J4 ›› 2010, Vol. 40 ›› Issue (3): 707-712.

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A New Method of Well Log Interpretation by the Sedimentary
Microfacies-Lithofacies Used in the Conglomerate Reservoir

SHI Yan-yao1, SONG Xin-min2, HAO Zhi-hai3, YU Hong-wei1   

  1. 1.State Key Laboratory of EOR, Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
    2.Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
    3.Qian’an Oil Product Factory|Jinlin Oilfield Company, PetroChina Qian’an|Jilin 131400, China
  • Received:2009-08-11 Online:2010-05-26 Published:2010-05-26

Abstract:

For the sake of improving the well log interpretation accuracy on conglomerate reservoir and providing more reasonable parameters for reserves calculation, based on the research of mainly control factors of the conglomerate reservoir, taking Lower Karamay Formation as an example, the authors proposed a new method to get more accurate well log interpretation result, which takes the sedimentary microfacies-lithofacies as the basic interpretation interval. First, the core data was used  to recognize five kinds of sedimentary microfacies-lithofacies that are braided channel conglomerate, braided channel coarsesand, braided dams conglomerate，braided dams coarsesand，cross flow siltstone. Then the logging interpretation model for porosity, permeability and saturation was respectively built according to the different sedimentary microfacies-lithofacies. At last the error was analysis by the old three coring well. The results showed that the accuracy of various parameters is increased at different degree and the average decrease of relative errors for porosity, permeability and saturation is 3.09%, 6.95%, 5.38%, respectively.

Key words: sedimentary microfacies, lithofacies, conglomerate reservoir, well logging, Karamay oil field

CLC Number: 

  • P631.8
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