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Pore Characteristics and Factors Controlling Lacustrine Shales from the Upper Cretaceous Qingshankou Formation of the Songliao Basin, Northeast China: A Study Combining SEM, Low-temperature Gas Adsorption and MICP Experiments
Hui HAN,
Jie DAI,
Chen GUO,
Ningning ZHONG,
Peng PANG,
Zhengang DING,
Jianping CHEN,
Zhenkai HUANG,
Yuan GAO,
Jinyu LUO,
Qirui LI,
Zhaokun ZHANG,
Corresponding Author
Hui HAN
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Key Laboratory of Sedimentary Basin and Oil and Gas Resources, Ministry of Natural Resources, Chengdu, 610081 China
State Key Laboratory of Petroleum Resource & Prospecting, China University of Petroleum, Beijing, 102249 China
Cooperative Innovation Center of Shale Gas Resources and Environments, Southwest Petroleum University, Chengdu, 610500 China
Corresponding author. E-mail: [email protected]; [email protected]Search for more papers by this authorCorresponding Author
Jie DAI
Chengdu Center, China Geological Survey, Chengdu, 610081 China
Key Laboratory of Sedimentary Basin and Oil and Gas Resources, Ministry of Natural Resources, Chengdu, 610081 China
Corresponding author. E-mail: [email protected]; [email protected]Search for more papers by this authorChen GUO
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorNingning ZHONG
State Key Laboratory of Petroleum Resource & Prospecting, China University of Petroleum, Beijing, 102249 China
Search for more papers by this authorPeng PANG
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorZhengang DING
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorJianping CHEN
Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083 China
Search for more papers by this authorZhenkai HUANG
Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083 China
Search for more papers by this authorYuan GAO
Beijing Center for Physical and Chemical Analysis, Beijing, 100089 China
Search for more papers by this authorJinyu LUO
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorQirui LI
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorZhaokun ZHANG
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorHui HAN,
Jie DAI,
Chen GUO,
Ningning ZHONG,
Peng PANG,
Zhengang DING,
Jianping CHEN,
Zhenkai HUANG,
Yuan GAO,
Jinyu LUO,
Qirui LI,
Zhaokun ZHANG,
Corresponding Author
Hui HAN
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Key Laboratory of Sedimentary Basin and Oil and Gas Resources, Ministry of Natural Resources, Chengdu, 610081 China
State Key Laboratory of Petroleum Resource & Prospecting, China University of Petroleum, Beijing, 102249 China
Cooperative Innovation Center of Shale Gas Resources and Environments, Southwest Petroleum University, Chengdu, 610500 China
Corresponding author. E-mail: [email protected]; [email protected]Search for more papers by this authorCorresponding Author
Jie DAI
Chengdu Center, China Geological Survey, Chengdu, 610081 China
Key Laboratory of Sedimentary Basin and Oil and Gas Resources, Ministry of Natural Resources, Chengdu, 610081 China
Corresponding author. E-mail: [email protected]; [email protected]Search for more papers by this authorChen GUO
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorNingning ZHONG
State Key Laboratory of Petroleum Resource & Prospecting, China University of Petroleum, Beijing, 102249 China
Search for more papers by this authorPeng PANG
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorZhengang DING
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorJianping CHEN
Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083 China
Search for more papers by this authorZhenkai HUANG
Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083 China
Search for more papers by this authorYuan GAO
Beijing Center for Physical and Chemical Analysis, Beijing, 100089 China
Search for more papers by this authorJinyu LUO
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorQirui LI
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorZhaokun ZHANG
School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 China
Search for more papers by this authorAbout the first and corresponding author:
Han Hui, male; born in 1986 in Kaifeng City, Henan Province; doctor; graduated from the China University of Petroleum at Beijing; Associate Professor of the School of Geoscience and Technology, Southwest Petroleum University. His interests include shale gas and petroleum geochemistry. E-mail: [email protected]; phone: +86 18302815786.
Abstract
To investigate pore characteristics and the factors controlling lacustrine shales, geochemical, mineralogical and petrophysical experiments were performed on 23 shale samples from the Qingshankou Formation of the Songliao Basin, China. A comparison of mercury injection capillary pressure (MICP) and low-temperature N2 adsorption pore-size distribution showed that MICP has a higher pore-size distribution (PSD) line in its overlapping pore diameter range, which may be elevated by the higher pressure of MICP. Therefore, in the overlapping range, low-temperature N2 adsorption data were preferred in pore characterization. Negative correlations were observed between pore volumes and TOC content, indicating organic matter pores are not well-developed in the studied samples. This may be related to their low grade of maturity and type I kerogens. There existed negative relationships between pore volumes and S1, which illustrated that liquid hydrocarbons occupied some pore space. Micropore volume had a better correlation with S1 than mesopore and macropore volumes, which suggests that liquid hydrocarbons preferentially occur in micropores. No obvious relationships between pore volumes and quartz or feldspar were observed, while pore volumes increased with the increasing clay mineral content. These relationships indicate that intraparticle pores in clay minerals represent the principal pore type.
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