自然伽马及能谱测井在特低渗巨厚砾岩油藏地层划分与对比中的应用——以二叠系八区下乌尔禾组油藏为例  

Application of Gamma-ray Logging & In-hole Spectrometry Logging in Stratigraphic Classification & Correlation of megasequence of Conglomerate Reservoirs

作　　者：吕文新[1] 金萍[1] 张建英 

机构地区：[1]新疆油田分公司采油二厂,新疆克拉玛依834008 [2]新科澳化工有限公司,新疆克拉玛依834008

出　　处：《石油天然气学报》2008年第2期471-473,共3页Journal of Oil and Gas Technology

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.

关 键 词：地层对比 地层划分 自然伽马 能谱测井 特低渗 

分 类 号：P618.13[天文地球—矿床学]