公开(公告)号：US10884155B2

公开(公告)日：2021-01-05

申请号：US16157480

申请日：2018-10-11

Applicant: PetroChina Company Limited

Inventor： Hua Tian ,  Shuichang Zhang ,  Shaobo Liu ,  Caineng Zou ,  Keyu Liu ,  Xuesong Lu ,  Mengjun Zhao ,  Lin Jiang ,  Xingzhi Ma ,  Bin Zhang ,  Junjia Fan ,  Peiqiang Yang

IPC: G01N24/08 ,  G01R33/483 ,  G01R33/44 ,  G01R33/54 ,  G01R33/561 ,  G01R33/31 ,  G01R33/48 ,  G01R33/563 ,  G01V3/32

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.

公开(公告)号：US10184904B1

公开(公告)日：2019-01-22

申请号：US15961231

申请日：2018-04-24

Applicant: PetroChina Company Limited

Inventor： Yanjie Gong ,  Mengjun Zhao ,  Qingong Zhuo ,  Xuesong Lu ,  Lin Jiang

IPC: G01N23/20 ,  G01N23/20025 ,  G01N15/08 ,  G01N23/046 ,  G01N33/24

Abstract: The present disclosure discloses a core holder for a micron CT observation and an experimental method thereof. The core holder for a micron CT observation comprises: a carbon fiber pipe and a base; the base comprises a fluid injection channel therein; the carbon fiber pipe is provided with a core mounting cavity and a carbon fiber plunger therein; the carbon fiber pipe is a tubular structure with one end closed and the other end open; the carbon fiber plunger can fix the core between the closed end of the carbon fiber pipe and the carbon fiber plunger; the other end of the carbon fiber pipe is in a detachable sealed connection with an outlet of the fluid injection channel of the base. The core holder for a micron CT observation reduces the distance between the core and the micron CT radiation source, and improves the resolution.