Question

The following questions have equal marks. a. For a particular well drilled into a newly discovered oil reservoir, fully explain the difference(s) between effective drainage area and effective wellbore radius. b. What does parameter 'c' represent in the radial diffusivity equation as derived in Chapter 6? Define every single parameter included in the mathematical equation used to calculate 'c' for an under-saturated oil reservoir and elaborate in details why every one of those parameters needs to be considered in calculating 'c'? dPwf C. Explain in details how you may expect to change during production from a closed dt oil reservoir. Use a suitable schematic graph to support your answer. You are also required to provide a detailed discussion as why the changes should follow your expected trend/behaviour. d. Explain in details the significance of the concept defined by the following equation. Provide two example situations where this concept can be of use in designing/characterising reservoir engineering related processes. n 0.000264k puc e. Which particular stabilised flow condition is the basis for conducting deliverability analysis on gas wells? Fully explain the rationale behind this particular choice. Provide one example situation where we may see deviation from this flow condition.