摘要
用高分辨率层序地层学原理解决油藏开发中的地层划分与对比问题在近几年得到广泛应用,河流相地层基准面旋回的识别、划分及储层细分对比一直是该项研究的难点,主要源于各种自旋回的干扰。从分析河流相构成与基准面旋回的关系出发,探讨了依据河型与河道砂体叠置样式变化、相序与相组合、自旋回特征及冲积平原特征等河流相结构要素进行河流相基准面旋回识别的方法。在基准面旋回等时格架约束下的储层细分对比中,提出要依据自旋回特征识别基准面旋回变化趋势,将短期旋回(自旋回)纳入较长期高级别旋回(基准面旋回)中分层次逐级对比。根据基准面旋回过程中河道砂体的结构类型、叠加样式和相对保存程度的规律性,归纳了不同可容空间条件下河道砂体的对比模式,用以指导河流相储层的细分对比。
As one of the most foundational and important matters in the study of oil-gas reservoir development engineering, the high resolution sequence stratigrapy analysis is a key technique, and the division and correlation of fluvial stratum is one of the most difficult problems for the disturbing of autocyclicity. In this paper, the authors analyze the relationship between the composition elements of fluvial stratum and the processions of the cycle. Four identifying patterns of the base level cycle in fluvial facies are generalized, including the channel shape and overlying pattern, facies sequence and association, the feature of autocyclicity, the feature of fluvial plain. It has been suggested that the correlation of short-term cycle must be based on the tendency of the longterm cycle. The authors also analyze the relationships among the overlying pattern, the retention grade of the sandbodies and the A/S in the processions of the cycle.
出处
《现代地质》
CAS
CSCD
北大核心
2009年第5期963-967,共5页
Geoscience
基金
国家重大专项"滩海油气田高效开发技术"项目(2008zx05000-015)
关键词
油藏开发
河流相
基准面旋回
储层细分对比
reservoir development
fluvial facies
base level cycle
reservoir subdivision and correlation
