Use of Pressure Gauges in Liner Running Strings during Liner Cementing Operations

摘要

With surface measurements alone, liner cementing operationsare difficult to interpret because of the dampening effects ofthe mud and greater overlaying pressure events such as cementfree fall. In April 2001, an operator in the North Sea started touse downhole memory pressure gauges in the liner runningstring to gather pressure data for evaluation of liner equipmentperformance and cement placement. The collected data hasshown downhole pressure effects that have not been seen withsurface pressure measurements. This data also allowscomparison of actual and simulated downhole pressure, whichcan improve cement job simulations.