gas migration

February 3, 2018 By Lenin Diaz 2 Comments

Gas migration and surface casing vent flow (SCVF) issues and prevention

Please read and comment on the following fascinating article about SCVF problems written by my invited expert: Djilali Sahnoun – Technical & Engineering Manager. Many wells experience surface casing vent flow (SCVF) and subsequent gas migration to the surface through one of the following issues: a cemented casing string(s) with either a micro-annulus between casing and cement, a […]

January 7, 2017 By Lenin Diaz Torres 6 Comments

Gas Migration: 5 Truths (Primary Cementing)

First of all, I would like to define what Gas Migration is, from an acceptable industry reference: “Gas migration is the invasion of formation fluids (gas in this case) into the annulus due to a pressure imbalance at the formation face, where the fluids (gas) may migrate to a lower pressure zone or possibly to […]

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