US 11,808,751 B2
Method and system for detecting mass of oil in inorganic mineral of shale
Bo Liu, Daqing (CN); Shansi Tian, Daqing (CN); Xiaofei Fu, Daqing (CN); Fang Zeng, Daqing (CN); Zhiwei Hu, Daqing (CN); Liu Wang, Daqing (CN); and Ning Hou, Daqing (CN)
Assigned to Northeast Petroleum University, Daqing (CN)
Filed by Northeast Petroleum University, Daqing (CN)
Filed on Sep. 24, 2020, as Appl. No. 17/031,324.
Claims priority of application No. 202010856006.4 (CN), filed on Aug. 24, 2020.
Prior Publication US 2022/0057379 A1, Feb. 24, 2022
Int. Cl. G01N 33/24 (2006.01); G01N 1/40 (2006.01); G01N 5/04 (2006.01); G01N 23/20 (2018.01)
CPC G01N 33/241 (2013.01) [G01N 1/4055 (2013.01); G01N 5/04 (2013.01); G01N 23/20 (2013.01); G01N 2001/4061 (2013.01); G01N 2223/056 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for detecting a mass of oil in an inorganic mineral of shale, comprising:
obtaining a shale sample and determining a parameter of the shale sample;
wherein the parameter comprises a mineral composition ratio, a total organic carbon (TOC) content, a vitrinite reflectance (VR) and a porosity;
the mineral composition ratio is derived by performing whole-rock X-ray diffraction (XRD) on the shale sample; and
the mineral composition ratio comprises a quartz ratio, a clay mineral ratio and a carbonate mineral ratio;
dividing the shale sample into a first shale sample and a second shale sample, and performing an extraction test on the first shale sample by using chloroform to obtain a total content of shale oil in the shale;
enriching kerogen from the second shale sample to obtain dry kerogen, specifically comprising: enriching the kerogen in the second shale sample by using a sedimentary rock kerogen separation method;
oven-drying the dry kerogen to obtain oven-dried kerogen and determining the mass of the oven-dried kerogen, specifically comprising: drying the dry kerogen by using an oven at 110° C. for 6 h;
performing an extraction test on the oven-dried kerogen by using chloroform and determining a mass of extracted kerogen;
determining a difference between the mass of the oven-dried kerogen and the mass of the extracted kerogen as the mass of oil in an organic matter;
multiplying a ratio of the mass of the oil in the organic matter to the mass of the second shale sample by 100 to obtain the mass of the oil in the organic matter of the shale sample;
subtracting the mass of the oil in the organic matter of the shale sample from the total content of the shale oil in the shale to obtain the mass of the oil in the inorganic mineral of the shale;
fitting the ratio of the mass of the oil in the inorganic mineral of the shale to the mass of the oil in the organic matter of the shale sample and the parameter of the shale sample to establish a model for predicting the ratio of the mass of the oil in the inorganic mineral of the shale to the mass of the oil in the organic matter;
obtaining the mass of oil in an organic matter of shale to be detected; and
using the prediction model to determine the mass of the oil in an inorganic mineral of the shale to be detected according to the mass of the oil in the organic matter of the shale to be detected.