CN109705827A - Oil drilling leak stopping pressure-bearing agent and preparation method thereof - Google Patents
Oil drilling leak stopping pressure-bearing agent and preparation method thereof Download PDFInfo
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- CN109705827A CN109705827A CN201711005366.8A CN201711005366A CN109705827A CN 109705827 A CN109705827 A CN 109705827A CN 201711005366 A CN201711005366 A CN 201711005366A CN 109705827 A CN109705827 A CN 109705827A
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Abstract
A kind of oil drilling leak stopping pressure-bearing agent and preparation method thereof includes bentonite, elastic granule, oil-soluble resin, flake asbestos, filler, promotor, enhancing curing agent.Leak stopping pressure-bearing agent of the invention, can effectively block the crack within 3mm, and under 150 DEG C of hot conditions, bearing capacity reaches 9MPa, be able to satisfy the requirement of the high pressure-bearing of long-time high temperature.The present invention can be used for ultradeep well deep high temperature mud stone and broken formation collapses when blocking microcrack, can block anti-collapse purpose from playing by chemical action, bearing capacity is strong, greatly prolongs collapse cycle, it is ensured that the safety of deep drilling.
Description
Technical field
The present invention relates to field of oil drilling, and in particular to a kind of oil drilling leak stopping pressure-bearing agent and preparation method thereof.
Background technique
During the exploration and development of oil and gas, leakage is that generally there is a phenomenon where especially in lime for one kind
Rock stratum, piedmont tectonic belts, because being crushed resulted in crustal stress collection, fracture formation, it is unavoidable to occur leakage when drilling well, and
And degree is often extremely serious.According to statistical data, global leakage incidence can about account for the 20~25% of drilling well sum,
And the processing of the especially complicated leakage of leakage is the Technology Difficulties problem in petroleum drilling operation again.Leak stopping practice have shown that, split
It is very big that the drilling fluid mistake property returned leakage post-processing difficulty occurs for seam, cavernous formation and macrovoid high-permeability reservoir.Such as with mountainous region
Eastern Sichuan Basin its severe well leakage based on matter form accounts for about the 10~20% of drilling well sum, but the damage of economy caused by severe mud losses
To account for causing damages by leakage 50% or more is lost, and leak stopping is difficult success, therefore in this stratum crushing rate in similar river east
Area high, leakage is frequent, leakage intensity is big, leakage have become the Pinch technology problem for restricting exploration and development progress.
Material currently used for processing leakage is predominantly following several: 1. (water is insoluble, strong with strong acid based on inert substance
Alkali etc. does not chemically react), it is common as walnut shell, rubber granule, diatomite, pitch, sawdust, asbestos fibre, flax fiber,
Mica sheet, husk and artificial synthetic resin's class sealing piece etc. can according to need individually or be used in combination.2. with diafiltration property material
The leakage-stop liquid that material, fibrous material, the high dehydration leak stopping agent material that diatomite is representative are configured to has very high infiltration capacity,
Under the action of pressure difference, liquid phase in system in a short time can a large amount of leak-offs, solid fraction simultaneously in rock surface accumulation, fill out
It fills, is then compacted, finally block leakage channel.3. with diesel oil bentonite slurry, shear-thickening liquid, barite plug etc. for representative
Soft, hard plug plugging material be formed by closure plug does not solidify, only by do not flow class paste thick substances closure drop ply, cork into
Enter crack later due to its huge flow resistance, can effectively limit the development of induced fractures, and when flaw size variation,
The shape and compression ratio of cork also change therewith, to remain good occupied state to leakage channel, are suitable for
The closure in various sizes crack.4. the inorganic gel blocking agent based on cement is 8~300mm's mainly for the treatment of fracture width
The leakage of dry, broken limestone and gravel layer.5. chemical plugging material use organic macromolecule bonding, coating and packet
Effect is wrapped up in, controls chemical reaction process under crosslinking agent existence condition, forms liquid for plugging after entering drop ply certain depth
Blocking, sandstone and limestone formation suitable for partial loss and the high osmosis sandstone layer of the mistake property returned leakage, fracture development.6. multiple
It is unknown mainly for the treatment of bad ground leakage such as water-bearing layer leakage, gas-bearing formation leakage, long section barefoot interval drop ply to close plugging material
Leakage and large fracture, cavern leakage, be mainly characterized by above-mentioned a variety of materials (except chemical plugging material) basis
Actual conditions carry out reasonable compatibility and form a kind of new compound leak stopping system, such as compound leak stopping method of high dehydration blocking agent~bridging agent,
The unidirectional item pressure seal agent~compound leak stopping method of bridging agent mixture, the uniaxial pressure sealer~compound leak stopping of high dehydration blocking agent mixture
Method, high dehydration blocking agent~bridge material~cementitious composite leak stopping method, the compound leak stopping method of diesel oil bentonite slurry~shielding diverting agent etc..
Furthermore to protect temporary stifled material, stratum shielding material based on oil and gas reservoir that can also be included in plugging material, but be mainly used for
Temporary blocking permeable formation protects reservoir to reduce permeability, and the consumption under recurrent state is not higher than 2m3Make when/h
It is preferable with effect, it is not used separately as sealing agent generally.
The utilization rate of chemical grout leakage stopping technology shows a increasing trend at present, but just total application effect is seen, including extraordinary water
Several chemical grout leak-stopping techniques including mud, which cannot realize barefoot interval, effectively to be blocked, and later pressure-bearing is especially blocked
Ability is unable to reach desired level, and the multiple probability for boring generation repeatability leakage later is higher, it is therefore necessary to find more efficient
Technical method.
Therefore, presently, there are the problem of be to be badly in need of researching and developing a kind of novel petroleum well drilling leak stopping pressure-bearing agent and its preparation
Method.
Summary of the invention
The technical problem to be solved by the present invention is to solve the above shortcomings of the prior art and to provide a kind of novel petroleum well drillings
With leak stopping pressure-bearing agent and preparation method thereof.Novel petroleum well drilling leak stopping pressure-bearing agent includes bentonite, elastic granule, oil-soluble
Resin, flake asbestos, filler, promotor, enhancing curing agent.Reaction can be completed in the leak stopping pressure-bearing agent at normal temperature, can be used for surpassing
When deep-well deep high temperature mud stone and broken formation collapsing block microcrack, which can play closure from by chemical action
Anti-collapse purpose, bearing capacity is strong, greatly prolongs collapse cycle, it is ensured that the safety of deep drilling.
For this purpose, the present invention provides a kind of leak stopping pressure-bearing agent of oil drilling, each component weight proportion for being included are as follows:
Bentonite: 30-45%
Elastic granule: 10-20%
Oil-soluble resin: 12-25%
Flake asbestos: 8% -15%
Filler: 5% -10%
Promotor: 1-5%
Enhance curing agent: 2-5%.
Heretofore described bentonitic partial size is 40-120 microns.
Heretofore described elastic granule is elastic rubber particle.
Heretofore described elastic rubber particle is butyronitrile rubber, polysulfide rubber, polybutadiene, chlorosulfonated polyethylene, gathers
One or more of etherimide, polyether Glycols carbonyl styrene-butadiene latex.
Heretofore described filler is precipitated calcium carbonate, calcium oxide, silicon powder, aluminium oxide, molybdenum disulfide, aluminium powder, two
One or more of silica, titanium dioxide, superfine powder of polytetrafluoroethylene, portland cement.
Heretofore described promotor is 2-methylimidazole urea, 2-ethyl-4-methylimidazole, imidazoles salt complex, 2-
Benzylimidazoline, imidazoles salt complex, resorcinol, bisphenol-A, phenol, metacresol, boron trifluoride complex, zinc naphthenate, three
One of Phenylphosphine, six phosphine of tricyclic.
Heretofore described enhancing curing agent is 2,2 bis- (3- amino-4-hydroxylphenyl) hexafluoropropane, diethylidene three
One of amine, trien, tetren, N aminoethyl piperazine.
The partial size of heretofore described flake asbestos is 20-300 microns, preferably 35-80 microns.
The leak stopping pressure-bearing agent of heretofore described oil drilling the preparation method comprises the following steps: at room temperature, will be described
Bentonite, elastic granule, oil-soluble resin, flake asbestos, filler, promotor, enhancing curing agent stir evenly, and 5-15 points of stirring
Clock obtains oil drilling leak stopping pressure-bearing agent.
Technical effect of the invention:
(1) oil drilling provided by the invention leak stopping pressure-bearing agent, can be with random drilling liquid system compatible use, use environment
Loosely, economic cost is low；
(2) oil drilling provided by the invention plays the role of crosslinking curing, pressure-bearing energy by chemical action with the agent of leak stopping pressure-bearing
Power is strong, strong with the active force of rock surface, and the duration for blocking efficiency is long, and collapse cycle is short, is conducive to underground construction, and raising is applied
The safety of work.
(3) oil drilling provided by the invention can effectively block the crack within 3mm with the agent of leak stopping pressure-bearing, in 150 DEG C of height
Under the conditions of temperature, bearing capacity reaches 9MPa, is able to satisfy the requirement of the high pressure-bearing of long-time high temperature.
Specific embodiment
To keep the present invention easier to understand, below in conjunction with embodiment, the present invention will be described in detail, these embodiments are only
Serve illustrative, it is not limited to application range of the invention.
Embodiment 1
By 18%, 30 micron of 50 microns of bentonite 30%, butyronitrile rubber particle 10%, polybutadiene particles 10%, epoxy resin stone
Cotton powder 15%, precipitated calcium carbonate 9%, 2-methylimidazole urea 4%, diethylenetriamines 4%.It is mixed 8 minutes at normal temperatures and pressures,
Obtain oil drilling leak stopping pressure-bearing agent.
Embodiment 2
By 20%, 103 micron of 41 microns of bentonite 32%, polysulfide rubber particle 12%, butyronitrile rubber particle 4%, epoxy resin stone
Cotton powder 13%, superfine powder of polytetrafluoroethylene 10%, imidazoles salt complex 4%, N- aminoethyl piperazine 5%.Mixing is stirred at normal temperatures and pressures
8 minutes are mixed to get oil drilling leak stopping pressure-bearing agent is arrived.
Embodiment 3
By 63 microns of bentonite 34%, butyronitrile rubber particle 15%, 25%, 85 micron of epoxy resin of flake asbestos 8%, polytetrafluoroethyl-ne
Alkene superfine powder 8%, 2-methylimidazole urea 5%, tetren 5%.It is mixed 8 minutes at normal temperatures and pressures to get petroleum is arrived
Drilling well leak stopping pressure-bearing agent.
Embodiment 4
By 58 microns of bentonite 41%, polybutadiene particles 13%, 22%, 131 micron of epoxy resin of flake asbestos 10%, silicate
Cement 7%, 2- benzylimidazoline 3%, tetren 4%.It is mixed 7 minutes at normal temperatures and pressures to get oil drilling is arrived
With leak stopping pressure-bearing agent.
Embodiment 5
By 81 microns of bentonite 38%, polybutadiene particles 11%, 21%, 163 micron of epoxy resin of flake asbestos 12%, silicate
Cement 9%, 2- benzylimidazoline 5%, tetren 4%.It is mixed 7 minutes at normal temperatures and pressures to get oil drilling is arrived
With leak stopping pressure-bearing agent.
Embodiment 6
By 110 microns of bentonite 40%, butyronitrile rubber particle 16%, 18%, 85 micron of epoxy resin of flake asbestos 14%, calcium oxide
6%, 2-methylimidazole urea 4%, tetren 2%.Mixing at normal temperatures and pressures 8 minutes stifled to get using to oil drilling
Leak pressure-bearing agent.
Embodiment 7
By 63 microns of bentonite 42%, butyronitrile rubber particle 18%, 15%, 102 micron of epoxy resin of flake asbestos 13%, polytetrafluoro
Bis- (3- amino-4-hydroxylphenyl) hexafluoropropane 3% of tetrafluoroethylene micropowder 5%, bisphenol-A 4%, 2,2-.It is mixed at normal temperatures and pressures
9 minutes to get arrive oil drilling leak stopping pressure-bearing agent.
Embodiment 8
By 48 microns of bentonite 45%, butyronitrile rubber particle 10%, 16%, 102 micron of epoxy resin of flake asbestos 13%, silicon powder
10%, bis- (3- amino-4-hydroxylphenyl) hexafluoropropane 2% of bisphenol-A 4%, 2,2-.Mixing 9 minutes at normal temperatures and pressures, i.e.,
Obtain oil drilling leak stopping pressure-bearing agent.
Embodiment 9
By 48 microns of bentonite 38%, butyronitrile rubber particle 20%, 14%, 102 micron of epoxy resin of flake asbestos 13%, silicon powder
8%, bis- (3- amino-4-hydroxylphenyl) hexafluoropropane 5% of bisphenol-A 4%, 2,2-.At normal temperatures and pressures be mixed 9 minutes to get
To oil drilling leak stopping pressure-bearing agent.
Embodiment 10
132 microns of bentonite 45%, butyronitrile rubber particle 19%, 12%, 102 micron of epoxy resin of flake asbestos 15%, silicon is micro-
Bis- (3- amino-4-hydroxylphenyl) hexafluoropropane 3% of powder 5%, bisphenol-A 1%, 2,2-.Mixing 9 minutes at normal temperatures and pressures, i.e.,
Obtain oil drilling leak stopping pressure-bearing agent.
Performance evaluation
The oil drilling of the present embodiment of 8wt% is added to base slurry (Huaian 4wt% bentonite, 0.3wt% with leak stopping pressure-bearing agent
Tackifier for drilling fluid 80A51,0.5wt% hydrolyzed polyacrylonitrile ammonium salt NPAN, 2wt% drilling fluid walchowite SPNH,
2wt% drilling fluid is with 1500mL leak stopping slurry is prepared into sulfonated gilsonite FT-1, excess water), for blocking the well of 1mm wide seam
Leakage.Closure experiment is carried out to above-mentioned sealing agent.Temperature is set as 150 DEG C, and different size is respectively adopted to above-mentioned case study on implementation
Wedge is tested.The closure consolidation time of embodiment 1-10 is tested first, after fully consolidated, with 0.5-
The speed of 1MPa/15min is slowly pressurizeed, and pressure keeps this pressure 4 hours after reaching 9Mpa.It the results are shown in Table 1.
1 evaluation result 1 of table
| Embodiment | Consolidation time/min | Gap board width/mm | 150 DEG C/4h bearing capacity/MPa |
| Embodiment 1 | 80 | 1 | 6.8 |
| Embodiment 2 | 90 | 2 | 7.5 |
| Embodiment 3 | 152 | 2 | 8.2 |
| Embodiment 4 | 210 | 3 | 9.0 |
| Embodiment 5 | 205 | 3 | 8.5 |
| Embodiment 6 | 202 | 3 | 8.1 |
| Embodiment 7 | 228 | 3 | 6.8 |
| Embodiment 8 | 150 | 2 | 8.3 |
| Embodiment 9 | 230 | 3 | 8.1 |
| Embodiment 10 | 220 | 2 | 8.6 |
The result shows that: oil drilling of the invention leak stopping pressure-bearing agent can effectively block the crack within 3mm, in 150 DEG C of high temperature
Under the conditions of, bearing capacity reaches 9MPa, is able to satisfy the requirement of the high pressure-bearing of long-time high temperature.
It should be noted that embodiment described above for explaining only the invention, is not constituted to of the invention any
Limitation.By referring to exemplary embodiments, invention has been described, it should be appreciated that word used in it is descriptive
With explanatory vocabulary, rather than limited vocabulary.The present invention can be made within the scope of the claims by regulation
Modification, and the present invention is revised in without departing substantially from scope and spirit of the present invention.Although the present invention described in it relates to
And specific method, material and embodiment, it is not intended that the present invention is limited to particular case disclosed in it, on the contrary, this hair
It is bright to can be extended to other all methods and applications with the same function.
Claims (10)
1. a kind of anti-collapse pressure-bearing agent of oil drilling, it is characterised in that each component weight proportion for being included are as follows:
Bentonite: 30-45%
Elastic granule: 10-20%
Oil-soluble resin: 12-25%
Flake asbestos: 8% -15%
Filler: 5% -10%
Promotor: 1-5%
Enhance curing agent: 2-5%.
2. a kind of anti-collapse pressure-bearing agent of oil drilling according to claim 1, which is characterized in that the bentonitic partial size
It is 40-120 microns.
3. a kind of anti-collapse pressure-bearing agent of oil drilling according to claim 1, which is characterized in that the elastic granule is bullet
Property rubber grain.
4. a kind of anti-collapse pressure-bearing agent of oil drilling according to claim 4, it is characterised in that the elastic rubber particle
For butyronitrile rubber particle, polysulfide rubber particle, polybutadiene particles, chlorosulfonated polyethylene particle, polyetherimide particle, polyethers
One or more of dihydric alcohol carbonyl butylbenzene particle.
5. a kind of anti-collapse pressure-bearing agent of oil drilling according to claim 1, which is characterized in that the filler is lightweight
Calcium carbonate, calcium oxide, silicon powder, aluminium oxide, molybdenum disulfide, aluminium powder, silica, titanium dioxide, superfine powder of polytetrafluoroethylene,
One or more of portland cement.
6. a kind of anti-collapse pressure-bearing agent of oil drilling according to claim 1, it is characterised in that the promotor is 2-
Methylimidazole urea, 2-ethyl-4-methylimidazole, imidazoles salt complex, 2- benzylimidazoline, imidazoles salt complex, isophthalic two
One of phenol, bisphenol-A, phenol, metacresol, boron trifluoride complex, zinc naphthenate, triphenylphosphine, six phosphine of tricyclic.
7. a kind of anti-collapse pressure-bearing agent of oil drilling according to claim 1, it is characterised in that the enhancing curing agent is
2,2- bis- (3- amino-4-hydroxylphenyl) hexafluoropropane, diethylenetriamines, trien, tetren, N- ammonia
One of ethyl piperazidine.
8. a kind of anti-collapse pressure-bearing agent of oil drilling according to claim 1, it is characterised in that the partial size of the flake asbestos is 20-
300 microns.
9. a kind of anti-collapse pressure-bearing agent of oil drilling according to claim 1, it is characterised in that the oil-soluble resin is epoxy
Resin.
10. a kind of anti-collapse pressure-bearing agent of oil drilling according to claim 1, it is characterised in that at room temperature, will
The bentonite, elastic granule, oil-soluble resin, flake asbestos, promotor, enhancing curing agent stir evenly, and 5-15 points of stirring
Clock obtains oil drilling leak stopping pressure-bearing agent.
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Application publication date: 20190503 |