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Method for testing influence of hydrochloric acid concentration on gelled acid viscosity

A technology of hydrochloric acid concentration and determination method, which is applied to measurement devices, flow characteristics, instruments, etc., can solve problems such as taking a long time to dissolve, and achieve the effects of high measurement result accuracy, reduced measurement cost, and simple measurement steps.

Inactive Publication Date: 2013-03-27
刘高昌
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  • Abstract
  • Description
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Problems solved by technology

This agent has been applied on-site in the development of buried-hill reservoirs in Dagang Oilfield. Since it is a powdery polymer product, it takes a long time to dissolve when preparing on-site

Method used

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  • Method for testing influence of hydrochloric acid concentration on gelled acid viscosity
  • Method for testing influence of hydrochloric acid concentration on gelled acid viscosity
  • Method for testing influence of hydrochloric acid concentration on gelled acid viscosity

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Embodiment

[0031] The invention relates to a method for measuring the influence of hydrochloric acid concentration on the viscosity of thickened acid, comprising the following steps:

[0032] (a) prepare hydrochloric acid of different concentrations respectively;

[0033] (b) repreparing a certain concentration of thickened acid;

[0034] (c) Then use a viscometer at a shear rate of 170s -1 Measure the apparent viscosity of each thickening acid at room temperature, 60, and 90°C under the same conditions;

[0035] (c) Arranging the obtained results to obtain the relationship between the concentration of the acid thickener and the apparent viscosity of the acid.

[0036] In the step (a), the concentration of hydrochloric acid is respectively 5%, 10%, 15%, 20%, 25%, and 30%.

[0037] In the step (b), the concentration of the thickening acid is 2.5%.

[0038] In the step (c), the viscometer is a six-speed rotational viscometer.

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Abstract

The invention discloses a method for testing influence of a hydrochloric acid concentration on a gelled acid viscosity, which comprises the steps of (a) respectively preparing hydrochloric acid differing in concentration; (b) preparing gelled liquid with a certain concentration; (c) testing parent viscosities of various gelled acid at room temperature, 60 DEG C and 90 DEG C with a viscosity meter at a shearing speed of 170s-1; and (c) sorting out the obtained results to obtain a relation between the acid liquid gelling agent concentration and the acid liquid apparent viscosity. The method for testing the influence of the hydrochloric acid concentration on the gelled acid viscosity can rapidly test the influence of the hydrochloric acid concentration on the gelled acid viscosity, and is high in precision of testing result, simple in testing step and greatly reduced in testing cost.

Description

technical field [0001] The invention relates to a method for measuring the influence of hydrochloric acid concentration on the viscosity of thickened acid. Background technique [0002] Acidizing technology has become an important technical measure and development means for reservoir engineers at home and abroad to relieve the clogging of oil and water wells near the wellbore, expand or extend oil and gas flow channels, improve formation permeability, increase production and injection, especially for some carbonate reservoirs It is more important for the efficient exploitation and development of some sandstone reservoirs. As a slow acid, thickened acid is used more and more, and this development trend will accelerate in the future. Thickening acid is mainly used in acid fracturing treatment. [0003] Because the thickener increases the viscosity of the acid liquid, reduces the squeezeability of the acid, and often prolongs the construction time needlessly, so the thickener...

Claims

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Application Information

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IPC IPC(8): G01N11/10
Inventor 刘高昌
Owner 刘高昌
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