川南筠连沐爱地区煤层含气量预测及控制因素分析
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
利用已有钻孔煤层气资料通过相关关系拟合获得了研究区煤层底板标高与含气量间的预测模型.利用该模型及地震解释获得的煤层底板标高数据预测了研究区8号主采煤层含气量分布.经后期煤层气探井实测数据验证,其预测精度达到85%以上.预测结果分析表明,远离断层的井预测精度高,而靠近断层的井预测误差大,其误差值在-1.86~4.32 m3/t之间.认为研究区煤层含气性总体受煤层底板标高(构造)控制,但复杂的小规模断层对煤层气具有聚集和散失双重作用,构造发育和展布规律应该是研究区煤层气靶区优选的首要考虑指标.
The model to predict the relation between coal seam floor elevation and gas content is established by fitting the existing data of coal seam gas. By using the model,the gas content distribution in main coal seam 8#is predicted according to coal floor elevation data obtained through seismic interpretation. Through the latter data validation,the prediction accuracy is found to be above 85%. The result showthat the greater the distance to fault the higher the prediction accuracy,in which the error is between- 1. 86 m3/ t and 4. 32 m3/ t. It is considered that the coal gas content is controlled by coal floor elevation,besides,the complex small-scale faults have two effects that may induce gathering or scattering of coal bed methane. So distribution of geologic structures should be considered as the priority for CBMtarget in the study area.
引文
[1]张建博,王红岩,赵庆波.中国煤层气地质[M].北京:地质出版社,2000.(Zhang Jian-bo,Wang Hong-yan,Zhao Qing-bo.Chinese coal-bed methane geology[M].Beijing:Geological Publishing House,2000.)
    [2]Langenberg C W,Beaton A,Berhane H.Regional evaluation of the coal bed-methane potential of the foothills/mountains of Alberta,Canada[J].International Journal of Coal G eology,2006,65(1/2):114-128.
    [3]Boyer C M,Bai Q.Methodology of coal bed methane resource assessment[J].International Journal of Coal G eology,1998,35(1/2/3/4):349-368.
    [4]Beaton A,Langenberg W,PanC.Coal bed methane resources and eservoir characteristics from the Alberta Plains,Canada[J].International Journal of Coal G eology,2006,65(1/2):93-113.
    [5]Nolde J E,Spears D.A preliminary assessment of in place coalbed methane resources in the Virginia portion of the central Appalachian Basin[J].International Journal of Coal G eology,1998,38(1/2):115-136.
    [6]Cai Y D,Liu D M,Yao Y B,et al.Geological controls on prediction of coal bed methane of No.3 coal seam in Southern Qinshui Basin,North China[J].International Journal of Coal G eology,2011,88(2/3):101-112.
    [7]Yao Y B,Liu D M,Tang D Z,et al.Preliminary evaluation of the coal bed methane production potential and its geological controls in the Weibei coalfield,Southeastern Ordos Basin,China[J].International Journal of Coal G eology,2009,78(1):1-15.
    [8]李纪森,陈英.应用密度测井值计算煤层含气量[J].测井专刊,1996(4):70-73.(Li Ji-sen,Chen Ying.To calculate the coal seam gas content use the density logging value[J].Logging,1996(4):70-73.)
    [9]潘和平,黄智辉.煤层含气量测井解释方法探讨[J].煤田地质与勘探,1998,26(2):58-60.(Pan He-ping,Huang Zhi-hui.Discussion on the log interpretation method of coalbed gas content[J].Coal G eology&Exploration,1998,26(2):58-60.)
    [10]王盼盼,秦勇,高弟.观音山勘探区煤层含气量灰色关联预测[J].煤田地质与勘探,2012,40(4):34-38.(Wang Pan-pan,Qin Yong,Gao Di.Grey relational prediction of coalbed methane content in Guanyinshan exploration district[J].Coal G eology&Exploration,2012,40(4):34-38.)
    [11]赵丽娟,秦勇,林玉成.煤层含气量与埋深关系异常及其地质控制因素[J].煤炭学报,2010,35(7):1165-1169.(Zhao Li-juan,Qin Yong,Lin Yu-cheng.Abnormal relation and its geological controls of coalbed methane content to buried depth of coal seams[J].Journal of China Coal Society,2010,35(7):1165-1169.)

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心