摘要
地震吸收衰减分析及其用于油气检测一直是地震储层描述研究的热点领域,对于能否准确计算吸收衰减属性或Q值一直存在争议。为了考察地震吸收衰减及其预测含油气的可靠性,从反射地震振幅的影响因素和吸收衰减的黏弹性理论出发,进行能量衰减的分析和对比,结合实例进行讨论。结果表明:利用能量衰减可以用于含油气性预测的定性分析,但准确计算Q值,求取能量吸收衰减十分困难,只能计算一种等效吸收系数,定性表征相对衰减程度;进一步发展高精度采集技术、叠前资料处理方法和高分辨率时频数据分析算法,将有助于吸收衰减属性的计算和利用。
The analysis of the seismic-wave absorption and attenuation and its application in the hydrocarbon detection are always the hot research field in the seismic reservoir characterization and description,the accurate calculation of the absorption-attenuation attribute is still in the air. In order to inspect the seismic absorption-attenuation and the prediction reliability,from the viewpoints of the influencing factor of the seismic reflection amplitude and the viscoelasticity theory on the absorption-attenuation,the analysis and comparison of the energy attenuation were conducted,and integrated with the case study,the discussion was engaged. The achievements show that with the help of the energy attenuation,the qualitative analysis can be done to detect the hydrocarbon-bearing property,but the accurate calculation of Value Q and the seeking for the energy absorption-attenuation are rather difficult,only one kind of the equivalent absorbing coefficient can be calculated to qualitatively characterize the degree of the relative attenuation; so the following techniques i. e. high-precision acquisition,the processing method of the prestack data and the algorism of the high-resolution time-frequency data are needed to further develop so as to promote the calculation and adoption of the absorption-attenuation attribute.
作者
田晓红
TIAN Xiaohong(Exploration and Production Research Institute of Daqing Oilfield Co Ltd.,Daqing 163712,China})
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2018年第4期157-160,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
国家自然科学基金项目"页岩油气层及裂缝多尺度多物理正反演"(U1663207)
国家重大科技专项"陆相页岩油甜点地球物理识别与预测方法"(2017ZX05049-002)
关键词
Q值
振幅
吸收衰减
含油气预测
Value Q
amplitude
absorption and attenuation
hydrocarbon detection/prediction
