... Abstract During hydraulic fracturing of low to moderate (0.1 – 50 md) permeability reservoirs using crosslinked gel fluids, the final proppant stage displacement is designed to leave some volume of proppant slurry above the perforated interval. This practice of underflushing is based...

... reservoirs close to the perforated interval. Results/Objectives/Conclusions Results from the analyses of four oil wells in the Big Horn Basin of Wyoming are presented. All four wells have excellent log suites allowing for reliable petrophysical analysis, are now depleted, and have rate-time data...

.... production monitoring upstream oil & gas information production control production logging flow rate reservoir surveillance perforated interval acquisition interval acquisition period acoustic activity fiber artificial intelligence surface rate active cluster active perforation wireline...

...⅝" casings and larger), and rate restrictions (limited to 4,500 BPD injection rate, beyond which shroud erosion is expected). Cone Control technology, is to create a pressure drawdown (ΔP), just below the OWC marginally more than the ΔP across the perforated interval within the Oil leg. This drawdown retards...

... distortion of the perforated casing is concentrated around the perforation holes at the ends of the perforated intervals. Allowing for a critical strain of 6% in the casing, the depletion limit would have to be reduced from 3500 psi to 2600 psi if the second set of perforations could be applied uniformly...

.../ emulsified acid in stages with chemical diverter (gel based and visco-elastic surfactant based). Post stimulation PLT survey in these wells indicated, that only about 5-10% of the total perforated interval contributed to the production; concluding that the diverters were found to be ineffective leading...

... is proving to be an effective tool in understanding the behavior of complex carbonate reservoirs. upstream oil & gas perforated interval flow capacity evaluation flow in porous media pressure transient analysis porosity well logging flow profile stimulation effectiveness log analysis...

... perforated intervals, insufficient velocities below the packer can cause liquid loading. Many traditional artificial lift methods are limited in their ability to address liquid loading issues in these types of wells. Solution: If gas can be injected below the packer and deep into the perforated zones, gas...

... in completing this very thick interval. Perforation intervals had to be placed to avoid a fault (and thus a potential early screenout), avoid a water contact, comply with tool spacing limitations and still maximize contact with net pay. This paper addresses the approach taken to develop a fracture stimulation...

... separating petrofacies 1. This confirms that petrofacies 1 which is the best reservoir rock in a petrophysical sense is also a better gas producer. upstream oil & gas toc rock type porosity perforated interval petrofacies 2 reservoir characterization barnett shale lithofacies petrofacies 1...

...: Collected and reviewed preliminary investigation results about zonal isolation methods. Evaluated different methods for zonal isolation to achieve diversion with limited perforated intervals. Provided guidelines for matrix or fracturing stimulation: Decision making methodology (i.e. decision tree...

... readout pressure gauge with downhole shutin. This technique has recently been employed on over 60 zones in the last two years in the Hugoton field in Kansas with excellent results. The fourth challenge is selectively isolating individual perforated intervals for the refracture treatments. The most...

... temperature increase main flow period cleanup period joule-thomson expansion drillstem/well testing drawdown coefficient compression production logging perforated interval nonisothermal behavior field case temperature profile fluid expansion rate change buildup expansion equation...

... this condition the use of induced hot/cold thermal tracers together with temperature modeling has been introduced, allowing the calculation of fluid rate distribution along the perforated intervals. Where the fiber is cemented behind casing, well defined patterns, based on the temperature value, can...

... is the depth from top perforation where pressure in well and pressure in aquifer are equal. If the total perforation interval H is less than Z , all the perforations are active initially. Let us divide the total perforation interval H into intervals of small thickness Δ z . The flow in each small...

.... hydraulic fracturing Upstream Oil & Gas perforated interval viscosity terrell county fracture natural fracture hydrochloric acid Symposium wellbore carbonate reservoir acid system strawn formation Schlumberger penetration SDVA stimulation acid diversion reservoir permeability flow...

... that the matching relationship between intercalations and perforated intervals is the main factor that influences remaining oil distribution of a sand body. This provides a new way to find remaining oil in a mature oil field. Upstream Oil & Gas geological modeling perforated interval Reservoir...

... acreage. Key completion parameters were identified that can be used to optimize future Barnett completions in this and potentially other areas within the basin. perforated interval isolation Efficiency recovery interwell communication gamma ray image perforated interval completion frac grad...

... for a conventional production logging test (PLT). Reservoir Surveillance production control Upstream Oil & Gas perforated interval horizontal section real time system production logging liquid level production monitoring temperature survey information fiber water cut real-time temperature...

..., and recommendations for implementing the treatment process. One major advantage of this remedial treatment method is the ability to place the treatment fluid into the propped fractures, regardless of the number of perforation intervals and their lengths without mechanical isolation between the intervals. The fluid...