摘要
根据八区下乌尔禾组油藏具有巨厚、特低渗、砾岩沉积、开发效果差的特点,需要对油藏进行分层开发。由于无发育的泥质岩作为标志层,而不易进行地层划分与对比。运用能谱测井中Th、U、K含量的变化明确反映了地层沉积环境的变迁的特征,进行地层划分与对比,把八区下乌尔禾组地层划分为5个段、11个亚段,开拓了砾岩地层剖面准确划分对比的新思路和新方法,实现了油藏分层开发,钻新井600多口,当年产油达到108×104t的显著效果。
As the conglomerate reservoir of P2w1 is characterized by great burial depth,extremely-low permeability,and poor development effect,the reservoir needs to be developed from different layers.But since there is no mud rock developed as the marker bed,it is difficult to conduct stratigraphic classification & correlation.The variation of Th,U and K content in in-hole spectrometry logging could definitely reflect the changes of the formation sedimentary environment and could be used to carry out stratigraphic classification & correlation.Therefore,Lower Wu'erhe(P2w1)Reservoir,District No.8,Karamay Oilfield was classified into 5 units,11 subunits.The application of Gamma-ray logging & in-hole spectrometry logging in stratigraphic classification & correlation establishes a new idea and new method in stratigraphic classification & correlation of conglomerate layer,provids technical support for oilfield development.By using this method,the reservoir is developed in layers,and more than 600 wells are drilled,as a result,the annual production is as high as 108×104 tons.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2008年第2期471-473,共3页
Journal of Oil and Gas Technology
关键词
地层对比
地层划分
自然伽马
能谱测井
特低渗
massive thickness
conglomerate
in-hole spectrometry logging,stratigraphic classification
