... where ε L and P L are the Langmuir type matrix swelling shrinkage constants. ε L is the Langmuir strain at infinite pore pressure and P L is the pore pressure when the volumetric strain is equal to 0.5 ε L . Gas flow in matrix and fractures Abstract Horizontal boreholes have...

... horizontal stress acoustically stress wellbore upstream oil & gas shear slowness inversion mechanical earth model reservoir geomechanics dispersion plot dispersion curve slowness caliper reservoir characterization borehole shear radial variation profile anisotropy maximum horizontal...

... gas propagation tool borehole objective bulk density drilling data acquisition logging while drilling lwd memory data engineer photoelectric factor formation evaluation measurement completion decision invasion real-time data coal thickness australia Introduction Coal-seam gas...

... type characterization. The azimuthal resistivity tool has a deep azimuthal resistivity measurement that can identify nearby bed boundaries, up to 5 m from the borehole, while drilling. This information is available in real-time to the operator for decisions while drilling. The combination of the two...

... more accurately. We therefore developed a new set of closed-form solutions for poro-elastoplasticity with strain softening behaviour to predict stress-strain distributions around the borehole. A set of hollow cylinder experiments was then conducted under different compression scenarios and 3D X-Ray...

... different materials. The presented computational method is developed accounting for different casing and cement thicknesses, and sensor positions within the borehole. The reduced order model construction could be considered one level up from the regular Monte Carlo modelling procedure as it reduces...

... (GP) logging is a technique traditionally used to evaluate the quality of the gravel distribution in a gravel pack. The measurement is sensitive to silicon around the borehole, hence a technique was adapted to detect sand blockage in the wellbore by logging the pulsed neutron tool inside the tubing...

... horizontal well. This device was of great benefit in both validating the accuracy of the seismic interpretation and tying the borehole acquisition data to the seismic data. One of the greatest challenges in geosteering is that horizontal wells are planned using a seismic visualization of the reservoir...

... Abstract The measurement of actual wellbore shape in real-time can be considered as one of the key components to detect problems such as borehole instability. Abnormal wellbore shape will allow drawing conclusions on the stress field and the impact on other sensors' responses as part of LWD...

...-existing plane argillaceous formation logging while drilling borehole drilling measurement spe 124012 wellbore Introduction Of the previous calculations, Eaton's method is generally the most widely used and can be applied to several sources of data, e.g., drilling exponent (dxc), resistivity...

... study from the region is used to illustrate the workflow. Image log interpretation, advanced acoustic measurements, nuclear logs and production logs with distributed local sensors are combined with well test data to derive the best possible evaluation of the fracture network around the borehole...

... interbedded by mudstones. A comprehensive borehole logging program was performed consisting of routine well logging to which an enhanced logging program was added for one well that record nuclear magnetic resonance and borehole resistivity images predominantly to better characterize the storage formation...

... are essential. Currently, these are either nonexistent or infrequent. well logging sensitivity Upstream Oil & Gas borehole detector log analysis completion Indonesia steam saturation saturation reservoir neutron zalán Steam flood gas saturation dynamic range Badruzzaman matrix...

... Abstract Underbalanced drilling (UBD) has been widely used as a means of reducing formation damage during drilling. The benefit of reduced formation damage results from the fact that the borehole pressure is intentionally maintained to be lower than formation pore pressure during drilling...

... is sensitive to the effect of completion items and borehole fluids. The CO response to formation rock and fluids is well characterized in single casing conditions, but logging within single and dual tubing is more complex, because of the extra tool to formation stand-off and the increased effect of borehole...

... proven valuable input to the reservoir model. belida field saturation fluid contact borehole caliper reservoir model verification well logging upstream oil & gas blast joint indonesia simulation gamma ray cement evaluation log reservoir simulation lower arang carbon oxygen...

... selection wellbore integrity wellbore design measurement while drilling drillstring design borehole mwd snr logging while drilling lwd receiver petroleum engineer bit design lat transmitter 1 data rate acoustic telemetry system bit selection telemetry information Introduction...

... Abstract This work presents the analysis of a borehole instability case at 2km in a seal formation within the oil field environment. Field observations of severe borehole instabilities are given. The factors causing this instability are observed as being due to cyclic mud pressure loading...

... Abstract Implemented into RFPA 2D (Rock Failure Process Analysis), a coupled flow-stress-damage (FSD) model is presented to evaluate borehole failure with impact of mud permeation at multi-lateral junction. Specifically, the FSD model that incorporates the small-scale variability in both...

.... From the two detectors of the tools, carbon to oxygen ratios are generated for both the near and far spacings. These ratios can be used to give borehole holdup and formation water saturations. The transform from ratios depends on an extensive database of common lithologies, porosities, casing geometry...