Model to Study Pressure Begavior of Horizontal Well Subjected by Both Bottoms Water and Gas Cap at Late Time

A model to study the behavior of pressure in a horizontal well subjected by both bottom water and Gas cap and bottom water drives at a late period has been developed using source function and numerical technique was used for the computation from the results. The following are pressure decreases with time to when tD=1000 and pressure derivative also decrease to when tD =100. The pressure became stable when tD ≥100 as shown in Figures 2,3 and 4. This behavior is an indication that reservoir fluid has encountered a boundary. From Figure 3 and 4, it was observed that the decline rate increases with time to a point when tD ≥100. At this point, the Gas cap which acts as a drive is not active. Hence, there will be no increase in production at this stage.