In this paper, we attempt to clarify the relationships between oilfield water and hydrocarbon distribution of Triassic Baikouquan Formation, in slope zone Mahu depression, Junggar Basin, NW China, based on mineralization degrees, diagenesis analysis, formation pressure coefficients, burial history, thermal evolution processes. The results show that study area can be divided into four zones acco...

The term proteoform describes all combinations of change in a protein, as elucidated through intact mass proteomics. Paleoproteomic studies have begun using digestion-free and top-down techniques to access information from ancient historical remains. However, discuss protein changes that uniquely occur archaeological paleontological proteomes the result diagenesis (i.e., physical chemical impar...

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...

The geochemical composition of foraminiferal tests is a valuable archive for the reconstruction of paleo-climatic, -oceanographic and -ecological changes. However, dissolution of biogenic calcite and precipitation of inorganic calcite (overgrowth and recrystallization) at the seafloor and in the sediment column can potentially alter the original geochemical composition of the foraminiferal test...

-A complete conversion series for mica/smectites was found in a hydrothermal alteration envelope around Kuroko-type ore deposits at the Shinzan area, Akita Prefecture, Northeast Japan. The minerals are an alteration product of volcanic glass of Miocene age and are commonly associated with zeolites and silica minerals. Degrees of ordering of interstratification of the minerals change discontinuo...

Middle Jurassic fluvio-deltaic and turbiditic mudstones of the Kashafrud Formation, are important hydrocarbon sources in the gas-rich Kopet-Dagh Basin, northeast Iran. Clay mineral assemblages are important for interpretation of sediment provenance and for understanding burial diagenetic cementation in sandstones. The clay mineral assemblages in mudrocks in two areas, Saleh-Abad and Senjedak, w...

The optimization of reservoir sweet spots is the key to efficient exploration and development low-permeability tight sandstone gas reservoirs. However, offshore deep, has characteristics large burial depth, diagenesis heterogeneity prominent importance diagenetic facies, which make it difficult predict spots. This work comprehensively used logging data, core observation, conventional analysis, ...

Diagenesis in the Permo-Triassic New Red Sandstone, Isle of Arran is characterized by early cementation hematite, clay, and calcite minerals, followed burial compaction, quartz, feldspar, pyrite cementation. Cataclasis post-dated quartz feldspar reduced grain pore aperture size deformed samples. Samples with cataclastic bands typically have 18% porosity 8.81 mD permeability on average. Whereas,...

To evaluate the effects of quartz precipitation on abundance and preservation organic matter pores in marine shale reservoirs, type authigenic source silica, as well corresponding relation Lower Cambrian Shuijingtuo Formation South China were investigated. Quartz occurs four different types: detrital quartz, replacement biosiliceous debris, euhedral filled interparticle pores, microquartz dispe...