CN106047332A - Emulsion drag reducing agent for increasing yield of shale oil-gas field and preparation method thereof - Google Patents
Emulsion drag reducing agent for increasing yield of shale oil-gas field and preparation method thereof Download PDFInfo
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- CN106047332A CN106047332A CN201610488115.9A CN201610488115A CN106047332A CN 106047332 A CN106047332 A CN 106047332A CN 201610488115 A CN201610488115 A CN 201610488115A CN 106047332 A CN106047332 A CN 106047332A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
- C09K8/88—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/90—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/28—Friction or drag reducing additives
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Abstract
The invention discloses an emulsion drag reducing agent for increasing yield of a shale oil-gas field and a preparation method thereof. The emulsion drag reducing agent is prepared from the following raw materials in percentage by weight: 0.5-0.7% of sodium carboxymethylcellulose, 7-9% of polyurethane, 4-6% of an emulsifying agent, 8-12% of an organic solvent and balance of water. The preparation method of the emulsion drag reducing agent comprises the following steps: (1) adding water into a reaction kettle, heating to 55-60 DEG C, slowly adding the polyurethane, and stirring until the polyurethane is completely dissolved; (2) cooling the obtained polyurethane solution until temperature is not higher than 30 DEG C, then adding the emulsifying agent and the organic solvent, stirring, and uniformly mixing; and (3) finally slowly adding sodium carboxymethylcellulose, and stirring until the sodium carboxymethylcellulose is completely dissolved, so that the product emulsion drag reducing agent is obtained. The emulsion drag reducing agent disclosed by the invention has the beneficial effects that firstly the emulsion drag reducing agent can effectively reduce frictional resistance of fluid; and secondly compatibility between the emulsion drag reducing agent and a fracturing fluid additive is good.
Description
Technical field
The present invention relates to drag reducer of a kind of shale oil gas field volume increase and preparation method thereof, especially a kind of emulsion drag reduction
Agent and preparation method thereof, belongs to shale oil gas field volume increase agent technical field.
Background technology
Fracture acidizing is the well stimulation that shale oil gas field development is main.The most domestic exploitation hidden for unconventionaloil pool
General layout is very big, and huge discharge seam net pressure break is the main trend that unconventionaloil pool hides volume increase, enters well in the fracturing process of huge discharge
The frictional resistance Resolving probiems of liquid is too the most impatient to wait, such as In Southwest China shale gas oil-gas reservoir buried depth typically 3500～
About 5000m, the particularly shale gas reservoir with middle petrochemical industry Jiao's masonry dam as representative, need to improve gas by the seam net pressure break of huge discharge
Well production.But due to oil reservoir bury deeply, formation temperature high, in huge discharge fracturing process, fracturing fluid frictional resistance is higher, is set by ground
Standby infusion ability and the restriction of the pressure-bearing limit, stimulation treatment process parameter receives certain restriction.Such as degree of depth 4500m
Reservoir, bottom-hole treating pressure is at about 100MPa, if not taking Drag reduction devices, uses at present conventional fracturing fluid system ground
Operation pressure is up to about 100MPa, substantially beyond the limit of fracturing unit.
Therefore the frictional resistance of fracturing fluid system must be reduced, so that well stimulation can be implemented smoothly.
Summary of the invention
The goal of the invention of the present invention is: hiding in fracturing process for above-mentioned for unconventionaloil pool, fracturing fluid frictional resistance is high
Problem, it is provided that a kind of emulsion drag reducer reducing fracturing fluid frictional resistance, this drag reducer can effectively reduce the frictional resistance of fracturing fluid, with
Time can be applicable to ultra-deep superhigh temperature reservoir and shale air cleft net pressure break, and join with other additives of conventional fracturing fluid system
5 property are good.
The technical solution used in the present invention is as follows:
Emulsion drag reducer is used in the volume increase of a kind of shale oil gas field, and raw material comprises following components by weight percentage: carboxymethyl is fine
Dimension element sodium 0.5～0.7%, polyurethanes 7～9%, emulsifying agent 4～6%, organic solvent 8～12%, its surplus is water；
And prepare by the following method:
(1) after adding water to be heated to 55～60 DEG C in reactor, being slowly added to by polyurethanes, stirring treats that it is the most molten
Solve；
(2), after gained polyurethane solution is cooled to no more than 30 DEG C, adds emulsifying agent and organic solvent, and stir mixed
Close uniformly；
(3) being finally slowly added to sodium carboxymethyl cellulose, stirring is completely dissolved and i.e. prepares product emulsion-type drag reducer.
Further, raw material comprises following components by weight percentage: sodium carboxymethyl cellulose 0.6%, poly-amino
Formic acid esters 8%, emulsifying agent 5%, organic solvent 10%, its surplus is water.
The molecular weight of described sodium carboxymethyl cellulose is 2,500,000, and the molecular weight of described polyurethanes is 300,000.
Described emulsifying agent is dodecyl sodium sulfate, Dodecyl trimethyl ammonium chloride, acrylyl oxy-ethyl-trimethyl chlorine
Change ammonium, sorbitan monooleate polyoxyethylene ether (Tween80), alkylphenol polyoxyethylene (0P-10), expoxy propane benzene
One or more in base ether, Triton X-100 (triton x-100), epoxypropyltrimethylchloride chloride.
Described organic solvent is one or more in methanol, ethanol, acetone.
The preparation method of a kind of shale oil gas field volume increase emulsion drag reducer, by following steps: (1) adds water to
After reactor is heated to 55～60 DEG C, polyurethanes is slowly added to, under stirring, treats that it all dissolves；(2) gained gathers
After carbamate solution is cooled to no more than 30 DEG C, adds emulsifying agent and organic solvent, and be uniformly mixed；(3)
After be slowly added to sodium carboxymethyl cellulose, stirring is completely dissolved and i.e. prepares product emulsion-type drag reducer；Described raw material is by weight
Meter: sodium carboxymethyl cellulose 0.5～0.7%, polyurethanes 7～9%, emulsifying agent 4～6%, organic solvent 8～12%,
Its surplus is water.
Further, described raw material is by weight: sodium carboxymethyl cellulose 0.6%, polyurethanes 8%, emulsifying
Agent 5%, organic solvent 10%, its surplus is water.
The molecular weight 2,500,000 of described sodium carboxymethyl cellulose, the molecular weight of described polyurethanes is 300,000.
Described emulsifying agent is dodecyl sodium sulfate, Dodecyl trimethyl ammonium chloride, acrylyl oxy-ethyl-trimethyl chlorine
Change ammonium, sorbitan monooleate polyoxyethylene ether (Tween80), alkylphenol polyoxyethylene (0P-10), expoxy propane benzene
One or more in base ether, Triton X-100 (triton x-100), epoxypropyltrimethylchloride chloride.
Described organic solvent is one or more in methanol, ethanol, acetone.
The shale oil gas field volume increase of the present invention is used emulsion drag reducer, sodium carboxymethyl cellulose therein to rise in fracturing fluid to subtract
There is not reaction in the effect of resist, polyurethanes and fracturing liquid cross-linking agent, bi-material can ensure that and adding fracturing fluid
After can effectively in continuous phase dispersion in a fluid, owing to fracturing fluid flow at high speed in tubing string is turbulence characteristic, therefore
The Reynolds number of liquid itself is the most key, and sodium carboxymethyl cellulose is by distinctive viscoelasticity itself, and molecule long-chain following current is to nature
Extending in stream shape, its infinitesimal directly affects the motion of fluid infinitesimal, and the radial forces from fluid infinitesimal acts on drag reducer
On infinitesimal so that it is be distorted, rotational deformation；It is micro-that the drag reducer intermolecular gravitation above-mentioned active force of opposing reacts on fluid
Unit, changes the action direction of fluid infinitesimal and size, make a part of radial force be converted into following current to axial force, thus reduce
The consumption of idle work, thus macroscopically serving the good result of reducing friction resistance loss.Along with Reynolds number increase into
Entering turbulent flow, drag reducer just manifests drag reduction effect, and the biggest drag-reduction effect of Reynolds number is the most obvious.Described emulsifying agent effect is mainly protected
Card system self and effective dispersion mixed with fracturing fluid, organic solvent is to ensure that the dissolubility of system.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
(1) described emulsion drag reducer can be effectively reduced the frictional resistance of fluid, according to measuring, uses 0.5～1.5%
The drag reducer of the present invention can reduce the frictional resistance 75～80% of clear water, and drag-reduction effect is directly proportional to drag reducer concentration in this range
Relation；
(2) described emulsion drag reducer is good with fracturing fluid additive compatibility, and general fracturing fluid additive includes thickening agent, the row of helping
Agent, expansion-resisting agent, demulsifier, PH regulator and the material such as cross-linking agent, gel breaker, laboratory experiment show the drag reducer of the present invention with
Above-mentioned additive compatibility is good.
Detailed description of the invention
All features disclosed in this specification, or disclosed all methods or during step, except mutually exclusive
Feature and/or step beyond, all can combine by any way.
Any feature disclosed in this specification, unless specifically stated otherwise, all can by other equivalence or there is similar purpose
Alternative features is replaced.I.e., unless specifically stated otherwise, an example during each feature is a series of equivalence or similar characteristics
?.
The shale oil gas field volume increase of the present invention uses emulsion drag reducer, each raw material to be commercially available.
Embodiment 1
Emulsion drag reducer is used in the shale oil gas field volume increase of the present embodiment, is prepared by following steps: 805kg water is added reactor
In be heated to 55 DEG C after, 70kg polyurethanes is slowly added to, under stirring, treats that it all dissolves；(2) gained poly-amino first
After acid esters solution is cooled to 30 DEG C, add 40kg emulsifying agent Dodecyl trimethyl ammonium chloride and 80kg organic solvent methanol,
And be uniformly mixed；(3) being finally slowly added to 5kg sodium carboxymethyl cellulose, stirring is completely dissolved and i.e. prepares product emulsion-type
Drag reducer.
Wherein, the molecular weight 2,500,000 of described sodium carboxymethyl cellulose, the molecular weight of described polyurethanes is 300,000.
This emulsion drag reducer outward appearance synthesized is creamy white cream liquid, the breakdown of emulsion time 10 under agitator 500 rotating speed
Second, concentration is that this drag reducer solution drag reducing efficiency of 0.1% is up to 85%.
Embodiment 2
Emulsion drag reducer is used in the shale oil gas field volume increase of the present embodiment, is prepared by following steps: 805kg water is added reactor
In be heated to 55 DEG C after, 70kg polyurethanes is slowly added to, under stirring, treats that it all dissolves；(2) gained poly-amino first
After acid esters solution is cooled to 30 DEG C, add 40kg emulsifying agent acrylyl oxy-ethyl-trimethyl salmiac and 80kg organic solvent first
Alcohol, and be uniformly mixed；(3) being finally slowly added to 5kg sodium carboxymethyl cellulose, stirring is completely dissolved and i.e. prepares product emulsion
Drag reducer.
Wherein, the molecular weight 2,500,000 of described sodium carboxymethyl cellulose, the molecular weight of described polyurethanes is 300,000.
This emulsion-type drag reducer outward appearance synthesized is creamy white cream liquid, the breakdown of emulsion time under agitator 500 rotating speed
12 seconds, concentration was that this drag reducer solution drag reducing efficiency of 0.1% is up to 78%.
Embodiment 3
Emulsion drag reducer is used in the shale oil gas field volume increase of the present embodiment, is prepared by following steps: 764kg water is added reactor
In be heated to 58 DEG C after, 80kg polyurethanes is slowly added to, under stirring, treats that it all dissolves；(2) gained poly-amino first
After acid esters solution is cooled to 28 DEG C, add 50kg emulsifying agent sorbitan monooleate polyoxyethylene ether (Tween80) and
100kg organic solvent ethanol, and be uniformly mixed；(3) finally it is slowly added to 6kg sodium carboxymethyl cellulose, stirs the most molten
Solution i.e. prepares product emulsion drag reducer.
Wherein, the molecular weight 2,500,000 of described sodium carboxymethyl cellulose, the molecular weight of described polyurethanes is 300,000.
This emulsion drag reducer outward appearance synthesized is creamy white cream liquid, the breakdown of emulsion time 15 under agitator 500 rotating speed
Second, concentration is that this drag reducer solution drag reducing efficiency of 0.1% is up to 75%.
Embodiment 4
Emulsion drag reducer is used in the shale oil gas field volume increase of the present embodiment, is prepared by following steps: 723kg water is added reactor
In be heated to 60 DEG C after, 90kg polyurethanes is slowly added to, under stirring, treats that it all dissolves；(2) gained poly-amino first
After acid esters solution is cooled to 25 DEG C, adds 60kg emulsifying agent expoxy propane phenyl ether and 120kg organic solvent-acetone, and stir
Mix homogeneously；(3) being finally slowly added to 7kg sodium carboxymethyl cellulose, stirring is completely dissolved and i.e. prepares product emulsion drag reducer.
Wherein, the molecular weight 2,500,000 of described sodium carboxymethyl cellulose, the molecular weight of described polyurethanes is 300,000.
This emulsion drag reducer outward appearance synthesized is creamy white cream liquid, the breakdown of emulsion time 12 under agitator 500 rotating speed
Second, concentration is that this drag reducer solution drag reducing efficiency of 0.1% is up to 78%.
Embodiment 5
Emulsion drag reducer is used in the shale oil gas field volume increase of the present embodiment, is prepared by following steps: 764kg water is added reactor
In be heated to 55 DEG C after, 80kg polyurethanes is slowly added to, under stirring, treats that it all dissolves；(2) gained poly-amino first
After acid esters solution is cooled to 28 DEG C, add 50kg emulsifying agent epoxypropyltrimethylchloride chloride and 100kg organic solvent ethanol,
And be uniformly mixed；(3) being finally slowly added to 6kg sodium carboxymethyl cellulose, stirring is completely dissolved and i.e. prepares product emulsion and subtract
Resist.
Wherein, the molecular weight 2,500,000 of described sodium carboxymethyl cellulose, the molecular weight of described polyurethanes is 300,000.
This emulsion drag reducer outward appearance synthesized is creamy white cream liquid, the breakdown of emulsion time 12 under agitator 500 rotating speed
Second, concentration is that this drag reducer solution drag reducing efficiency of 0.1% is up to 75%.
The emulsion drag reducer of the present invention can be effectively reduced the frictional resistance of fluid, according to measuring, use 0.5～
The drag reducer of 1.5% present invention can reduce the frictional resistance 75～80% of clear water, in this range drag-reduction effect and drag reducer concentration
Proportional；Described emulsion drag reducer and fracturing fluid additive compatibility are good, general fracturing fluid additive include thickening agent,
Cleanup additive, expansion-resisting agent, demulsifier, PH regulator and the material such as cross-linking agent, gel breaker, laboratory experiment shows the drag reduction of the present invention
Agent is good with above-mentioned additive compatibility.
The invention is not limited in aforesaid detailed description of the invention.The present invention expands to any disclose in this manual
New feature or any new combination, and the arbitrary new method that discloses or the step of process or any new combination.
Claims (10)
1. an emulsion drag reducer is used in the volume increase of shale oil gas field, and raw material comprises following components by weight percentage: carboxymethyl
Sodium cellulosate 0.5～0.7%, polyurethanes 7～9%, emulsifying agent 4～6%, organic solvent 8～12%, its surplus is
Water；And prepare by the following method:
(1) after adding water to be heated to 55～60 DEG C in reactor, being slowly added to by polyurethanes, stirring treats that it is the most molten
Solve；
(2), after gained polyurethane solution is cooled to no more than 30 DEG C, adds emulsifying agent and organic solvent, and stir mixed
Close uniformly；
(3) being finally slowly added to sodium carboxymethyl cellulose, stirring is completely dissolved and i.e. prepares product emulsion-type drag reducer.
Volume increase emulsion drag reducer in shale oil gas field the most according to claim 1, it is characterised in that raw material comprises by weight
The following components of percentages: sodium carboxymethyl cellulose 0.6%, polyurethanes 8%, emulsifying agent 5%, organic solvent
10%, its surplus is water.
Volume increase emulsion drag reducer in shale oil gas field the most according to claim 1 and 2, it is characterised in that described carboxymethyl
The molecular weight of sodium cellulosate is 2,500,000, and the molecular weight of described polyurethanes is 300,000.
Volume increase emulsion drag reducer in shale oil gas field the most according to claim 1 and 2, it is characterised in that described emulsifying agent
For dodecyl sodium sulfate, Dodecyl trimethyl ammonium chloride, acrylyl oxy-ethyl-trimethyl salmiac, anhydrous sorbitol list oil
Acid ester polyoxyethylene ether (Tween80), alkylphenol polyoxyethylene (0P-10), expoxy propane phenyl ether, Polyethylene Glycol octyl group benzene
One or more in base ether (triton x-100), epoxypropyltrimethylchloride chloride.
Volume increase emulsion drag reducer in shale oil gas field the most according to claim 1 and 2, it is characterised in that described organic molten
Agent is one or more in methanol, ethanol, acetone.
6. the shale oil gas field volume increase preparation method of emulsion drag reducer, it is characterised in that comprise the following steps:
(1) after adding water to reactor is heated to 55～60 DEG C, polyurethanes is slowly added to, under stirring, treats that they are whole
Dissolve；
(2), after gained polyurethane solution is cooled to no more than 30 DEG C, adds emulsifying agent and organic solvent, and stir mixed
Close uniformly；
(3) being finally slowly added to sodium carboxymethyl cellulose, stirring is completely dissolved and i.e. prepares product emulsion-type drag reducer；Described raw material
By weight: sodium carboxymethyl cellulose 0.5～0.7%, polyurethanes 7～9%, emulsifying agent 4～6%, organic solvent 8
～12%, its surplus is water.
The preparation method of volume increase emulsion drag reducer in shale oil gas field the most according to claim 6, it is characterised in that described
Raw material is by weight: sodium carboxymethyl cellulose 0.6%, polyurethanes 8%, emulsifying agent 5%, organic solvent 10%, its
Surplus is water.
8. according to the preparation method of emulsion drag reducer of the shale oil gas field volume increase described in claim 6 or 7, it is characterised in that
The molecular weight 2,500,000 of described sodium carboxymethyl cellulose, the molecular weight of described polyurethanes is 300,000.
9. according to the preparation method of emulsion drag reducer of the shale oil gas field volume increase described in claim 6 or 7, it is characterised in that
Described emulsifying agent is dodecyl sodium sulfate, Dodecyl trimethyl ammonium chloride, acrylyl oxy-ethyl-trimethyl salmiac, dehydration
Sorbitol monooleate polyoxyethylene ether (Tween80), alkylphenol polyoxyethylene (0P-10), expoxy propane phenyl ether, poly-second
One or more in glycol octyl phenyl ether (triton x-100), epoxypropyltrimethylchloride chloride.
10. according to the preparation method of emulsion drag reducer of the shale oil gas field volume increase described in claim 6 or 7, it is characterised in that
Described organic solvent is one or more in methanol, ethanol, acetone.
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| CN201610488115.9A CN106047332A (en) | 2016-06-28 | 2016-06-28 | Emulsion drag reducing agent for increasing yield of shale oil-gas field and preparation method thereof |
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Application publication date: 20161026 |