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Acid carboxymethyl guargum fracturing fluid and preparation method thereof

A technology of carboxymethyl guar gum and carboxymethyl guar gum powder, which is applied in the field of oil field fracturing, can solve the problems of formation permeation and filtration reduction, and achieve the effects of easy operation, simple preparation process, and good fluid loss reduction performance

Inactive Publication Date: 2012-03-28
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Divalent ions tend to form flocculent precipitates under alkaline conditions, thereby reducing formation permeation filtration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, this acidic carboxymethyl guar gum fracturing fluid is made up of following raw material mass percentage: carboxymethyl guar gum powder 0.3% to 0.8%, aid drainage agent 0.2% to 1%, antiswelling agent 0.5% to 3%, bactericide 0.01% to 0.1%, demulsifier 0.15% to 1%, acidic crosslinking agent 0.5% to 1.2%, crosslinking time delay agent 0.2% to 1.2%, gel breaker 0.04% to 5%, and the rest amount of water.

Embodiment 2

[0035] Example 2 differs from Example 1 in that: the acidic crosslinking agent in Example 2 is HTC acidic crosslinking agent, and the optimal dosage is 0.5% to 0.7%.

Embodiment 3

[0036] Embodiment 3 differs from Embodiments 1 to 2 in that the gel breaker in Embodiment 3 is sodium persulfate or potassium persulfate, and the optimal dosage is 0.1% to 4%.

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PUM

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Abstract

The invention relates to the technical field of the fracturing of an oil field, and particular relates to an acid carboxymethyl guargum fracturing fluid and a preparation method of the fluid. The acid carboxymethyl guargum fracturing fluid comprises the following raw materials: carboxymethyl guargum power, discharge aiding agent, swelling-resistant agent, bactericide, demulsifier, acid cross-linking agent, cross-linking time delay action activator, gel breaker and water. The preparation method of the fluid comprises the following steps of: firstly preparing base liquid; secondly preparing cross-linking; and thirdly preparing the acid carboxymethyl guargum fracturing fluid. The invention has the beneficial effects of acidic crosslinking environment, simple technology, convenience of in-field operation, and good combination property; and the acid carboxymethyl guargum fracturing fluid has the advantages of being good in compatibility performance, delayed in crosslinking characteristic, good in fluid loss characteristic, good in swelling-resistant effect, low in residue, and thorough in gel breaking, and can meet the fracturing construction of a reservoir stratum under the temperature from 30 DEG C to 100 DEG C.

Description

technical field [0001] The invention relates to the technical field of oil field fracturing, and relates to an acidic carboxymethyl guar gum fracturing fluid and a preparation method thereof, and is especially suitable for fracturing reconstruction of crude oil reservoirs with strong water sensitivity and tendency to return to gel. Background technique [0002] Hydraulic fracturing is one of the important stimulation measures for oil and gas well stimulation, water well injection, and oil and gas well productivity and recovery in low-permeability and ultra-low-permeability reservoirs. This technology utilizes ground high-pressure pump injection, and the liquid fracturing fluid is the working fluid in the process of hydraulic fracturing to transform oil and gas layers, which plays the role of transmitting pressure, forming formation fractures, and carrying proppant into the fractures. [0003] Water-based fracturing fluid has become the preferred fracturing fluid for our oilf...

Claims

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Application Information

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IPC IPC(8): C09K8/68
Inventor 李彦林刘炜张天翔韩飞鹏罗兆袁峰
Owner BC P INC CHINA NAT PETROLEUM CORP
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