Lithologic Reservoirs ›› 2021, Vol. 33 ›› Issue (1): 25-36.doi: 10.12108/yxyqc.20210103

• FORUM AND REVIEW • Previous Articles     Next Articles

New progress in study of play and trap evaluation technology for lithostratigraphic reservoirs

LIU Huaqing1, LIU Zongbao2, WU Kongyou3, XU Huaimin4, YANG Zhanlong1, SUN Xiping5, NI Changkuan1, KANG Jilun6, WANG Mu7, JIN Jikun6   

  1. 1. PetroChina Research Institute of Petroleum Exploration & Development-Northwest, Lanzhou 730020, China;
    2. School of Earth Sciences, Northeast Petroleum University, Daqing 163318, Heilongjiang, China;
    3. School of Geosciences, China University of Petroleum(East China), Qingdao 266580, Shandong, China;
    4. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;
    5. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
    6. Research Institute of Exploration and Development, PetroChina Tuha Oilfield Company, Hami, 839009, Xinjiang, China;
    7. Research Institute of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang 736202, Gansu, China
  • Received:2020-07-10 Revised:2020-10-18 Online:2021-02-01 Published:2021-01-25

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Abstract: Based on the research results during the 13th Five-Year Plan period,two sets of technology system of play evaluation,trap boundary identification and effectiveness evaluation for lithostratigraphic reservoirs were summarized by combining geology with geophysical exploration and highlighting the application of intelligent technology.(1)The play evaluation technology system for lithostratigraphic reservoirs outside the source area is based on quantitative evaluation of fault/sand body migration system,effectiveness evaluation of fault-related mudstone seals,weathered-clay identification in unconformity belt and quantitative evaluation of sealing ability. (2)The trap boundary identification and effectiveness evaluation technology system for lithostratigraphic reservoirs is based on the recognition of subtle sequence boundary and the establishment of high-frequency sequence framework,seismic prediction of sedimentary system distribution based on multi-attribute clustering in laterally changing seismic window,and thin interbedded reservoir prediction based on sparse theoretical seismic inversion and stratal slicing using minimum seismic interference frequency data. After being popularized and applied, these technologies provide strong technological support for deploying risk exploration wells in related basins.

Key words: lithostratigraphic reservoirs, play evaluation technology, trap evaluation technology, migration system, sealing effectiveness, weathered-clay bed, unconformity structure

CLC Number: 

  • TE122.1
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