Mature oilfields usually encounter the problem of high watercut. It is practical to use chemical methods for water-shutoff in production wells, however conventional water-shutoff agents have problems of long gelation time, low gel strength, and poor stability under low temperature and high salinity conditions. In this work a novel polymer gel for low temperature and high salinity reservoirs was...

Water soluble pullulan films were formatted into paper-based microfluidic devices, serving as a controlled time shutoff valve. The utility of the valve was demonstrated by a one-step, fully automatic implementation of a complex pesticide assay requiring timed, sequential exposure of an immobilized enzyme layer to separate liquid streams. Pullulan film dissolution and the capillary wicking of aq...

Abstract This paper provides an introduction to the topic of water shutoff and conformance improvement. After indicating volumes produced during oilfield operations, a strategy is provided for attacking excess production problems. Problem types are categorized, typical methods problem diagnosis mentioned, range solutions introduced each type. In third section paper, concept disproportionate per...

High water-cut oil production is one of the major issues in petroleum industry. The present study investigates different profile control solutions, with an emphasis on selective methods and materials that mostly decrease permeability water-saturated reservoir areas. To achieve water flow blockage fractured porous media, sodium silicate-based gel-forming composition was developed. test procedure...

Like all viruses, influenza viruses (IAVs) use host translation machinery to decode viral mRNAs. IAVs ensure efficient translation of viral mRNAs through host shutoff, a process whereby viral proteins limit the accumulation of host proteins through subversion of their biogenesis. Despite its small genome, the virus deploys multiple host shutoff mechanisms at different stages of infection, there...

One highly undesirable characteristic of mature assets that inhibits oil recovery is high water production. Polymer gel treatment a popular conformance improvement technique applied in this regard due to its cost effectiveness and proved efficiency. Despite popularity, optimum performance polymer hydrogels shut off inhibited by excessive aggregation, difficulty controlling gelation, their insta...

The ability to shut off host gene expression is a shared feature of many viral infections, and it is thought to promote viral replication by freeing host cell machinery and blocking immune responses. Despite the molecular differences between viruses, an emerging theme in the study of host shutoff is that divergent viruses use similar mechanisms to enact host shutoff. Moreover, even viruses that...