Oil & Gas Geology ›› 2021, Vol. 42 ›› Issue (3): 747-754.doi: 10.11743/ogg20210319

• Methods and Technologies • Previous Articles     Next Articles

Seismic prediction of tight sandstone reservoir fractures in XC area, western Sichuan Basin

Junzhou Liu1(), Lei Han1, Lei Shi1, Shuangquan Chen2,*(), Wenya Lyu2   

  1. 1. Exploration and Production Research Institute, SINOPEC, Beijing 100083, China
    2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China
  • Received:2019-09-30 Online:2021-06-28 Published:2021-06-23
  • Contact: Shuangquan Chen E-mail:stonecsq@126.com;chensq@cup.edu.cn

Abstract:

A seismic fracture prediction method is proposed based on the fusion of multiple prestack and poststack seisimc attributes for predicting the development of tight sandstone reservoir fractures in XC area in the Sichuan Basin.The fracutres in the area include both large-scale fracutres that can be identified by seismic responses and small-scale fracutres that can not be readily identified by seismic responses.It is the latter that requires special processing.The geometric seismic attributes related to large-scale fractures are firstly extracted by using the poststack seismic data of high signal-to-noise ratio and then combined with the distribution pattern of the fractures in the target layer characterized with multi-attribute fusion to predict the distribution of small fractures through further combination with frequency-dependent anisotropic parameter inversion.At last, the prediction results are summarized to analyze the fracture distribution pattern of the target layer, with a view to accurately depicting potential targets with well-developed fractures.In all, the actual data obtained are consistent with predicted results, showing that fractured reservoirs can be accurately described by using this integrated multi-scale fracture prediction technology.

Key words: multi-scale fracture, seismic anisotropy, fracture prediction, reservoir characterization, tight sandstone

CLC Number: