Research progress and prospect of Ordovician carbonate rocks in Tahe oilfield: karst feature

Abstract Inspired by structural geology, karstology, geomorphology, as well petroleum coupling excellent documented research works and the field investigation, status prospect for studies on karst feature of Tahe oilfield are discussed comprehensively. Results indicate: (a) majority have appeared since 2000 can be classified three categories 12 subclasses, in which caves, fracture cave systems fault-karst reservoirs considered main topics, (b) existed divided into four stages, reservoir analysis is a hot spot recently, focusing scale formed reservoir. It common sense that faults control both fractures caves. Originally, there exist close relationships among phenomena whether they're ground or underground. Revealing these mentioned above important direction future. As areas where widely distributed karst, hierarchical properties karstology: (1) fault controls topography landform, (2) fault, landform water system (3) topography, karst. These basic connotation laws evolution, vital goals study well. Applications methods techniques field-karst investigation solid guarantees to achieve goals.