Results 21 to 30 of about 30,413 (251)

Migration Rule of Crude Oil in Microscopic Pore Throat of the Low-Permeability Conglomerate Reservoir in Mahu Sag, Junggar Basin

Energies, 2022
The low-permeability conglomerate reservoir in the Mahu Sag has great resource potential, but its strong heterogeneity and complex microscopic pore structure lead to a high oil-gas decline ratio and low recovery ratio.
Feng-Qi Tan, Chun-Miao Ma, Xu-Yang Zhang, Ji-Gang Zhang, Long Tan, Dan-Dan Zhao, Xian-Kun Li, Yu-Qian Jing   +7 more
doaj   +2 more sources

Experimental Study on the Oil Recovery Performance of CO2 Huff-and-Puff Process in Fractured Tight Oil Reservoirs

Geofluids, 2022
In order to investigate energy supply capacity and oil production contribution of near-fracture and fracture-free zone in fractured tight oil reservoirs, a series of CO2 huff-and-puff tests were designed and carried out in different experimental ...
Kun Qian, Yu Huang, Yanfeng He, Xiangji Dou, Xiaojun Wu   +4 more
doaj   +2 more sources

Analysis of the Distribution Pattern of Remaining Oil and Development Potential after Weak Gel Flooding in the Offshore LD Oilfield

Gels
The LD oilfield is one of the representative offshore oilfields. After weak gel flooding, the recovery rate is significantly improved. However, the oilfield is then in a medium- to high-water content stage, presenting a complex distribution of the ...
Lizhen Ge, Xiaoming Chen, Gang Wang, Guohao Zhang, Jinyi Li, Yang Liu, Lixiao Xiao, Yuchen Wen, Weifeng Yuan, Ming Qu, Mingxing Bai   +10 more
doaj   +2 more sources

Flow Unit Model of Channel Sand Body and Its Effect on Remnant Oil Distribution: A Case Study of PI Formation in the Eastern Transition Zone of Daqing Oilfield

Geofluids, 2020
To analyze the effect of various flow units in a channel sand body on remnant oil, we established a connection between various flow unit types and the remnant oil distribution.
Yue Zhang, You-liang Ji, Hui-jian Wen, Shi-zhong Ma, Dong-lai Bai, Bin-chi Zhang, Ben-kang Xing   +6 more
doaj   +2 more sources

Study on microscopic mechanism of deep heavy oil emulsification under synergistic CO2-thermal agent conditions [PDF]

Youqicang pingjia yu kaifa
Heavy oil accounts for about 70% of the world’s remaining proven crude oil reserves, yet its efficient development remains a significant challenge worldwide.
LIN Yutong, ZHANG Qi, LIU Chengguo, PENG Mingguo, LI Yujie, ZHAO Jing, LIU Run, LI Qiu, LIU Yali
doaj   +2 more sources

Differences of microscopic seepage mechanisms of water flooding and polymer flooding and prediction models of final oil recovery for conglomerate reservoir [PDF]

Oil & Gas Science and Technology, 2019
The special sedimentary environments of conglomerate reservoir lead to pore structure characteristics of complex modal, and the reservoir seepage system is mainly in the “sparse reticular-non reticular” flow pattern. As a result, the study on microscopic
Tan Fengqi, Xu Changfu, Zhang Yuliang, Luo Gang, Chen Yukun, Liu Wentao   +5 more
doaj   +3 more sources

A Microscopic Experimental Study on the Dominant Flow Channels of Water Flooding in Ultra-High Water Cut Reservoirs

Energies
The water drive reservoir in Shengli Oilfield has entered a stage of ultra-high water cut development, forming an advantageous flow channel for the water drive, resulting in the inefficient and ineffective circulation of injected water.
Chunlei Yu, Min Zhang, Wenbin Chen, Shiming Zhang, Shuoliang Wang   +4 more
doaj   +2 more sources

Study on Microscopic Distribution Characteristics of the Remaining Oil in Polymer-Flooded Reservoirs

ACS Omega, 2022
Polymer flooding is an effective enhanced oil recovery (EOR) technology used in Daqing Oilfield. Microscopic distribution of remaining oil in polymer-flooded reservoirs is more complicated in comparison with waterflooded reservoirs. In this paper, UV excitation, frozen section-laser confocal technology, and three-dimensional reconstruction technology ...
Xiaolin Ping, Guoqing Han, Zhenqiang Bai, Qinghua Wang, Long Peng   +4 more
openaire   +2 more sources

Simulation research on microscopic remaining oil distribution in high water cut oilfield

IOP Conference Series: Earth and Environmental Science, 2021
Abstract Most of the oilfields in China have entered the stage of high water cut nowadays, and it is very difficult to enhance oil recovery in these oilfields. In this paper, combined with the image processing technology, the visualization technology of 3D data field and the seepage mechanics theory, a simulation model on microscopic ...
Shaowei Pan, Zhaoyang Wang, Haining Luo
openaire   +1 more source

Pore-scale investigation on occurrence characteristics and conformance control mechanisms of emulsion in porous media

Petroleum Exploration and Development, 2021
Microscopic computed tomography (Micro-CT) is used to visualize microscopic flow in sandstone core samples during emulsion flooding. The images obtained during the experiment are processed quantitatively with a series of methods to evaluate the ...
Hang SU, Fujian ZHOU, Yang LIU, Yajun GAO, Baoyang CHENG, Rencheng DONG, Tianbo LIANG, Junjian LI   +7 more
doaj   +1 more source