MAK-Ⅱ声波测井资料在定量评价固井质量中的应用  

Application of MAK-ⅡLog Data to Cement Bond Quantitative Evaluation

作　　者：唐军[1,2] 章成广[1,2] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023 [2]长江大学地球物理与石油资源学院,湖北荆州434023

出　　处：《测井技术》2011年第3期266-269,共4页Well Logging Technology

摘　　要：传统利用MAK-Ⅱ测井数据进行水泥固井质量评价时,由于水泥胶结情况差异及衰减系数受到套管尺寸、地层特性的影响,使定量评价困难。为充分利用波形数据,实现定量评价水泥胶结Ⅰ、Ⅱ界面的目的,结合原有的声波时差、幅度衰减以及衰减率曲线,建立了定量计算Ⅰ、Ⅱ界面的胶结指数公式,并根据刻度井测量数据建立定量评价水泥胶结质量的标准。利用套管波幅度建立的Ⅰ界面胶结指数可用于定量评价水泥胶结质量,但要考虑扇形窜槽角度、水泥密度以及井眼等因素的影响;地层波信息可用于评价水泥与地层的胶结质量;通过计算其频域内的能量可建立Ⅱ界面定量评价指数。刻度井以及实际井的处理情况表明该方法可行。Quantitative cement bond evaluation using MAK-Ⅱ logging data generally is unsatisfac- tory due to difference in cement bond situation and influence of attenuation coefficient from case size and formation property, etc. In order to quantitatively evaluate the I and Ⅱ interface of cement bond with wave form data, a formula is set up to calculate it by combining original interval transit time, amplitude fading and attenuation ratio curves. And the quantitative cement bond quality evaluation standard is established based on measuring data of calibration wells. It is be- lieved that the I interface bond index based on casing wave amplitude can be used to quantitatively evaluate the cement bond quality, but we should consider the influence of channeling angle, ce- ment density and borehole, et al. Formation wave information can be used to evaluate bond quali- ty between cement and formation. The Ⅱ interface bond index can be built by calculating energy in frequency domain. Practical application in the calibration wells and production wells show that this method is feasible.

关 键 词：测井评价 固井质量 定量评价 胶结指数 

分 类 号：P631.84[天文地球—地质矿产勘探]