Research Status, Existing Problems, and the Prospect of New Methods of Determining the Lower Limit of the Physical Properties of Tight Sandstone Reservoirs
Author:
Wang Weiming1ORCID, Liu Qingguo1, Liu Yingnan1, Zhang Rigong2, Cheng Tian2, Yan Youguo3, Hu Qianze2, Li Tingting1
Affiliation:
1. School of Geoscience, China University of Petroleum (East China), Qingdao 266580, China 2. Exploration and Development Research Institute, PetroChina Tuha Oilfield Company, Hami 839000, China 3. School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
Abstract
At present, many methods are used to determine the lower limits of physical properties (PPLLs) of tight sandstone reservoirs, such as empirical statistics, oil occurrence, and logging parameter crossplots, but the accuracy with which these methods obtain the lower limit of physical properties depends entirely on the number of test production data, and they are not suitable for tight sandstone reservoirs with a low degree of exploration and a lack of prediction. Compared to these mature methods, it can be concluded that the water-film-thickness-based method, which integrates factors such as formation temperature, formation pressure, mineral wettability, and formation water salinity, can characterize PPLLs using the minimum pore throat radius for hydrocarbon migration, which has a better theoretical basis and technical advantages. However, the water-film thickness is not a fixed value and cannot be directly measured in the laboratory. The molecular simulation method, known as a computational microscope, has become an effective means of investigating nano effects. By accurately investigating the interactions between rock minerals and the formation of water on atomic and molecular scales based on increasingly improved studies of the molecular force field, this method can overcome the deficiencies of the laboratory study of water films and precisely characterize the water films’ thickness. The intersection of molecular simulation and geology can bring about new methods and new research ideas for determining the lower limit of the physical properties of tight sandstone reservoirs and has broad application prospects.
Funder
general program of the National Natural Science Foundation of China general program of Shandong Natural Science Foundation forward-looking major science and technology program of the 14th five-year plan of PetroChina
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference80 articles.
1. Unconventional oil and gas resources and exploration and development prospects in China;Jia;Pet. Explor. Dev.,2012 2. Types, characteristics, mechanisms and prospects of conventional and unconventional hydrocarbon accumulation: A case study of tight oil and tight gas in China;Zou;Acta Pet. Sin.,2012 3. Evaluation of the EOR potential of the Fuyu tight oil reservoir in Aonan area of Daqing Oilfield;Tang;Fault-Block Oil Gas Field,2021 4. Two new methods for determining the lower limit of effective reservoir physical property and their application: A case study of deep clastic reservoir of Paleogene in Dongying Sag;Shao;J. Oil Gas Technol.,2008 5. Zhou, T., Yuan, H., Xu, F., and Wu, R. (2023). Tight Sandstone Reservoir Characteristics and Controlling Factors: Outcrops of the Shanxi Formation, Liujiang River Basin, North China. Energies, 16.
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