A pilot study of 13 wells in Means oil field of the Permian basin, West Texas, established porosity-permeability relationships for the Permian Queen, Grayburg and San Andres formations. The optimized workflow used borehole image and conventional log processing with calibration to core data. This approach allowed the quantification of porosity and perme-ability heterogeneity in vuggy carbonate f...

The quality of any reservoir is strongly controlled by diagenetic processes, especially those that are comprised mixed siliciclastic-carbonate sequences. An Eocene sequence forms reservoirs with diverse in the Hungarian Palaeogene Basin, which found within Pannonian Basin. Late transgression established extensive shallow-marine depositional environments controlling early processes. Drill cores ...

In tropical and sub-tropical mixed siliciclastic–carbonate depositional systems, fluvial input in situ neritic carbonate interact over space time. Despite being the subject of many studies, controls on partitioning sediments remains controversial. Mixed sedimentary records, from Ashmore Trough shelf edge slopes (southern Gulf Papua), are coupled with global sea-level curves anchored to Marine I...

Morrowan-age units in the Permian Basin appear to show a “second-order” transgression from siliciclastic fluvial-deltaic to shallow-marine and subsequently to carbonate deposition. In general, Morrowan-age siliciclastics dominate deposition in the west of the Permian Basin, while carbonate deposition dominates in the east. The predominance of carbonate facies in the east is due to a lack of sil...

Mixed carbonate–siliciclastic deposits provide unique insights into hydrodynamic processes that control sedimentation in tidal systems. This study presents sedimentological and ichnological data from the upper Miocene to lower Pliocene Bouse Formation, which accumulated during regional transgression at margin of a strait near north end ancestral Gulf California. The basal carbonate member Forma...

Abstract The Kimmeridgian Alcobaça Formation of the Lusitanian Basin forms a mixed carbonate–siliciclastic unit between basinal deposits Abadia Formation, and fluvial–terrestrial strata Lourinhã Formation. This study presents >2.5 km detailed logs nine outcrop sections in its type region. Eight these encircle Caldas da Rainha Diapir, which was prominent, emergent, passive salt diapir during ...

Many world class large carbonate reservoirs leave behind at least half of the initial oil in place. Typically water injection is used to improve oil recovery while gas injection is used to maintain pressure or to promote oil gravity drainage. Immiscible gas injection, including injection of CO2, has been considered but not implemented on a large scale for economic reasons. Furthermore, interest...