Date: ON REQUEST
When formation pressure is not high enough to overcome the hydrostatic head (the
total weight) of the fluid in the well tubing, the well will not flow. Gas lift can be used in both
these cases to make the wells flow. Some producing wells need help in getting the oil to flow to
the surface because of low sub‑surface pressure on the oil in the formation.
This help can be provided by the use of sub‑surface pumps. The purpose of doing acid
stimulation on a well is to increase the production rate of the well. Production rate is increased by
increasing the permeability of the formation rock near to the well bore. The purpose of doing
fracture stimulation on a well is to increase the production rate, as well. This is done by
improving the natural drainage conditions (natural conductivity) around the well bore.
Explain why ‘fracturing’ is used to increase production from a well. Describe what happens in the
formation during fracturing. Identify the major components of equipment required to conduct
well fracturing. Describe how ‘Proppants’ can be used to enhance the results of fracturing.
Explain the principles/operation of a gas lift system in an oil well. Identify the major parts of a gas lift system. Explain why acid stimulation is required. Describe the action of acid on the formation. Identify the major components of equipment required to conduct acid stimulation.
Explain the expected results of a successful well stimulation. Explain why ‘PERF‑PAC’ balls would be used during a well stimulation. Explain the principles of recovery using an electric sub‑surface pumping unit. Identify/explain the major components of an electric sub‑surface pump installation.
Artificial Subsurface Pumps and Basic Principles of Recovery (Improving Inflow Performance and Reservoir Pressure Maintenance). Subsurface Pump Installation; Basic Components of the System. Fracture Stimulation, Proppants, Fracturing Fluids, Fluid Additives, Mixing of Fracturing Fuids, and Equipment used for Fracture Stimulation. Acid Stimulation, Types of Acids & Additives, Perf-Pac Balls, Acid Penetration and Formation Dam age
Principles and Operations of Gas Lift; Unloading Sequence in a well to be Gas lifted and Kickover Tools. Gas Lift Valves: Tubing Pressure Operated & Casing Pressure Operated.
Parameters to monitor in order to optimize gaslift. Gas lift valves: gas lift installations.
Faculty: Professor Duru Appah and Engr.Ubani Chikwendu , IPS, Uniport and Mr M.I. Ofili