Using Downhole Displacement and Inferred Production for Verification of Measured Test Data

Louis Ray
2000 Proceedings of SPE/AAPG Western Regional Meeting   unpublished
This paper describes a technique used to verify measured well test data in shallow rod pumped fields. Typically, the availability of measured well test data is constrained by test facility accuracy and the availability of the test facility for acceptable testing frequency. This technique involves the use of RPC (Rod Pumped Controller) calculated total fluid production as one source of production data for each well. A second source of production data comes from a wave equation driven diagnostic
more » ... driven diagnostic software program. This program uses load and position data gathered from each RPC to generate a downhole card from which pump displacement (production) can be calculated for all wells. The measured well test data for each well can then be compared to the "inferred production" and the "downhole displacement" data for any observed discrepancy. "Inferred production" and "downhole displacement" make it possible for operating personnel to track daily individual well production with a high degree of accuracy without the use of actual well gauging facilities that might not be available on demand or that give questionable results. This paper will also address methods necessary to setup RPC inferred production for reasonably accurate results, as well as necessary techniques for good displacement calculations from RPC dynagraph cards. These techniques involve the use of central site software for RPC setup and data telemetry.
doi:10.2523/62540-ms fatcat:hf65tafmunb6jma6fxb52wtn6m