The thick Upper Cambrian Xixiangchi dolostones, developed in the Sichuan Basin, are an important deep exploration target, but their genesis is still controversial, which hinders predicting porous dolomite distribution and related potential hydrocarbon play. Herein, based on observation sampling of field outcrops, combined with a microscopic thin section analysis, cathodoluminescence geochemical...

This study is achieved in the local area of Eridu oil field, where Mishrif Formation considered main productive reservoir. The was deposited during Cretaceous period secondary sedimentary cycle (Cenomanian-Early Turonian as a part Wasia Group, carbonate succession widespread throughout Arabian Plate. already have been evaluated terms depositional environments and their diagenetic processes. Her...

The Utica/Point Pleasant Formations comprise a major unconventional gas resource in the Appalachian Basin. Core samples from several boreholes Ohio, West Virginia and Pennsylvania were studied to determine mineralogy, microtexture/microfabric, accessible pore surface area, porosity size distribution as function of maturity sub-basin. This effort compares shallower, generally more phyllosilicate...

The Ca, Mg, O, and C isotopic and trace elemental compositions of marine limestones and dolostones from ODP Site 1196A, which range in depth ( 58 to 627 mbsf) and in depositional age ( 5 and 23 Ma), are presented. The objectives of the study are to explore the potential for non-traditional isotope systems to fingerprint diagenesis, to quantify the extent to which geochemical proxies are altered...

Shale diagenesis differs from that of sandstone and carbonate rocks with regard to the type, evolution stage, mode. The quality shale reservoirs is closely linked extent diagenetic evolution. This study identifies types characteristics using thin sections scanning electron microscopy (SEM) observations. stages are determined by analyzing organic matter clay mineral transformation establishing a...

Abstract The process of recrystallization affecting dolomitic successions remains a longstanding enigma in carbonate research. Recrystallization influences the accuracy genetic dolomitization models as well prediction porosity and permeability distribution within reservoirs. We investigate early-formed dolomites Upper Jurassic Arab Formation reservoir (Arabian Platform, United Emirates), where ...

The microbial dolomite model has been used to interpret the origin of sedimentary dolomite. In this model, formation low-temperature protodolomite, an important precursor dolomite, can be facilitated either by actively metabolizing cells anaerobic microbes and aerobic halophilic archaea or their inactive biomass. Aerobic bacteria are widely distributed in (proto-)dolomite-depositing evaporitic ...

The porosity and permeability of the rock surrounding lead–zinc deposits are key factors for controlling migration precipitation ore-forming hydrothermal fluid. In this paper, Huize super-large deposit was taken as case study, variations in wall rocks their relationship with orebody were analyzed by using CT scanning technology. experimental results showed that average pore radius dolomite a de...