Title:
ISOTOPE NUCLEAR MAGNETIC METHOD FOR ANALYZING INEFFECTIVE WATER ABSORPTION OF ROCK PORE
Document Type and Number:
WIPO Patent Application WO/2019/233000
Kind Code:
A1
Abstract:
An isotope nuclear magnetic method for analyzing ineffective water absorption of a rock pore, comprising: saturating a rock core pore of a rock core sample by means of wetted phase fluid ordinary water H2O to obtain a rock core T2 spectrum after saturation by the ordinary water; re-saturating the rock core pore by means of wetted phase fluid heavy water D2O to obtain a rock T2 spectrum as a baseline; injecting fluorinated oil into the rock core sample saturated by the heavy water; injecting the ordinary water H2O, simulating a water injection process, then injecting the fluorinated oil, analyzing the content of immovable water, and obtaining a residual T2 spectrum; performing differencing on the residual T2 spectrum and the rock baseline T2 spectrum to obtain a range, namely an ineffective pore water absorption part, and obtaining the pore size distribution of the pore having ineffective water absorption. By using different nuclear magnetic response signals of the ordinary water and the heavy water, and displacement, isotope labeling, and nuclear magnetic T2 spectrum analysis are combined to determine a source of the rock immovable water and the amount of ineffective water injection, thereby effectively reducing the influence of protium element in the sample.
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Inventors:
TANG MINGMING (CN)
LU SHUANGFANG (CN)
MA HUIFANG (CN)
WANG MIN (CN)
LI JIJUN (CN)
TAN HONGKUN (CN)
CHU CHANGHONG (CN)
LU SHUANGFANG (CN)
MA HUIFANG (CN)
WANG MIN (CN)
LI JIJUN (CN)
TAN HONGKUN (CN)
CHU CHANGHONG (CN)
Application Number:
PCT/CN2018/109269
Publication Date:
December 12, 2019
Filing Date:
October 08, 2018
Export Citation:
Assignee:
UNIV CHINA PETROLEUM EAST CHINA (CN)
International Classes:
G01N15/08; G01N24/08
Foreign References:
| CN106442600A | 2017-02-22 | |||
| CN101004134A | 2007-07-25 | |||
| CN104697915A | 2015-06-10 | |||
| CN105223116A | 2016-01-06 | |||
| US20050206378A1 | 2005-09-22 |
Other References:
GAO, HUI ET AL.: "Characteristics of Nuclear Magnetic Resonance Waterflood Oil in Ultra-low Permeability Sandstone and Influencing Factors thereof for a Case of Yanchang Formation in Ordos Basin", GEOLOGICAL JOURNAL OF CHINA UNIVERSITIES, vol. 19, no. 2, 30 June 2013 (2013-06-30), pages 364 - 372
ZHANG, PENGYI: "Evaluation of Reservoir Physical Properties, Oil Storage Capacity and Seepage Capacity By NMR Data", TUHA OIL AND GAS, vol. 7, no. 3, 30 September 2002 (2002-09-30), pages 257 - 260
ZHANG, PENGYI: "Evaluation of Reservoir Physical Properties, Oil Storage Capacity and Seepage Capacity By NMR Data", TUHA OIL AND GAS, vol. 7, no. 3, 30 September 2002 (2002-09-30), pages 257 - 260
Attorney, Agent or Firm:
CHENGDU FANGYU UNION PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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