Flow assurance

Study Investigates Hydrate Formation Risk in WAG Changeover Operations

This study investigates hydrate formation in a water-alternating-gas injection well under water-to-gas and gas-to-water changeover operations.

Hydrate formation and dissociation curves schematic with required subcooling for hydrate formation
Hydrate formation and dissociation curves schematic with required subcooling for hydrate formation.
Source: SPE 218101.

Hydrate formation is a flow-assurance challenge for offshore oil and gas operations with subsea pipelines, wells, and tiebacks. In water-alternating-gas (WAG) operations, hydrates can form within the injection wells when switching from water to gas and vice versa. This study investigates hydrate formation in a WAG injection well under water-to-gas and gas-to-water changeover operations.

Introduction

Few previous studies have focused on hydrate formation in gas injection and production wells. Hydrate formation in a gas well under particular enhanced oil recovery techniques requires more attention.

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