摘要
油田开发中后期建立在原小层对比和沉积微相基础上的储层地质模型已不能适应调整挖潜和剩余油分布研究的要求 ,需要在小层划分的基础上 ,进一步细分到岩相单元。本文以大庆长垣南部葡北油田葡I组油层为例提出岩相单元的概念 ,通过现代沉积研究论证岩相单元细分的可行性 ,结合密井网测井曲线分析旋回性、隔夹层分布的稳定性及目前经济技术和采油工艺等 ,探讨细分单元的基本原则。
During the middle or late stage of oil field development, reservoir geological model based on former minilayer division and sedimentary microfacies couldnot meet the demand of regulation tap the latent power and distribution of remaining oil. This demands minilayer division and further finely divides lithofacies. Lithofacies unit is bed or a single bed, formed during transportation and deposition of sediment, which formed under basically stable medium. It represents the smallest lithology unit composed of sediment with identical component. Bedded plane exists between beds, which represents intermittent plane of transient nondeposition or abrupt sedimentation. Lithofacies unit provides sedimentary foundation and new research way for further subdivision and reservoir anisotropy from static view. This paper proves feasibility of lithofacies unit subdivision by studying recent deposits and discusses the principle of finely divided unit, combining close spaced well to analyze cyclicity, stability of interbed, and propose economic technology and oil producing technology. At last, the paper provides basical method for finely dividing lithofacies unit.
出处
《沉积学报》
CAS
CSCD
北大核心
2002年第4期595-599,共5页
Acta Sedimentologica Sinica
基金
CNPC物探重点实验室资助项目
CNPC中青年创新基金资助项目
