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Hu Ming-yi - One of the best experts on this subject based on the ideXlab platform.
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RESERVOIR APPRECISAL OF TIGHT SandstoneS OF UPPER TRIASSIC XUJIAHE FORMATION IN THE WESTERN SICHUAN FORELAND BASIN
Natural Gas Geoscience, 2006Co-Authors: Hu Ming-yiAbstract:The sand bodies of the braided delta front are the main Sandstone reservoirs of the Xujiahe formation in the western Sichuan foreland basin.The sand bodies are consisted of quartz Sandstone and Lithic Sandstone with abundant impurity and Lithic fragment.Field observation and(cast) thin-section analysis indicate: the reservoir of area is low porosity and low permeable reservoir.The main type of pores is the secondary porosity.The result of the successive research indicate: the types of reservoir in Xujiahe formation are mainly of Ⅱ and Ⅲ,and the type of reservoir Ⅰ only have a little.
Yu Feng - One of the best experts on this subject based on the ideXlab platform.
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Diagenesis of Toutunhe Formation and Its Effect on Reservoir in Niuquanhu Area,Santanghu Oilfield
Xinjiang Petroleum Geology, 2009Co-Authors: Yu FengAbstract:The Toutunhe reservoir in Niuquanhu area of Santanghu oilfield is mainly composed of Lithic Sandstone,with an average porosity of 17.4% and average permeability of 13.1 ×10-3μm2.Its pore types include intergranular pore,intergranular dissolved pore,feldspar dissolved pore,a few cutting dissolved pore and few carbonate dissolved pore and matrix dissolved pore.The diagenesis appeared in the studied area is composed of compaction,cementation,metasomatism and dissolution.The target horizons are found in the late period of early diagenetic stage to the early period of late diagenetic stage.Differences of sedimentary facies,clastic constituents and burial conditions result in the difference of diagenesis in different areas.The cementation is the main reason for low permeability reservoir,followed by mechanical compaction.
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application of high pressure hg injection and rate controlled hg penetration experimental technique to studying reservoir microscopic pore structure taking toutunhe formation in niuquanhu area of santanghu oilfield as an example
Natural Gas Geoscience, 2008Co-Authors: Yu FengAbstract:The Toutunhe Sandstone reservoir in Niuquanhu area of Santanghu oilfield is mainly Lithic Sandstone,with an average porosity of 19.7% and average permeability of 77.9×10-3 μm2.The pore structure types are mainly intergranular pore,secondary are intergranular dissolved pore,feldspar dissolved pore,cuttings dissolved pore,and carbonate dissolved pore is seldom.With the help of casting thin slice,scanning electron microscope,conventional mecury penetration,and rate-controlled mercury penetration,this paper indicates that the microscopic pore structure in the Sandstone reservoir is complicated,and the anisotropism here is strong,the water flushing efficiency of the water-flooding is low,it is resulted from the reservoir microscopic anisotropism.
John C. Hopkins - One of the best experts on this subject based on the ideXlab platform.
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Traps associated with paleovalleys and interfluves in an unconformity bounded sequence; Lower Cretaceous Glauconitic Member, southern Alberta, Canada
AAPG Bulletin, 1992Co-Authors: James M. Wood, John C. HopkinsAbstract:The Glauconitic member in Badger, Little Bow, Retlaw, and Turin fields is an unconformity bounded sequence that formed on an ancient coastal plain in response to relative sea level fluctuations. The member consists of valley-fill and inter-valley strata. Valley-fill Sandstone bodies are thick elongate pods that formed from inner estuarine bars when sedimentation was laterally confined between valley margins. Inter-valley Sandstone bodies are thin discontinuous sheets that accumulated during highstands when outer estuarine embayments covered interfluvial areas adjacent to associated valleys. Numerous oil pools are stratigraphically trapped within quartzose Sandstones in valley-fill and inter-valley strata of the Glauconitic member in the study area. Common updip seals for these reservoirs are (1) intra-sequence facies changes from Sandstone to shale, and (2) low-permeability Lithic Sandstones that fill the cross-cutting paleovalleys of a younger sequence. Traps associated with many valley-fill pools are enhanced by differential-compaction anticlines. Several oil pools in the study area are hosted by discrete quartzose Sandstone bodies that lie beneath a valley filled with low-permeability Lithic Sandstone. These quartzose Sandstone bodies are interpreted to be remnants of older Glauconitic deposits that escaped erosion when a younger valley incised into, and followed the trend of, one or more older Glauconitic valleys.
Sok Cin Tye - One of the best experts on this subject based on the ideXlab platform.
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Provenance of early Palaeozoic Sandstones, southeastern Australia, Part 2: Cratonic to arc switching
Sedimentary Geology, 1999Co-Authors: G. P. Colquhoun, Chris L. Fergusson, Sok Cin TyeAbstract:Early Palaeozoic strata of the northeastern Lachlan Fold Belt, Australia, consist of an Early Ordovician sequence (Adaminaby Group) of quartz-rich turbidites and chert, and the conformably overlying Late Ordovician-?Early Silurian Coomber Formation, a mafic volcaniclastic sequence of Lithic Sandstone and mudstone with mafic volcanic and intrusive rocks. Analysis of detrital modes from the Adaminaby Group indicate a uniform quartzose petrofacies (Q91F2L7) composed of deep-water quartz and subLithic Sandstones derived from the west. By contrast, the Lithic Sandstone of the Coomber Formation represents a volcanoLithic petrofacies (Q1F34L65) of mainly intermediate volcanic detritus with a tendency to become more silicic up-section. These Sandstones are considered to be derived from a calc-alkaline andesitic-basaltic volcanic centre in the eastern Lachlan Fold Belt. The change from a quartz-rich petrofacies to a volcanoLithic petrofacies was sharp with no evidence of mixing. This change primarily reflects a rapid outpouring of mafic volcanic material in the Late Ordovician, together with an approximately concurrent eustatic rise in sea level.
P.j. Boult - One of the best experts on this subject based on the ideXlab platform.
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Membrane seal and tertiary migration pathways in the Bodalla South oilfield, Eromanga Basin, Australia
Marine and Petroleum Geology, 1993Co-Authors: P.j. BoultAbstract:Abstract The Middle Jurassic Hutton Sandstone oil accumulation at the Bodalla South oilfield in the Eromanga Basin, Australia is primarily a structural trap with stratigraphic control. In common with many others in this basin it does not appear to be full to the structural spill point. Analysis of mercury injection curves has revealed that the caprock of the Hutton Sandstone (i.e. the Birkhead Formation, which is predominantly a Lithic Sandstone) is a membrane type seal. The calculated maximum size of oil column that will accumulate beneath this caprock is 12.64 m and the maximum oil column encountered to date is 11.25 m. There is no waste zone above the Hutton Sandstone reservoir at Bodalla South.