摘要
随着石油勘探类型的转变和发展,如何高效且准确地识别地层中的裂缝变得十分重要.本文构建了斯通利波在裂缝地层中传播的理论模型,得到了斯通利波在经过裂缝带时会形成反射斯通利波,以及地层中裂缝的条数越多、斯通利波反射系数越大的理论结果.在此基础上,对辽河盆地火成岩地层的声波测井数据进行了斯通利波波场分离(中值滤波),得到反射斯通利波,并计算了裂缝地层的反射系数.同时对该地层的电成像测井数据进行了孔隙度分布谱和区间孔隙度分析.研究表明:在裂缝发育的地层,反射斯通利波能量增强,反射系数变大;裂缝发育地层电成像孔隙度分布谱明显变宽,电成像区间孔隙度中大孔隙占比增大,显示次生孔隙(裂缝)发育.
With the change and development of petroleum exploration types,it becomes very important to identify fractures in the formation efficiently and accurately.In this paper,a theoretical model of Stoneley wave propagation in fractured formation is constructed,and the results show that the reflection coefficient of Stoneley wave is higher when the Stoneley wave passes through the fractured zone.On this basis,Stoneley wave field separation(median filtering)is performed on the acoustic logging data of igneous formation in Liaohe basin,the reflected Stoneley wave is obtained,and the reflection coefficient of fractured formation is calculated.At the same time,the porosity distribution spectrum and interval porosity of the formation are analyzed based on the electrical imaging logging data.The results show that both the energy of the reflected Stoneley wave and the reflection coefficient increase in the fractured formation;The distribution spectrum of electrical imaging porosity is significantly wider,and the proportion of large pores in the electrical imaging interval porosity increases in the fractured formation,which indicats the development of secondary pores(fractures).
作者
崔裔曈
王祝文
徐方慧
韩锐羿
齐兴华
Cui Yitong;Wang Zhuwen;Xu Fanghui;Han Ruiyi;Qi Xinghua(College of GeoExploration Science and Technology,Jilin University,Changchun130026,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2022年第2期624-632,共9页
Journal of Jilin University：Earth Science Edition
基金
国家自然科学基金项目(41874135)。
关键词
火成岩裂缝地层
斯通利波
电成像测井
孔隙度谱分析
中值滤波
igneous fractured formation
Stoneley wave
electrical imaging logging
porosity spectrum analysis
wave-field separation
