TY  - JOUR
AU  - Zhang, Ke
AU  - Gao, Yanfeng
AU  - Chen, Siqi
AU  - Tan, Zhiwei
AU  - Wu, Xiaopeng
AU  - Wang, Wentao
AU  - Tian, Yuxin
AU  - Su, Yong
AU  - Liu, Shichao
AU  - Wang, Haiyong
PY  - 2026
DA  - 2026/07/20
TI  - Determination of Reserve Parameters of Gulong Shale Oil Reservoir and Its Geological Significance
JO  - Reservoir Science
T2  - Reservoir Science
JF  - Reservoir Science
VL  - 2
IS  - 4
SP  - 276
EP  - 288
DO  - 10.62762/RS.2026.864544
UR  - https://www.icck.org/article/abs/RS.2026.864544
KW  - Gulong shale oil
KW  - total porosity
KW  - fluid addition method
KW  - reserve parameters
KW  - continental shale reservoir
AB  - The pore structure of continental shale reservoirs is complex and diverse, exhibiting multi-scale pore size distributions spanning from nanometers to micrometers. In particular, accurate porosity measurement has remained a major challenge in shale reservoir characterization. To achieve accurate porosity determination for continental shale, this study takes the Gulong shale as a case example. Based on the fluid occupancy characteristics of shale pores, the pore space is classified into three types: gas-occupied, water-occupied, and oil-occupied pores. The volumes of these three pore types are measured experimentally via kerosene saturation, ethanol extraction, and solvent washing, respectively, thereby establishing a method for measuring the total porosity of continental shale reservoirs---termed the fluid summation method. The results demonstrate that the micro- to nano-scale pores of Gulong shale exhibit strong imbibition of kerosene, enabling kerosene to serve as an effective saturating fluid for characterizing the gas-occupied pore volume; the free water and clay-bound water in shale can be fully extracted by soaking the crushed sample (particle size: 2--5~mm) in absolute ethanol; and dichloromethane, characterized by strong polarity and a low boiling point, proves to be an effective oil-washing reagent. Validation confirms that the fluid summation method yields accurate porosity measurements for fresh cores of Gulong shale. The successful application of this method provides a reliable basis for the accurate determination of reserve parameters of continental shale oil and gas reservoirs in China, as well as for understanding pore evolution mechanisms and optimizing the identification of sweet spots and sweet intervals.
SN  - 3070-2356
PB  - Institute of Central Computation and Knowledge
LA  - English
ER  - 

@article{Zhang2026Determinat,
  author = {Ke Zhang and Yanfeng Gao and Siqi Chen and Zhiwei Tan and Xiaopeng Wu and Wentao Wang and Yuxin Tian and Yong Su and Shichao Liu and Haiyong Wang},
  title = {Determination of Reserve Parameters of Gulong Shale Oil Reservoir and Its Geological Significance},
  journal = {Reservoir Science},
  year = {2026},
  volume = {2},
  number = {4},
  pages = {276-288},
  doi = {10.62762/RS.2026.864544},
  url = {https://www.icck.org/article/abs/RS.2026.864544},
  abstract = {The pore structure of continental shale reservoirs is complex and diverse, exhibiting multi-scale pore size distributions spanning from nanometers to micrometers. In particular, accurate porosity measurement has remained a major challenge in shale reservoir characterization. To achieve accurate porosity determination for continental shale, this study takes the Gulong shale as a case example. Based on the fluid occupancy characteristics of shale pores, the pore space is classified into three types: gas-occupied, water-occupied, and oil-occupied pores. The volumes of these three pore types are measured experimentally via kerosene saturation, ethanol extraction, and solvent washing, respectively, thereby establishing a method for measuring the total porosity of continental shale reservoirs---termed the fluid summation method. The results demonstrate that the micro- to nano-scale pores of Gulong shale exhibit strong imbibition of kerosene, enabling kerosene to serve as an effective saturating fluid for characterizing the gas-occupied pore volume; the free water and clay-bound water in shale can be fully extracted by soaking the crushed sample (particle size: 2--5~mm) in absolute ethanol; and dichloromethane, characterized by strong polarity and a low boiling point, proves to be an effective oil-washing reagent. Validation confirms that the fluid summation method yields accurate porosity measurements for fresh cores of Gulong shale. The successful application of this method provides a reliable basis for the accurate determination of reserve parameters of continental shale oil and gas reservoirs in China, as well as for understanding pore evolution mechanisms and optimizing the identification of sweet spots and sweet intervals.},
  keywords = {Gulong shale oil, total porosity, fluid addition method, reserve parameters, continental shale reservoir},
  issn = {3070-2356},
  publisher = {Institute of Central Computation and Knowledge}
}