CN102977870A - Plugging cement slurry and igneous rock fracture developing well plugging method - Google Patents
Plugging cement slurry and igneous rock fracture developing well plugging method Download PDFInfo
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Abstract
The invention provides plugging cement slurry and an igneous rock fracture developing well plugging method. The water-solid ratio of the cement slurry is (85-92):100. The cement slurry comprises the following solid components in parts by weight: 115-125 parts of cement, 40-50 parts of weight-reducing agent flyash and 5-15 parts of stabilizing agent microsilica, wherein the cement comprises 100 parts of first cement components with average particle sizes being 12-14mu m and 12-18 parts of second cement components with average particle sizes being 6-7mu m; each liter of cement slurry further comprises 4-8g of plugging agent by volume; and the plugging agent comprises 0.1-0.2 part of staple fiber, 2-4 parts of rubbers and 3.2-6 parts of packing particles by weight. The cement slurry and the method have the beneficial effects that the bridging fiber materials, elastic rubber powder materials and shell and/or saw dust packing materials are combined for use, the cement slurry is suitable for igneous rock fracture developing wells and can meet the requirements of well drilling and well cementation constructions; and the construction time is greatly shortened by adopting the plugging technology idea of integrating packing, bridging and coagulation.
Description
Technical field
The present invention relates to the petroleum drilling engineering field, especially relate to a kind of leak-stopping cement mortar that is applicable to the fracture development drilling well of Permian system volcanic rock and well cementation.
Background technology
System in Tahe Oilfield Tuo Futai block Permian system volcanic rock is broken, easily collapse, leakiness, and formation pore pressure is 1.1～1.15g/cm
3Scope, drilling fluid density is generally 1.30～1.35g/cm when normally creeping into
3, generally strengthen the drilling fluid shut-off capacity and can bore safely this stratum.Yet cement slurry density is at 1.85g/cm during owing to well cementation
3More than, easily cause severe leakage to affect cementing quality.Therefore, the leak stopping of bridge slurry, simple grout leak stopping, the compound leak stopping of bridge slurry+grout are generally adopted at present system in Tahe Oilfield Permian system pressure-bearing leak stopping, and effect is all not ideal, the equal less than 50% of leak stopping success ratio, the blocking construction cycle is also longer, and average out to 9.53 days reaches 32 days most.
Summary of the invention
The first technical problem to be solved by this invention is to overcome existing volcanic rock fracture development well easily to miss in drilling well and well cementing process, the defective that conventional leak-stopping technique can not carry out to it effective shutoff, a kind of leak-stopping cement mortar is provided, be used in combination the fiber bridging materials, the rubber powder resilient material, shell and/or sawdust packing material make grout pressure-bearing value greater than 8Mpa, be applicable to volcanic rock fracture development well, can satisfy drilling well and needs of cementing operations.
The second technical problem to be solved by this invention is, a kind of volcanic rock fracture development well blocking method is provided, and adopts the collection filling, builds bridge and be condensed into the leakage stopping technology thinking of one, makes the pressure-bearing value all greater than 8Mpa, greatly shortened the engineering time.
In order to solve the problems of the technologies described above, the first technical scheme that the present invention adopts is: a kind of leak-stopping cement mortar, and this grout water-solid ratio is 85-92:100; In weight part, this grout solids component comprises: cement 115-125 part, light-weight additive flyash 40-50 part and the little silicon 5-15 of stablizer part, wherein said cement comprise that median size is 100 parts of cement the first components of 12-14 μ m and cement second component 12-18 part that median size is 6-7 μ m; In grout volume, further comprise plugging agent 4-8g in every premium on currency mud; Wherein, in weight part, described plugging agent comprises 0.1-0.2 part staple fibre, 2-4 part rubber and 3.2-6 part filler particles.
Grout water-solid ratio of the present invention refers to the mass ratio of water and solids component.
Aforesaid leak-stopping cement mortar, this grout water-solid ratio is 88-90:100; In weight part, this grout solids component comprises: cement 118-122 part, and light-weight additive flyash 43-48 part and the little silicon 8-12 of stablizer part, wherein said cement comprises 100 parts of the first components and cement second component 18-22 part; In grout volume, further comprise plugging agent 5-7g in every premium on currency mud; Wherein, in weight part, described plugging agent comprises 0.1-0.2 part staple fibre, 2-4 part rubber and 3.2-6 part filler particles.
Aforesaid leak-stopping cement mortar, described staple fibre is glass fibre, carbon fiber, polypropylene fibre or nylon fiber, its length is 4.5-5.5mm.
Aforesaid leak-stopping cement mortar, described rubber is styrene-butadiene rubber(SBR), cis-1,4-polybutadiene rubber, polyisoprene rubber, ethylene-propylene rubber(EPR), chloroprene rubber, paracril or urethanes, the rubber grain median size is 5 ~ 10mm.
Aforesaid leak-stopping cement mortar, described filler particles are at least a in shell or the sawdust.
Aforesaid leak-stopping cement mortar, in weight part, described filler particles comprises shell 1.2 ~ 2 weight parts and sawdust 2 ~ 4 weight parts.
Aforesaid leak-stopping cement mortar, with cement in the grout, flyash and little silicone content summation are 100 weight part meters, this grout further comprises: anti-migration agent 5 ~ 13 weight parts, water retaining 15 ~ 23 weight parts, retardant 0.4 ~ 1.0 weight part, at least a in defoamer 0.5 ~ 1.0 weight part.
Aforesaid leak-stopping cement mortar, described agent for anti gassing-out is styrene-butadiene latex; Described water retaining is the terpolymer of 2-acrylamide-2 methyl propane sulfonic acid, vinylformic acid and acrylamide; Described retardant is Sodium hexametaphosphate 99; Described defoamer is tributyl phosphate.
In order to solve the problems of the technologies described above, the second technical scheme that the present invention adopts is: the method for a kind of volcanic rock fracture development well leak stopping, the method comprises following operation: inject each described leak-stopping cement mortar of claim 1-8 to the leakage section, then closing well Hou Ning drives a well after 12 hours at least.
The method of aforesaid volcanic rock fracture development well leak stopping, the method comprises following operation: (1) transfers polish drill rod to leakage section bottom; (2) in pit shaft, inject spearhead; (3) in pit shaft, inject leak-stopping cement mortar; (4) in pit shaft, inject subsequent fluid; (5) for slurry, leak-stopping cement mortar is replaced the position of leakage section; And (6) just are being extruded into the leak-stopping cement mortar that has replaced the leakage section in the pit shaft in the stratum;
Wherein, described spearhead and subsequent fluid are the guar gum hydroxypropyl-trimethyl ammonium chloride solution of 0.35wt%; Described is former well slurry for slurry.
The method of aforesaid volcanic rock fracture development well leak stopping is carried out plugging operations when entering Permian system 100m and drilling the Permian system.
The method of aforesaid volcanic rock fracture development well leak stopping, the consumption of described spearhead and subsequent fluid are 250m annular space volumetric quantity
Leak-stopping cement mortar of the present invention is used in combination the fiber bridging materials, the rubber powder resilient material, and shell and/or sawdust packing material make grout pressure-bearing value greater than 8Mpa, are applicable to volcanic rock fracture development well, can satisfy drilling well and needs of cementing operations.The present invention adopts the collection filling, builds bridge and is condensed into the leakage stopping technology thinking of one, has greatly shortened the engineering time.
Embodiment
For fully understanding the present invention's purpose, feature and effect, by following concrete embodiment, the present invention is elaborated.
Easily miss for volcanic rock, conventional leak-stopping technique one-time success rate is low, the problem that plugging time is long, and the present invention develops a kind of leak-stopping mortar architecture: extra material is comprised of G class g cement, little silicon, superfine cement; The oil well admixture adopts water retaining, retardant, dispersion agent and defoamer; Patching materials comprises rubber powder, shell, sawdust and the staple fibre of certain size particle, and its middle short fiber is bridging materials, and rubber powder is resilient material, and shell, sawdust are the filler particles material.According to crack leakage situation, but appropriate change grain diameter grading composition.Adopt flyash to reduce the density of leak-stopping cement mortar as lightening material.The present invention develops a kind of novel concrete slurry system that is fit to the leak stopping of (Permian system) volcanic rock by combine experiment, and the pressure-bearing value is greater than 8Mpa.The key of this technology success is prescription and the construction technology measure of leak-stopping cement mortar, and reasonably prescription and construction technology can shorten the time of construction greatly.
A kind of leak-stopping cement mortar, this grout water-solid ratio is 85-92:100; In weight part, this grout solids component comprises: cement 115-125 part, light-weight additive flyash 40-50 part and the little silicon 5-15 of stablizer part, wherein said cement comprise that median size is 100 parts of cement the first components of 12-14 μ m and cement second component 12-18 part that median size is 6-7 μ m; In grout volume, further comprise plugging agent 4-8g in every premium on currency mud; Wherein, in weight part, described plugging agent comprises 0.1-0.2 part staple fibre, 2-4 part rubber and 3.2-6 part filler particles.
Preferably, this grout water-solid ratio is 88-90:100; In weight part, this grout solids component comprises: cement 118-122 part, and light-weight additive flyash 43-48 part and the little silicon 8-12 of stablizer part, wherein said cement comprises 100 parts of the first components and cement second component 18-22 part; In grout volume, further comprise plugging agent 5-7g in every premium on currency mud; Wherein, in weight part, described plugging agent comprises 0.1-0.2 part staple fibre, 2-4 part rubber and 3.2-6 part filler particles.
Median size of the present invention refers to volume average particle size.
The preferred G class g cement of cement the first component, G class g cement median size are preferably the preferred 12.96 μ m of 12-14 μ m().The preferred superfine cement of cement second component, superfine cement refers to reach the cement of secondary nanophase.Superfine cement median particle diameter D50 of the present invention is 6-8 μ m, the preferred 6.03 μ m of median size 6-7 μ m().
Flyash refers to that the powder collected, the present invention preferably satisfy I level and the II level of regulation in the GB1596-91 table 1 from the coal-powder boiler flue gas.
The median size of the little silicon of the present invention is at the preferred 0.3 μ m of 0.28-0.32 μ m().Little silicon is the product take soft silica (more than the 95wt%) as main component.Calcium hydroxide reaction when little silicon can be with hydrated reaction of cement generates calcium silicate hydrate, produces the water mudrock structure that is difficult for infiltration; In addition, little silicon can form reticulated structure by adsorbed water molecule, thereby improves the stability of grout.Itself just has resistant to elevated temperatures characteristics little silicon.
Staple length of the present invention is the preferred 5mm of 4.5-5.5mm().Staple fibre of the present invention is bridging materials, and used fiber is selected from conventional commercially available alkali free glass fibre, carbon fiber, polypropylene fibre, nylon fiber etc.
The present invention mainly utilizes the elasticity of rubber, makes it be used as resilient material, and therefore the rubber grain of routine all can be applicable to the present invention.The operable rubber of the present invention is styrene-butadiene rubber(SBR), cis-1,4-polybutadiene rubber, polyisoprene rubber, ethylene-propylene rubber(EPR), chloroprene rubber, paracril or urethanes.The present invention selects the median size of rubber, the large rubber of the large selection particle diameter of wastage, the little rubber of selection particle diameter that wastage is little according to wastage.Preferably, the rubber grain median size is 5 ~ 10mm.
The operable filler particles of the present invention is at least a in shell or the sawdust.The present invention does not have particular requirement to kind and the source of shell or sawdust.Shell of the present invention can commercially obtain, and also can process with nut-shell, almond, Nux Pruni pseudocerasi, jujube nucleus etc. voluntarily.Sawdust of the present invention obtains by commercial, and preferred sawdust material can be kahikatea, birch, Zhang Song, the powder of linden and willow etc.Preferably, in weight part, described filler particles comprises shell 1.2 ~ 2 weight parts and sawdust 2 ~ 4 weight parts.
Preferably, with cement in the grout, flyash and little silicone content summation are 100 weight part meters, this grout further comprises: anti-migration agent 5 ~ 13 weight parts, water retaining 15 ~ 23 weight parts, retardant 0.4 ~ 1.0 weight part, at least a in defoamer 0.5 ~ 1.0 weight part.
The preferred water retaining of the present invention is the terpolymer of 2-acrylamide-2 methyl propane sulfonic acid, vinylformic acid and acrylamide.Preferred 2-acrylamide-2 methyl propane sulfonic acid, vinylformic acid and acrylamide are that 50:45-48:2-5 is synthetic according to weight ratio, and viscosity-average molecular weight is 58-75 ten thousand dalton.Water retaining of the present invention can commercially obtain, for example the water retaining of the product designation FS-23L of American-European section.
The effect of agent for anti gassing-out is to prevent that gas from scurrying into annular space, the preferred agent for anti gassing-out of the present invention is styrene-butadiene latex, it is the multipolymer of vinylbenzene and divinyl, conventional commercially available oil well all can be applied to the present invention with styrene-butadiene latex, for example vinylbenzene and divinyl weight ratio are the multipolymer of 20-80:80-20, and more preferably vinylbenzene and divinyl weight ratio are the multipolymer of 1:1.The first agent for anti gassing-out of the present invention can commercially obtain, for example the product designation FLOK-1 of American-European section.
The effect of described retardant is the thickening time that delays grout.General cement all can be used as retardant of the present invention with retardant, for example sulfonated lignin and derivative thereof, low molecular weight cellulose and derivative thereof, hydroxycarboxylic acid, organic phospho acid, boric acid or its salt or mixture, phosphoric acid salt, subphosphate, preferred ethylene diamine tetra methylene phosphonic acid calcium (ethylenediamine tetramethylene phosphonic acid calcium), ethylene diamine tetra methylene phosphonic acid sodium (sodium ethylenediamine tetramethylenephosphonate), quadrol five methylenephosphonic acids (quadrol pentamethylene phosphonic acids), the 2-acrylamide-2-methyl propane sulfonic, two sodium polyphosphates, tripoly phosphate sodium STPP, Sodium hexametaphosphate 99 etc.
The preferred defoamer of the present invention is polyether antifoam agent, for example glycerol ether type defoamer, amino dodecane ether type defoamer and lauric acid ether type defoamer.Preferred glycerol ether type defoamer is: block fashion " GPEP " type (glycerol, propylene oxide, oxyethane, propylene oxide block), and viscosity-average molecular weight is 3500, and the oxyethane massfraction is 6%, and the rear propylene oxide is 8%.The preferred defoamer of the present invention can also be tributyl phosphate, and it can commercially obtain, for example the defoamer of the product designation DF-A of American-European section.
The method of a kind of volcanic rock fracture development well leak stopping is carried out this plugging operations when entering Permian system 100m and drilling the Permian system.The method comprises following operation: inject each described leak-stopping cement mortar of claim 1-8 to the leakage section, then closing well Hou Ning drives a well after 12 hours at least.Concrete, the method comprises following operation:
(1) polish drill rod is transferred to leakage section bottom;
(2) in pit shaft, inject spearhead;
(3) in pit shaft, inject leak-stopping cement mortar;
(4) in pit shaft, inject subsequent fluid;
(5) for slurry, leak-stopping cement mortar is replaced the position of leakage section; And
(6) leak-stopping cement mortar that has replaced the leakage section in the pit shaft just is extruded in the stratum.
The present invention is to spearhead, subsequent fluid and replace slurry all not have particular requirement, conventional leak stopping is with spearhead, subsequent fluid and replace slurry all to can be applicable to the present invention, for example spearhead and subsequent fluid are the guar gum hydroxypropyl-trimethyl ammonium chloride solution of 0.35wt%, are former well slurries for slurry.The consumption of described spearhead and subsequent fluid is 250m annular space volumetric quantity.The present invention is according to the consumption of the length selection leak-stopping cement mortar of leakage section, and those skilled in the art are easy to select rational leak-stopping cement mortar consumption according to the length of leakage section.According to the leak-stopping cement mortar consumption, those skilled in the art are easy to select reasonably for the slurry consumption.
In a concrete embodiment, the method for a kind of Permian system volcanic rock fracture development well leak stopping, the method comprises the steps:
(1) adopts conventional drilling tool to be drilled into the loss horizon degree of depth, carry out the electrical measurement operation.Electrical measurement comprises gamma, sound wave, resistivity logging etc., its objective is the lithology of investigating the stratum, and the position of finding the Permian system accurately.
(2) according to electrical measurement data and log data analysis, block accurate Permian system layer position, and definite leak stopping prescription, leak stopping slurry amount, for the slurry amount.
Usually, can be according to each composition in leakage situation (for example leak-off velocity) the adjusting plugging agent especially particle diameter of rubber, preferred, the rubber grain median size is 5 ~ 10mm.For example the well size is missed segment length, determines the amount that the amount of liquid that each operation need to be injected, particularly leak-stopping cement mortar need to inject.
(3) well that fully circulates guarantees that well is clean, and the shaft bottom is without sand setting.
(4) do preparation of construction, the dress well head is taken over line, and surface pipeline carries out pressure testing, guarantees that surface pipeline does not sting not leak.
(5) with drilling tool down to block section bottom, then adopt polish drill rod is transferred to leakage section bottom, in pit shaft, inject spearhead (the guar gum hydroxypropyl-trimethyl ammonium chloride solution of 0.35wt%), leak-stopping cement mortar, subsequent fluid (the guar gum hydroxypropyl-trimethyl ammonium chloride solution of 0.35wt%), and replace slurry (former well slurry) to put in place.Carry and be drilled into leak stopping slurry top, block section.Wherein, the consumption of spearhead and subsequent fluid is 250m annular space volumetric quantity.
(6) just squeezing the leak-stopping cement mortar operation to the block section, working being drilled into well head after this operation is finished, recycling unnecessary grout, closing well is waited solidifying, waits to coagulate to drive a well behind the 12h at least, trips out whole drilling tools and sweeps plug behind the 24h at least.
Routine is swept blocking method all can be applied to the present invention, for example sweeps 4 tons of the pressure of the drill of plug, and 65 rev/mins of rotating speeds bore cement plug.
Volcanic rock fracture development well blocking method of the present invention can also adopt the above method of injecting leak-stopping cement mortar twice, avoids a leak stopping can not reach corresponding effect.
To carry out the pressure testing operation after plugging operations is complete.Check well head before the pressure testing, prepare to suppress.Must carry out minute inspection to all pipelines of the recycle system, gate before the pressure testing, find that the pipeline of the bad or spinosity of sealing, leakage phenomenon is in time changed, guarantee that the pressure testing operation carries out smoothly.
This pressure testing operation comprises:
A. for the first time pressurization: closing well, the discharge capacity of then rushing/dividing according to 15-20 is sprained and is pressed so that well head adds back pressure 4MPa, and static building the pressure when wellhead pressure is lower than 2MPa, continues to add to 4MPa, until the pressure behind 5～10min is not less than 3～4MPa;
B. for the second time pressurization is beaten wellhead pressure to 6MPa according to the discharge capacity that 15-20 rushes/divides, and static building the pressure is until can be at 6MPa voltage stabilizing 5～10min; Then, per 5～10min carries out a supercharging to wellhead pressure, and the supercharging amplitude is 1～2MPa, until wellhead pressure is beaten to 8MPa.
Among the step b, if wellhead pressure can not be stablized, stop pressurization, static at least 12h, and then repeating step a and step b are until the pressure testing success.
C. can carry out follow-up drilling operation after the pressure testing success.
Below by the enforcement that specific embodiment is set forth method of the present invention, one skilled in the art will appreciate that this should not be understood to the restriction to claim scope of the present invention.
Raw materials used as follows among the embodiment:
Table 1
The grout Preparation Example
Embodiment 1
G class g cement 100g, superfine cement 20g, flyash 45g, little silicon 10g are mixed, then add entry 155.75g(water-solid ratio 89:100) stir, make slurry mixture, then add plugging agent 6g according to every liter of slurry mixture, wherein plugging agent comprises: staple fibre 0.116g, rubber 2.4g, shell 1.28g and sawdust 2.4g obtain grout.
Embodiment 2-10
Embodiment 2-10 and embodiment 1 adopt essentially identical method, and difference is shown in the table 2.
Table 2
Performance test
Adopt North China research institute DLM-01 sealing Analog Device to carry out the pressure-bearing experiment.Adopt the following crack of quartzy casting bed simulation 0.5mm of 830 microns-1700 microns (10-20 orders).Inject the leak-stopping cement mortar Hou Ning of embodiment 1-10 more than 12 hours.This quartz casting bed is pressurized to 8MPa, and the sealing filter loss is zero, takes apart and finds that filtrate invades casting bed 2cm behind the instrument, illustrates that the leak-stopping cement mortar of embodiment 1-10 can form plugged zone fast, has saved plugging time.In addition, the leak-stopping cement mortar of embodiment 1-10 can more than the pressure-bearing 8MPa, satisfy volcanic rock fracture development well leak stopping demand.
Adopt GB/T 19139-2003 oil-well cement test method to record, embodiment of the invention 1-10 density is 1.50g/cm
3About.
Test in place example (secret test)
The leak-stopping cement mortar of embodiment 4 is applied to TP241X and two mouthfuls of wells of TP246X carry out Permian system plugging test, construction is once success all, the pressure-bearing value has realized effective shutoff on Permian system fractured igneous leakiness stratum all greater than 8Mpa, ensures follow-up drilling operation safety.In addition, 2010 annual plugging time 10.3 days, the leak-stopping cement mortar of use embodiment 4, plugging time shortens dramatically, and saves more than 60% more in the past, and special TP246X well is saved the saving of pressure-bearing plugging time and is reached 65%.Table 3 is that TP241X and TP246X are entering Permian system 100m and drilling the data that the Permian system carries out plugging operations respectively.
Table 3
The below illustrates that as an example of the TP241X well example the leak-stopping cement mortar with embodiment 4 is applied to the condition of construction that the TP241X well carries out above-mentioned Permian system plugging test.
It is domestic that TP241X well well head is positioned at the Shaya County, and finishing drilling well depth 7046m, zone of interest are room group of the Ordovician system.This well Permian system buried depth is 4889 ~ 5137m, and thickness reaches 248m.
TP241X entering Permian system 100m and drilling the Permian system and carry out plugging operations, improves whole Permian system well section bearing capacity respectively, has guaranteed follow-up safety drilling operation.
For the first time cement plug construction:
Polish drill rod is transferred to 4991m, and circulation well cleanup is more than one week, and preparation of construction is done by the team that then cements the well.In pit shaft, annotate spearhead (the guar gum hydroxypropyl-trimethyl ammonium chloride solution of 0.35wt%) 5m
3, the leak-stopping cement mortar 12m of notes embodiment 4
3, annotate subsequent fluid (the guar gum hydroxypropyl-trimethyl ammonium chloride solution of 0.35wt%) 2m
3, the large pump of drill crew is for slurry (former well slurry) 39.5m
3, operation pressure changes in 0 ~ 14.16 ~ 17.5MPa scope during for slurry.On carry drilling tool 25 posts (1 post is 3 drilling rods), then cementing truck intermittently just squeezes the leak-stopping cement mortar 6m of embodiment 4
3, work to be drilled into well head, recycle unnecessary grout, then drive a well behind the closing well 12h, adopt 4 tons of the pressure of the drill behind the 24h, 65 rev/mins of rotating speeds are visited and are swept cement plug.87 hours consuming time of this leak stopping, 8.65MPa carries out pressure testing, 30min pressure drop 0.2Mpa.
For the second time cement plug construction:
Drilling team creeps into to Permian system bottom position 5157m, and polish drill rod is transferred to 5155m, and after one week of circulation well cleanup was above, preparation of construction was done by well cementation team, annotates spearhead (the guar gum hydroxypropyl-trimethyl ammonium chloride solution of 0.35wt%) 5m in pit shaft
3, annotate embodiment 4 grout 17m
3, annotate subsequent fluid (the guar gum hydroxypropyl-trimethyl ammonium chloride solution of 0.35wt%) 1.9m
3, the large pump of drill crew is for slurry (former well slurry) 41.2m
3, operation pressure changes in operation pressure 0 ~ 12MPa during for slurry.On carry drilling tool 25 posts, then cementing truck intermittently just squeezes the leak-stopping cement mortar 5.5m of embodiment 4
3, rise and be drilled into well head, recycle unnecessary grout.Then drive a well behind the closing well 12h, adopt 4 tons of the pressure of the drill behind the 24h, 65 rev/mins of rotating speeds are visited and are swept cement plug.99 hours consuming time of this leak stopping, 8.5MPa carries out pressure testing, 30min pressure drop 0.2Mpa.
Leak-stopping cement mortar of the present invention is used in combination the fiber bridging materials, the rubber powder resilient material, and shell and/or sawdust packing material make the pressure-bearing value greater than 8Mpa, are applicable to volcanic rock fracture development well, can satisfy drilling well and needs of cementing operations.In addition, the present invention adopts the collection filling, builds bridge and is condensed into the leakage stopping technology thinking of one, and the TP241X well enters 87 hours Permian system 100m engineering times, drills 99 hours Permian system engineering times, with the engineering time toward saving more than 60%.
Claims (12)
1. a leak-stopping cement mortar is characterized in that, this grout water-solid ratio is 85-92:100; In weight part, this grout solids component comprises: cement 115-125 part, light-weight additive flyash 40-50 part and the little silicon 5-15 of stablizer part, wherein said cement comprise that median size is 100 parts of cement the first components of 12-14 μ m and cement second component 12-18 part that median size is 6-7 μ m; In grout volume, further comprise plugging agent 4-8g in every premium on currency mud; Wherein, in weight part, described plugging agent comprises 0.1-0.2 part staple fibre, 2-4 part rubber and 3.2-6 part filler particles.
2. leak-stopping cement mortar according to claim 1 is characterized in that, this grout water-solid ratio is 88-90:100; In weight part, this grout solids component comprises: cement 118-122 part, and light-weight additive flyash 43-48 part and the little silicon 8-12 of stablizer part, wherein said cement comprises 100 parts of cement the first components and cement second component 18-22 part; In grout volume, further comprise plugging agent 5-7g in every premium on currency mud; Wherein, wherein, in weight part, described plugging agent comprises 0.1-0.2 part staple fibre, 2-4 part rubber and 3.2-6 part filler particles.
3. leak-stopping cement mortar according to claim 1 and 2 is characterized in that, described staple fibre is glass fibre, carbon fiber, and polypropylene fibre or nylon fiber, its length is 4.5-5.5mm.
4. each described leak-stopping cement mortar is characterized in that according to claim 1-3, and described rubber is styrene-butadiene rubber(SBR), cis-1,4-polybutadiene rubber, and polyisoprene rubber, ethylene-propylene rubber(EPR), chloroprene rubber, paracril or urethanes, the rubber grain median size is 5 ~ 10mm.
5. each described leak-stopping cement mortar is characterized in that according to claim 1-4, and described filler particles is at least a in shell or the sawdust.
6. leak-stopping cement mortar according to claim 5 is characterized in that, in weight part, described filler particles comprises shell 1.2 ~ 2 weight parts and sawdust 2 ~ 4 weight parts.
7. each described leak-stopping cement mortar according to claim 1-6, it is characterized in that, with cement in the grout, flyash and little silicone content summation are 100 weight part meters, this grout further comprises: anti-migration agent 5 ~ 13 weight parts, water retaining 15 ~ 23 weight parts, retardant 0.4 ~ 1.0 weight part, at least a in defoamer 0.5 ~ 1.0 weight part.
8. leak-stopping cement mortar according to claim 7 is characterized in that, described agent for anti gassing-out is styrene-butadiene latex; Described water retaining is the terpolymer of 2-acrylamide-2 methyl propane sulfonic acid, vinylformic acid and acrylamide; Described retardant is Sodium hexametaphosphate 99; Described defoamer is tributyl phosphate.
9. the method for volcanic rock fracture development well leak stopping, the method comprises following operation: inject each described leak-stopping cement mortar of claim 1-8 to the leakage section, then closing well Hou Ning drives a well after 12 hours at least.
10. the method for volcanic rock fracture development well according to claim 9 leak stopping is characterized in that the method comprises following operation:
(1) polish drill rod is transferred to leakage section bottom;
(2) in pit shaft, inject spearhead;
(3) in pit shaft, inject leak-stopping cement mortar;
(4) in pit shaft, inject subsequent fluid;
(5) for slurry, leak-stopping cement mortar is replaced the position of leakage section; And
(6) just be extruded into the leak-stopping cement mortar that has replaced the leakage section in the pit shaft in the stratum;
Wherein, described spearhead and subsequent fluid are the guar gum hydroxypropyl-trimethyl ammonium chloride solution of 0.35wt%; Described is former well slurry for slurry.
11. according to claim 9 or the method for 10 described volcanic rock fracture development well leak stopping, it is characterized in that, when entering Permian system 100m and drilling the Permian system, carry out plugging operations.
12. the method for volcanic rock fracture development well according to claim 11 leak stopping is characterized in that, the consumption of described spearhead and subsequent fluid is 250m annular space volumetric quantity.
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Cited By (23)
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| CN102876303A (en) * | 2012-09-11 | 2013-01-16 | 西南石油大学 | Pressure-bearing lost circulation additive for drilling fluid and for stably bearing pressure on smooth fracture leakage wall surface |
| CN103265934A (en) * | 2013-05-02 | 2013-08-28 | 中国石油天然气股份有限公司 | Profile control agent for water injection well, preparation method and application thereof |
| CN103740352A (en) * | 2013-12-06 | 2014-04-23 | 中国石油集团渤海钻探工程有限公司 | Expansion oil well cement with temperature resistance |
| CN103756656A (en) * | 2013-12-24 | 2014-04-30 | 中国石油集团渤海钻探工程有限公司 | Static gelatinous leaking stoppage liquid for stopping vicious leakage |
| CN104291733A (en) * | 2014-09-16 | 2015-01-21 | 陕西延长石油(集团)有限责任公司研究院 | Toughened anti-channeling agent for cement and toughened cement for cementing shale gas horizontal well |
| 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 |
| CN104513651A (en) * | 2013-09-28 | 2015-04-15 | 王鉴 | Drilling fluid additive capable of improving oil well cementing quality |
| CN104632123A (en) * | 2013-11-15 | 2015-05-20 | 中国石油天然气股份有限公司 | Ultralow-pressure well plugging method |
| CN104774599A (en) * | 2015-03-25 | 2015-07-15 | 新疆贝肯能源工程股份有限公司 | Highly elastic collapse preventing and leakage stopping agent for drilling fluids, and preparation method thereof |
| CN105505352A (en) * | 2015-12-29 | 2016-04-20 | 中国石油化工股份有限公司 | Plugging agent for high-sulfur-content gas wells |
| CN104153731B (en) * | 2014-07-11 | 2016-05-25 | 东营市华翰石油技术开发有限公司 | A kind of well drilling waste mud reuse water plugging and profile controlling process |
| CN106351603A (en) * | 2016-08-24 | 2017-01-25 | 中国石油集团渤海钻探工程有限公司 | Crack or cave serious leakage plugging method and plugging material feeding pipe string |
| CN106554763A (en) * | 2015-09-24 | 2017-04-05 | 中国石油化工股份有限公司 | A kind of blocking agent and its preparation method and application |
| CN106928947A (en) * | 2017-03-28 | 2017-07-07 | 诺斯石油工具(天津)有限公司 | The plugging material of annular space, plugging device and method for blocking between a kind of sleeve pipe |
| CN107099277A (en) * | 2016-02-23 | 2017-08-29 | 李宇乡 | High-temperature-resistant high-salt plugging agent is used in oil recovery |
| CN109517589A (en) * | 2017-09-19 | 2019-03-26 | 中国石油化工股份有限公司 | A kind of oil gas well cementing operation dry method light-weight cement slurry and preparation method |
| CN109538158A (en) * | 2018-10-31 | 2019-03-29 | 中国石油集团川庆钻探工程有限公司 | Method for improving cement paste leaking stoppage construction success rate |
| CN109709605A (en) * | 2019-02-28 | 2019-05-03 | 中国石油化工股份有限公司 | The disconnected solution seismic data imaging method of igneous rock complex area carbonate rock and equipment |
| CN111537344A (en) * | 2020-05-11 | 2020-08-14 | 西南石油大学 | Method for testing compressive strength of rigid plugging material |
| CN112760084A (en) * | 2019-10-21 | 2021-05-07 | 中石化石油工程技术服务有限公司 | Plugging agent for oil-based drilling fluid and preparation method and application thereof |
| CN113372889A (en) * | 2021-06-23 | 2021-09-10 | 成都西油华巍科技有限公司 | High water loss plugging agent |
| CN114893146A (en) * | 2021-12-24 | 2022-08-12 | 中煤地质集团有限公司 | Method for unsealing and cementing of channeling drilling hole |
| US11613943B2 (en) | 2021-03-25 | 2023-03-28 | Saudi Arabian Oil Company | Spent vehicle tire lost circulation material (LCM) |
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| CN102703044A (en) * | 2012-05-23 | 2012-10-03 | 成都欧美科石油科技股份有限公司 | Novel cement slurry plugging fluid |
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Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876303B (en) * | 2012-09-11 | 2014-06-25 | 西南石油大学 | Pressure-bearing lost circulation additive for drilling fluid and for stably bearing pressure on smooth fracture leakage wall surface |
| CN102876303A (en) * | 2012-09-11 | 2013-01-16 | 西南石油大学 | Pressure-bearing lost circulation additive for drilling fluid and for stably bearing pressure on smooth fracture leakage wall surface |
| CN103265934A (en) * | 2013-05-02 | 2013-08-28 | 中国石油天然气股份有限公司 | Profile control agent for water injection well, preparation method and application thereof |
| CN103265934B (en) * | 2013-05-02 | 2015-09-09 | 中国石油天然气股份有限公司 | Profile control agent for water injection well, preparation method and application thereof |
| CN104513651A (en) * | 2013-09-28 | 2015-04-15 | 王鉴 | Drilling fluid additive capable of improving oil well cementing quality |
| CN104513651B (en) * | 2013-09-28 | 2017-07-07 | 王鉴 | A kind of drilling fluid additive that can improve oil well cementing quality |
| CN104632123A (en) * | 2013-11-15 | 2015-05-20 | 中国石油天然气股份有限公司 | Ultralow-pressure well plugging method |
| CN104632123B (en) * | 2013-11-15 | 2017-08-04 | 中国石油天然气股份有限公司 | Ultralow-pressure well plugging method |
| CN103740352A (en) * | 2013-12-06 | 2014-04-23 | 中国石油集团渤海钻探工程有限公司 | Expansion oil well cement with temperature resistance |
| CN103756656A (en) * | 2013-12-24 | 2014-04-30 | 中国石油集团渤海钻探工程有限公司 | Static gelatinous leaking stoppage liquid for stopping vicious leakage |
| CN103756656B (en) * | 2013-12-24 | 2016-08-17 | 中国石油集团渤海钻探工程有限公司 | Static gelling leakage-stopping liquid for stopping malignant leakage |
| CN104153731B (en) * | 2014-07-11 | 2016-05-25 | 东营市华翰石油技术开发有限公司 | A kind of well drilling waste mud reuse water plugging and profile controlling process |
| CN104291733A (en) * | 2014-09-16 | 2015-01-21 | 陕西延长石油(集团)有限责任公司研究院 | Toughened anti-channeling agent for cement and toughened cement for cementing shale gas horizontal well |
| 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 |
| CN104774599A (en) * | 2015-03-25 | 2015-07-15 | 新疆贝肯能源工程股份有限公司 | Highly elastic collapse preventing and leakage stopping agent for drilling fluids, and preparation method thereof |
| CN106554763A (en) * | 2015-09-24 | 2017-04-05 | 中国石油化工股份有限公司 | A kind of blocking agent and its preparation method and application |
| CN105505352A (en) * | 2015-12-29 | 2016-04-20 | 中国石油化工股份有限公司 | Plugging agent for high-sulfur-content gas wells |
| CN105505352B (en) * | 2015-12-29 | 2021-03-26 | 中国石油化工股份有限公司 | Plugging agent for high-sulfur-content gas well |
| CN107099277A (en) * | 2016-02-23 | 2017-08-29 | 李宇乡 | High-temperature-resistant high-salt plugging agent is used in oil recovery |
| CN106351603A (en) * | 2016-08-24 | 2017-01-25 | 中国石油集团渤海钻探工程有限公司 | Crack or cave serious leakage plugging method and plugging material feeding pipe string |
| CN106351603B (en) * | 2016-08-24 | 2018-11-20 | 中国石油集团渤海钻探工程有限公司 | A kind of crack or solution cavity severe leakage blocking method and plugging material are sent into pipe string |
| CN106928947A (en) * | 2017-03-28 | 2017-07-07 | 诺斯石油工具(天津)有限公司 | The plugging material of annular space, plugging device and method for blocking between a kind of sleeve pipe |
| CN106928947B (en) * | 2017-03-28 | 2022-11-15 | 北京华油油气技术开发有限公司 | Plugging material, plugging device and plugging method for annular space between sleeves |
| CN109517589A (en) * | 2017-09-19 | 2019-03-26 | 中国石油化工股份有限公司 | A kind of oil gas well cementing operation dry method light-weight cement slurry and preparation method |
| CN109517589B (en) * | 2017-09-19 | 2021-03-16 | 中国石油化工股份有限公司 | Oil-gas well cementing dry-method well cementing low-density cement slurry and preparation method thereof |
| CN109538158A (en) * | 2018-10-31 | 2019-03-29 | 中国石油集团川庆钻探工程有限公司 | Method for improving cement paste leaking stoppage construction success rate |
| CN109709605B (en) * | 2019-02-28 | 2020-09-01 | 中国石油化工股份有限公司 | Igneous rock complex area carbonate rock broken solution seismic data imaging method and equipment |
| CN109709605A (en) * | 2019-02-28 | 2019-05-03 | 中国石油化工股份有限公司 | The disconnected solution seismic data imaging method of igneous rock complex area carbonate rock and equipment |
| CN112760084A (en) * | 2019-10-21 | 2021-05-07 | 中石化石油工程技术服务有限公司 | Plugging agent for oil-based drilling fluid and preparation method and application thereof |
| CN112760084B (en) * | 2019-10-21 | 2022-10-14 | 中石化石油工程技术服务有限公司 | Plugging agent for oil-based drilling fluid and preparation method and application thereof |
| CN111537344A (en) * | 2020-05-11 | 2020-08-14 | 西南石油大学 | Method for testing compressive strength of rigid plugging material |
| CN111537344B (en) * | 2020-05-11 | 2022-03-08 | 西南石油大学 | Method for testing compressive strength of rigid plugging material |
| US11613943B2 (en) | 2021-03-25 | 2023-03-28 | Saudi Arabian Oil Company | Spent vehicle tire lost circulation material (LCM) |
| CN113372889A (en) * | 2021-06-23 | 2021-09-10 | 成都西油华巍科技有限公司 | High water loss plugging agent |
| CN114893146A (en) * | 2021-12-24 | 2022-08-12 | 中煤地质集团有限公司 | Method for unsealing and cementing of channeling drilling hole |
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