Topic
Overpressure
About: Overpressure is a research topic. Over the lifetime, 3236 publications have been published within this topic receiving 34648 citations.
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TL;DR: In this paper, the origin of overpressure and its effect on petroleum accumulation in the large Permian/Triassic conglomerate oil province in the Mahu Sag, Junggar Basin have been investigated based on comprehensive analysis of log curve combinations, loading-unloading curves, sonic velocity-density crossplot, and porosity comparison data.
24 citations
TL;DR: In this paper, two basic factors contribute to overpressure in different sedimentary basins of the world, including the South Caspian Basin (SCB): tectonic stress and subsurface temperature.
Abstract: Two basic factors are identified that contribute to overpressure in different sedimentary basins of the world, including the South Caspian Basin (SCB): tectonic stress and subsurface temperature. Two overpressure zones are identified in the SCB: 1. An upper zone (depth interval 600-1200 m), conditioned by disequilibrium rock compaction (undercompaction) and 2. A lower zone (zone of decompaction) conditioned by hydrocarbon generation (depth below 5 km). The lower overpressure zone is the most intense and depends on the thickness of the shale sequence, the content and type of organic matter, and the temperature conditions of kerogen transformation to hydrocarbons. In this zone the greatest risk is associated with gas generation at depths greater than 9 km, due to both more intense thermal breakdown of kerogen and the cracking of liquid hydrocarbons generated earlier. Overpressure is a major cause of diapirism and mud volcanism in SCB.
24 citations
TL;DR: In this paper, large eddy simulations of deflagrating flames are carried out using a dynamic flame wrinkling factor model, validated from a posteriori analysis, is able to capture both laminar and turbulent flame regimes.
24 citations
TL;DR: In this paper, the authors measured the caprock permeability of the Fjerritslev Formation and found that the average vertical permeability is 0.1μD, which is an order of magnitude lower than the standard compressibility of 4.5×10−5−5bar−1.
24 citations