Lithologic Reservoirs ›› 2019, Vol. 31 ›› Issue (6): 79-87.doi: 10.12108/yxyqc.20190608

• EXPLORATION TECHNOLOGY • Previous Articles     Next Articles

Application of PP-wave and SS-wave joint interpretation technology in gas cloud area

CHEN Guowen1, DENG Zhiwen2, JIANG Tailiang3, ZHANG Junyong1, YU Xuejiao1, QI Chengye1, XI Xiaoping1   

  1. 1. Geological Research Center, Geological Research Institute, Bureau of Geophysical Prospecting INC., CNPC, Zhuozhou 072750, Hebei, China;
    2. Bureau of Geophysical Prospecting INC., CNPC, Zhuozhou 072750, Hebei, China;
    3. Department of Geophysical Exploration, PetroChina Qinghai Oilfield Company, Dunhuang 736202, Gansu, China
  • Received:2019-04-06 Revised:2019-07-29 Online:2019-11-21 Published:2019-09-28

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Abstract: Sanhu area in Qaidam Basin is the main natural gas producing area of Qinghai Oilfield. However, Quaternary biogas reservoirs in this area have many geologic characteristics,such as new stratigraphic sedimentary age,poor diagenesis and loose rock structure,which lead to poor seismic structural imaging and low prediction accuracy of low abundance gas reservoirs in gas cloud area. Based on the high-quality P-wave and pure SSwave data acquired from the 2-D joint excitation test of"low frequency+S-wave"for oil and gas exploration,the joint calibration,joint interpretation and joint attribute analysis of PP-wave and SS-wave were adopted. The results show that there are micro-faults,and many low-amplitude structural traps and seismic anomaly traps have been found in the shallow layer of sanhu area. A set of PP-wave and SS-wave joint interpretation supporting technologies applicable for the shallow biogas in Sanhu area was formed,which fully shows the good application prospects of the PP-wave and SS-wave joint seismic exploration technology.

Key words: gas cloud area, PP-wave and SS-wave joint interpretation, low-amplitude structure, fault recognition

CLC Number: 

  • P631.4
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