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...2, Mechanical properties of Japanese Tertiary sedimentary rocks under high confining pressures: Geological Survey of Japan Report 244, 200 p.</ref>]] ...r 68 shales. The ductility of the shales was measured in the laboratory at confining pressures of 1, 200, and 500 kg/cm². All samples were [[Deformat

| Confining pressure || Increasing confining pressure increases ductility. | Pore pressure || Increasing pore pressure decreases ductility.

...an underlying petroleum column) exceeds the seal capillary [[displacement pressure]]. This type of seal does not [[fracture]] during [[deformation]]. ==Ductility and capillary displacement pressure==

...erlying [[Hydrocarbon column|petroleum column]] exceeds the [[displacement pressure]] of the fracture [[porosity]] in the seal. ...t geological [[Wikipedia:Deformation_(mechanics)#Strain|strain]] rates and confining pressures.

| chapter = Formation fluid pressure and its application Fluid pressure equals ρgH. Under hydrostatic conditions, the buoyant force equals

...ining pressure increases and thus the P_f increases. As fracture pressure increases, the depth of the first [[intact top seal]] increases. ...is required to relate the distribution of hydrocarbons to actual fracture pressure rather than simply depth below top of overpressure.

...oss of top seal integrity can occur by increasing pore pressure. High pore pressure can overcome the normal stresses that keep fractures closed. Similar fractu High pore pressure has fractured the top seal and lost hydrocarbons in several basins, includi

...ghtly, displacing the oil or gas from the reservoir toward the borehole as pressure drops around the borehole. This mechanism exists only where the aquifer is ...fluid pressure drop in the reservoir and supports hydrocarbon production. Pressure drops in proportion to the volume of hydrocarbon removed from the reservoir

...is applied. This definition unfortunately contains nonconsistent units, as pressure is expressed in atmospheres rather than in fundamental units. Lowman et al. ===Confining pressure===

...ontrolled conditions of pressure, temperature, strain rate, and pore fluid pressure and chemistry. The starting configuration of these models is usually a righ ...vironmental parameters during deformation (e.g., rock strength, overburden pressure, temperature, strain rate).

...(1) laboratory data on seal properties and (2) estimates of the confining pressure and [[seal ductility]] at the time of trap formation.

...s, thin section petrography, scanning electron microscopy, and [[capillary pressure]] tests. These analyses indicate that significant differences exist between ...known pressure is then expanded into the pore volume. The new equilibrium pressure in the system is monitored, and the pore volume is calculated from Boyle's

...d into the target formation at a rate sufficient to fracture the well, the pressure at the formation face builds up rapidly to the point that the formation fai ...appropriate stimulation candidate, in other words, its remaining reservoir pressure, reserves, and other considerations. In some formations, where the hydrocar

...petrographic framework of shales, as well as their behavior under various pressure and temperature regimes and the manner in how fluids move thorough these st ...ithout sediments. Triggers might be the gradual buildup of pressure beyond confining stresses of the overburden, sudden mass failure downslope of the overburden

[[file:subsurface-maps_fig3.png|thumb|300px|{{figure number|3}}Map of pressure response to pattern flood, Judy Creek field, western Canada, 1974 and 1975. ===Pressure===

...eflections correlate with condensed-section claystones and often bracket [[pressure compartments]] due to their very low [[permeability]]. Between the condense ...ownslope may be confined to narrow valleys or spread outward into the less-confining minibasin of the [[Gulf of Mexico]] slope.<ref name=ch04r53 /><ref name=ch0

...ays optimistic, particularly at low permeability. Correction for slip, net confining [[Wikipedia:Stress (mechanics)|stress]], and any rock-fluid interaction (sh * [[Capillary pressure]]

...After years of field production and the subsequent depletion of reservoir pressure, UBCTD has been used to improve production with the following benefits (see * Ability to access low pressure reservoirs and prevention of differential sticking