Fluid-Loss Control Using Crosslinkable HEC in High-Permeability Offshore Flexure Trend Completions

Abstract

An alternative system to conventional HEC (hydroxyethylcellulose) and particulate fluid loss materials has been developed for fluid loss control in high permeability Gulf of Mexico Flexure trend completions. In offshore operations, the problem of controlling fluid loss to the formation is critical in achieving successful gravel pack completions. The problem is magnified in this environment because of the use of expensive high density brine, lost rig time, and increased standards for well control and safety. A newly developed fluid loss system which consists of a cross linkable, derivatized HEC incorporating a branched ·functional group oil an HEC backbone has been evolving in the industry.The functional group provides a nonionic reaction site which allows the polymer to be crosslinked at a low pH, and broken in a controlled manner using a newly developed breaker.

Isolation of a Horizontal Hole Section in an Openhole Well Using a NonDamaging Temporary Gel Plug to Facilitate Hydrocarbon Production from the Remaining Lateral Section - A Case History from Kuwait

“…[1][2][3][4][5][6][7][8] Crosslinking has been achieved by raising the pH of the polymer to above 10 to promote suitable backbone configuration.…”