THE DETECTION OF FRACTURES IN THE VOLCANIC RESERVOIRWITH PRESTACK SEISMIC DATA
SUN Wei 1,WANG Yan-chun 1,LI Mei 2,YANG Rui 3,GUO Hai-hua 2,LI Yu-feng 1
1.Geodetection Laboratory, Ministry of Education, China University of Geosciences, Beijing 100083, China; 2.Landocean Energy Services Co.Ltd,Beijing 100084, China;3. Geological Exploration and Development Research Institute of Sichuan Petroleum Administration, Chengdu 610051, China
In recent years, the volcanic reservoir has become a new focus in reservoir prediction. Generally, fractures constitute an important factor of the volcanic reservoir, and volcanic rocks are characterized by variation of spatial distribution and complex internal lithology. Therefore, the detection of fractures in volcanic rocks is considered to be an research challenge. Based on the theory of prestack elastic impendence inversion and azimuthal anisotropy, this paper presents an idea for predicting fractures in the volcanic reservoir with prestack seismic data. First, the prestack elastic impendence inversion, as a highresolution inversion method, is introduced to predict the volcanic reservoir; then the change of kinetic property of seismic wave caused by fractures is analyzed, and the density and direction of fracture are predicted with the azimuthal anisotropy; finally, the distribution of volcanic reservoir as well as fractures is estimated comprehensively. The key to this idea is "detecting fractures with the thought of finding volcanic reservoir", and the special advantage of the method lies in its high resolution and outstanding prediction accuracy. As an example, this idea was used for reservoir prediction in a test area, with a satisfactory result obtained.
孙炜, 王彦春, 李梅, 杨锐, 郭海华, 李玉凤. 利用叠前地震数据预测火山岩储层裂缝[J]. 物探与化探, 2010, 34(2): 229-232.
SUN Wei, WANG Yan-Chun, LI Mei, YANG Rui, GUO Hai-Hua, LI Yu-Feng. THE DETECTION OF FRACTURES IN THE VOLCANIC RESERVOIRWITH PRESTACK SEISMIC DATA. Geophysical and Geochemical Exploration, 2010, 34(2): 229-232.