PARAMETERIZATION OF NUCLEAR MAGNETIC RESONANCE TRANSVERSE RELAXATION TIME DISTRIBUTION

Title:

PARAMETERIZATION OF NUCLEAR MAGNETIC RESONANCE TRANSVERSE RELAXATION TIME DISTRIBUTION

Document Type and Number:

WIPO Patent Application WO/2023/184214

Kind Code:

A1

Abstract:

A system and method for performing a reservoir evaluation are disclosed. The method includes obtaining a nuclear magnetic resonance (NMR) dataset for a plurality of samples and obtaining a NMR log for a wellbore (104) penetrating a reservoir. The method further includes determining a rock facies description for each sample, determining a NMR transverse relaxation time (NMR T 2) distribution(306,602) from the NMR dataset, and determining a set of parameters (402v, 402r, 402d, 402a, 402o) characterizing the NMR T 2 distribution (306,602) based on one or more predetermined parameters. The method still further includes identifying a plurality of NMR facies (610,810,810a-810d) based, at least in part, on the set of parameters (402v, 402r, 402d, 402a, 402o) for each sample, determining a transformation that maps a subset of rock facies to a subset of the plurality of NMR facies (610,810,810a-810d), and performing the reservoir evaluation based, at least in part, on applying the transformation to the NMR log.

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Inventors:

WANG WEIHUA (SA)
CUI YUFENG (CN)
ALGHERYAFI HASAN (SA)

Application Number:

PCT/CN2022/083991

Publication Date:

October 05, 2023

Filing Date:

March 30, 2022

Export Citation:

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Assignee:

SAUDI ARABIAN OIL CO (SA)
ARAMCO FAR EAST BEIJING BUSINESS SERVICES CO LTD (CN)

International Classes:

G01V3/32

Foreign References:

CN109030311A	2018-12-18
CN104819923A	2015-08-05
CN113622901A	2021-11-09
US20140320126A1	2014-10-30
CN108291979A	2018-07-17
CN104932027A	2015-09-23

Other References:

HE XU: "Nuclear Magnetic Resonance Logging T2 Spectrum Sensitive Parameter Extraction and Application Study-Take Ordos Basin Dense Sandstone as example", CHINESE MASTER'S THESES FULL-TEXT DATABASE BASIC SCIENCES, no. 02, 15 February 2021 (2021-02-15), ISSN: 1674-0246

Attorney, Agent or Firm:

BEIJING ZHIXIA LAW FIRM (CN)

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