Case History: A private oil company experienced sand failure
in an adjacent well to this offshore Louisiana well and wanted to explore ways to complete this well without a gravel pack,
in a savings of about $275,000.00.
The well data, along
with detailed thin section petrographic analysis of four sidewall core samples, was utilized to recognize low cohesive failure
by estimating the average sheer stress, giving the client
two options for avoiding the need for sand control via gravel pack:
• Option 1: Avoid perforating two thin zones marked as (F). This
option was deemed undesirable by the client.
• Option 2: Keep drawdown below 100 PSI for the first few weeks of
the initial well production, then gradually
increase the pressure incrementally to a maximum of 400 PSI. This second option was employed, and
no sands were produced during the first two years of production, as monitored by CMI.