摘要
塔北隆起却勒—羊塔地区古近系底砂岩段发育一套扇三角洲前缘砂、泥薄互层储层,通过对薄互层储层的钻井岩芯、录测井分析,探讨了常规曲线分频分量的储层地质含义,优选了薄互层岩性敏感曲线和地层平均速度敏感曲线。在曲线预处理、标准化处理等前提下,利用小波分频分解的原理和方法,分频提取储层岩性敏感伽马曲线的中频分量和地层平均层速度敏感声波曲线的低频分量。统计回归,建立伽马曲线与声波曲线的转换模型,模型法将伽马曲线转换为声波曲线量纲。小波分频重构融合伽马曲线中频分量和声波曲线低频分量信息,构建具有声波量纲的拟声波曲线。利用拟声波曲线约束地震反演,提高地震频带宽度和地震资料分辨率,预测了薄互层砂岩的分布区,薄层砂岩主要分布于北部的QL1井和东部的YT5井附近。
In Quele-Yangta Area of Tabei Uplift, the Palaeogene lower sand section is fan-delta front facie and the strati- graphic is sand-shale thin interbedded reservoirs. In this paper, we analyzed the core and logging of thin interbedded reservoirs, discussed the geology significance of the reservoir by different curve frequency division component, and optimized the thin interbedded reservoirs lithology sensitive logging and stratigraphic average velocity sensitive logging. On the basis of curve foreprocessing and normalization, we exteacted the middle frequency component of reservoirs lithology sensitive logging（GR）, and the low frequency component of stratigraphic average velocity sensitive logging （Dr）, with the principle of wavelet frequency division and decomposition. Based on the Statistic method of the statistic regression. Based on the method of the statistic regression, the transformation model with GR-DT curve was established, and this statistical model will converse GR curve to DT curve dimension. According to the technology of wavelet logging frequency division reconstruct, we construct quasi acoustic logging combined with the middle frequencies GR curves information and low frequencies acoustic logging information, which are extracted by wavelet decomposition. Using quasi acoustic logging constraint seismic inversion, the inversion methods can improve seismic resolution and frequency band, and the inversion impedance results predict the thin interbedded reservoir sand is mainly distribute in the north of the research area near Well QL1, and distribute in the east of the research area near Well YT5.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第4期47-54,共8页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家科技重大专项"大型油气田及煤层气开发"(2008ZX05004–002)
关键词
却勒—羊塔地区
薄互层储层
敏感性分析
分频重构
拟声波反演
Quele-Yangta Area
thin interbedded reservoir
sensitivity analysis
frequency division reconstruction
quasiacoustic inversion
作者简介
赵继龙，1981年乍，男，汉族，山东临沂人，工程师，硕士，主要从事地震储层预测方面的研究。E—mail：zhaojl_hz@petrochina．com．cn
熊冉，1983年生，男，汉族，湖北天门人，硕士，主要从事地震储层预测工作。E—mail：xion．grhz@petrochina．com．cn
陈戈，1980年生，男，汉族，重庆人，硕士，主要从事油气储集层地质与油气藏描述等研究工作。E-mail：cheng_hz@petrochina．com．cn
王俊鹏，1983年生，男，汉族，河北石家成人，工程师，硕士，主要从事沉积储层研究等工作。E—mail：wangjp_hz@petrochina．com．cn
刘玲利，1984年生，女，汉族，湖北天门人，硕士，主要从事地震储层预测等工作。E—mail：liull_hz@petrochina．com．cn
