The Practice of Reservoir Engineering

Part 1 Introduction to reservoir engineering: activities in reservoir engineering; basic themes of the text; the role of reservoir engineers; technical responsibilities of reservoir engineers; the physical principles of reservoir engineering; references. Part 2 The appraisal of oil and gas fields: introduction; pressure-volume-temperature fluid properties for oil; calculation of the stock tank oil initially in place; field utilisation/equity determination; calculation of gas initially in place (GIIP); pressure-depth plotting; application of the repeat formation tester; pulse testing using the repeat formation tester; appraisal well testing; extended well testing; references. Part 3 Material balance applied to oilfields: introduction; derivation of the cumulative material balance for oil reservoirs; necessary conditions for application of material balance; solving the material balance (knowns and unknowns); comparison between material balance and numerical simulation modelling; the opening move in applying material balance; volumetric depletion fields; water influx calculations; gascap drive; compaction drive; references. Part 4 Oilwell testing: introduction; essential observations in well testing; well testing literature; the purpose of well testing; basin, radial flow equation; constant terminal rate solution of the radial diffusity equation; the transient constant terminal rate solution of the radial diffusivity equation; difficulties in application of the constant terminal rate solution of the radial diffusivity equation; superposition of CTR solutions; single rate drawdown test; pressure buildup testing (general description); Miller, Dyes, Hutchinson (MDH) pressure buildup analysis; Horner pressure buildup analysis; some practical aspects of appraisal well testing; practical difficulties associated with Homer analysis; the influence of fault geometries on pressure buildups in appraisal well testing; application of the exponential integral; pressure support during appraisal well testing; well testing in developed fields; multi-rate flow testing; log-log type curves; the elusive straight line; references. Part 5 Waterdrive: introduction; planning a waterflood; engineering design of waterdrive projects; the basic theory of waterdrive in one dimension; the description of waterdrive in heterogeneous reservoir sections; waterdrive under segregated flow conditions (vertical equilibrium VE); waterdrive in sections across which there is a total lack of pressure equilibrium; the numerical simulation of waterdrive; the examination of waterdrive performance; difficult waterdrive fields; references. Part 6 Gas reservoir engineering: introduction; PVT requirements for gas condensate systems; gas field volumetric material balance; the dynamics of the immiscible gas-oil displacement; dry gas recycling in retrograde gas-condensate reservoirs.