Influence of finite velocity of disturbance propagation on pressure build up or draw down

Authors: V.A. Iktisanov, A.V. Bajgushev (TatNIPIneft), L.I. Garipova (Almetievsk State Oil Institute)
It is noted that available methods of pressure build up or draw down interpretation are based on assumption of infinite velocity of disturbance propagation in reservoir. Solution algorithm for finite velocity of disturbance was suggested based on Khristianovich’s and Molokovich’ papers. The problem was solved with account for skin-factor and wellbore storage coefficient. Using of suggested algorithm is critical for pressure build up or draw down interpretation at low value of wellbore storage coefficient.
It is noted that available methods of pressure build up or draw down interpretation are based on assumption of infinite velocity of disturbance propagation in reservoir. Solution algorithm for finite velocity of disturbance was suggested based on Khristianovich’s and Molokovich’ papers. The problem was solved with account for skin-factor and wellbore storage coefficient. Using of suggested algorithm is critical for pressure build up or draw down interpretation at low value of wellbore storage coefficient.


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