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Petroleum Reservoir Engineering Practice by Nnaemeka Ezekwe

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Chapter 15. Immiscible Fluid Displacement

15.1 Introduction

Most of the oil and gas recovered from reservoirs is displaced immiscibly by water and/or gas. The displacement could be in the form of solution gas drive, gas cap expansion, water influx from aquifers or injection of water and/or gas. Solution-gas drive, gas cap expansion, and water influx from aquifers are essentially natural processes that supply energy to the reservoir for hydrocarbon recovery. Gas and water injection are designed and installed to artificially supply energy to the reservoir and thereby improve hydrocarbon recovery. It is important to understand the fundamental processes that occur when reservoir fluids are displaced immiscibly by gas or water. The displacement ...

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