Title:
METHOD FOR EVALUATING SURFACE HYDRATION INHIBITOR FOR DRILLING FLUID BASED ON LOW-FIELD NUCLEAR MAGNETIC RESONANCE
Document Type and Number:
WIPO Patent Application WO/2019/080438
Kind Code:
A1
Abstract:
A method for evaluating a surface hydration inhibitor for a drilling fluid by low-field nuclear magnetic resonance, comprising: adding a surface hydration inhibitor to fully hydrated clay, performing low-field nuclear magnetic resonance measurement on the clay treated by the surface hydration inhibitor to obtain a transverse relaxation time T2 spectrum, and calculating integral areas of three peaks in the T2 spectrum in three intervals of 0.001-0.01 ms, 1-10 ms, and 100-1000 ms, wherein the integral areas of the peaks in the T2 spectrum correspond to semaphores of water in a certain state; and calculating the mass of water in each state in the clay according to a conversion line of the semaphores of water and water mass, so as to quantitatively evaluate the inhibition effect of the surface hydration inhibitor for a drilling fluid on surface hydration of the clay. By means of the method, the inhibition effect of a surface hydration inhibitor for a drilling fluid on surface hydration of clay can be intuitively and quantitatively determined.
Inventors:
SU JUNLIN (CN)
HUANG JINJUN (CN)
LUO YAFEI (CN)
LUO PINGYA (CN)
DONG WENXIN (CN)
HUANG JINJUN (CN)
LUO YAFEI (CN)
LUO PINGYA (CN)
DONG WENXIN (CN)
Application Number:
PCT/CN2018/079166
Publication Date:
May 02, 2019
Filing Date:
March 15, 2018
Export Citation:
Assignee:
UNIV SOUTHWEST PETROLEUM (CN)
International Classes:
G01N24/08
Foreign References:
| CN103308543A | 2013-09-18 | |||
| CN101975789A | 2011-02-16 | |||
| CN102944571A | 2013-02-27 | |||
| CN104155338A | 2014-11-19 | |||
| CN106198595A | 2016-12-07 | |||
| US6630357B2 | 2003-10-07 |
Attorney, Agent or Firm:
BEIJING ZHCC INTELLECTUAL PROPERTY CO., LTD (CN)
Download PDF: