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Lower hydrocarbon fracturing fluid gelling agent with polyalcohol synergism and preparation method thereof

A technology of low-carbon hydrocarbons and polyols, applied in the field of high-efficiency gelling agent synthesis, can solve the problems of continuous mixing on site and slow cross-linking rate, etc., and achieve excellent results, simple preparation, and broad application prospects

Inactive Publication Date: 2018-07-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the domestic market is concerned, low-carbon hydrocarbon fracturing fluids are still in the stage of laboratory research. The main problem is that the cross-linking rate is slow and it is difficult to meet the needs of continuous mixing on site.

Method used

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  • Lower hydrocarbon fracturing fluid gelling agent with polyalcohol synergism and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 48.50g of triethyl phosphate into a 250mL three-necked flask equipped with mechanical stirring and a thermometer, then add 29.20g of phosphorus pentoxide in three batches within 1 to 1.5 hours, react at 85°C for 5 hours, then cool down to room temperature. A polyphosphate intermediate is obtained. Add mixed alcohol (including 5.44g ethanol, 15.02g n-octanol, 26.63g n-hexadecyl alcohol and 0.95g dipentaerythritol) to the system, react at 95°C, add 3.76g aluminum chloride when reacting for 2 hours, and continue the reaction for 4 hours Finish the reaction, lower to room temperature to obtain polyol synergistic low-carbon hydrocarbon fracturing fluid gelling agent E 2％ , with a density of 1.06g / cm 3 .

Embodiment 2

[0030] Add 48.50g of triethyl phosphate into a 250mL three-necked flask equipped with mechanical stirring and a thermometer, then add 29.20g of phosphorus pentoxide in three batches within 1 to 1.5 hours, react at 85°C for 5 hours, then cool down to room temperature. A polyphosphate intermediate is obtained. Add mixed alcohols (including 5.44g ethanol, 15.02g n-octanol, 26.63g n-hexadecyl alcohol and 1.88g dipentaerythritol) to the system, react at 95°C, add 2.82g aluminum sulfate when reacting for 2h, continue to react for 4h Finish the reaction, lower to room temperature to obtain polyol synergistic low-carbon hydrocarbon fracturing fluid gelling agent E 4％ , with a density of 1.03g / cm 3 .

Embodiment 3

[0032] Add 48.50g of triethyl phosphate into a 250mL three-necked flask equipped with mechanical stirring and a thermometer, then add 29.20g of phosphorus pentoxide in three batches within 1 to 1.5 hours, react at 85°C for 5 hours, then cool down to room temperature. A polyphosphate intermediate is obtained. Add mixed alcohol (including 7.10g ethanol, 13.98g n-octanol, 26.01g n-hexadecyl alcohol and 1.17g dipentaerythritol) to the system, react at 95°C, add 0.88g aluminum sulfate when reacting for 2h, continue to react for 4h Finish the reaction, lower to room temperature to obtain polyol synergistic low-carbon hydrocarbon fracturing fluid gelling agent E 2.5％ , with a density of 1.01g / cm 3 .

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Abstract

The invention relates to a lower hydrocarbon fracturing fluid gelling agent with polyalcohol synergism and a preparation method thereof in the field of synthesis of high-efficiency gelling agents. Thelower hydrocarbon fracturing fluid gelling agent with polyalcohol synergism comprises a polyphosphoester intermediate and mixed alcohol, wherein the mixed alcohol comprises monohydric alcohol and dipentaerythritol; a weight part ratio of the polyphosphoester intermediate to the monohydric alcohol to the dipentaerythritol is 155-195 to 95-100 to 2-6. The lower hydrocarbon fracturing fluid gellingagent with polyalcohol synergism can further comprise a coupling agent. The polyalcohol synergist is added into the mixed alcohol in an extremely small amount, so that the cross-linking rate of the gelling agent can be greatly improved, and the gelling agent has a wide application prospect.

Description

technical field [0001] The invention relates to the field of high-efficiency gelling agent synthesis, and more particularly, relates to a low-carbon hydrocarbon fracturing fluid gelling agent synergized by polyalcohol and a preparation method thereof. Background technique [0002] At this stage, in the synthesis of low-carbon hydrocarbon fracturing fluid gelling agents, the use of polyols is rarely involved. Occasionally, they are also used as one of the components of mixed alcohols for phosphate esters together with ordinary monohydric alcohols. synthesis. The Chinese patent with publication number CN105154056A describes a preparation method and application of LPG anhydrous fracturing fluid suitable for unconventional reservoirs. It is prepared by esterification reaction of dihydric alcohol, polyhydric alcohol or its mixture under certain conditions. The preparation method of the phosphate gelling agent described in this patent is: (1) triethyl phosphate and phosphoric ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/64C08G79/04
CPCC08G79/04C09K8/64
Inventor 陈晨蒋廷学张旭东杜涛贾文峰
Owner CHINA PETROLEUM & CHEM CORP
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