地震子波分解与重构技术在薄储层预测中的应用
Application of seismic wavelet decomposition and reconstruction technology in thin reservoir prediction
何幼娟 1马洪涛 1邓锋 1孙力 1羊丹 2汪勇 2金燕 3林格4
作者信息
- 1. 中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐 830011
- 2. 长江大学地球物理与石油资源学院,湖北武汉 430100;油气资源与勘探技术教育部重点实验室(长江大学),湖北武汉 430100
- 3. 中国石化中原油田分公司勘探开发研究院,河南濮阳 457001
- 4. 中国石油长庆油田分公司第三采气厂,陕西西安 710018
- 折叠
摘要
T813K-TK715井区是塔河油田的重点含油气井区,多口井在石炭系油气显示活跃,但砂体展布不明.在地震资料上,T813K-TK715井区储层响应特征不明确,且石炭系卡拉沙依组不整合面强反射屏蔽下伏储层反射信息,使得剥蚀线附近地层圈闭难以刻画.文中结合工区地质特征,建立二维地震和楔状地层模型,应用正演模拟技术得到正演模拟结果,利用子波分解与重构技术对正演模拟结果进行处理.结果表明:子波分解与重构技术有效压制了石炭系卡拉沙依组不整合面强反射,削弱了其对下伏砂体反射的屏蔽作用,增强了地层底部反射的连续性,并且提高了地震剖面识别尖灭点的精度,为塔河油田T813K-TK715井区识别强反射屏蔽背景下的薄砂体及地层尖灭点提供了新思路及技术支撑.
Abstract
The T813K-TK715 well area is a key oil-bearing well area in Tahe Oilfield,and oil and gas display actively in many wells in the Carboniferous,but the sand body distribution is unknown.As shown by seismic data,the reservoir response characteristics are unclear,and the strong reflection of Carboniferous Karashayi Formation unconformity shields the reflection information of the underlying reservoir,which makes it difficult to describe the stratigraphic trap near the erosion line.Combined with the geological characteristics of the working area,two-dimensional seismic and wedge-shaped strata models are established,forward simulation technology is applied to gain forward simulation results,and the obtained forward simulation results are handled by wavelet decomposition and reconstruction technology.The results show that the wavelet decomposition and reconstruction technology effectively suppresses the strong reflection of Carboniferous Karashayi Formation unconformity,weakens its shielding effect on the reflection of the underlying sand body,enhances the continuity of the reflection at the bottom of the strata,and improves the accuracy of the seismic profile identification of the pinch-out point,which provides a new idea and technical support for identifying the thin sand body and the stratum pinch-out point in the background of strong reflection shielding of the T813K-TK715 well area in Tahe Oilfield.
关键词
子波分解与重构/正演模拟/尖灭点识别/卡拉沙依组Key words
wavelet decomposition and reconstruction/forward simulation/pinch-out point identification/Kalashayi Formation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据