Lithologic Reservoirs ›› 2016, Vol. 28 ›› Issue (2): 93-100.doi: 10.3969/j.issn.1673-8926.2016.02.013

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Integrated evaluation method of water flooded layer in ultra-low permeability reservoir in peripheral Daqing Oilfield

Zhang Meiling1， Qi Meng1， Lin Lili2   

  1.  1. College of Earth Sciences ， Northeast Petroleum University ， Daqing 163318 ， Heilongjiang ， China ； 2. Well Logging Company ， Daqing Drilling Engineering Company ， Daqing 163403 ， Heilongjiang ， China
  • Online:2016-03-20 Published:2016-03-20

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Abstract:

Affected by the internal complex pore structure of low permeability reservoir, the reflecting ability of logging value to the changes of fluid in the formation is weak. Thus, it is difficult to use logging data to distinguish water flooded degree of reservoir. It can reflect the current water flooded degree of sand body by using dynamic information which is from interconnected sand body between injection wells and production wells during the water injection development process. The implementation steps are as following: （1） study the variation characteristics of logging value of flooded layers by using basic principle of logging methods, give the identification rules of water flooded degree, and divide the layers which satisfies these rules to uncertain flooded layers; （2） on the basis of building dynamic development unit, carry out further determination for the water flooded degree of the uncertain flooded layers according to the water absorbing capacity of small layers and water content of separate layer during the fluid production process from in adjacent wells. These two steps were applied to identify water flooded degree in ultra-low permeability oilfield in peripheral Daqing Oilfield, and good application effect was obtained.

Key words: Tight sandstone reservoir, petrophysical facies, high-quality reservoir, the second member of Xujiahe Formation, Anyue area

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