Dimensionless Pressure

If an oil reservoir has significant height and is bounded laterally by sealing boundaries, optimizing oil production using a horizontal well requires varying the well location along the open vertical axis, especially in highly anisotropic reservoirs. This work analyzes early, transitional, and late-time dimensionless pressure and its derivative responses for a horizontal well in an anisotropic reservoir that is vertically unbounded but laterally sealed.

When a reservoir is bounded by one or more constant pressure boundaries, such as aquifer or gas cap, the main expectation of the production engineer is to delay the arrival of either water or gas into the well completed in the reservoir to optimize oil production. To achieve this expectation, it is important to understand fluid flow pattern through the reservoir system when oil is produced through the well.