Volume 21 Issue 4
Dec.  2015
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Article Navigation >  Journal of Geomechanics  > 2015  >  21(4): 492-501
ZHU Rong-wei, JIANG You-lu, LIU Jing-dong, et al., 2015. PALEO-PRESSURE RESTORATION AND DYNAMIC MECHANISM FOR HYDROCARBON MIGRATION AND ACCUMULATION OF Es3 MEMBER IN NORTH DONGPU SAG. Journal of Geomechanics, 21 (4): 492-501.
Citation: ZHU Rong-wei, JIANG You-lu, LIU Jing-dong, et al., 2015. PALEO-PRESSURE RESTORATION AND DYNAMIC MECHANISM FOR HYDROCARBON MIGRATION AND ACCUMULATION OF Es3 MEMBER IN NORTH DONGPU SAG. Journal of Geomechanics, 21 (4): 492-501.
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PALEO-PRESSURE RESTORATION AND DYNAMIC MECHANISM FOR HYDROCARBON MIGRATION AND ACCUMULATION OF Es3 MEMBER IN NORTH DONGPU SAG

  • School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China

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  • Received: 2015-02-11
  • Published: 2015-04-01
    Abstract
  • With the application of fluid inclusions and basin simulation method, we restored the paleo-formation pressure of the third member of Shahejie formation (Es3) in North Dongpu sag, and analyzed the dynamic mechanism for hydrocarbon migration and accumulation. The results showed as follows:The formation pressure of Es3 during accumulation period was mainly controlled by the structural framework and the centers of subsidence and hydrocarbon generation, and the overpressure amplitude was largest in the sub-sag area with relatively larger in the central uplift belt and smallest in the west slope area. Controlled by the salt layer, the residual pressure of the lower formation was relatively high in Puwei and Wenliu. The overpressure and buoyancy were the main driving forces for the hydrocarbon accumulation of Es3, and the normal pressure zone and transitional zone were the main hydrocarbon accumulation places. There are three types of dynamic mechanism for hydrocarbon migration and accumulation in the study area including overpressure drive, overpressure-buoyancy drive and buoyancy drive. Overpressure zone including the slope zone and the sub-sag zone is mainly overpressure driven. Overpressure transition zone including part of the central uplift belt is mainly overpressure-buoyancy driven. And normal pressure zone including the west slop and part of the central uplift belt is mainly buoyancy driven.

     

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