Classification and characteristics of karst reservoirs in China …
Feb 1, 2009 · There are many types of corrosion fluid in carbonate rocks in petroleum basins. It is important for the reservoir evaluation and prediction to reconstruct them and to analyze the genetic mechanics of the karst pore-cave-fracture and large-scale cave.
Karst topography: Formation, processes, characteristics, …
Jan 1, 2024 · Karst refers to any topography or landform that forms over soluble rocks. The classic karst landforms, which include enclosed depressions, sinking streams, and caves, are primarily generated by surface and subsurface waters dissolving rocks; mechanical erosion plays a secondary role.
The three types of porosity (a) and associated flow possible in karst …
Solutional (karst) and lava caves are the most extensive and frequent. Karst caves occur in carbonates, sulphates and halite; large lava tubes form in basalt.
Karst - Wikipedia
Karst (/ k ɑːr s t /) is a topography formed from the dissolution of soluble carbonate rocks such as limestone and dolomite. It is characterized by features like poljes above and drainage systems with sinkholes and caves underground.
Porosity and permeability of karst carbonate rocks along an ...
There are minor original syndepositional interparticle and diagenetic intercrystalline porosities. Large field-sized pores were cavernous and of the fractured type (Figure 4), as large as 3 m wide for the caves and 3 m long for the fractures.
Karstification - an overview | ScienceDirect Topics
Karstification is defined as an epigenic process involving the dissolution of calcite in carbonate rocks due to the infiltration of water containing CO2, resulting in the creation of large porosity and permeability for water flow. You might find these chapters and articles relevant to this topic. Xianzheng Zhao, ...
12.2: Karst Landscapes, Landforms, and Surface Features
Nov 24, 2023 · Exokarst is used to describe all features found on the surface of the karst landscape that range from the small-scale to large-scale (e.g., karren to sinkholes to poljes). Endokarst is used to describe all components of underground karst including the smallest cavities, cave formations, erosional features, and large cave passages.
Reconstructing large‐scale karst paleogeomorphology at the top …
Oct 1, 2019 · Taking the Ordos Basin, currently the largest petroliferous basin in China, as an example, this study examines the large-scale, long-term (~120 Myr) paleokarst at the top of the Ordovician.
3.8 Karst Aquifer Flow Characteristics Compared with Aquifers …
Characteristics unique to karst aquifers are extreme heterogeneity, multilevel porosity and permeability, conduit-dominated groundwater flow, point-source recharge, and large temporal variability in flow and chemistry due to rapid recharge and to mixing of water from multiple recharge sources.
Formation environments and mechanisms of multistage …
Jan 12, 2021 · Based on petrology, mineralogy and geochemical data, pore types, distribution characteristics, and formation stages of the Ordovician paleokarst were analyzed. Then, in attempt to define the...