidly, and the multiviscosisty curve is almost rectangular, reaches " right angle multiviscosisty " perfect condition of grout.
Strengthen anti-migration agent and be by a kind of and Repone K in trolamine, diethylolamine, the tri-isopropanolamine by 10 to 1 mixtures that mix.Trolamine has another name called Triethanolamine 99(TEA 99), is the organic setting accelerator of a kind of no chlorine, is alkalescence, the cement early strength agent of doing commonly used; Tri-isopropanolamine is mainly used in cement additive, and in order to improve grinding efficiency, to cut down the consumption of energy, increase strength of cement, its later strength is superior to trolamine.Diethylolamine has another name called double hydroxyethyl amine, mainly as acid gas absorbent.Appoint wherein a kind of use that mixes with Repone K, all have good enhancing anti-channeling performance.
In swelling agent employing Natural manganese dioxide, quicklime, red stone, the zinc oxide one or more and ferrous metal particle or aluminum metal particle mix.Metal-powder can produce volumetric expansion; Simultaneously mixed metal oxide uses, and this swelling agent can start hydration reaction when cement paste structure begins to form, when cement slurry has when hanging down gel strength when limited (); Expansion reaction speed reaches maximum, and speed of reaction reduces gradually subsequently; Be the hydration rate of swelling agent and the formation speed synchronization of cement paste structure.
Sanitas adopts by 200nm ultrafine high activity silicon-dioxide (SiO
2) particulate handles the back through special process and press the suspension liquid of the mixed formation of 1:1 with water.Utilize nanometer SiO
2Many meso-hole structures in surface and superpower adsorptive power and unusual physicochemical property mix and have good preservative effect in the grout, effectively reduce the corrosion to heavy casing, cement stone.
The above is the embodiment of this invention; Above-mentioned various not illustrating constitutes restriction to flesh and blood of the present invention; Under the those of ordinary skill of technical field after having read this specification sheets, can make an amendment or be out of shape above-mentioned embodiment, and do not deviate from essence of the present invention and scope.