... approximations. Geomechanical inputs from the Barnett Shale are considered for a horizontal well aligned parallel to the direction of the least compressive horizontal principal stress. The corrected numerically derived expressions can predict initiation pressures for a specific orientation of fracture initiation...

...R.. Kumar; J.. Mahadevan Summary Inflow performance in some heavy-oil reservoirs is not well understood because the fluid properties differ from conventional behavior. In this work, we develop an expression for inflow performance as a function of properties of foamy oils (e.g., density, viscosity...

... coefficient expression buildup annular-pressure buildup wellbore annular pressure APB expansion The mass of fluid trapped in an enclosed annulus can experience significant pressure increase owing to thermal expansion when it receives heat from the producing fluids in the tubing string. We can...

... Drillstem Testing Reservoir Surveillance Upstream Oil & Gas fluid temperature temperature measurement calculation drillstem/well testing temperature model residual function flowmeter derivative university single-point approach spe annual technical conference expression entire-wellbore...

... Hasan wellbore thermal property flowing-fluid temperature pressure gradient gradient production control Upstream Oil & Gas calculation Wellhead heat transfer drilling operation equation of state wellbore design drillstem testing pvt measurement expression robust steady-state model...

... by comparing computational results to the experimental data and mechanistic models. Small gas bubbles in liquid slugs should be accounted for when predicting liquid holdup for slug flow more accurately. Gas in the slug body is considered by adding a proper term to the void-fraction expression. This term...

... horizontal or fractured wells, and (3) against benchmarks that push the limits of technology. It took 25 years to make two simple observations: (1) Cinco's S f +ln ( x f / r w ) can be introduced into the expression for J D by the trivial addition and subtraction of ln x f (e.g., Eq. 3...

...S. J. Sawaryn Summary This paper contains analytical expressions illustrating the growth, renewal, and decline of single electrical-submersible-pump (ESP) populations and their transition to dual-ESP systems. Critical assumptions are justified with published data, and the commercial implications...

..., expressed as a function of time, is called the survivor function. Parametric models of the survivor function can be obtained with little data and are useful predictive tools. Semiparametric and nonparametric methods are also available 6 and, with sufficient data, are commonly used in reliability analysis...

... recovery formation damage coefficient filtration coefficient injection upstream oil & gas expression pressure drop concentration coefficient solid particle waterflooding particle formation damage equation water management correspond flow in porous media may 2003 fluid dynamics...

... hag cho teng aziz prediction equation churn flow august 2001 expression For bubbly flow, Taitel et al . 2 presented a minimum-pipe-diameter expression as the existence criterion. This criterion is based on the comparison between rise velocity of elongated bubbles and small bubbles...

... rate law upstream oil & gas expression calculation precipitation fluid modeling structural geology gdanski reservoir characterization preflush acidizing equation of state kaolinite hsif 5 artificial intelligence tertiary reaction secondary reaction Fundamental research...

.... For flow in both vertical and deviated pipes, we were able to develop a single expression for the drift flux, u ow , resulting in a single equation for the in-situ oil fraction, f o , for the three flow regimes studied. We correlated f o with the oil superficial velocity, v os , and the terminal rise...

... measurements. The predicted micellar size increases with dilution ratio. This prediction is also in agreement with measured data. 14 7 1997 6 2 1998 17 2 1998 1 5 1998 1 5 1998 Copyright 1998, Society of Petroleum Engineers Δ G m 00 can be expressed...

... of state precipitation cubic equation pedersen upstream oil & gas crude oil remediation of hydrates atmospheric pressure mole fraction expression cloud computing spe production & facility procedure carbon number fraction Formation of solid phases is highly unwanted in oil wells...

... by differentiating Hooke's law with respect to time followed by the appropriate substitution of the definition of rod velocity and rod tensional force. The resultant expression is: (2) ∂ F ∂ t = − E t A r ∂ v r ∂ x + F A r ∂ A r ∂ t where...

... parameters of the oil and the asphaltene and by their molar volumes. The solubility S of asphaltenes in oil can be expressed by: (1) S = exp { − 1 + v a [ 1 v o − ( δ a − δ o ) 2 R T ] } * C . For an explanation of the symbols, see...

... temperature and that the fluid temperature gradient is nonlinear. This study further shows that increased free gas lowers the wellhead temperature as a result of the Joule-Thompson effect. In such cases, the expression for fluid temperature developed earlier for single-phase flow should not be applied when...

... pipeline reservoir surveillance spe production gas flow rate calculation gas well pvt measurement expression drillstem testing psia spe production & facility inlet pressure equation midstream oil & gas The problem of compressible fluid flow through pipelines and conduits has...

... permeabilities on well performance are studied. Exact expressions of post-treatment skin effects are developed for vertical and horizontal wells. 26 2 1992 9 9 1993 3 12 1993 1 2 1994 1 2 1994 Copyright 1994, Society of Petroleum Engineers stimulation fluid spe production...