Tamar is a high permeability clastic gas reservoir that behaves like a well-connected tank, in many respects. At the same time, it has a significant level of complexity. The reservoir is comprised of three sand intervals, which are separated vertically by shales and broken into a number of fault blocks. While the degree of aquifer support has been an uncertainty, it is believed that the field demonstrates components of both bottom water and edge water drive.
All Tamar wells were equipped with permanent downhole pressure and temperature gauges, and the surveillance of these pressure and rate data over the five-year production history has provided an unusually comprehensive data set. This dataset supports the high-resolution evaluation of well interferences and multi-well analysis.
Investigation of the data on a well-by-well basis using conventional Pressure Transient Analysis techniques provided valuable insights, albeit primarily at the fault block scale. However, extending these investigations to the field scale generated some conflicting interpretations which could not be resolved by traditional PTA and standard reservoir engineering techniques.
Number of Pages
Needham D.L., Pettingill H.S., Christensen C.J., ffrench J., Karcz Z. (Kul). 2017. The Tamar Giant Gas Field: Opening the Subsalt Miocene Gas Play in the Levant Basin. AAPG Memoir 113, p 221-256.
Levitan M.M. 2007. Deconvolution of Multiwell Test Data. SPE Journal: 420-428, December 2007. SPE-102484-PA.
Levitan M.M. 2012. Deconvolution of Pressure and Rate Data From Gas Reservoirs With Significant Pressure Depletion. SPE Journal: 727-741, September 2012. SPE-134261-PA.
Bourdet, D.P., Whittle, T.M., Douglas, A.A. and Pirard, Y.M. 1983. A New Set of Type Curves Simplifies Well Test Analysis. World Oil, May, 95-106. Gulf Publishing Co., Houston.
Raghavan, R. Well Test Analysis. PTA Prentice Hall, Inc.
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