--> Abstract: Application of Spectral Decomposition Technique in Reservoir Exploration in the Junggar Basin of West China, by Cai Gang, Su Mingjun, Yao Qingzhou, and Gong Honglin; #90124 (2011)

Datapages, Inc.Print this page

AAPG ANNUAL CONFERENCE AND EXHIBITION
Making the Next Giant Leap in Geosciences
April 10-13, 2011, Houston, Texas, USA

Application of Spectral Decomposition Technique in Reservoir Exploration in the Junggar Basin of West China

Cai Gang1; Su Mingjun1; Yao Qingzhou1; Gong Honglin1

(1) Research Institute of Petroleum Exploration & Development-Northwest, Petrochina,730020, Lanzhou, China.

Frequency spectrum decomposition technique is a frequency based reservoir interpretation method. As an advanced high definition imaging technique of discrete geologic bodies, it can be used to detect the discreteness of thin layers and geologic bodies in the 3D survey areas by using seismic data. Seismic data in time domain can be converted into frequency domain through Discrete Fourier Transform (DFT). The converted amplitude spectrum can be used to detect the variability of temporal bed thickness, while the phase spectrum can be used to indicate the lateral discontinuity of geologic bodies. Jurassic in the central Junggar Basin is a sequence of meandering river or braided river delta deposits, but the dominant frequency of the seismic data is relatively low, so it is difficult to describe the lithologic and stratigraphic traps by using conventional methods. It has been successfully used to identify channels, lithologic boundaries, faults and stratigraphic denudation line in several 3D survey areas in Junggar Basin.