Results 131 to 140 of about 700 (192)
Water (Switzerland), 2019 Paleokarst reservoirs are the major type of the Ordovician carbonate reservoirs in the Tahe Oilfield. Due to the strong heterogeneity in distribution, it is a real challenge to detect the spatial distribution of paleokarst reservoirs, especially those ...
Fei Tian, Zhongxing Wang, Fuqi Cheng
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Geocellular rendering of cave surveys in paleokarst reservoir models [PDF]
Marine and Petroleum Geology, 2020 Infilled and collapsed cave systems are an important component of many paleokarst reservoirs. Incorporating these features into industrial reservoir models commonly relies on geostatistical modelling methods that often fail to capture key aspects of ...
Bjarte Lønøy +2 more
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Marine and Petroleum Geology, 2016 The paleokarst-unconformity at the top of the Ordovician Yingshan Formation in the central Tarim basin was exposed to air for at least 10 Ma, providing favorable conditions for the later formation of high-quality reservoirs.
Yang, Liu, Yu, Jingbo
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2014
Karst is a term used to describe the processes and products of the natural dissolution of soluble rocks, usually limestone. It produces a distinctive suite of surface geomorphological features on scales of millimeter to kilometer. Many karst landforms are intimately linked to underground drainage systems, or caves, which are an integral component of ...
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Karst is a term used to describe the processes and products of the natural dissolution of soluble rocks, usually limestone. It produces a distinctive suite of surface geomorphological features on scales of millimeter to kilometer. Many karst landforms are intimately linked to underground drainage systems, or caves, which are an integral component of ...
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Paleokarsts at Unconformities: ABSTRACT
AAPG Bulletin, 1982The awareness of the importance of subaerial exposure in the diagenesis of limestones has led to the recognition of a variety of subaerial phenomena in carbonate sequences such as vadose cements and calcrete crusts. Other such phenomena include paleokarsts, of which there are surprisingly few detailed descriptions. One problem in recognizing paleokarst
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Fluid prediction for paleokarst carbonate reservoir
SEG Technical Program Expanded Abstracts 2015, 2015Summary Ordovician paleokarst carbonate reservoirs are widely developed in the Tahe Oilfield, China. The storage space is complex, mainly including dissolved caves, pores and fractures, which significantly influence the seismic velocity. In order to accurately discriminate the saturated pore fluids, DEM-Gassmann rock physic model is employed to address
Sam Zandong Sun +5 more
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1982
Karst-type ore deposits are a major new discovery in many countries made by many mining geologists during the past decade. The present paper offers a case study of an area in southern Sardinia where karstification took place at various intervals, producing superimposed karst systems and local sulphide-barite concentrations.
BONI, MARIA, AMSTUTZ G. C.
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Karst-type ore deposits are a major new discovery in many countries made by many mining geologists during the past decade. The present paper offers a case study of an area in southern Sardinia where karstification took place at various intervals, producing superimposed karst systems and local sulphide-barite concentrations.
BONI, MARIA, AMSTUTZ G. C.
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Paleokarst as a target for modern karstification
Carbonates and Evaporites, 1995Paleokarst phenomena are those that at present or for some duration in the past have been decoupled from all active hydrogeochemical systems. They are widely distributed geographically and are recognized from the Lower Proterozoic onwards in the geological record. Amongst the many fascinating features that they offer for study is their exploitation as “
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Ordovician Knox Paleokarst Unconformity, Appalachians
1988The Ordovician Knox unconformity in the Appalachians developed in less than 10 m.y. during a time of initial collision of the passive margin and of eu- static sealevel lowering. It formed on cyclic limestones and dolomites of the 200- to 1200-m-thick Upper Knox-Beekmantown Group, and provides an example of the effects of long-term exposure on a ...
William J. Mussman +2 more
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