The Neogene Guantao Formation Reservoir in the PLOilfield is a unconsolidated sandstone with high porosity and permeability. reservoir diagenesis weak dominated by compaction diagenesis. At present, insufficient research into relationship between pore characteristics sedimentary microfacies of shallow delta reservoirs restricts prediction favorable distribution. This article takes as object ana...

The Nahr Umr Formation is considered one of the main reservoirs produced in southern Iraq. It important siliciclastic deposits Cretaceous sequence Iraq oilfields. Zubair oil fields ZB-190 and ZB-047 were chosen to study areas. This depends on available core cutting samples determine facies analysis, depositional environments, petrographic characteristics diagenesis processes. Based description ...

Abst rac t -Oxygen isotopic compositions were determined for coexisting mixed-layer serpentine-chlorite (Sp-Ch) and illite-smectite (I-S) from 5 Tuscaloosa Formation sandstone cores sampled between 1937 and 5470 m burial depth. High gradient magnetic separation (HGMS) was used to concentrate Sp-Ch and I-S from the <0.5 p~m fraction of each core sample into fractions with a range in the Sp-Ch : ...

The sandstone reservoirs in the Upper Paleozoic He 8 Member northern Tianhuan depression of Ordos Basin are vastly different and feature particularly complex gas–water distributions. Scanning electron microscopy, fluorescence, Raman spectroscopy inclusions, relative permeability analysis, nuclear magnetic resonance were utilized this study based on core data, identification statistics, various ...

7.03.3 SOURCES AND DIAGENESIS OF SHOAL-WATER CARBONATE-RICH SEDIMENTS 75 7.03.3.1 Sources of Shoal-water Carbonates 75 7.03.3.1.1 General considerations 75 7.03.3.1.2 Sources of carbonate muds 76 7.03.3.1.3 Formation of carbonate sands 76 7.03.3.2 Early Marine Diagenesis of Shoal-water Carbonate-rich Sediments 77 7.03.3.2.1 Pore-water chemistry 77 7.03.3.2.2 Precipitation of early carbonate cem...

In addition, one of the following statements should be included. Abstract The Piceance Basin, CO is a type locale for unconventional tight-gas sandstone in the Rocky Mountains (Law, 2002). Productive Williams Fork sandstones are extremely heterogeneous fluvial to marginal marine reservoirs that have very low permeability (<0.1 md) that typically require expensive hydraulic fracturing with 10-20...