Abstract:
Reservoir management requires static bottom-hole pressures (SBHP) to assess the depletion stage and intra reservoir communication. SBHP and average reservoir pressure estimated from these are used to update the reserves for the wells and the field. Further, these are essential requirement of history match phase of the reservoir simulation studies. For better reservoir monitoring, it is essential to acquire pressure points as frequently as possible. Wells are shut in for a time period dictated by reservoir permeability to acquire SBHP. Shut-in of the well hinders the revenue generation, which affects the economics of the field. Therefore, acquiring of SBHP some time is declined by the management during high marketing pressure times. One can find correlations to estimate bottom hole flowing and static pressures from well head flowing and shut-in pressures, respectively. But there is no methodology to estimate bottom hole static pressure without shutting in of the wells. Estimation of SBHP from flowing well head pressures is beneficial for reservoir monitoring and management. This paper presents a method which uses well head flowing pressures recoded during multi rate draw down test or choke performance test. Correlations modeling well bore dynamics are integral part of this methodology. This method is helpful to save production loss and expenditure on Service Company for acquisition of SBHP data. This method has been tested by simulation results of reservoirs of various types. It has been also applied to real data set of a producing field. The method has estimated reservoir pressure with reasonable accuracy.
Page(s):
243-249
DOI:
DOI not available
Published:
Journal: Proceedings SPE-PAPG Annual Technical Conference, Volume: 0, Issue: , Year: 2008