Results 41 to 50 of about 437,988 (139)

Cross-flow area recognition in fractured oil reservoirs and foam flow characteristics

Journal of Petroleum Exploration and Production Technology
Fracture-cavity reservoirs are prone to frequent channeling pathways during foam flooding due to their complex fracture networks, which severely restricts the enhancement of oil recovery and CO₂ storage efficiency.
Na Zhang, Meng Li, Yangwen Zhu, Haiying Liao, Yunfei Xu, Tongtong Zhang, Longyu Jiang, Xinyuan He, Shi Chen, Kaiyi Zhao   +9 more
doaj   +1 more source

Feature extraction and pattern recognition of gas pipeline flow noise signals in a strong noisy background [PDF]

PeerJ Computer Science
The purpose of this study is to put forward a feature extraction and pattern recognition method for the flow noise signal of natural gas pipelines in view of the complex situation brought by the rapid development and expansion of urban natural gas ...
Enbin Liu, Chang Lu, Zhaorong Wen, Tianshu Hao, Xudong Lu, Lidong Wang   +5 more
doaj   +2 more sources

Study on the determination method of excitation load in electrical signal simulation for piezoelectric ultrasonic internal inspection of pipelines

Scientific Reports
Accurately determining the initial acoustic field excitation load of a piezoelectric ultrasonic probe is essential for simulating electrical signals and calculating wall thickness during ultrasonic internal inspection of pipelines.
Guangli Xu, Jianwen Liu, Qiang Wen, Yuejun Zheng, Liangxue Cai   +4 more
doaj   +1 more source

An Innovative High-Strength Double-Network Hydrogel for Use as a Drilling Fluid Plugging Agent

Gels
The problem of wellbore leakage is a key challenge in the petroleum industry, limiting drilling progress and increasing drilling costs. Plugging agents play a role in repairing leaks and fractures; however, traditional plugging materials generally have ...
Yanfeng He, Jing Guo, Jinmei Bai, Le Hua, Yisong Zhang, Zhiqiang Huang, Letian Pan, Zhan Hong   +7 more
doaj   +1 more source

Experimental study of surfactant flooding system in low permeability reservoir

Scientific Reports
In view of reservoirs with low pressure, medium porosity, and low permeability in Changqing Oilfield, along with the “double high stage” in the middle and late development featuring a sharp rise in water cut and a low comprehensive water flooding ...
Bai Jinmei, Qian Kun, Dou Xiangji, He Yanfeng   +3 more
doaj   +1 more source

Pressure Transient Analysis for Vertical Well Drilled in Filled-Cave in Fractured Reservoirs

Fluids
For capturing dynamic information about a filled-cave in the fractured reservoir, a novel Pressure Transient Analysis (PTA) analytical model for a well located at the filled-cave is established.
Wenyang Shi, Gerui Wang, Shaokai Rong, Jiazheng Qin, Juan Chen, Lei Tao, Jiajia Bai, Zhengxiao Xu, Qingjie Zhu   +8 more
doaj   +1 more source

Helium in Natural Gas [PDF]

Science, 1906
H P, Cady, D F, McFarland
openaire   +3 more sources

Diagenetic sequence stratigraphy of the Carboniferous Donghe Sandstone in the Tazhong area

Open Geosciences
A diagenetic sequence stratigraphic study was conducted on the Carboniferous Donghe Sandstone Member in the Tazhong Area. Based on data from drilling, well logging, and seismic profiles, the Donghe Sandstone Member was subdivided into one third-order ...
Cui Jindong, Xu Hui, Zhang Shengda, Sun Zetao, Tao Zhuwei, Zhou Tian   +5 more
doaj   +1 more source

Experimental Study on the Impact of Phase-Change Self-Propping Fracturing Fluid on Reservoir Invasion Damage

Applied Sciences
Hydraulic fracturing is crucial for the effective development of unconventional oil and gas reservoirs. This paper systematically reviews the damage issues caused by conventional fracturing fluids in tight unconventional reservoirs, highlighting problems
Yuxin Pei, Anze Tang, Junjie Zhu, Lei Zhang, Xikun Shan, Wendi Tang, Fuquan Song   +6 more
doaj   +1 more source

Study on failure mechanism of rubber sealing rings for high pressure equipment in ultra high H2S gas fields

Scientific Reports
In this study, the failure mechanisms of fluoroether rubber (FM) and hydrogenated nitrile butadiene rubber (HNBR) seal rings employed in two feedstock gas coalescers operating within an ultra-high H2S gas field were investigated.
Yang Zhong, Shibo Zhang, Ting Mao, Yongzhao Fan, Xi Yuan, Jian Yang   +5 more
doaj   +1 more source