Prediction of coal body structure by waveform indication inversion based on prestack AVO data
LU Xiuqin1, WANG Guanmei2, YANG Yanhui3, ZHANG Wanfu2, ZHANG Yongping1, TANG Meizhen2
1. Exploration and Development Research Institute, PetroChina Huabei Oilfield Company, Renqiu, Hebei 062550, China; 2. Geological Research Center, BGP, CNPC, Zhuozhou, Hebei 072751, China; 3. PetroChina Huabei Oilfield Company, Renqiu, Hebei 062550, China
Abstract：The coal body structure is the key factor to evaluate and optimize favorable zones of coalbed methane, and it can affect the exploration and development of the coalbed methane. At present, the structure type of a coal body is mainly determined based on coal core and well logging, and the three-dimensional spatial prediction for the structure type of the coal body based on seismic data is still in the exploration stage. This paper studies a block in Qinshui Basin. Firstly, the structure type of the coal body directly identified by borehole coring is taken as an effective qualitative basis, and then the Lame coefficient μρ is selected as the sensitive elastic parameter for identifying the structure type of the coal body by using the petro-physical analysis technology. In addition, the seismic data including prestack AVO information is innovated to predict the Lame coefficient μρ body through waveform indication inversion technology. Finally, according to the μρ value range difference between primary coal and structural coal, the distribution law of primary coal and structural coal is predicted. The prediction results in this research area conform to the geological law, and its coincidence degree with the actual drilling is as high as 82%. Therefore, the research results can effectively guide production and practice.
朱庆忠, 杨延辉, 王玉婷, 等.高阶煤层气高效开发工程技术优选模式及其应用[J].天然气工业, 2017, 37(10):27-34.ZHU Qingzhong, YANG Yanhui, WANG Yuting, et al.Optimal geological-engineering models for highly efficient CBM gas development and their application[J].Natural Gas Industry, 2017, 37(10):27-34.
[2]
罗莎, 汪凌霞.关于煤体结构判识方法的探讨[J].石油化工应用, 2017, 36(4):98-101.LUO Sha, WANG Lingxia.Discussion on methods of coal body structure identification[J].Petrochemical Industry Application, 2017, 36(4):98-101.
[3]
张许良, 单菊萍, 彭苏萍.地质测井技术划分煤体结构探析[J].煤炭科学, 2009, 37(12):88-92.ZHANG Xuliang, SHAN Juping, PENG Suping.Discussion and analysis on geological logging technology applied to divide coal mass structure[J].Coal Science and Technology, 2009, 37(12):88-92.
[4]
何游, 要惠芳, 陈强.基于测井响应的韩城矿区煤体结构定量判识方法[J].煤矿安全, 2015, 46(6):178-182.HE You, YAO Huifang, CHEN Qiang.Quantitative identification method for coal body structure based on logging response in Hancheng Mining Area[J].Safety in Coal Mines, 2015, 46(6):178-182.
[5]
傅雪海, 姜波, 秦勇, 等.用测井曲线划分煤体结构和预测煤储层渗透率[J].测井技术, 2003, 27(2):140-143.FU Xuehai, JIANG Bo, QIN Yong, et al.Classification of coalbody structure and prediction of coal reservoir permeability with log curves[J].Well Logging Technology, 2003, 27(2):140-143.
[6]
彭刘亚, 崔若飞, 任川, 等.利用岩性地震反演信息划分煤体结构[J].煤炭学报, 2013, 38(增刊2):410-415.PENG Liuya, CUI Ruofei, REN Chuan, et al.Classification of coal boby structure using seismic lithology inversion infomation[J].Journal of China Coal Society, 2013, 38(S2):410-415.
[7]
张留荣, 曾维望.地震技术在煤层气勘探开发中的应用现状与发展趋势[J].中国煤炭地质, 2017, 29(6):68-73.ZHANG Liurong, ZENG Weiwang.Application status quo and development trend of seismic prospecting technology in CBM exploitation[J].Coal Geology of China, 2017, 29(6):68-73.
[8]
王远, 崔若飞, 孙学凯, 等.利用地震反演信息划分煤体结构[J].煤田地质与勘探, 2011, 39(4):69-73, 76.WANG Yuan, CUI Ruofei, SUN Xuekai, et al.Uti-lizing seismic inversion information in classifying coal structures[J].Coal Geology & Exploration, 2011, 39(4):69-73, 76.
[9]
侯月华, 姚艳斌, 杨延辉, 等.基于对应分析技术的煤体结构判别:以沁水盆地安泽区块为例[J].煤炭学报, 2016, 41(8):2041-2049.HOU Yuehua, YAO Yanbin, YANG Yanhui, et al.Discriminate method of coal structure based on correspondence analysis technology:a case study in the Anze area, Qinshui Basin[J].Journal of China Coal Society, 2016, 41(8):2041-2049.
[10]
孟召平, 张吉昌, TIEDEMANN J.煤系岩石物理力学参数与声波速度之间的关系[J].地球物理学报, 2006, 49(5):1505-1510.MENG Zhaoping, ZHANG Jichang, TIEDEMANN J.Relationship between physical and mechanical pa-rameters and acoustic wave velocity of coal measures rocks[J].Chinese Journal of Geophysics, 2006, 49(5):1505-1510.
[11]
成林.构造煤地球物理响应研究[D].河南焦作:河南理工大学, 2012.CHENG Lin.Research on Geophysical Response of Deformed Coal[D].Henan Polytechnic University, Jiaozuo, He'nan, 2012.
