应用偶极横波测井资料识别三湖地区低阻气层  

Low resistivity gas-bearing layer identification with DSI in Sanhu area

作　　者：马龙[1] 石强[2] 肖玉峰[2] 王秀芹[2] 及志宇[2] 刘凤新[2] 

机构地区：[1]中国地质大学(北京),北京100083 [2]中国石油勘探开发研究院廊坊分院,廊坊065007

出　　处：《地球物理学进展》2011年第2期565-571,共7页Progress in Geophysics

基　　金：国家大型油气田及煤层气开发科技重大专项<中国大型气田形成条件;富集规律及目标评价>项目(2008ZX05007)下属<大型气田优质储层形成机理与天然气藏地球物理识别及预测技术>课题(2008ZX0500702)项目资助

摘　　要：三湖地区储层为疏松砂岩.受高束缚水含量以及高地层水矿化度因素控制,储层发育有大量的低阻气层,无法应用常规测井交会图技术进行有效识别.本文利用偶极横波成像测井、密度测井资料计算得到了对含气饱和度变化敏感的弹性参数,定义了含气性指示系数评价弹性参数含气敏感性,应用实际资料优选出敏感度高的弹性参数并给出了气层识别标准.应用效果表明:该方法识别气层结果与生产试气的结果吻合得很好,为三湖地区低阻气层的定性识别提供了一种新方法.The reservoirs are unconsolidated sandstone in Sanhu area. There are many low resistivity gas-bearing layers because of the high bound water content and high formation water salinity, it is difficult to identify gas-bearing layer effectively by conventional logging crossplot technique. In this paper, a series of elastic parameters which are sensitive to the changes of gas saturation are calculated by using dipole shear sonic imager （DSI） logging data and density logging data. By defining the gas-bearing indicative coefficient, the sensitivity of elastic parameters can be evaluated quantitatively. The high sensitive parameters are optimized and the eigenvalues of elastic parameters for gas- bearing identification are proposed by the application of real data. The practical application shows that the result of gas-bearing identification through elastic parameters is consistent with the gas testing result, and a new method for low resistivity gas-bearing layer identification is provided in Sanhu area.

关 键 词：偶极横波成像测井 疏松砂岩 低电阻率 弹性参数 气层识别 敏感性 

分 类 号：P631[天文地球—地质矿产勘探]