Anhydrous fracturing fluid suitable for unconventional reservoir fracturing and preparing method of anhydrous fracturing fluid

A technology for waterless fracturing fluid and reservoir pressure, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of complex preparation process, slow gelation speed, poor temperature resistance, etc., and achieve simplified preparation Process, improved temperature resistance, good fluidity

Inactive Publication Date: 2014-08-27
XI'AN PETROLEUM UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The viscosity of the fracturing fluid prepared by this method is only about 50mPa·s at 70°C. The two-step gelation method is used to prepare the fracturing fluid. The preparation process is complicated, the gelation speed is slow, and the temperature resistance is poor, which cannot meet the pressure of shale gas wells. Requirements for fracturing fluid in fracturing construction

Method used

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  • Anhydrous fracturing fluid suitable for unconventional reservoir fracturing and preparing method of anhydrous fracturing fluid
  • Anhydrous fracturing fluid suitable for unconventional reservoir fracturing and preparing method of anhydrous fracturing fluid
  • Anhydrous fracturing fluid suitable for unconventional reservoir fracturing and preparing method of anhydrous fracturing fluid

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Embodiment 1

[0027] The anhydrous fracturing fluid suitable for shale gas layer fracturing in this embodiment is made of the following raw materials in mass percentage: 1.0% gelling agent, 2.0% micelle accelerator, 0.1% temperature stabilizer, and the balance is alkane base hydrocarbons; the temperature stabilizer is sulfamic acid, and the alkyl hydrocarbons are propane; the gelling agent is dialkyl iron phosphate, and the mixed alcohol in dialkyl iron phosphate includes methanol, n-hexanol and decathanol Diol, the mass percentage of methanol in the mixed alcohol is 25%, the mass percentage of n-hexanol is 70%, and the mass percentage of dodecanol is 5%; The preparation method of ionic organic complexes and micellar accelerators is as follows: react anhydrous ferric sulfate and oleic acid triethanolamine at 60°C for 3 hours, and then mix the reaction product with ethylene glycol monobutyl ether to obtain micellar accelerators. Agent, the mol ratio of oleic acid triethanolamine and iron ion...

Embodiment 2

[0033] The present embodiment is the same as Example 1, except that the temperature stabilizer used is dodecylbenzenesulfonic acid, and the alkyl hydrocarbons are butane or pentane, or are propane, butane and pentane At least two, low carbon alkanol is C 1 -C 4 At least two of the alkyl alcohols, or ethanol, propanol or butanol, the medium and long chain alkyl alcohol is C 6 -C 10 At least two of the alkyl alcohols, or C 7 -C 10 One of the alkyl alcohols, the long-chain alkyl alcohol is C 12 -C 16 At least two of the alkyl alcohols, or C 13 -C 16 One of the alkanols.

Embodiment 3

[0035] The anhydrous fracturing fluid suitable for shale gas layer fracturing in this embodiment is made of the following raw materials in mass percentage: 2.0% gelling agent, 4.0% micelle accelerator, 0.5% temperature stabilizer, and the balance is alkane base hydrocarbons; the temperature stabilizer is dodecylbenzenesulfonic acid, and the alkyl hydrocarbons are propane, butane and pentane (molar ratio 1:1:2); the gelling agent is dialkyl phosphoric acid Ester iron, the mixed alcohol in dialkyl phosphate iron comprises propanol, octanol and myristyl alcohol, and the mass percentage composition of propanol is 40% in the mixed alcohol, and the mass percentage composition of octanol is 40%, tetradecyl alcohol The mass percentage of alcohol is 20%; the micelle accelerator is an organic complex containing trivalent aluminum ions, and the preparation method of the micelle accelerator is: react aluminum chloride and triethanolamine oleate at 50°C 5h, then the reaction product is mix...

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Abstract

The invention discloses anhydrous fracturing fluid suitable for unconventional reservoir fracturing. The anhydrous fracturing fluid comprises, by mass, 1.0-2.0% of gelling agent, 2.0-4.0% of micelle accelerant, 0.1-0.5% of temperature stabilization agent and the balance alkyl hydrocarbon. The temperature stabilization agent is sulfamic acid or dodecylbenzene sulfonic acid, the alkyl hydrocarbon is one kind or more kinds of propane, butane and pentane, the gelling agent is dialkyl group phosphate ester iron, and the micelle accelerant is an organic complex containing trivalent metal ions. The invention further discloses a preparing method of the anhydrous fracturing fluid. The gelling agent is liquid at the normal temperature and is good in liquidity, the fracturing fluid is simple in preparing technology, the glue forming speed is controllable, the fracturing transformation of shale beds below 130 DEG C can be met, a gel breaker is not needed, the fracturing fluid is gasified under the formation temperature and the pressure and can be recycled after begin discharged out of the ground through a well pipe, external discharge and pollution of waste liquid are avoided, and the anhydrous fracturing fluid has the advantages of being environmentally friendly and the like.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to an anhydrous fracturing fluid suitable for unconventional reservoir fracturing and a preparation method thereof. Background technique [0002] In the 1990s, the development of foreign shale gas developed rapidly, and the technology gradually matured. According to statistics, the global shale gas resources are 456.24×10 12 m 3 , of which the shale gas resources in the United States reached 14×10 12 ~20×10 12 m 3 , The exploration and development of shale gas has increased the natural gas reserves of the United States by 40%. In 2010, shale gas production exceeded 15% of the total natural gas production, and unconventional shale gas has become one of the main gas sources in the United States. [0003] The core technology of shale gas exploitation is hydraulic fracturing. More than half of the natural gas in the United States is obtained through frac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/64
CPCC09K8/64
Inventor 王满学
Owner XI'AN PETROLEUM UNIVERSITY
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