Guanidine gum fracturing fluid system prepared by using heavy oil thermal recovery water and preparation method of fracturing fluid system

A technology for guar gum fracturing fluid and thermal recovery of heavy oil, which is applied in chemical instruments and methods, drilling compositions and other directions, can solve problems such as poor performance and the inability of fracturing fluid to meet large-scale applications, and solve disposal problems , the effect of alleviating the demand for water resources and having broad application prospects

Active Publication Date: 2019-05-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main purpose of the present invention is to provide a guar gum fracturing fluid system prepared by using heavy oil thermal recovery water and its preparation method, so as to solve the problem that the existing fracturing fluid cannot meet the large-scale application or poor performance technology

Method used

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  • Guanidine gum fracturing fluid system prepared by using heavy oil thermal recovery water and preparation method of fracturing fluid system
  • Guanidine gum fracturing fluid system prepared by using heavy oil thermal recovery water and preparation method of fracturing fluid system

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preparation example Construction

[0033] Another aspect of the present application provides a kind of preparation method of above-mentioned guar gum fracturing fluid system, and this preparation method comprises: the ion chelating agent and the cross-linking retardant are respectively prepared into the solution that weight fraction is 5%, obtains 5% Ion chelating agent solution and 5% crosslinking retarder solution; according to a predetermined ratio, liquid guar gum, heavy oil thermal recovery water, 5% ion chelating agent solution, 5% crosslinking retarder solution and optional pressing The fracturing fluid additives are mixed to form a fracturing fluid base fluid; the fracturing fluid base fluid, cross-linking agent and gel breaker are mixed according to a predetermined ratio to obtain a guar gum fracturing fluid system.

[0034] In the guar gum fracturing fluid system provided by this application, under the action of heavy oil thermal recovery water and ion chelating agent, the liquid guar gum can be unifor...

Embodiment 1

[0037] A guar gum fracturing fluid system prepared by using heavy oil thermal recovery water provided in this example is composed of guar gum fracturing fluid base fluid prepared by using heavy oil thermal recovery water and a crosslinking agent, in parts by weight, Contains the following ingredients:

[0038] 0.8 part of liquid guar gum (hydroxypropyl guar gum), 0.01 part of ion chelating agent (aminotriacetic acid), 0.08 part of cross-linking retarder (sorbitol), 1 part of fracturing fluid auxiliary agent (50wt% long-chain quaternary ammonium Salt-type organic anti-swelling agent, 50wt% polytrisiloxane drainage aid), 0.03 parts of gel breaker (85wt% capsule gel breaker, 15wt% sodium persulfate), heavy oil thermal recovery water (70°C) 97.76 0.3 parts, 0.3 parts of organic shed crosslinking agent XJ-03 (produced by Karamay Xinju Industry and Trade Co., Ltd.), 0.02 parts of sodium hydroxide.

[0039] The preparation process of the above-mentioned guar gum fracturing fluid sys...

Embodiment 2

[0045] The difference with embodiment 1 is:

[0046] In parts by weight, it includes the following components: 1 part of liquid guar gum (hydroxypropyl guar gum), 0.015 part of ion chelating agent (aminotriacetic acid), 0.15 part of crosslinking retarder (sorbitol), fracturing fluid auxiliary 1.5 parts of agent (35wt% long-chain quaternary ammonium salt type organic anti-swelling agent, 35wt% polytrisiloxane drainage aid and 30wt% polyether demulsifier), 0.03 parts of gel breaker (90wt% capsule gel breaker , 10wt% sodium persulfate), 96.98 parts of heavy oil thermal recovery water (85°C), 0.3 parts of organic shed crosslinking agent XJ-03, and 0.02 parts of sodium hydroxide.

[0047] The cross-linking time of the guar gum fracturing fluid system prepared by using the heavy oil thermal recovery water formed by the formula in this example is 65s. -1 Under the condition of shearing for 60 minutes, the viscosity still remains above 180mpa·s.

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Abstract

The invention provides a guanidine gum fracturing fluid system prepared by using heavy oil thermal recovery water and a preparation method of the fracturing fluid system. The guanidine gum fracturingfluid system comprises liquid guanidine gum, an ion chelating agent, a crosslinking retarder, a gel breaker, a cross-linking agent and the balance of heavy oil thermal recovery water, wherein the temperature of the heavy oil thermal recovery water is 70-85 DEG C. Under the action of the heavy oil thermal recovery water and the ion chelating agent, the liquid guanidine gum can be uniformly dispersed and rapidly swelled in heavy oil hot water and reach 90% of sufficient swelling in a short time, and a fracturing base fluid can be crosslinked at a suitable speed under the action of the crosslinking agent and the crosslinking retarder. Compared with a current fracturing fluid, the fracturing fluid provided by the application has temperature-resistant ability of 95 DEG C, the viscosity of the fracturing fluid is always greater than 140 mPa*s when constant-temperature shear is performed at 60 DEG C and 170 S<-1> for 60 min, and therefore the fracturing performance of the fracturing fluid isgreatly improved.

Description

technical field [0001] The invention relates to the field of oil field exploitation, in particular to a guar gum fracturing fluid system prepared by using heavy oil thermal recovery water and a preparation method thereof. Background technique [0002] Hydraulic fracturing technology is the key technology for reservoir stimulation. The development mode of Mahu Conglomerate Oilfield in Xinjiang is mainly horizontal well + volume fracturing. Large-scale volume fracturing has a huge demand for water resources, and the shortage of water resources has become a key constraint factor for the development of Mahu Oilfield. Fengcheng heavy oil production is mainly based on steam huff and puff and steam-assisted gravity drainage technology, and the output of heavy oil thermal recovery water is 1000m 3 / d, a large amount of heavy oil thermal recovery water needs to be purified, which increases the production cost and environmental protection pressure. If guar gum fracturing fluid is fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C09K8/90
Inventor 翟怀建周培尧赵丽董景锋潘竟军怡宝安张敬春汪志臣邬国栋张风娟
Owner PETROCHINA CO LTD
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