Oil & Gas Geology ›› 2013, Vol. 34 ›› Issue (4): 528-532.doi: 10.11743/ogg20130415

Previous Articles     Next Articles

Discovery of diapir structure and its significances for exploration in Doshan area, South Turgai Basin

Dai Hansong1, Hong Liang1, Zhang Mingjun2, Zhang Jing1, Zhang Yajun1, Wang Xin1   

  1. 1. Northwest Institute, PetroChina Research Institute of Petroleum Exploration and Development, Lanzhou, Gansu 730020, China;
    2. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
  • Received:2012-05-17 Revised:2013-07-18 Online:2013-08-28 Published:2013-08-27

Abstract: The diapir structure newly defined in Doshan area,South Turgai Basin is a typical duplex structure.The lower carbonate diapir superimposes on the deeper one,and maintains the consistency of structural configuration with that of the latter at the same time.These small-scale diapir structures are generally on NW-SE trend.They are recognized as deep-source diapirs based on their regional stress background,plastic deformation,and pyrolysis gas show.Their development is mainly controlled by the upswelling of deep materials along small-scale faults due to the revitalization of deep base paleo-faults during the Late Cretaceous large-scale strike-slipping and uplifting deformation in southern Turgai Basin.The discovery of this kind of structures not only provides a new mode of tectonic research,but also a new domain of petroleum exploration in southern Turgai Basin.Diapir structures located in slope-burial hill belt have favorable accumulation conditions,and are favorable targets for discovering structural and/or lithologic hydrocarbon reservoirs.

Key words: hydrocarbon migration and accumulation, diapir structure, burial hill-slope belt, Doshan area, South Turgai Basin

CLC Number: