Repairing Casing Leaks Using Small-Particle-Size Cement

Abstract

Summary Emerging small-particle-size cement technology has been applied successfully to one of the oil field's most frustrating problems, repairing tight casing leaks. Because of these leaks, a continuous injection rate cannot be established, yet test pressure leaks off 300 to 500 psi in 10 to 20 minutes. Confirmed through experimental data and more than 100 field operations, a new approach offers exceptionally high success rates for these troublesome leaks. This paper presents a detailed introduction to these new cement systems, along with comparative studies of small-particle-size cement vs. standard oilfield cements. This paper also discusses repair methods, several case histories, and field jobs performed to date.