摘要
针对雁木西油田白垩系低阻油层受沉积相带及其断裂、构造和岩性等多种因素控制影响,测井信息应用难度增大的特点,采用地层倾角测井资料确定古水流方向、砂体延伸、层理构造和微相特征。利用倾角方位频率矢量统计,确定出白垩系K1s3、K1s2、K1s1目的层段古水流及其相应河道砂体延伸方向为北北东20°。利用层理构造倾角模式分析,确定出白垩系K1s3、K1s2、K1s1期分别发育楔状交错层理、波状斜层理、波状交错层理和水平层理,结合岩心、井径、自然伽马和微侧向电阻率曲线特征,分别阐明白垩系K1s3、K1s2到K1s1期水动力能量由较高到较低变化,形成了扇三角洲前缘扇中的水下辫状河道到扇端的浅水河道有利微相砂体发育带,由南南西向北北东方向展布,控制研究区最为有利的油气储集砂体分布。
To aim at the characteristics that low resistivity reservoirs of Yanmuxi oilfield are influeced by the sedimentary faces, fault, structure and lithology and the application of logging data becomes more difficult, dip logging data is adopted to determine paleocurrent direction, sand body extension, stratification structure and microfacies characteristics. By the Statistics of dip orientation, we identified the direction of paleocurrent of K1s3, K1s2 and K1s1 and their palaeo-channel sedimentary sand orientation was NNE 20°. By using the analysis of stratification structure model, cross bedding pattern, current bedding and flat bedding had been developed in the Cretaceous of all the above layers. Combined with core, CAL, GR, and MLL Characteristic curve, the flow rate changing of the palaeo-channel is made clear, which is from higher to lower. Beneficial sedimentary sand area of microfacies from under water braided channel in delta front to shallow channel on the distal end has been generated. The orientation of sedimentary sand is in south-southwest to north-northeast, which controls the distribution of the best reservoir sand in this area.
出处
《断块油气田》
CAS
北大核心
2009年第4期4-7,共4页
Fault-Block Oil & Gas Field
基金
国家自然科学基金项目"基于核向量机的油藏历史拟合代理模型研究"(40872087)资助
关键词
地层倾角测井
方位频率矢量
层理构造倾角模式
古水流方向
河道砂体延伸方向
有利微相砂体发育带
dip logging, directional frequency vector, bedding structure angel model, paleocurrent direction, channel sedimentary sand orientation, beneficial sedimentary sand area
作者简介
宋子齐，男，教授，享受国务院特殊津贴科技专家，1968年毕业于成都理工大学应用地球物理专业，主要从事油气储层研究、测井解释及油藏剩余油分布的教学和科研工作。电话：（029）88383867，E-mail：songziqi0827@126．com。
