GAS LIFT: PRODUCING MARGINAL FIELDS USING HIGH GAS RESERVOIR PRESSURE AS CONTINUOUS GAS SOURCE

GAS LIFT: PRODUCING MARGINAL FIELDS USING HIGH GAS RESERVOIR PRESSURE AS CONTINUOUS GAS SOURCE

URCE

¹Akpoturi Peters, ²Oby Ejelonu, ³Uti Mark & ³Umukoro George

¹Department of Petroleum Engineering, Federal University of Petroleum Resoures, Effurun

²Department of Petroleum Engineering, PTI, Effurun, Delta State

³Department of Petroleum Engineering, Delta State University, Abraka    

ABSTRACT

Gas lift is one of the eight artificial lift technique applied to enhance the productions of oil wells (natural flowing or dead due to higher hydrostatic pressure over the reservoir pressure required to overcome it). The two major disadvantages of gas lift are; continuous source of high pressure gas and work over of, wells to install side pockets mandrel(s) for gas injection especially where gas lift was not initially planned before well completion. In Nigeria the above constrains are obvious especially when considering gas lifting of marginal, depleted fields and water logged wells. The paper presents a case where this class fields have been economically produced considering the presence of map gnus! High pressure gas reservoir as continuous gas source and use of wire line operated perforator and wire line retrievable pack off tubing assembles. This process could be used to sustain optimal production of similar fields to abandonment without necessarily leaving sustainable oil and gas reserves in place.