An integrated analysis of fracture interference revealed that hydraulic fracture system damage wa... more An integrated analysis of fracture interference revealed that hydraulic fracture system damage was, most likely, due to stimulation fluid flooding, into depleted fracture systems around parent wells, resulting in a reduction in the effective fracture area. The team proposed a number of options to mitigate the impact of fracture interference, including refracturing the existing producing well with an energized fluid.
Estuaries were important sites of deposition throughout most of the Pennsylvanian in the Midconti... more Estuaries were important sites of deposition throughout most of the Pennsylvanian in the Midcontinent. Modern estuaries typically occur within flooded river valleys where marine and fresh waters mix. Characteristic estuarine circulation results in locally high rates of deposition of muddy sediment that can lead to good preservation of fossils. Several Pennsylvanian conservat-Lagerstätten are best interpreted as having formed within ancient estuaries. Three types of estuarine deposits have been identified. Type 1 estuarine systems are large-scale transgressive systems that start with fluvial sands overlying an erosional surface. This is overlain successively by middle-estuarine laminated mudstone, and finally marine mudstone and shale. Well-preserved fossils occur in laminated mudstones and siltstones. This sequence may include within in it type 3 estuarine Lagerstätten. An example is the Douglas Group (Missourian, Kansas).Type 2 estuarine Lagerstätten consist of thin estuarine depos...
An integrated analysis of fracture interference revealed that hydraulic fracture system damage wa... more An integrated analysis of fracture interference revealed that hydraulic fracture system damage was, most likely, due to stimulation fluid flooding, into depleted fracture systems around parent wells, resulting in a reduction in the effective fracture area. The team proposed a number of options to mitigate the impact of fracture interference, including refracturing the existing producing well with an energized fluid.
Estuaries were important sites of deposition throughout most of the Pennsylvanian in the Midconti... more Estuaries were important sites of deposition throughout most of the Pennsylvanian in the Midcontinent. Modern estuaries typically occur within flooded river valleys where marine and fresh waters mix. Characteristic estuarine circulation results in locally high rates of deposition of muddy sediment that can lead to good preservation of fossils. Several Pennsylvanian conservat-Lagerstätten are best interpreted as having formed within ancient estuaries. Three types of estuarine deposits have been identified. Type 1 estuarine systems are large-scale transgressive systems that start with fluvial sands overlying an erosional surface. This is overlain successively by middle-estuarine laminated mudstone, and finally marine mudstone and shale. Well-preserved fossils occur in laminated mudstones and siltstones. This sequence may include within in it type 3 estuarine Lagerstätten. An example is the Douglas Group (Missourian, Kansas).Type 2 estuarine Lagerstätten consist of thin estuarine depos...
Uploads
Papers by Erik Kvale