The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 2021
Filed:
Oct. 11, 2018
Petrochina Company Limited, Beijing, CN;
Hua Tian, Beijing, CN;
Shuichang Zhang, Beijing, CN;
Shaobo Liu, Beijing, CN;
Caineng Zou, Beijing, CN;
Keyu Liu, Beijing, CN;
Xuesong Lu, Beijing, CN;
Mengjun Zhao, Beijing, CN;
Lin Jiang, Beijing, CN;
Xingzhi Ma, Beijing, CN;
Bin Zhang, Beijing, CN;
Junjia Fan, Beijing, CN;
Peiqiang Yang, Beijing, CN;
PetroChina Company Limited, Beijing, CN;
Abstract
A method and an apparatus for measuring oil content of a tight reservoir based on nuclear magnetic resonance includes applying a pulse sequence to a tight reservoir rock, and after applying a first pulse and a last pulse in the pulse sequence, applying a gradient magnetic field to the tight reservoir rock, respectively, directions of the two applied gradient magnetic fields being opposite to each other, wherein the pulse sequence is composed of three 90° pulses; acquiring a nuclear magnetic resonance signal of the tight reservoir rock; and determining oil content of the tight reservoir rock according to an intensity of the nuclear magnetic resonance signal. The method can accurately distinguish an oil phase nuclear magnetic resonance signal and a water phase nuclear magnetic resonance signal in nanopores of tight reservoir rock, thereby effectively improving the accuracy of the detection result of the oil content of the tight reservoir rock.