太平油田馆陶组下段辫状河储层地震反射假象分析
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摘要
太平油田位于义和庄凸起北坡东部,主要含油层为馆陶组下段发育的辫状河储层。河流相频繁的决口、改道及辫状河流相砂体发育位置和砂体空间配置关系的特殊性,使得其在地震剖面上产生了反射假象,从而使对辫状河储层层位的追踪及砂体的描述变得异常困难。从馆陶组下段辫状河储层的发育特征及地震观测因素出发,阐述了馆陶组下段辫状河地震反射假象产生的原因。提出了利用地震资料分频解释技术和设计多井约束反演可较为准确地识别辫状河储层的反射假象。
Taiping Oilfield lies in the east of north slope of Yihezhuang Uplift. Braided stream reservoirs in lower Guantao Formation are the main oil-bearing formations in the oilfield. Frequent crevasse and diversion of fluvial facies and the particularity of development position and space matching relation of sandbody of braided stream facies result in false appearance of reflection in seismic profile. So the identification of reservoir horizon and the description of sandbody in braided river become very difficult. We explain the false appearance of seismic reflection from the characters of braided river reservoir and factors of seismic observation of the braided stream in lower Guantao Formation. Application of frequency division interpretation technique of seismic data and multiwell constrained inversion can identify the false appearance of the reflection in the braided river reservoirs.
Taiping Oilfield lies in the east of north slope of Yihezhuang Uplift. Braided stream reservoirs in lower Guantao Formation are the main oil-bearing formations in the oilfield. Frequent crevasse and diversion of fluvial facies and the particularity of development position and space matching relation of sandbody of braided stream facies result in false appearance of reflection in seismic profile. So the identification of reservoir horizon and the description of sandbody in braided river become very difficult. We explain the false appearance of seismic reflection from the characters of braided river reservoir and factors of seismic observation of the braided stream in lower Guantao Formation. Application of frequency division interpretation technique of seismic data and multiwell constrained inversion can identify the false appearance of the reflection in the braided river reservoirs.
引文
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[4]赖克内HE,辛格I B.陆源碎屑沉积环境[M].陈昌明,李继亮,译,北京:石油工业出版社,1979.
[5]廖保方,张为民,李列,等.辫状河现代沉积研究与相模式———中国永定河分析[J].沉积学报,1998,16(1):34-39.
[6]王永诗,石砥石.济阳坳陷新近系地层油藏特征———以太平油田为例[J].油气地质与采收率,2006,13(1):44-46.
[7]王广利,朱日房,陈致林,等.义和庄凸起及其北部斜坡带油气运聚研究[J].油气地质与采收率,2001,8(4):12-14.
[8]于兴河.碎屑岩系油气储层沉积学[M].北京:地质出版社,2002.
[9]刘波,赵翰卿,李广月,等.储层砂质辫状河的识别———以大庆喇嘛甸—萨尔图油田西部PI23为例[J].石油学报,2002,23(2):43-47.
[10]裘怿楠.储层地质模式[C]//石油科技论文集.北京:石油工业出版社,1990.
[11]赵霞飞.河流相模式与储层非均质性[J].成都理工学院学报,1999,26(4):357-364.
[12]伍涛,杨勇,王德发,等.辫状河储层建模方法研究[J].沉积学报,1999,17(2):258-262.
[13]于建国,韩文功,王金铎,等.陆相断陷盆地砂岩储层横向预测[M].北京:石油工业出版社,2002.
[14]于兴河,马兴祥,穆龙新,等.辫状河储层地质模式及层次界面分析[M].北京:石油工业出版社,2004.
[15]曹统仁.地震资料解释预储层横向预测[J].西南石油学院学报,1997,19(4):20-26.
[16]陈桂华,刘志斌.应用反演技术研究BZ26-2油气田馆陶组沉积特征[J].中国海上油气:地质,2001,15(3):176-181.
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