薄水泥环套管井碳酸盐岩地层中合成波形分析  

Analysis of Synthetic Acoustic Waveforms in a Cased Borehole with Thin Cement Annulus Bedded in Carbonate Strata

作　　者：章成广[1,2] 周继宏[1,2] 顾伟康 

机构地区：[1]江汉石油学院地球物理勘探系 [2]塔里木勘探开发指挥部勘探处

出　　处：《江汉石油学院学报》1998年第3期36-40,共5页Journal of Jianghan Petroleum Institute

摘　　要：针对碳酸盐岩地层的薄水泥环套管井情形，计算了声波合成波形，着重讨论了一界面和二界面流体环隙宽度变化的声波波形特征。合成波形及其频谱分析表明：套管波幅度、地层波幅度和波列后续波的持续时间均与流体环隙宽度有关。因此，利用套管波幅度和界面波持续时间等特性可估计流体微环宽度，利用界面波幅度和频率特性及其波列持续时间可作为固井质量评价的特征量。Synthetic acoustic waveforms in a cased borehole with thin cement annulus bedded in carbonate strata are calculated.Their characteristics are analyzed, with varying thickness of the liquid annulus existing between the casing and cementor as well as between the cement and strata The results show that the thickness of liquid annulus may be estimated by using the amplitude of the casing arrival and lasting time of the guided waves, and the amplitude, frequency and lasting time of the guided waves are used as a characteristic quantity for evaluating the cement bonding

关 键 词：声波测井 碳酸盐岩 油气藏 固井质量 波形分析 

分 类 号：TE256[石油与天然气工程—油气井工程] P631.814[天文地球—地质矿产勘探]