CN106167699B - A kind of anhydrous fracturing fluid aluminum crosslinker of novel low carbon hydrocarbon and its preparation method and application - Google Patents
A kind of anhydrous fracturing fluid aluminum crosslinker of novel low carbon hydrocarbon and its preparation method and application Download PDFInfo
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- CN106167699B CN106167699B CN201610581378.4A CN201610581378A CN106167699B CN 106167699 B CN106167699 B CN 106167699B CN 201610581378 A CN201610581378 A CN 201610581378A CN 106167699 B CN106167699 B CN 106167699B
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- 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
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
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- 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
- C09K8/665—Compositions based on water or polar solvents containing inorganic compounds
Abstract
The invention proposes anhydrous fracturing fluid aluminum crosslinkers of a kind of novel low carbon hydrocarbon and its preparation method and application, and wherein aluminum crosslinker is mainly made of following substance according to mass fraction: 3-7 parts of host agent 20-27 crosslinking accelerator；45-60 parts of water.The preparation of crosslinking agent includes the following steps: that the water centainly matched is added in the reaction vessel；It adds host agent and stirs evenly reaction；Crosslinking accelerator is finally added to be stirred to react 15 minutes.This novel aluminum crosslinker with gelling agent crosslinking rate is fast, plastic is stable, preparation process is simple and convenient, low in cost, and fracturing fluid system have stronger heatproof shear resistant, to unconventional temperature reservoirs fracturing work have good effect.
Description
Technical field
The present invention relates to technical field of petroleum extraction, more particularly, to a kind of anhydrous fracturing fluid aluminum crosslinker of novel low carbon hydrocarbon
And its preparation method and application.
Background technique
High-grade energy of the oil and natural gas as national economy and social development holds guarantee national economy and society
Continuous fast development has very important significance.In recent years, with the rapid development of our country's economy, oil gas imbalance between supply and demand is more drilled more
Strong, crude oil import amount increases year by year.And conventional gas and oil resource is faced with production capacity seriously and reduces even exhausted problem, this is allowed for
Shale gas, coal bed gas, attention of the unconventional petroleum resources such as fine and close oil gas increasingly by whole world various countries.The unconventional oil in China
Gas resource very abundant, gross reserves are about twice of conventional gas and oil resource, have very big exploration prospect.Unconventional oil and gas reservoir
The core technology of exploitation is fracturing reform, and fracturing fluid is known as pressing as one of important component in pressing crack construction process
Split " blood ".The performance of fracturing fluid can also produce reservoir reconstruction effect after pressure break while determining pressing crack construction success or not
Raw strong influence.
In general, fracturing fluid should have, thermal stability is good, solid-carrying performance is good, frictional resistance is low, the row of returning leads height, residue is low, injury is small
The features such as, but since Unconventional reservoir physical property is poor, porosity, permeability are lower, are be easy to cause using conventional fracturing fluid
Water trapping injury is unfavorable for fracturing yield increasing, and traditional fracturing fluid heatproof anti-shear performance is poor, perishable, needs to consume big
Measure water resource, only seldom return and be discharged to ground and be safely handled, and relevant environment pollution problem caused by pressure break increasingly by
Pay attention to people.To solve the above problems, study and prepare the anhydrous fracturing fluid of novel low-carbon alkanes have it is vital
Effect.The anhydrous fracturing fluid of lower carbon number hydrocarbons is a kind of low-density developed on the basis of conventional oil base fracturing fluid, low-viscosity, low capillary pipe
The fracturing fluid system of resistance, have with Unconventional reservoir rock compatibility is good, pressure break is high-efficient, it is small to formation damage, take sand
The advantages that performance is good, the fracturing yield increasing suitable for untraditional reservoir.The technology not only can solve water shortage problem, moreover it is possible to reduce
Oil and gas reservoir develops pollution on the environment, has important directive significance to the exploitation of unconventional oil and gas reservoir.
Crosslinking agent is as the important additive of one of the anhydrous fracturing fluid system of lower carbon number hydrocarbons, and performance is to entire fracturing fluid
The cross-linking process of system has important influence.Crosslinking agent is by host agent, phase transfer catalyst, complexing agent and crosslinking accelerator group
At.Host agent is generally the heavy metallic salts such as ferric iron or titanium, nickel, has an effect after addition with gelling agent, with the shape of colloidal particle
Formula crosslinking is attached in alkyl gelling agent, and base fluid thickening is made to become frozen glue.Its space net structure can to the maximum extent with stone
Petroleum hydrocarbon molecule forms more stable supermolecule association objects system, has specific viscosity and macroscopic property.It grinds both at home and abroad at present
Study carefully and the anhydrous fracturing liquid cross-linking agent of lower carbon number hydrocarbons applied is mainly with Fe3+Metal salt is mainly used for oil base as host agent, trivalent aluminium salt
In fracturing fluid, usually directly trivalent iron salt is used to be crosslinked as crosslinking agent and dialkyl phosphate, cross-linking process is very
Slowly, cumbersome, it is complicated with liquid, it is difficult to control, crosslinking agent dissolubility is slow, stability is poor, and the requirement to pressing crack construction is special
It is not high.
Chinese patent CN104498017A discloses a kind of fracturing liquid cross-linking agent and its preparation and application, but this crosslinking agent
Fracturing fluid temperature tolerance obtained and prop-carrying capacity are not improved yet, and temperature tolerance only has 90 DEG C, do not adapt to high temperature oil field and
Ultra-deep Holes of Complicated Wells.Moreover, its crosslinker component is complicated, prepare cumbersome, uses alcohol and water as mixed solvent, field operation exists
Some potential safety problems.
Summary of the invention
The present invention proposes a kind of anhydrous fracturing fluid aluminum crosslinker of novel low carbon hydrocarbon and its preparation method and application, this anhydrous
Fracturing liquid cross-linking agent with gelling agent crosslinking rate is fast, plastic is stable, preparation process is simple and convenient, low in cost, and fracturing liquid
It is that temperature resistance anti-shear ability is strong, it is ideal for temperature reservoirs fracturing effect.
A kind of technical solution of the invention is achieved in that a kind of anhydrous fracturing fluid aluminum crosslinker of novel low carbon hydrocarbon, institute
It states fracturing liquid cross-linking agent and is made of following substance according to mass fraction:
20-27 parts of host agent；
3-7 parts of crosslinking accelerator；
45-60 parts of water.
As a kind of perferred technical scheme, the host agent is one in aluminum sulfate, aluminium chloride, aluminum nitrate and sodium metaaluminate
Kind or several mixtures.
As a kind of perferred technical scheme, the crosslinking accelerator be ethanol amine, triethylene tetramine, diethylenetriamine,
One or several kinds of mixtures of N, N- dimethylated propyl diethylenetriamine and isopropanolamine.
Another technical solution of the invention is achieved in that a kind of anhydrous fracturing fluid aluminum crosslinker of novel low carbon hydrocarbon
Preparation method includes the following steps:
(1) water centainly matched is added in the reaction vessel；
(2) it adds a certain amount of host agent and stirs evenly reaction；
(3) crosslinking accelerator is eventually adding to be stirred to react 15 minutes.
Another technical solution of the invention is achieved in that a kind of anhydrous fracturing fluid aluminum crosslinker of novel low carbon hydrocarbon
Using the anhydrous fracturing liquid cross-linking agent of lower carbon number hydrocarbons can be cross-linked to form fracturing fluid jelly with phosphate gelling agent and lower carbon number hydrocarbons alkane
Glue.
As a kind of perferred technical scheme, include the following steps:
(1) phosphate gelling agent is added in lower carbon number hydrocarbons alkane sufficiently dissolution；
(2) fracturing liquid cross-linking agent is added in mixing base fluid described in step (1) and stirs two with mechanical agitator
Minute can be prepared by the anhydrous fracturing fluid gel of novel low carbon hydrocarbon.
As a kind of perferred technical scheme, the mass ratio of the fracturing liquid cross-linking agent and the phosphate gelling agent is 1:
1.1-1:1.4；Phosphate gelling agent mass percentage in lower carbon number hydrocarbons is 3%-7%.
As a kind of perferred technical scheme, the lower carbon number hydrocarbons is the alkane that carbon atom number is 4-8.
As a kind of perferred technical scheme, the lower carbon number hydrocarbons is pentane or hexane.
Using above-mentioned technical proposal, the invention has the benefit that
(1) crosslinking accelerator in the crosslinking agent can accelerate the formation of metal cation complex and appoint without being added
What alcohols double solvents reduces operating cost, it is easier to achieve the purpose that industrialized production.
(2) crosslinking agent preparation process is simple, and raw material is cheap, and preparation time is short, can matching while using at any time, and can be with
Crosslinking time is greatly shortened within two minutes.
(3) for the pressure break lyogel at 150 DEG C, 2MPa or more high pressure fracturing fluid viscosity still can reach 50mPas, complete
Full up foot pressing crack construction standard, fracturing fluid system has stronger temperature resistance shear resistant and takes husky performance, to live pressing crack construction
With important practical significance.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is to utilize crosslinking agent obtained in embodiment 1 and phosphate the gelling agent pressure break that in pentane prepared by plastic
The liquid system heatproof curve that viscosity changes over time at 120 DEG C；
Fig. 2 is to utilize crosslinking agent obtained in embodiment 2 and phosphate the gelling agent pressure break that in n-hexane prepared by plastic
The liquid system resistant to shearing curve that viscosity changes over time at 150 DEG C.
Fig. 3 is to utilize crosslinking agent obtained in embodiment 1 and phosphate the gelling agent pressure break that in pentane prepared by plastic
Lyogel gel structure figure observed under scanning electron microscope.
Wherein:
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
It takes 45 parts of water to be added in the beaker of 250mL, and is placed on magnetic stirring apparatus, it is anti-that 20 parts of aluminum sulfate stirrings are added
It answers 10 minutes, being eventually adding 3 parts of isopropanolamines and being stirred to react 15 minutes can be prepared by novel crosslinker.
Embodiment 2:
It takes 52 parts of water to be added in the beaker of 250mL, and is placed on magnetic stirring apparatus, add 25 parts of aluminium chloride stirrings
Reaction 10 minutes, being eventually adding 6 parts of ethanol amines and being stirred to react 15 minutes can be prepared by novel crosslinker.
Embodiment 3:
It takes 60 parts of water to be added in the beaker of 250mL, and is placed on magnetic stirring apparatus, add 27 parts of aluminum nitrate stirrings
Reaction 10 minutes, being eventually adding 7 parts of triethylene tetramines and being stirred to react 15 minutes can be prepared by novel crosslinker.
Embodiment 4:
It is added in pentane and hands over according to the phosphate gelling agent of crosslinking agent dosage 4% made from embodiment 1 and dosage 5%
Join (referring to patent of invention US4877894, US7328744, US5614010 etc., the preparation method of the anhydrous fracturing fluid of lower carbon number hydrocarbons), hands over
Fracturing fluid gel has good viscoplasticity and apparent viscosity after connection.Then in III type high temperature and pressure rotational rheometer of Mars,
Test the heatproof endurance of cutting of pressure break lyogel.As the result is shown in 120 DEG C of constant temperature, 170s-1Under revolving speed, persistently 2h is sheared (i.e.
120min), viscosity is able to maintain in 100mPas or more；In 170s-1Under revolving speed, in 50min, 150 DEG C are gradually heated to, is investigated
Its endurance of cutting energy, as the temperature rises, the viscosity of pressure break lyogel is gradually reduced；When temperature is increased to 150 DEG C, pressure break
The viscosity of lyogel can also reach 50mPas, and (referring to Fig. 1, Fig. 2) meets professional standard.In addition, to the knot of pressure break lyogel
Structure is investigated, and is placed on being observed under 450 type environmental scanning electron microscope of Quanta, (referring to Fig. 3) discovery,
Complicated tridimensional network is formd inside pressure break lyogel, so that gel molecular becomes a kind of stable supermolecule association
Object, and there is specific viscosity and macroscopic property, meet expected imagination.Show that fracturing fluid gel has and takes husky effect well
Fruit can fully meet fracturing work requirement.
Embodiment 5:
According to the phosphate gelling agent of crosslinking agent dosage 4% and 6% prepared by embodiment 2,3 and n-hexane is added respectively
Crosslinking preparation pressure break lyogel (with embodiment 4), fracturing fluid gel has good viscoplasticity and apparent viscosity after crosslinking.Then
Investigate the heatproof endurance of cutting of fracturing fluid gel rubber system.In III type high temperature and pressure rotational rheometer of Mars, carry out that heatproof is resistance to cuts
The test of cutting property.As the result is shown in 90 DEG C of constant temperature, 170s-12h (i.e. 120min) is persistently sheared under revolving speed, and viscosity can be kept at afterwards
460mPas and 520mPas or more, when temperature is increased to 150 DEG C, the viscosity of two kinds of pressure break lyogels can still be maintained
70mPas or more.Show that the fracturing fluid gel has and take husky effect well, fracturing work requirement can be fully met.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (1)
1. a kind of anhydrous fracturing fluid aluminum crosslinker of novel low carbon hydrocarbon, it is characterised in that: the fracturing liquid cross-linking agent is by following substance
It is formed according to mass fraction: 20-27 parts of host agent；3-7 parts of crosslinking accelerator；45-60 parts of water, the host agent is aluminum sulfate, chlorination
One of aluminium, aluminum nitrate and sodium metaaluminate or several mixtures, the crosslinking accelerator are ethanol amine, triethylene four
One or several kinds of mixtures of amine, diethylenetriamine, N, N- dimethylated propyl diethylenetriamine and isopropanolamine, include the following steps:
(1) water centainly matched is added in the reaction vessel；
(2) it adds a certain amount of host agent and stirs evenly reaction；
(3) crosslinking accelerator is eventually adding to be stirred to react 15 minutes；
The anhydrous fracturing liquid cross-linking agent of lower carbon number hydrocarbons can be cross-linked to form fracturing fluid jelly with phosphate gelling agent and lower carbon number hydrocarbons alkane
Glue；Include the following steps:
(1) phosphate gelling agent is added in lower carbon number hydrocarbons alkane sufficiently dissolution；
(2) fracturing liquid cross-linking agent is added in mixing base fluid described in step (1) and is stirred two minutes with mechanical agitator
It can be prepared by the anhydrous fracturing fluid gel of novel low carbon hydrocarbon；The mass ratio of the fracturing liquid cross-linking agent and the phosphate gelling agent is
1:1.1-1:1.4；Phosphate gelling agent mass percentage in lower carbon number hydrocarbons is 3%-7%；The lower carbon number hydrocarbons is that carbon is former
Subnumber is the alkane of 4-8；The lower carbon number hydrocarbons is pentane or hexane.
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| CN106905360A (en) * | 2017-04-07 | 2017-06-30 | 西南石油大学 | One-step synthesis phosphate gelling agent and the method for preparing the anhydrous fracturing fluid of lower carbon number hydrocarbons |
| CN108300449A (en) * | 2018-03-16 | 2018-07-20 | 中国石油大学(华东) | A kind of ethers fracturing fluid |
| CN113755151A (en) * | 2021-10-25 | 2021-12-07 | 郑州市新郑梅久实业有限公司 | Novel high-temperature-resistant nano composite zirconium cross-linking agent and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104004506A (en) * | 2014-06-18 | 2014-08-27 | 西安石油大学 | Anhydrous fracturing fluid suitable for unconventional reservoir fracturing and preparing method of anhydrous fracturing fluid |
| CN104498017A (en) * | 2014-12-22 | 2015-04-08 | 中国石油天然气股份有限公司 | Fracturing fluid cross-linking agent and preparation method and application thereof |
| CN105062458A (en) * | 2015-09-02 | 2015-11-18 | 西南石油大学 | Preparation and application of low-hydrocarbon anhydrous fracturing fluid crosslinking agent for unconventional reservoirs |
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| US7163060B2 (en) * | 2004-11-09 | 2007-01-16 | Halliburton Energy Services, Inc. | Difunctional phosphorus-based gelling agents and gelled nonaqueous treatment fluids and associated methods |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104004506A (en) * | 2014-06-18 | 2014-08-27 | 西安石油大学 | Anhydrous fracturing fluid suitable for unconventional reservoir fracturing and preparing method of anhydrous fracturing fluid |
| CN104498017A (en) * | 2014-12-22 | 2015-04-08 | 中国石油天然气股份有限公司 | Fracturing fluid cross-linking agent and preparation method and application thereof |
| CN105062458A (en) * | 2015-09-02 | 2015-11-18 | 西南石油大学 | Preparation and application of low-hydrocarbon anhydrous fracturing fluid crosslinking agent for unconventional reservoirs |
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