Pore characterization of marine-continental transitional shale in Permian Shanxi Formation of The Southern North China Basin

被引:9
作者
Yang, Xiaoguang [1 ,2 ]
Guo, Shaobin [1 ,2 ]
机构
[1] China Univ Geosci Beijing, Sch Energy Resources, Beijing 100083, Peoples R China
[2] Key Lab Marine Reservoir Evolut & Hydrocarbon Enr, Minist Educ, Beijing, Peoples R China
关键词
Marine-continental transitional shale; pore characterization; gas adsorption; North China; MISSISSIPPIAN BARNETT SHALE; SURFACE-AREA; ORDOS BASIN; GEOCHEMICAL CHARACTERISTICS; GAS-ADSORPTION; EVOLUTION; COAL; SYSTEMS; STORAGE; STRATA;
D O I
10.1177/0144598720912346
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Organic-rich marine-continental transitional shale is widely developed in the Permian Shanxi Formation in the Southern North China Basin. In this study, shale samples from the southern and northern wells of the basin were characterized by X-ray diffraction, high-pressure mercury intrusion porosimetry, low-pressure gas adsorption (N-2 and CO2) and argon ion polishing-field emissions scanning electron microscopy. The pore types and structures of shale micropores, mesopores and macropores are qualitatively described; their pore size distribution and volume are quantitatively characterized; and the influencing factors of the pore volume are analyzed. The results show that the marine-continental transitional shale pores exhibit an unbalanced multimodal distribution with four peaks at 0.4-0.8 nm, 2-4 nm, 10-50 nm, and >10 mu m. The mesopore volume is dominant, accounting for 40-70% of pores. The mesopores of the samples are slit-shaped pores and ink bottle-shaped pores. Since there is a desorption hysteresis loop on the N-2 adsorption-desorption curve, most of them belong to the H-4 type, and ye23-8 belongs to the mixed H-2 and H-4 type according to the IUPAC classification scheme. The slit-shaped pores are mainly interlayer pores and interparticle pores in clays, and the ink bottle-shaped pores are tiny dissolved pores and organic matter pores. Ro has negative correlation with the volumes of the mesopores and macropores, but it does not affect the volume of micropores. TOC has a positive correlation with the macropore and micropore volumes, and it has a negative correlation with mesopore volume. The relative contents of kaolinite and I/S have a positive correlation with the mesopore and macropore volumes. The relative content of illite has a negative correlation with the mesopore and macropore volumes. The relative content of chlorite has a negative correlation with the mesopore volume.
引用
收藏
页码:2199 / 2216
页数:18
相关论文
共 52 条
  • [51] Hydrocarbon generation from confined pyrolysis of lower Permian Shanxi Formation coal and coal measure mudstone in the Shenfu area, northeastern Ordos Basin, China
    Zhao, Zhengfu
    Pang, Xiongqi
    Jiang, Fujie
    Wang, Ke
    Li, Longlong
    Zhang, Kun
    Zheng, Xiaowei
    [J]. MARINE AND PETROLEUM GEOLOGY, 2018, 97 : 355 - 369
  • [52] [邹才能 Zou Caineng], 2010, [石油勘探与开发, Petroleum Exploration and Development], V37, P641, DOI 10.1016/S1876-3804(11)60001-3