摘要
潜江凹陷蚌湖向斜周缘为典型的内陆盐湖沉积,油气资源丰富,是岩性油藏勘探的有利地区。该区纵向上岩性组合复杂,横向砂体变化快,砂岩储层与非储层的波阻抗值相近,应用地震属性分析和叠后波阻抗反演等方法难以准确识别储层。通过多年的攻关研究,提出了以高保真叠前偏移地震资料为基础,以叠前同步密度反演为核心的相控储层预测技术,并重点介绍了叠前同步密度反演中的横波速度估算、叠加角度的划分及流体检测等关键技术。勘探实践表明这些技术是可行的,能有效地识别岩性圈闭,具有较好的推广应用前景。
The Banghu Syncline in Qianjiang Sag with abundant oil and gas resources is a typical inland lake by salt deposit. It is the favorable area for lithologic reservoir exploration. Because of complex vertical lithology combination, quickly lateral change of sand bodies, impedance of reservoir and non reservoir laminated obviously, it is difficult to identify the reservoir just by seismic attribute analysis and post-stack acoustic impedance inversion. Through many years of research, this paper put forward facies controlled reservoir prediction technology with high-fidelity pre-stack migration seismic data as a foundation, and the pre-stack simultaneous inversion of density as the core, and discussed the key technologies in pre-stack simultaneous inversion of density such as shear wave velocity estimation, stacked angels division and fluid detection. Practice proved that these exploration techniques are feasible, and they could be effectively used to identify lithologic traps and have great application prospects.
出处
《岩性油气藏》
CSCD
2014年第5期86-90,共5页
Lithologic Reservoirs
基金
中国石化股份公司科研项目"盐湖盆地复杂岩性油藏滚动勘探开发技术研究"(编号:2014050)资助
关键词
叠前时间偏移
叠前同步反演
横波预测
角度叠加
密度预测
流体检测
pre-stack time migration
pre-stack simultaneous inversion
S-wave prediction
angle stack
density prediction
fluid detection
