This paper provides an introduction to the topic of water shutoff and conformance
improvement. After indicating the volumes of water produced during oilfield operations, a …

For the past decades, long-term water flooding processes have led to water channeling in
mature reservoirs, which is a severe problem in oilfields. The development of better plugging …

Conventional drilling fluid (DF) technologies commonly fail to meet many of the
requirements of modern drilling under various harsh subsurface conditions, particularly …

Emulsions, including oil-in-water (O/W) and water-in-oil (W/O) emulsions, can play important
roles in both controlling reservoir conformance and displacing residual oil for enhanced oil …

The number of deep wells and ultra-deep wells drilled worldwide is gradually increasing,
and the problem of deep well leakage has become one of the challenges in drilling. The …

Carbon capture and storage (CCS) technology has been widely investigated to decrease
the greenhouse effect. Geological CO2 storage sites are targeted mainly on depleted …

Gel treatment has been widely applied to control conformance for improving oil recovery and
control water production in mature oil fields. However, most of the hydrogel systems are …

Polymer gel systems have been widely applied to control excessive water and improve oil
recovery (IOR) in petroleum reservoirs. They are usually divided into two main types, in-situ …

Research progress of self-healing hydrogels based on both reversible covalent and
reversible non-covalent bonds are systematically reviewed. The preparation methods …

Temporary plugging agent (TPA) is widely used in many fields of petroleum reservoir drilling
and production, such as temporary plugging while drilling and petroleum well stimulation by …