Evaluation of enhanced oil recovery methods for mature continental heavy oil fields in China based on geology, technology and sustainability criteria

Yao, Yue; Sun, Dalin; Xu, Jin-Hua; Wang, Bin; Peng, GuoHong; Sun, Bo

doi:10.1016/j.energy.2023.127962

Cited by 7 publications

(2 citation statements)

References 62 publications

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“…Excess water production is a problem that needs to be addressed in most existing mature oil fields. , To solve the problem, many solutions are proposed, and the injection of water-plugging agents is proven to be an effective strategy to reduce water production. − Among the many water-plugging agents, polyacrylamide (PAAm) hydrogels are one of the most cost-effective and technically mature . However, the poor mechanical properties and heat resistance of PAAm hydrogels cannot fulfill the performance requirements for long-term blocking in harsh environments, which mainly result from the inhomogeneity and poor heat resistance of hydrogel networks .…”

Section: Introductionmentioning

confidence: 99%

Tough, Notch-Insensitive, Heat-Resistant Hydrogels Constructed by Vinylated Polylysine for Temporary Oilfield Water Plugging

Xu,

Wu,

Yuan

et al. 2023

Ind. Eng. Chem. Res.

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Polyacrylamide hydrogels make up a category of widely used oilfield water-plugging agents. However, their poor mechanical properties and insufficient heat resistance severely limit their applications. In this work, a novel strategy for the construction of tough and heat-resistant polyacrylamide hydrogels using vinylated modified polylysine (PLL) as a multifunctional cross-linker (named APLL) is proposed. The multifunctionality of APLL leads to a three-dimensional network of hydrogels containing a uniform network structure that distributes stress and a dynamic cross-linked structure that dissipates energy. Meanwhile, APLL retains the thermal stabilization properties of PLL, and its use as a cross-linking site in the polymer network can effectively improve the heat resistance of hydrogels. As a result, hydrogels exhibit ultrastretchability to 3295%, excellent notch-insensitivity (75% prefabricated notched samples still have a fracture energy of 15,728 J/m2), and good heat resistance (better aging performance than N, N-methylene bis-acrylamide cross-linked hydrogels at 130 °C). In addition, the saline suspension composed of preformed gel particles of APLL cross-linked hydrogels can age at 80 °C for more than 10 days and effectively seal the pores with a sealing rate of 95% in percolation experiments. Such mechanical properties, notch insensitivity, and heat resistance enable the APLL cross-linked hydrogels to serve as a potential temporary water-plugging agent for heterogeneous reservoirs of the oilfield.

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Section: Introductionmentioning

confidence: 99%

Tough, Notch-Insensitive, Heat-Resistant Hydrogels Constructed by Vinylated Polylysine for Temporary Oilfield Water Plugging

Xu,

Wu,

Yuan

et al. 2023

Ind. Eng. Chem. Res.

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“…Such a state of development of agricultural biogas plants is caused by many factors whose impact and mutual relations have not been the subject of previous research. The method of pairwise comparison of multiple factors has so far been used for investment decision-making [27][28][29][30][31][32][33][34][35][36][37][38][39][40]. This study aims to fill this research gap by analyzing the current state and by using the pairwise comparison method to support the decision-making process on the location of agricultural biogas plants [41][42][43][44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Identification of Key Factors for the Development of Agricultural Biogas Plants in Poland

Ginda,

Szyba

2023

Energies

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Agricultural biogas plants are a renewable source of energy and at the same time enable the disposal of biodegradable waste generated in agriculture and the food industry. In Poland, a program aimed at constructing agricultural biogas plants has been in operation since 2010 with the goal of producing 1.7 billion Nm3 of biogas, which has not been achieved. Factors that could influence the development of this energy source were identified based on a register of agricultural biogas producers from the National Agriculture Support Center and data from the Energy Regulatory Office. These factors are technology, substrates, state energy policy, profitability, population density in the commune and the spatial arrangement of the commune resulting from spatial development plans. A pairwise comparison analysis using the DEMATEL method was conducted for these factors. It allowed us to conclude that they are population density and the lack of local spatial development plans in most rural areas. The situation may be improved by the obligation to develop such plans for the entire area of each commune and by locating biogas plants near livestock farms and agri-food processing plants. The selected DEMATEL method is mature and comprehensively verified. It enables research to be carried out in other contexts, taking into account the correlations between factors. It is a universal method, and after collecting expert opinions, research can be expanded. The obtained results of the analysis will allow for further research by collecting the opinions of experts such as biogas plant users, local communities, local government officials and other stakeholders. In addition, further analysis of key factors will be carried out using the DEMATEL method for several scenarios. The PESTEL method will be used to identify key factors.

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Advancements and future prospects in in-situ catalytic technology for heavy oil reservoirs in China: A review

Wang,

Guo,

et al. 2024

Fuel

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Evaluation of enhanced oil recovery methods for mature continental heavy oil fields in China based on geology, technology and sustainability criteria

Cited by 7 publications

References 62 publications

Tough, Notch-Insensitive, Heat-Resistant Hydrogels Constructed by Vinylated Polylysine for Temporary Oilfield Water Plugging

Tough, Notch-Insensitive, Heat-Resistant Hydrogels Constructed by Vinylated Polylysine for Temporary Oilfield Water Plugging

Identification of Key Factors for the Development of Agricultural Biogas Plants in Poland

Advancements and future prospects in in-situ catalytic technology for heavy oil reservoirs in China: A review

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