基于改进广义S变换时频分析的"板状"断控油藏油柱高度预测
Prediction of oil column heights in fault-controlled tabular reservoirs through time-frequency analysis based on improved generalized S-transform
袁晓满 1李相文 2张洁 1但光箭 3卢忠沅 1韩重阳 3张磊 3许建洋3
作者信息
- 1. 中国石油集团 塔里木油田公司哈得采油气管理区,新疆 库尔勒 841001
- 2. 中国石油集团 东方地球物理勘探有限责任公司研究院,新疆 库尔勒 841000;中油奥博(成都)科技有限责任公司,四川 成都 611730
- 3. 中国石油集团 东方地球物理勘探有限责任公司研究院,新疆 库尔勒 841000
- 折叠
摘要
塔里木盆地北部坳陷碳酸盐岩断控领域油气资源丰富.断控"板状"油藏油水界面的识别是该类油藏效益开发的关键工作.钻井探测油藏油水界面的成本高、工程实现难度大,而采用地球物理的方法识别油水界面是一种高效措施.文章提出一种基于广义S变换时频分析的应用方法,通过大量过井地震道时频分析结果与开发动态分析数据联合分析,发现地震资料主频随深度/时间的变化与油层厚度具有正相关关系,提出采用地震道时频道集能量包络异常拐点判别油水界面的思路.实验表明,针对"板状"油藏,当油柱厚度OCH<120 m时,分析结果存在不确定性;当 120≤OCH≤250 m时,分析结果基本可靠;当OCH>250 m时,油层厚度可靠.应用表明,在富满油田某区某断裂破碎带预测油层厚度主体为 200～520 m,与当地开发实际相符,可指导开发实践.
Abstract
The fault-controlled carbonate area in the northern depression of the Tarim Basin possesses abundant oil and gas resources.Identifying the oil-water contact(OWC)of fault-controlled tabular reservoirs is critical for their effective exploitation.However,OWC i-dentification through drilling is costly and challenging.In contrast,it is efficient to identify the OWC using geophysical methods.This study proposed a time-frequency analysis method based on generalized S-transform.As revealed by the joint analysis of extensive time-frequency analysis results of through-well seismic channels and production performance analysis data,the depth/time-varying main fre-quency of seismic data is positively correlated with the oil layer thickness.Hence,this study proposed to identify the OWC using the ab-normal inflection point of the energy envelope of seismic channel time-frequency gather.Experimental results demonstrate that oil layer thickness results obtained are uncertain,generally reliable,and reliable in the case of oil column height(OCH)<120 m,120 m≤OCH≤250 m,and OCH≥250 m,respectively.The method proposed in this study was applied to a fault fracture zone of an area of the Fu-man oilfield,obtaining the main predicted oil layer thicknesses between 200 m and 520 m,aligning with the actual exploitation results.Therefore,the method of this study can be employed to guide exploitation.
关键词
断裂破碎带/断控油藏/油层厚度/地震探测/时频分析/塔里木盆地Key words
fracture zone/fault-controlled reservoir/oil layer thickness/seismic survey/time-frequency analysis/Tarim Basin引用本文复制引用
基金项目
国家重点研发计划(2020YFA0713404)
东方地球物理公司重点科研项目(03-02-2022)
出版年
2024
国家科技期刊平台
NSTL
万方数据