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| Drainage area || [[Lateral]] migration distance #* ''M'' = migration efficiency

* [[Gravity]] drainage ==Gravity drainage==

...when one or more of the primary drive mechanisms are assisted by ''gravity drainage''. Table 1 shows the energy sources and ultimate recovery ranges of the maj | Gravity drainage

...ing pore volume and S_w. Recovery of hydrocarbons depends on the efficiency of the [[Reservoir drive mechanisms|reservoir drive mechanism]]. Predicting ...ating how much difference pore type and reservoir heterogeneity impact the efficiency of the drive mechanism. To estimate the recovery factor, use the procedure

...and the same permeability as flow unit 2. However, in terms of fluid flow efficiency and storage, as shown by the K_a/Φ ratio or r₃₅, flow ...quations. The K_a/Φ ratio reflects rock quality in terms of flow efficiency of a reservoir sample. When clastics and carbonates are deposited, they hav

* An approximation of the recovery efficiency during primary or secondary recovery. ...pg|Figure 3]]), resulting in the injection curve (which is also called the drainage curve because the wetting phase is being drained from the sample).

...have some degree of look-ahead capability to try and maximize the steering efficiency. The current created by the tool can have a sufficient depth of penetration ...us baffles parallel to the wellbore will severely restrict the contactable drainage volume. It is better to drill strongly layered reservoirs like these with s

...the reservoir, and vertical and [[lateral]] [[Enhanced oil recovery|sweep efficiency]] of [[Waterflooding|secondary and tertiary recovery projects]]. Heterogene

...have some degree of look-ahead capability to try and maximize the steering efficiency. The current created by the tool can have a sufficient depth of penetration ...us baffles parallel to the wellbore will severely restrict the contactable drainage volume. It is better to drill strongly layered reservoirs like these with s

...layer-cake tabular geometries || Excellent lateral continuity, high sweep efficiency, aquifers common || M91FG102.JPG|{{figure number|3}}Vertical flow barriers can control the drainage patterns in a reservoir. The degree to which individual barriers are effect

| Permeability contrast between fractures and matrix reduced sweep efficiency in [[Waterflooding|flooding]] ...sist || Nonrecognition of the fracture system leads to poor estimations of drainage area and [[Reserves estimation|reserves]] per well and unusual response in

...r<ref name=Hartmanandpaynter_1979>Hartman, J. A., and D. D. Paynter, 1979, Drainage anomalies in Gulf Coast Tertiary sandstones: Journal of Petroleum Technolog ...and production wells to sweep individual distributary channels. The sweep efficiency in the distributary channels will be low without direct injection support,

...forms must be included in dynamic simulations to accurately predict likely drainage patterns and ultimate recovery of hydrocarbons.<ref name=Jckson2009 /> ...assess the potential impact of flow barriers associated with clinoforms on drainage patterns and hydrocarbon recovery.

...a feature likely to disrupt horizontal fluid inflow is present within the drainage radius of the well, then this can often be detected. The fault will disrupt ...on the other hand, create numerous dead ends, which will reduce the sweep efficiency of a waterflood. Nonsealing subseismic faults form cross-fault juxtapositio