Kill fluid for oil field operations

Patent · Tue Aug 14 00:00:00 EDT 1990

OSTI ID:6504955

Sydansk, R D

This patent describes a process employing a kill fluid to substantially reduce the volumetric flow of formation fluid into a wellbore penetrating a formation containing the formation fluid below an earthen surface. It comprises: admixing components of a continuous flowing gel at the surface comprising of water-soluble carboxylate-containing polymer, a complex capable of crosslinking the polymer and formed of at least one electropositive chromium III species and at least one electronegative carboxylatespecies, and an aqueous solvent for the polymer and the complex; crosslinking the polymer and the complex to form the gel, wherein the kill fluid comprises the gel; placing a volume of the kill fluid in the wellbore sufficient to create a hydrostatic head which exerts a kill fluid pressure against the formation fluid substantially equal to or greater than the formation fluid pressure and thereby substantially reduces the volumetric flow of the formation fluid into the wellbore; performing an oil field operation after placing the volume of the kill fluid in the wellbore; and removing the gel from the wellbore to substantially restore the volumetric flow of the formation fluid into the wellbore.

• Assignee: Marathon Oil Co., Findlay, OH (USA)
• Patent Number(s): US 4947935; A
• Application Number: PPN: US s 7-380057
• OSTI ID: 6504955
• Resource Relation: Patent File Date: 14 Jul 1989
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
42 ENGINEERING
DRILLING FLUIDS
CHEMICAL REACTION KINETICS
OIL FIELDS
OIL WELLS
FLUID FLOW
CHEMICAL COMPOSITION
ENHANCED RECOVERY
GELS
POLYMERS
COLLOIDS
DISPERSIONS
FLUIDS
GEOLOGIC DEPOSITS
KINETICS
MINERAL RESOURCES
PETROLEUM DEPOSITS
REACTION KINETICS
RECOVERY
RESOURCES
WELLS
020300* - Petroleum- Drilling & Production
420400 - Engineering- Heat Transfer & Fluid Flow
023000 - Petroleum- Properties & Composition