摘要
于奇西地区三叠系上油组埋藏深,井控程度低,且为砂泥岩薄互层,储层物性变化大,储层与围岩在声波曲线上没有明显的差异,采用常规资料难以进行准确储层预测和评价。为此,在于奇西地区开展了反演方法储层预测研究。对各种反演方法进行了分析,认为基于重构技术的反演方法比较适应于奇西地区的特点。利用自然电位曲线重构了拟声波曲线,进行了伪波阻抗反演,获得了显著的地质效果,反演剖面清晰地描述了砂泥岩薄互层。利用反演结果,综合构造、沉积、油气成藏主控因素等信息,确定了上油组含油层①号砂体的分布范围和油气有利分布层段。
The upper oil unit in the Tertiary oil reservoirs in Yuqixi area is characterized by deep buried depth,poor well control,thin sand shale interbed,significant variation in physical properties,and no obvious difference between the reservoirs and adjacent rocks on a coustic wave logging curves.So it is difficult to accurately predict and evaluate the reservoirs with conventional data.In order to solve this problem,a study is performed on methodology of reser- voir prediction through inversion in Yuxiqi area.Analysis of vari- ous inversion methods shows that reconstruction-based inversion method is applicable in Yuxiqi area.Pseudo-acoustic curve was re- constructed by SP curve for inversion of pseudo-acoustic imped- ance.Good geologic effects were achieved,and the thin sand-shale interbeds are clearly defined on inversion sections.The distribution of No.1 sandbody and the favorable oil/gas reservoir intervals in the upper oil unit are identified by using the inversion results with the information of structures,sedimentary facies,and the main control factors of hydrocarbon accumulation.
出处
《石油物探》
EI
CSCD
2008年第2期186-190,共5页
Geophysical Prospecting For Petroleum
关键词
于奇西地区
三叠系
砂泥岩薄互层
重构技术
拟声波曲线
伪波阻抗反演
Yuqixi area
Tertiary
thin sand-shale interbed
reconstruction technique
pseudo-acoustic curve
pseudo-acoustic impedance inversion
