Core-shell polymer microsphere PSN@SiO2 based on “dry water microreactor” for enhanced oil recovery and its properties

Yu, Xiaorong; Ji, Renjing; Li, Qinghong; Yong, Shuo; Yang, Huan; Su, Gaoshen

doi:10.1016/j.geoen.2024.212972

Cited by 1 publication

(1 citation statement)

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“…Montmorillonite (MMT), a type of layered aluminosilicate clay mineral, with its cation exchange capacity and adsorption properties, has garnered considerable attention in applications [94,95]. Polymerlayered silicate (PLS) is a widely studied nanocomposite material, resulting from the combination of polymers and layered silicates, forming a continuous phase with dispersed phases [96][97][98]. A novel guar gum-montmorillonite nanocomposite material was prepared using the solution intercalation method [99].…”

Section: Fracture-pore Coupling Frictional Resistance Evolutionmentioning

confidence: 99%

A Review of Fracturing and Enhanced Recovery Integration Working Fluids in Tight Reservoirs

Shang,

Dong,

Tan

et al. 2024

Processes

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Tight reservoirs, characterized by low porosity, low permeability, and difficulty in fluid flow, rely on horizontal wells and large-scale hydraulic fracturing for development. During fracturing, a significant volume of fracturing fluid is injected into the reservoir at a rate far exceeding its absorption capacity. This not only serves to create fractures but also impacts the recovery efficiency of tight reservoirs. Therefore, achieving the integration of fracturing and enhanced recovery functions within the working fluid (fracturing-enhanced recovery integration) becomes particularly crucial. This study describes the concept and characteristics of fracturing-enhanced recovery integration and analyzes the types and features of working fluids. We also discuss the challenges and prospects faced by these fluids. Working fluids for fracturing-enhanced recovery integration need to consider the synergistic effects of fracturing and recovery; meet the performance requirements during fracturing stages such as fracture creation, proppant suspension, and flowback; and also address the demand for increased recovery. The main mechanisms include (1) enlarging the effective pore radius, (2) super-hydrophobic effects, and (3) anti-swelling properties. Fracturing fluids are pumped into fractures through pipelines, where they undergo complex flow in multi-scale fractures, ultimately seeping through capillary bundles. Flow resistance is influenced by the external environment, and the sources of flow resistance in fractures of different scales vary. Surfactants with polymerization capabilities, biodegradable and environmentally friendly bio-based surfactants, crosslinking agents, and amino acid-based green surfactants with outstanding properties will unleash their application potential, providing crucial support for the effectiveness of fracturing-enhanced recovery integration working fluids. This article provides important references for the green, efficient, and sustainable development of tight oil reservoirs.

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