... for these problems.) The intermediate problems (Categories B and C, Problems 4-10) are caused by linear-flow features (e.g., fractures, fracture-like structures, narrow channels behind pipe, or vug pathways). Certainly, much work remains to optimize the treatment of these problem types. However, substantial...

... San Andres Platform Carbonate reservoirs are highly heterogeneous because of the depositional facies, diagenesis, and fracturing. Ref. 2 described how grainstone bar depositional facies significantly affected the production character in Dune (Grayburg) reservoirs. Ref. 3 described how areas...

... Abstract The primary goal of this study was to couple reservoir characterization of the Abo Formation with hydraulic fracture analysis and subsequently, to infer infill drilling potential. Two detailed case studies were investigated to reevaluate original hydraulic fracture treatment designs...

... with "chicken wire" patterns, or a diagonal line drive in which producers and injectors line up along the WNW to ESE fracture trend. This development has led to many injectors communicating directly to the offset producers, which became even more evident when CO 2 operations began in late 1984. Because of poor...

... Abstract Hydraulic fracturing has generally been limited to relatively low-permeability reservoirs. In recent years, the use of hydraulic fracturing has expanded significantly to high permeability reservoirs. The objectives of fracturing low permeability reservoirs and high permeability...

... texas waterflood waterflooding identification upstream oil & gas adisoemarta frailey enhanced recovery society of petroleum engineers conformance fracture waterflood Introduction A Theoretical and Laboratory Observations of Detriments to Waterflooding A tremendous effort has...

... formation at approximately 3,700 ft (1,128 m). The excessive vertical extent of the formations encountered requires a determination be made that best divides the intervals in preparation for a two-stage fracture treatment. A limited entry perforating technique is implemented with 0.40 in (1.02 cm) diameter...

... Abstract A new hydraulic fracture screening method has been developed based on quantitative analysis of the mobile oil saturation in the target zone. The traditional selection process was based on analysis of low productivity wells, followed by extensive fracture modeling of leak-off parameters...

... Abstract Recent research on naturally fractured reservoirs suggests that microfractures and megafractures are all part of a single population that shows a power-law relation between frequency of occurrence and fracture aperture or length. The objective of this work is to investigate...

... Table 1 Surface tiltmeter fracture mapping results for NRU 1514 Stage Slurry Volume (BBL) Mid. Perf Interval Fracture Azimuth Fracture Dip S1 675 7090 N 79° E ± 5° 89° S ± 3° S2 611 6835 N 80° E ± 6° 83° S ± 3° S3 700 6283 N 75° E ± 4° 86° S ± 3...

... the imaging of the water flood fairly straightforward. In this paper we provide a technology overview and then show a case history where the EM resistivity images have defined the initial water saturation distribution, and have tracked changes over a two year period due to water flooding in a fracture...

... to 5399.0 ft and from 5455.0 ft to 5587.0 ft. Every segment of the core was examined and segments with clear fracture traces on the top or bottom were measured to obtain strike angles. Examination of the core reveals a dolomite composition, with zones of fractures that are partially to completely filled...

... Abstract The presence of natural fractures in hydraulic fracturing candidates can present an array of well completion problems. Natural fractures can be very difficult if not impossible to model without adequate pre-job diagnostic testing to calibrate simulation. Left undetected natural...

... technique in which decline characteristics were tied to reservoir parameters such as effective permeability and fracture half-length. The effective permeability ranged from 0.17 to 0.9 mD, while the fracture half-length varied from 600 to 1300 ft. Peak production rates ranged from 20 to 90 BOPD. Comparitive...

... By definition, creating a hydraulic fracture involves parting the rock and displacing the fracture faces to create fracture width. The principle of tiltmeter fracture mapping is simply to infer hydraulic fracture geometry by measuring this fracture-induced rock deformation. The induced...

... Abstract Although fracturing is an established technology with a wide range of usage, certain reservoir scenarios that appear to be good candidates for its application do not benefit from its usage. Examples of these reservoirs include stratified wells in which some of the layers are water...

... Abstract The success of an acid fracturing treatment is determined by two characteristics of the fracture formed by the acid reaction: length of the conductive fracture and conductivity of the fracture. The distance that reactive acid moves along a fracture is controlled by the competition...

.../falloff testing of coalbed methane and other low permeability reservoirs. Using several field-based examples, potential analysis pitfalls are highlighted including 1) injection above fracture pressure, 2) non-stable reservoir pressure prior to testing, and 3) a poor connection between the wellbore...

... Abstract The Green River formation in the Utah Basin of eastern Utah is a series of low-permeability sands containing a viscous crude oil. Primary stimulation techniques involve the pumping of hydraulic fracture treatments. Usually several treatments are pumped per wellbore because, the sands...

... Abstract Fluid clean-up effects have hampered stimulation success in many tight, naturally fractured sandstone reservoirs. The petrophysical responses of treatment fluid invasion can affect short-term and in some cases long-term reservoir deliverability. Many times reservoirs...