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 …

In recent years, with the further development of old oilfields, in order to further improve the oil
recovery, they must be conformance controlled. Among various types of conformance control …

The BST oilfield in the northwestern Taklamakan Desert is a fractured carbonate reservoir,
but issues of water breakthrough are becoming increasingly severe with the development of …

A high-strength gel was prepared by crosslinking a high-concentration but low molecular
weight polyacrylamide-tert-butyl acrylate (PAtBA) copolymer with polyethyleneimine (PEI) …

By using an acrylamide (AM)-acrylamide propyl sulfonate (AMPS) copolymer crosslinked
with hydroquinone (HQ) and hexamethylenetetramine (HMTA), a stable gel was prepared at …

High water cut of produced fluid is one of the most common problems in reservoir
development. At present, injecting plugging agents and other profile control and water …

This article explores challenges in gel treatments, including polymer dissolution, gelation
time, gel strength, stability, resistance to brine flow, and permeability damage in oil …

A gel conformance treatment is a complex process that has to be adapted to reservoir
conditions such as pH, temperature and salinity. For instance, high temperature and low …

Betaine is a new surfactant with good application prospects in high-temperature and high-
salinity reservoirs. The interfacial properties of two kinds of betaine mixtures with a good …

Mature carbonate reservoirs under waterflood in Kuwait suffer from relatively low oil
recovery due to poor volumetric sweep efficiency, both areal, vertically, and microscopically …