...Introduction Abstract Conventional drilling design tends to inaccurately predict the mud density needed for borehole stability because it assumes that the porous medium is fully saturated with a single fluid while in actuality it may have two or more fluids. This paper provides a new semi...

... with the accurate placement of these boreholes was deemed business critical. Previous mapping efforts did not capture the undulating structural nature of the top of the first sand layer. Since the "sweet spot" of the reservoir was assumed to have a gross thickness of 1 to 2 meters, the application of proactive...

... by independently loading each axis up to about 5000 psi on 8"×8"×8" cubes. Both temperature in boreholes and block surfaces and fluid pressure in boreholes were continuously monitored. Acoustic and pressure-decay measurements are obtained before and at various stages of stimulations. Cubic blocks (8"×8"×8...

... Reservoir Characterization information geologic modeling Artificial Intelligence inverse problem model parameter borehole geological modeling Upstream Oil & Gas facies karst facies matrix facies spatial variability fracture transition probability aquifer transition...

... correction algorithm performs a proper borehole fluids correction. Figure 4 , from Plasek, et al., 1995 , shows the range that the Schlumberger RST PNC tool can properly compensate for borehole fluids. These experiments were done with BSALs ranging from zero to 210 ppk. The experiment shows...

... of appropriate modeling tools, a much clearer insight into the rocks surrounding the wellbore can be gained. The fundamental petrophysical characteristics and geometries of the rocks can be evaluated, and the boundaries surrounding the borehole can be understood. This paper describes the fundamental physics...

... Abstract A new logging while drilling (LWD) device acquires laterolog resistivity logs and borehole images in 6-in. holes drilled with con-ductive mud. On a single drill collar, the tool combines a standard laterolog azimuthal measurement with a new, high-resolution imaging capability. The tool...

... depletion vertical well sand production critical collapse pressure society of petroleum engineers wellbore pressure borehole compaction model horizontal well cohesive strength reservoir geomechanics collapse pressure horizontal stress in-situ stress pressure gradient equation Borehole...

... rotated in the borehole as shown in Figure 1b , one can observe that the same sensors will no longer be at the same distance from the nearby wall. If this distance is significant enough to cause a moderate to large phase delay in the arrival of the desired signal, then it is beneficial to keep...

... fractured reservoirs. asset and portfolio management integrated asset modeling US government Artificial Intelligence complex reservoir reservoir simulation Fluid Dynamics calibration bodvarsson flow in porous media Upstream Oil & Gas infiltration scenario borehole unsaturated zone...

... Abstract Seismic While Drilling (SWD) specifically encompasses the seismic techniques operated while the drillstring is lowered in the borehole, during effective drilling, during maneuvers or while connecting drill pipes. This paper provides a State of the Art review on both old and newer SWD...

.... Examples are presented to show reservoir monitoring results obtained in a variety of formation lithologies, formation fluids, and borehole environments to illustrate the robustness of the technique. These cases include detailed analytic studies between the PNC tools. The results indicate that the new sigma...

... overburden natural gas storage injection leak underground gas storage overburden stress test reservoir geomechanics borehole wall situ stress measurement propagation pressure value flow control packer fracture propagation spe 94253 borehole gradient calculation Geological Description...

... transport in the formation. The model calibration is achieved by fitting the predicted temperature at some intermediate distance from the borehole for the temperature data measured in flowline during pumping-out. The temperature found in intermediate zone is then extrapolated to the boundary of cooled zone...

... azimuthal density spe 65113 application log analysis drilling image formation dip reservoir characterization well 21 density image horizontal well density measurement borehole well 7 structural geology variation directional drilling drilling data acquisition image lwd production...

... closure pressure proppant slug reduction hydraulic fracturing hydraulic fracture stimulation proppant concentration fracture treatment displacement fracturing materials gas well fracture stimulation upstream oil & gas fracture stimulation reservoir borehole concentration fracturing...

... detection borehole acquisition reservoir characterization receiver test result bed boundary receiver element information upstream oil & gas boundary well logging dynamic range field test result processing method nakken spe 50593 visualization reflection waveform propagation log...

... designs more diameter efficient. Ideally we would like to drill wells with one hole size from top to bottom and line them with one size of casing. Alternative Borehole Linings (ABLs) are one step towards helping us to achieve this goal. The ABL system reported in this paper was developed to replace...

... and azimuth uncertainties, failure to include random errors as well as systematic, and the inability to assign a probability to borehole position. A modified treatment of uncertainty which overcomes these limitations is described here. Although several of these improvements have been used for many years...

... with traditional methods. Field results from southern Italy are reported. Introduction Early need for an automated guiding device for straight vertical boreholes occurred in the mining industry during the late 70's. Up to then the state-of-the-art had been to operate passive devices to maintain the direction...