Techshore Enhanced Oil Recovery

Techshore: Enhanced Oil Recovery

Recovery of oil and gas from the reservoir is the important part. Oil and gas is inside the reservoir and we need to take it out to the surface. it is called as recovery technique. Initially the oil will be having a pressure and will come naturally to the surface of the earth called primary recovery or natural recovery. After wards we will go for artificial lifts. Artificial lift is mainly used for providing an additional energy. In case of oil drilling if the crude oil is not coming outside naturally means we will apply an additional force to pump the oil from the reservoir to the surface area. When the oil pressure reduces and it reaches a bubble point we will think about artificial lifts. They are mainly of four different types. First is beam pump. Here a beam is introduced and it is moving up and down. By this to and forth movement or reciprocating movement of the beam pump it will lift the oil upwards to the surface. The motor and pump are placed on the surface. The second method used in the advanced stage is called as Electrical submersible pumping (ESP). Here the motor and pump are placed inside the reservoir. As the motor operates the oil will enters inside the centrifugal pump by the external pressure which is excreted by the motor. The third method is Progressive cavity pumps (PCP). Here the pump will be inside the tube and the motor will be placed outside. In this method we are increasing the pressure inside the reservoir and pumping out the oil.

If the oil is above 30 API that oil is called as Light Crude Oil.  If the oil is in between 20 and 30 API we consider it as Medium Oil. If it is in between 10 and 20 we consider it as Heavy Crude Oil. If our reservoir is having heavy oil we cannot recover it by any above mentioned methods. In such cases we are using EOR (Enhanced Oil Recovery). For this we are mainly using three methods.

Ø Thermal Recovery

Ø Chemical Flooding

Ø Miscible Gas Injection