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diagenetic development of kaolinite

Diagenetic History and Reservoir Quality of A Brent Sand Sequence

The diagenetic histories of both formations are thus discussed together, and can be divided broadly into four successive stages: 1. Soil processes and other results of very shallow burial. 2. Loss of porosity, due primarily to progressive silica cementation during burial. f Diagenetie effects on Brent reservoirs 383 3.

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CiteSeerX — Diagenetic development of kaolinite

It is concluded that silicification of hydrated aluminum oxides was an important mechanism of kaolinite formation in ancient sediments and that free alumina com-pounds persist only as a result of the unusual volume xpansion associated with kaolinite formation. Keyphrases diagenetic development kaolinite formation

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Characterizing the Mineral Assemblages of Hot Spring Environments and ...

Specifically, kaolinite is found only in the four opal-CT samples from TK and the three opal-A/CT samples from SI that show incipient conversion of opal-A to opal-CT, and it is not present in samples with only opal-A. This association of kaolinite with opal-CT may indicate acceleration of diagenesis by acidic alteration events (Lynne et al., 2007).

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The Principle of Diagenetic Facies and Some of Its Implications

Each diagenetic facies can be defined as including all rocks or sedimentary detritus which have, by a process of diagenesis, developed mineral assemblages that are the result of adjustment to a particular diagenetic environment. ... However, kaolinite will become important as pH decreases. Details; Figures; References; Cited by; The Journal of ...

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Diagenesis and Origination of Carbonate Cements in Deeply ... - Hindawi

sandstones have undergone two diagenetic episodes of eogenesis and mesogenesis. Events observed during eogenesis include chemical compaction, leaching of feldspar, development of chlorite coating and kaolinite, precipitation of the first generation of quartz overgrowth (QogI), dissolution of feldspar, and precipitation of calcite and ...

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Diagenetic Development of Kaolinite

DIAGENETIC DEVELOPMENT OF KAOLINITE C. D. CURTIS* and D. A. SPEARS Department of Geology, The University, Sheffield S 1 3JD, England (Received 11 August 1970) Abstract--Experimental solubility data...

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Computerized geochemical modeling of burial diagenesis of the Eocene ...

The detailed petrographic analysis and petrological interpretation of the reservoir (both are beyond the scope of this present article) suggest a diagenetic history divided into 4 stages: (1) The marine eodiagenesis, (2) The meteoric eodiagenesis, (3) The compactional mesodiagenesis, and (4) The thermobaric mesodiagenesis.

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Kaolinite transformation into dickite during burial diagenesis

These results are interpreted as resulting from a double reaction taking place in the solid state with burial. Some kaolinite domains grow in size and crystal order while other domains are transformed into dickite. Presumably, also the dickite domains formed early in the transformation grow in crystal order.

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Critical Diagenetic Features Controlling Intergranular Flow Paths and ...

All observations indicate that the minute quartz overgrowths, and the high authigenic rugosity they created along grain boundaries, were a key diagenetic event in creating the most efficient drainage networks that now facilitate the movement of hydrocarbons at the core-plug scale. CU Boulder Authors Budd, David A publication date April 1, 2020

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Depositional, diagenetic and mineralogical controls on porosity ...

Depositional, diagenetic and mineralogical controls on porosity development in the Ungani Field, Canning Basin ... reservoir development largely proved elusive, perhaps unsurprising given that carbonates are considered notoriously heterogenous ... Carbonate, hydrocarbon, kaolinite, dickite, silica, hydrous silica (silica with interstitial water ...

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Diagenetic mineral development within the Upper Jurassic Haynesville ...

The diagenetic development of the Haynesville-Bossier Shale can be divided into early and late diagenesis. Ferroan and non-ferroan dolomite, framboidal pyrite and bioclast pore-filling kaolinite and calcite grain replacements and cements all formed during early diagenesis.

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Predicting Diagenetic Facies in a Tight Sandstone Reservoir Using ...

Microscopic characteristics of each diagenetic facies. a. Primary chlorite coating cementation, well-preserved primary pores, and locally formed by dissolution of feldspar and debris, Kaolinite and calcium sandstone, high matrix content, locally developed calcareous cementation, feldspar; M = matrix; Ca = calcite cement; K = kaolinite; and P ...

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A molecular dynamics study on the structural and mechanical properties ...

During the relaxation process, the equilibrium dynamic trajectory was recorded, the volume, lattice constants, and total energy of kaolinite and hydrated kaolinite systems were obtained. Finally, three uniaxial tension tests were carried out on an equilibration configuration by continuously increasing deformation along OA, OB, and OC directions.

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Regional‐scale development of opening‐mode calcite veins due to silica ...

The present study highlights the capability of diagenesis (i) to impact fracture distribution, by creating mechanical contrasts to rock layers via cementation of pore space, and (ii) to generate fractures via mineralogic volume changes.

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Depth-Dependent Transformation of Kaolinite to Dickite In Sandstones of ...

in the statfjord formation (late triassic-early jurassic) from gullfaks and gullfaks sør fields, transformation of kaolinite to dickite occurs at ~3.1 km below the sea floor (120°c) from the stø and nordmela formations (lower to middle jurassic) to the troms area, kaolin polytypes have been identified in only two shallow and two deep samples, but .

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Diagenetic characteristics and quantitative evolution of porosity in ...

Sandstones in the middle diagenesis stage were characterized by quartz overgrowth, volcanic debris dissolution, cementation, and calcite and kaolinite replacement. Based on the formula from Beard and Weyl, we calculated that the original porosity of tight gas sandstones was 38.61%.

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Sandstone Diagenesis: Recent and Ancient | Wiley

Records the development of diagenesis from the description of grain shapes through provenance, petrography and analytical geochemistry to predictive models of diagenetic process. ... The Role Of The Late Cimmerian Unconformity For The Distribution Of Kaolinite In The Gullfaks Field, Northern North Sea: P.A. Bjørkum, R. Mjøs, O. Walderhaug And ...

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Depositional and burial history controls on the diagenetic evolution of ...

Typical features include quartz overgrowths, the development of authigenic kaolinite, chlorite and illite, albitization, as well as Fe-dolomite and titanium and ferruginous cementation that resulted in decreased permeability by reducing pore-throat openings in the studied sandstones. UOW Authors AL-Juboury, Ali I. (external author)

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Diagenetic Development of Kaolinite | SpringerLink

Diagenetic Development of Kaolinite C. D. Curtis & D. A. Spears Clays and Clay Minerals 19, 219-227 ( 1971) Cite this article 2 Accesses 30 Citations Metrics Abstract Experimental solubility data for gibbsite and kaolinite are reviewed and applied to the problem of gibbsite stability within the natural environment.

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Porosity Development Controlled by Deep-Burial Diagenetic Process in ...

Interconnected, secondary, open porosity is associated with pyrite, kaolinite/dickite, and postdates of the late-stage calcite cement. This indicates that dissolution processes took place in the deep burial realm in an extraformational fluid-dominated diagenetic system.

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Minerals | Free Full-Text | Coupling between Diagenetic Environment and ...

The diagenetic environment is vital in controlling reservoir quality by influencing diagenetic processes, especially porosity evolution. The Zhuhai Formation is a critical exploration target in the Huizhou Sag. However, there are considerable differences between the reservoirs in the west (Huixi) and east (Huidong) Huizhou Sag with only a 400 m difference in burial depth.

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Textural controls on sandstone diagenesis - osti.gov

The U.S. Department of Energy's Office of Scientific and Technical Information

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Numerical Simulation of Diagenetic Stage in Sandstone Reservoir of ...

pore development zone, and research original pore reservation and secondary pore increase and decrease in reservoir evolution ... diagenetic stage distribution and type, diagenetic stage distribution and type of reservoir during geological historical evolution period is back stripped through diagenetic ... enlargement (autogenic kaolinite may ...

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Porosity Development Controlled by Deep-Burial Diagenetic ... - Hindawi

pyrite, kaolinite/dickite, and postdates of the late-stage calcite cement. This indicates that dissolution processes took place in the deep burial realm in an extraformational fluid-dominated diagenetic system. The findings of this study add a unique insight to

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Provenance and Diagenetic Studies - Glomacs Training & Consultancy

This GLOMACS Provenance and Diagenetic Studies of Sandstone Reservoirs training course is aimed at giving oil industry geologists a detailed introduction on provenance, diagenesis and reservoir potential/distribution of sand bodies/sandstone reservoirs. The training course will thus provide petroleum geologists with conceptual and practical ...

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Diagenetic Kaolinite/Dickite (Betic Cordilleras, Spain)

Published: 01 October 1993 Diagenetic Kaolinite/Dickite (Betic Cordilleras, Spain) M. D. Ruiz Cruz & L. Moreno Real Clays and Clay Minerals 41, 570-579 ( 1993) Cite this article 3 Accesses 24 Citations Metrics Abstract The lower Permo-Triassic sediments of the Maláguide Complex contain abundant dickite.

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Energy Exploration & Exploitation Control of differential diagenesis

Type II is characterized by medium-strength compaction, altered kaolinite orchlorite cemen- tation, weak dissolution of diagenetic facies, and medium porosity and permeability. This type is dominated by residual intergranular pores, a few residual intergranular pores, and dispersed dis- solution pores, producing gas reservoirs with low gas yield.

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Mineralogy and chemistry of Cambrian ( ?) paleosols, Tandilia ... - Persée

Irregular fissures infilled with kaolinite are common. Abundant beidellite produced from the weathering of hornblende and vermiculite and/or chlorite, produced from the weathering of biotite, as well as 10- (10-14 )I, (considered of diagenetic origin) constitute the clay fraction. s 8. 180

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"The Twiggs Clay: mineralogy, origin, and industrial properties of an ...

The Twiggs Clay is an upper Eocene claystone found as discontinuous deposits downdip of the Fall Line in the Coastal Plain Province of eastern and central Georgia. A distinctive facies of the Twiggs is found in two lenses near the town of Wrens. The nature, origin, and potential commercial application of this resource are examined. Four strata and two mineralogic assemblages are recognized in ...

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An identification method for diagenetic facies with well logs ... - CNKI

Based on analyses of characteristics of conventional log responses to five different diagenetic facies in Chang 8 reservoirs of the Jiyuan region,Ordos Basin,such as diagenetic facies of weak corrosion with chlorite mat,corrosion of unstable components,compaction density,kaolinite filling and carbonate cementation,we proposed a method to continuously identify diagenetic facies quantitatively ...

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STABLE ISOTOPE EVIDENCE FOR THE ORIGIN OF DIAGENETIC CARBONATE ... - gov.il

These results indicate that shallow burials, early in the diagenetic history included formation of siderite and early calcite cements. Further burial led to formation of dolomite and late calcite cements. Ankerite formation took place late in the diagenetic history. A significant negative correlation obtained between the burial depth and the 0180

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Turbidite Chicontepec Formation, Channel Chicontepec, Mexico. A ...

The main authigenic cements are kaolinite, chlorite, calcite, ankerite and interstratified I/S. The facies described from core samples were adjusted with microfacies obtained from thin sections where permeabilities ranging 0.1 to 400 milidarcy, and porosities between 4 to 15% and occasionally 20% could be differentiated.

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Diagenetic Kaolinite/Dickite (Betic Cordilleras, Spain)

DTA and IR data agree with those from XRD. The observed compositional and structural variations are a function of the lithology and the particle size of the sample. The sequence kaolinite ~ kaolinite/dickite ~dickite is proposed for the development of these materials during Alpine metamorphism.

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Implications of lithofacies and diagenetic evolution for reservoir ...

The homogenization temperature of the most saline inclusions in the Chang 6 reservoir ranges from 90 °C to 120 °C (Table 2 and Fig. 10), which indicates that the diagenetic temperature of Chang 6 sandstone has reached the temperature boundary of kaolinite's illitization. Moreover, once the reaction is triggered, the illitization of kaolinite ...

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Minerals | Free Full-Text | Kaolinite-to-Chlorite Conversion ... - MDPI

Jul 26, 2021The kaolinite-to-chlorite conversion is one of the chloritization processes that occurs in low temperature diagenetic and hydrothermal systems. The mechanism of this mineralogical transformation is still under discussion, since direct transformation, conversion via berthierine as intermediate phase or direct formation of berthierine/chlorite mix, either by dissolution-crystallization or by ...

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Diagenetic mineralization in Pennsylvanian coals from Indiana ... - USGS

Cleats and fractures in southwestern Indiana coal seams are often filled with authigenic kaolinite and/or calcite. Carbon- and oxygen-stable isotope ratios of kaolinite, calcite, and coalbed CO2 were evaluated in combination with measured values and published estimates of ??18O of coalbed paleowaters that had been present at the time of mineralization. ??18Omineral and ??18Owater values ...

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Diagenesis and Reservoir Properties of Sandstones of the ... - NTNU

Mechanical compaction is the main diagenetic features that affected the sediments during the ... The Battfjellet Sandstones show diagenetic alteration of clay minerals where kaolinite and chlorite have been observed as the most dominant clay minerals. ... A sketch of diagenetic processes that are occurring during development of sedimentary ...

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Diagenetic characteristics and quantitative evolution of porosity in ...

In the early diagenetic stage, the reservoirs mainly underwent intensive compaction, hydrolysis, and alteration of volcanic debris. Sandstones in the middle diagenesis stage were characterized by quartz overgrowth, volcanic debris dissolution, cementation, and calcite and kaolinite replacement.

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Basics of Clay Minerals and Their Characteristic Properties

Kaolinite is a 1:1 clay mineral with chemical formula Si 4 Al 4 O 10 (OH) 8. The rocks that are found to be rich in Kaolinite are identified as Kaolin or china clay . Kaolinite is derived from the kaolin which is very common and is a corruption of the Chinese Jailing (Pinyin; Wade-Giles romanization Kao-ling), meaning "high ridge," . The ...

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The Role of Diagenesis in Reservoir Development of the Big Clifty ...

These phases and processes enhanced preexisting porosity and permeability heterogeneities within the rock. Nodular pyrite, oil emplacement, and precipitation of poikilotopic calcite are the latest diagenetic events. Nodular pyrite and poikilotopic calcite are responsible for oil-saturation geometries distinctly discordant with rock fabric.

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