Abstract
Publisher Summary This chapter discusses the evaluation and monitoring of enhanced oil recovery projects based on geophysical well logging techniques. When old oilfields approach the economic limits of production by secondary recovery, a re-evaluation of the saturation distribution of the producing formation and its petrophysical properties frequently leads to the rejuvenation of the field or implementation of new enhanced oil recovery techniques. Properly selected and applied well logging suites and associated modern well logging interpretation techniques assist in the (1) redevelopment of oilfields, (2) exploration for and recompletion in potential reservoir stringers behind casing that had been passed up earlier, (3) monitoring production behavior and reservoir depletion, (4) proper planning of enhanced oil recovery projects, (5) determination of residual oil saturation, and (6) evaluation and monitoring of infill and observation wells. In this chapter, an overview of completion constraints and borehole integrity checks is presented. Reservoir porosity determination is described. Cased observation wells are discussed. An overview of digital log analysis (EPILOG) techniques, using neutron lifetime logging, is also presented in the chapter.
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