Prof.  Mingwei  Zhao
China University of Petroleum, East China,  China

Title: Research Advances in the Functional Design of Novel Fracturing Fluid Systems for Deep Oil and Gas Reservoirs

Abstract:

As oil and gas exploration and development extend into deeper formations, which are characterized by harsh conditions such as micro-nano pore development, high temperature, high salinity, and ultra-long wellbores, fracturing technology has become an indispensable development method. As the "blood" of fracturing operations, fracturing fluids directly determine the success of development outcomes. The extreme environments in deep fracturing impose higher requirements on fracturing fluids and related auxiliary working fluids. This work systematically presents the latest research progress by our team in the functional design of novel fracturing fluid systems for deep oil and gas reservoirs, focusing on three key areas: "High-Temperature Resistant Fracturing Fluids for Deep Reservoirs," "Integrated Fracturing-Enhancement Fluid," and "Principles for Selecting Functional Additives." Under the "High-Temperature Resistant Fracturing Fluids" category, two main systems are introduced: first, a high-temperature resistant delayed cross-linking gel fracturing fluid, which utilizes delayed cross-linking technology to achieve a synergy between low viscosity for friction reduction in the wellbore and high viscosity with temperature resistance in the reservoir; second, a high-temperature resistant retarded gel acid fracturing system, primarily targeting deep carbonate reservoir fracturing. The "Integrated Fracturing-Enhancement Fluid" section highlights two systems: clean slickwater fracturing fluid and multifunctional active nanofluid. In the "Principles for Selecting Functional Additives" part, the application of enhanced oil-well cleanup agents is discussed in detail. The work elaborates on the molecular structure design, system construction methods, mechanism analysis, and representative field application cases for each system, aiming to provide valuable technical references and practical guidance for the efficient fracturing development of deep oil and gas resources.

Biography: