This article descrobes the drilling program and other Well Design considerations for Well Control 1 Drilling programme The drilling programme is based on the information provided by the subsurface department and in summarized in the Well Planning Datasheet. It should include in particular: A statement on shallow gas. Formation characteristics: permeability, fluid type, hydrocarbon depths, … Well Control – Well Design

Some areas are notorious for the presence of hydrostatically pressured gas pockets at relatively shallow depths. 1 Prediction of shallow gas Although the location of gas pockets is difficult to predict, high resolution seismic data acquisition, processing and interpretation techniques increase the reliability of the shallow gas prognosis and therefore, surveys are to be recommended. … Well Control – Shallow Gas

this article discuss the suitability of barrier for the following: Fluids Mechanical Barriers in completed Wells Sub-surface Safety Valve Sustension of a perforated well (with xmas tree) Sub Sea Well Suspensions Two Way Check Valve (TWCV) 1. Fluids as a Barrier Only drilling mud can be defined as a truly independent fluid well barrier. It … Discussion on Suitability of Barriers (well control)

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