Wellbore Completion for Methane Hydrate Production

摘要

In a completion for producing methane the bottom hole assembly has a base pipe with porous media surrounding it for equalizing flow along the base pipe. A shape memory polymer foam surrounds the porous media. The borehole can be reamed to reduce produced methane velocities. Surrounding the shape memory polymer is an exterior layer of consolidated proppant or sand that can self-adhere and/or stick to the polymer foam. The proppant or sand can be circulated or squeezed into position although, circulation is preferred. The borehole may enlarge due to shifting sands in an unconsolidated formation as the methane is produced. The bottom hole assembly helps in fluid flow equalization and protects the foam and layers below from high fluid velocities during production.

主权项

1. A completion method for methane production from methane hydrate, comprising:
running in a bottom hole assembly to an isolated producing zone; providing a plurality of discrete filtration layers with at least one inner layer on said bottom hole assembly and another outer layer that is independently delivered; adhering components of said outer layer to each other or to said at least one inner layer such that said inner and outer layers remain adjoining when the borehole enlarges and moves away from said outer layer as methane is produced.