Publications by authors named "Liyao Dai"
Article Synopsis
- - The petroleum industry's growth has created a need for advanced oilfield working fluids, with liquid foam being a popular choice due to its benefits like low density and effective fluid diversion.
- - However, the limited lifespan of foam hinders its usage, leading to the exploration of cellulose nanomaterials (CNMs) which enhance foam stability and environmental friendliness.
- - This review discusses the types and preparation of CNMs, their use in stabilizing Pickering foams for oilfield applications, and outlines future challenges and opportunities for making the petroleum industry more eco-friendly.
When encountering heavy oil reservoirs during drilling, due to the change in pressure difference inside the well, heavy oil will invade the drilling fluid, and drilling fluid will spill into the reservoir along the formation fractures, affecting the drilling process. A supramolecular polymer gel-based temporary plugging agent was prepared using acrylamide (AM), butyl acrylate (BA), and styrene (ST) as reacting monomers, N, N-methylenebisacrylamide (MBA) as a crosslinking agent, ammonium persulfate (APS) as an initiator, and poly(vinyl alcohol) (PVA) as a non-covalent component. A supermolecular polymer gel with a temperature tolerance of 120 °C and acid solubility of 90% was developed.
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- Cellulose derivatives like carboxymethyl cellulose (CMC) and cellulose nanomaterials (CNMs) are gaining popularity as eco-friendly additives in water-based drilling fluids (WBDFs) due to their biodegradable and biocompatible nature.
- CNMs, which include cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs), offer unique properties such as a large surface area and enhanced mechanical performance, making them effective rheological modifiers and fluid loss reducers in drilling applications.
- The review discusses the structure, synthesis, and specific applications of these cellulose derivatives in WBDFs, while also addressing the challenges and future research directions for their effective use.
Pickering foam is a type of foam stabilized by solid particles known as Pickering stabilizers. These solid stabilizers adsorb at the liquid-gas interface, providing superior stability to the foam. Because of its high stability, controllability, versatility, and minimal environmental impact, nanomaterial-stabilized Pickering foam has opened up new possibilities and development prospects for foam applications.
View Article and Find Full Text PDFPolymer gel lost circulation control technology is a common and effective technique to control fractured lost circulation. The performance of a lost circulation control agent is the key to the success of lost circulation control techniques. In this study, rheological tests were used to study the physical and chemical properties of a shear thixotropic polymer gel system, such as anti-dilution, high temperature resistance and high salt resistance.
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