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...ross a fault and consequent leakage. This process occurs when the pressure depletion is sufficiently rapid, or the fault has sufficiently low [[permeability]], ...ng-top-and-fault-seal_fig10-34.png|300px|thumb|{{figure number|1}}Pressure depletion curves for two wells separated by an initially cross-sealing fault.]]

...apitalized expenditures are determined by a set of rules for depreciation, depletion, and amortization. ...re are two methods of calculating depletion: cost depletion and percentage depletion. (See “[[Determining owners of oil and gas interests]]" and "[[Methods of

==Selective depletion by diffusion==

.... The initial pressures of both wells lie on a common, field-wide pressure depletion curve. .... The initial pressures of both wells lie on a common, field-wide pressure depletion curve.

==Effect of depletion on IPR formulas== [[file:fundamentals-of-fluid-flow_fig6.png|thumb|500px|{{figure number|6}}Depletion deterioration of IPR.]]

...ies are encountered, a transition occurs and rate changes begin to reflect depletion of gas or oil in a limited reservoir. Fully developed boundaries result in ...2.png|Figure 2]]). After it begins, radial flow dominates production until depletion occurs.

Reservoir drive mechanisms varied from strong water drive to pure depletion drive. Thick, higher net/gross sandstones (M and M8) exhibited strong water ...ts disconnected from downdip aquifers. Deeper reservoirs also tended to be depletion drive.

...nsate production. Constant Composition Expansion (CCE) and Constant Volume Depletion (CVD) tests. The data obtained from these two tests can aid in determining ===Constant volume depletion (CVD)===

...less than about 5 STB/MMSCF. The OGR should remain constant throughout the depletion of a wet gas reservoir. ...tually contribute the majority of surface oil production at late stages of depletion.

...ve mechanisms and have relatively high recoveries. Solution gas drive is a depletion type drive and is relatively inefficient. ...bination drive reservoir can often be improved by minimizing the effect of depletion drive mechanisms by substituting or augmenting more efficient ones through

...more gas was needed to be reinjected in oil fields in an advanced state of depletion; (3) the technologies of gas liquefaction and pipeline construction have im

...reappearance of soil gas and microbial anomalies in response to reservoir depletion and repressuring.

...ill determine if the decline is abnormal or the result of normal reservoir depletion. If deemed abnormal, it must be determined if the problem is in the reservo ...y be a primary consideration. If the open zone has experienced significant depletion, the circulation of fluids becomes difficult or even impossible. The well k

...ious forms of taxes and tax provisions, such as depreciation and allowable depletion calculations. Such complications—plus the accounting procedures they have

...to gas expanding in solution. This is a solution gas (or dissolved gas or depletion) drive. When pressure drops below the bubble point in the reservoir, small,

...immaturity (odd-even predominance of the ''n''-paraffins), water washing (depletion of light aromatics), leaky reservoir seals (loss of light ends), and source ...cate no production from zone A. The reason for lack of production could be depletion or watering out of a previously productive zone or the presence of a nonpro

...r pressure, lack of understanding of natural fracture systems, hydrocarbon depletion due to migration into other formations, etc.) and engineering factors (wate

...itial reservoir pressures in development wells may indicate zonal pressure depletion. Formation testers are also used to retrieve samples containing fluids.

...To see true depletion, the reservoir would have to be very small. Although depletion is possible in rare cases, identifying it is usually a result of poor test

...n periodic maps of PI during reservoir life indicating trends in reservoir depletion or formation damage. ...ords. For example, in a [[Drive mechanisms and recovery#Solution gas drive|depletion]]-type reservoir, the solution gas to oil ratio is sometimes plotted versus

Four reservoir-depletion mechanisms ([[gravity]] drainage/gas-cap expansion, waterflooding, miscible

...ts the change in the stress state of the reservoir as a result of pressure depletion. ...per/SPE-50977-JPT SPE Paper 50977], v. 51, no. 1, p. 61–63.</ref> Pressure depletion as a result of production will change the stress state of a reservoir (e.g.

...second shut-in period to that from the initial shut-in period may suggest depletion has occurred during the DST. If so, the zone being tested is a limited, non

...rainage area pressure, <math>\bar{p}</math>, for a well with some pressure depletion in its drainage area caused by extended production of fluids. [[:file:press

| colspan = 2 | Depletion

...surface to the reservoir. To a large extent, the successful production and depletion of a reservoir depends upon the successful completion and [[workover]] oper

...to help predict the optimum production rates. However, because of pressure depletion within the oil zone, a pressure differential will eventually develop betwee

...so much gas as oil. The expansion of gas on the reduction of pressure with depletion will cause much of the gas to spill out of the dead ends in fluvial reservo ...meander belt reservoir in the Widuri field in the Java Sea. Following the depletion of a well on the updip side of a 100-m (328-ft)-wide abandoned channel, a s

...city may be limited), the possibility that [[pore pressure|pore-pressure]] depletion has led to pore collapse (which will reduce the potential storage capacity) ...ating fluid pressures that can induce reservoir failure during hydrocarbon depletion]: Society of Petroleum Engineers/International Society for Rock Mechanics (

...l fluid descriptions are used to describe most oil and gas fields. Primary depletion, [[waterflooding]], and gas injection can all be simulated with black oil m

...n interval of water overrun.<ref>Thomas, J. M. D., and R. Bibby, 1991, The depletion of the Rannoch-Etive sand unit in Brent sands reservoirs in the North Sea,

...ndent Producer and Royalty Owner status, therefore eligible for percentage depletion</sup><br>

...servoir may be separating into zones of different pressures as a result of depletion.]] ...e reservoir is separating into zones of different pressures as a result of depletion ([[:file:M91Ch06FG44.JPG|Figure 5]]).

...ation throughout. Isolated channels also occur, but these have shown rapid depletion within 2 months following production start-up.

...ubing Drilling (UBCTD). After years of field production and the subsequent depletion of reservoir pressure, UBCTD has been used to improve production with the f

....slb.com/en/Terms.aspx?LookIn=term%20name&filter=proppant proppant] during depletion.<ref name=pt06r95 /> If present, determine its [[mineralogy]] and predicted

...l2019>Gherabati, A., K. Smye, G. McDaid, and S. Hamlin, 2019, Developing a depletion score to study well spacing and the parent–child effect, in E. Goodman, e ...PI gravity, lower viscosity, higher gas–oil ratios, and, therefore, better depletion drive performance of the Midland Basin and some shallower areas of the Dela

...nhouse gas emissions into the atmosphere and thus global warming and ozone depletion. This is also supported by the pronounced negative &delta;13C excursion rec

...tes that can be developed commercially. The recovery mechanism is pressure depletion of the stimulated rock volume, and the daily production has reached 110 kbb

...ine; but leaching in the lee sides of high-altitude areas has caused acute depletion of the iodine content of soils. This is pronounced in the Kerio District in