Stability of Gas Injection Using Lateral Wells in Layered Oil Reservoirs
The stability of gas injection in a layered reservoir drilled with lateral wells, is studied using a generalized pressure distribution-dependent mobility ratio expression. Stable injection guarantees clean oil production. The mobility ratio compared layers’ fluid velocities across a common permeable interface. Studies were based on injected gas compressibilities and viscosities only. Results show that injection stability is affected by (1) injected gas properties, and (2) injection layer; i.e., whether gas cycling (bottom layer injection) or gas injection (top layer injection). Gas cycling tends to exhibit more instability than gas injection operation.
Prof. A.O. Akii Ibhadode
E. S. Adewole and B.M. Rai, "Stability of Gas Injection Using Lateral Wells in Layered Oil Reservoirs ", Advanced Materials Research, Vols. 18-19, pp. 271-276, 2007