公开(公告)号：US20190113649A1

公开(公告)日：2019-04-18

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: G01V3/32 ,  G01N24/08 ,  G01R33/561 ,  G01R33/44 ,  G01R33/54 ,  G01R33/483

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：US20190170644A1

公开(公告)日：2019-06-06

申请号：US16170914

申请日：2018-10-25

Applicant: PetroChina Company Limited

Inventor： Keyu LIU ,  Hua TIAN ,  Caineng ZOU ,  Shuichang ZHANG ,  Shaobo LIU ,  Mengjun ZHAO ,  Xuesong LU ,  Junjia FAN ,  Xiuli LI ,  Lili GUI ,  Qingong ZHUO ,  Xingzhi MA ,  Yanjie GONG ,  Zhichao YU ,  Qingyang MENG

IPC: G01N21/64 ,  G01N33/28

Abstract: A device and method of determining thermal maturity of oil source rocks by total scanning fluorescence including testing the organic solution of the extract from a series of oil source rock samples collected at different depths by total scanning fluorescence; building a model for interpretation of the oil source rock maturity according to the variation with depth of the TSF Intensity parameter and the TSF R1 parameter obtained by total scanning fluorescence, and identifying the stage of initial oil generation, the stage of major oil generation and the stage of major gas generation; and establishing the relationship between the TSF Intensity parameter and/or the TSF R1 parameter with the existing characteristic parameters that quantitatively characterize the maturity of oil source rocks, thereby accomplishing the analysis and determination of the maturity of the oil source rocks.