Journal of Jilin University(Earth Science Edition) ›› 2016, Vol. 46 ›› Issue (1): 270-278.doi: 10.13278/j.cnki.jjuese.201601304

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Using Geophysical Information to Describe Effective Reservoirs of Archean Buried Hill

Zhang Xinpei1,2, Yu Xuefeng3   

  1. 1. Exploration and Development Research Institute, Liaohe Oilfield Branch Company of PetroChina, Panjin 124010, Liaoning, China;
    2. Faculty of Geo-Resource and Information, China University of Petroleum, Beijing 102249, China;
    3. School of Earth Sciences, Yangtze University, Wuhan 430100, China
  • Received:2015-04-07 Online:2016-01-26 Published:2016-01-26
  • Supported by:

    Supported by Major Scientific and Technological Project of PetroChina(2012E-30)

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Abstract:

Based on the high precise pre-stack depth migration data of new acquisition and processing,we described the structures of inner buried hill combining with the information of seismic,geology and oil reservoir,which effectively improved the accuracy and reliability of analyzing inside fault and boundary of buried hill. The pattern of Dongshengpu buried hill is an anticline which is NW-SE trend; and the NE-NW and nearly EW-trending faults develop within the buried hill. The NE-trending fault is the major fault. According to the difference of log responses and the characteristics of microscopic reservoir space between multi-types lithology of metamorphic rocks of buried hill,six kinds of lithology are qualitatively identified combining with the data of 3700 logging system. We build a comprehensive chart to distinguish advantageous lithology and favorable-reservoir, by which the logging evaluation technology for porosity-fractured reservoirs in Archaeozoic metamorphic is further improved. Combining with the "hard data" of wells and the "soft data" of seismic, we analyze the key factors which influence the feature of inner reflection through the feature of rock matrix and fluid in reservoir and so on. 38 kinds of near well seismic attributes extracted are purposefully used to analyze seismic reflection characteristics for searching the matching relationship between lithology, fracture, seismic reflection, and production capacity. The prediction of inner favorable-reservoirs is achieved through selecting energy attribute,and the result indicates that the favorable-reservoirs are focused in some segments,the most favorable-reservoirs are in the range of 50-300 m under the top surface of the buried hill,and the reservoirs take the form of anomalous lentoid which are the favorable potential area in Dongshengpu buried hill oil pool.

Key words: metamorphic rock, inner buried hill, wave impedance, layer label, seismic properties, Dongshengpu buried hill

CLC Number: 

  • P631.8

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