Braided-river channel sand characterization based on waveform analysis: an example in Well Su X Area,Ordos Basin
GAO Gai1, ZHAO Yuhua1, HUANG Ligang1, DU Changjiang2, LUO Wenjie3
1. Research Institute of Petroleum Exploration and Development, Changqing Oilfield Company, Petro-China, Xi'an, Shaanxi 710018, China; 2. Research and Development Center, BGP Inc., CNPC, Zhuozhou, Hebei 072751, China; 3. Third Oil Production Plant, Changqing Oilfield Company, PetroChina, Yinchuan, Ningxia 750006, China
Abstract：H8 in Well Su X Area,Ordos Basin belongs to braided-river channel sediments.There are two sets of sands:H8s and H8x in the H8 member.Sand bodies are widely distributed and stacked in the vertical direction.To characterize these braided-river channel sands,we establish seismic response characteristics of braided-river based on its sedimentary model.A few interpretation tools provided by GeoEast are used to identify braided-river channel sands.Seismic waveform variation characteristics of H8 are identified and classified with the waveform clustering,and the main sand distribution is determined.At the same time,H8 member isochrones on seismic data and the minor sand distribution are obtained with strata slicing on lithologic bodies.These two analysis results are supplemented and verified to improve the seismic vertical resolution.The superimposed main channels and the upper and lower single-sand distribution are accurately characterized,which is consistent with the current geological understandings.Good drilling results in the area are achieved based on our research proposal.
高改, 赵玉华, 黄黎刚, 杜长江, 雒文杰. 基于波形分析的辫状河道砂体识别——以鄂尔多斯盆地苏X井区为例[J]. 石油地球物理勘探, 2018, 53(s2): 301-305.
GAO Gai, ZHAO Yuhua, HUANG Ligang, DU Changjiang, LUO Wenjie. Braided-river channel sand characterization based on waveform analysis: an example in Well Su X Area,Ordos Basin. Oil Geophysical Prospecting, 2018, 53(s2): 301-305.
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