摘要
在河流相储层中,砂体叠置现象非常普遍,砂体单层厚度相对较薄,横向变化复杂,受地震资料分辨率所限及断层发育的影响,砂体边界不易识别,增加了河流沉积砂体的储层预测难度。在前人研究的基础上,首先建立河流相沉积砂体叠置模型,正演分析叠置砂体在地震记录上的波形强弱、尖锐度、稳定性、对称性变化特征以及同相轴的连续性;其次通过模型验证在一个周期时窗上提取波形结构属性的有效性,并提出利用波形结构属性识别砂体叠置区的方法;最后应用实际资料,验证了基于波形结构属性识别砂体叠置区方法的可行性。
The phenomenon of sand-body superimposition is commonly seen in the fluvial facies reservoirs where the sand-body has thin single-layer thickness and complex lateral variation.Limited by seismic resolution and the influence of fault development,it is not easy to identify the sand-body boundary,which increases the difficulty in the reservoir prediction of fluvial sedimentary sandbody.Based on previous research,the model of fluvial sedimentary sand-body superimposition is set up firstly for forward analysis on the seismic records of superimposed sand-body,such as the changes in waveform strength,sharpness,stability and symmetry as well as the continuity of event.Then,the model is used to validate the effectiveness of waveform structure attributes extracted from a time window of a period.Meanwhile,this study also proposes the method of applying waveform structure attributes to identify sand-body superimposed area.Finally,the feasibility of such method is verified by practical application.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2018年第7期792-801,共10页
Acta Petrolei Sinica
基金
国家科技重大专项(2016ZX05025-001-001)
中国海洋石油有限公司科技外协项目(CCL2016RCPS0110RSN)资助
关键词
地震波
河流相
叠置砂体边界
波形结构属性
时窗
seismic wave
fluvial facies
superimposed sand-body boundary
waveform structure attributes
time window