Classification, modeling and characterization of marine carbonate paleokarst reservoirs in Tahe Oilfield, Tarim Basin, China

Sensitivity Analysis of Mechanical Parameters of Collapse Roof of Carbonate Rock Deep Buried Oilfield

“…The Ordovician reservoir is buried at a depth of 5300~6200 m. It is a typical deep carbonate rock fracture cave-type oil and gas reservoir formed through multi-stage reservoir formation and multi-stage reconstruction. The large-scale paleokarst karst cave system is the main type of reservoir space [23][24][25]. The filling phenomenon of paleokarst fractures and caves is common in the Tahe oilfield.…”

Fine Modeling of Multiscale Fracture Cavity Fusion in Fault Solution Reservoirs Based on Multiscale Discrete Crack Modeling Method

“…Marinković et al conducted a composite hydrogeothermal investigation of the post-Neotethys Late Paleogene Neogene crustal core complex in the Kopaonik Mountains of the southwestern Serbian Plateau. The fractured carbonate reservoirs in Tahe Oilfield are different from conventional porous sandstone reservoirs and other karst carbonate reservoirs. − The main storage space of oil reservoirs is mainly composed of cracks and caves formed by structural deformation and collapse, as well as pores and caves formed by karst processes. − The large karst caves are the most important storage space, and cracks are the main connecting channels. − Due to the different types of karst caves and cracks of different scales, their morphology and scale are different, making it difficult to establish a unified geological model using a single method. − Therefore, different modeling methods are used to establish discrete models for different constituent elements. − Then, the discrete models were integrated into a wpore, establishing a three-dimensional distribution model of the fractured and vuggy reservoir. − …”