Proposal
Hunton Reservoir in Oklahoma represents one of the largest discoveries in Oklahoma in recent history.Since 1995, several fields in Hunton Reservoir have been exploited by various operators.The principle behind this exploitation remains the same.The wells produce large quantities of water, and along with it, significant quantities of gas, and sometimes, oil.Examination of various fields producing from Hunton reservoir indicates that the economic success from these fields is not uniform.Some fields produce significant quantities of oil, whereas, some fields only produce gas.In some fields, horizontal wells work the best, whereas, in some other fields, vertical wells do a good job.The water production from the fields ranges from as low as few hundred barrels per day to several thousands of barrels per day.
In this paper, we present the results from various fields to indicate the parameters needed in Hunton field to make it economically successful.We restrict our evaluation to parameters which can be easily measured or are readily available.These include log data (gamma ray, resistivity, neutron and density), initial potential data, production data (oil, gas, and water – if available) and well configuration (vertical or horizontal).By comparing the recovery of oil and gas to various reservoir parameters, we develop methodology for predicting the future success of the field.For example, a clear relationship exists between porosity of the rock and initial hydrocarbon saturation.Higher the oil saturation better is the recovery factor. Initial potential is critical in determining the possible recovery.Horizontal wells cost 1.5 to 2 times more than vertical wells, but may not provide the additional recovery to justify the costs.
Hunton formation is extensive in Oklahoma.If we want to extend the success of some of the fields to other areas, we need clear guidelines in terms what is needed to exploit those fields.This paper provides some of those guidelines based on the examination of the currently producing fields.
