摘要
扇三角洲是断陷盆地斜坡带重要的油气储层类型,岩性复杂,沉积相带横向变化快,井间沉积相表征难。选取发育典型扇三角洲沉积的辽河东部凹陷斜坡带铁匠炉地区,开展地震反射等时性分析和多属性融合的沉积相地震表征。研究发现:1)斜坡带扇三角洲沉积区存在局部地震反射“穿时”现象,分频倾角差分析能识别显著的穿时地震反射。2)均方根振幅、能量半时和振幅不对称性属性包含了砂岩发育程度和岩性组合信息,对三者进行RGB融合,可为少井区沉积相地震表征提供简便且有效的方法。3)研究区发育北物源的两个大型扇三角洲和东南物源的一个小型扇三角洲,目前勘探开发主要集中在北物源扇三角洲储层。研究为斜坡带扇三角洲沉积相地震表征提供了有效方法,为研究区下一步勘探提供了方向和目标。
Fan delta is an important type of oil and gas reservoir in slope zone of faulted basin.Lithology and sedimentary facies vary laterally.It is difficult to characterize sedimentary facies distribution inter-wells.A typical fan-delta deposition at Tiejianglu Area in the gentle slope zone of the eastern Liaohe Sag is studied.i.Two work are carried on including isochronicity analysis of seismic reflection,and seismic characterization of sedimentary facies with multi-attributes fusion.The study reveals:1)in fan delta deposition area,there are diachronous seismic events locally and frequency division dip difference analysis can identify significant diachronous seismic reflection;2)the root mean square amplitude,energy half-time and skew in amplitude attributes contain the information of sandstone development degree and lithologic combination.RGB fusion of the three attributes provides a simple and effective method for seismic characterization of sedimentary facies in sparse-borehole areas;3)in study area,there developed 3 fan deltas including 2 large fan deltas of north provenance and a small fan delta of southeast provenance.At present,the exploration and development are concentrated on the fan deltas of north provenance.This study provides an effective method for seismic characterization of fan delta sedimentary facies in gentle slope zone,and provides direction and target for further exploration in the study area.
作者
黄德榕
张宪国
王友净
蔡国钢
解宝国
HUANG Derong;ZHANG Xianguo;WANG Youjing;CAI Guogang;XIE Baoguo(PetroChina Research Institute of Petroleum Exploration&Development,Haidian,Beijing 100083,China;Shandong Key Laboratory of Deep Oil and Gas,Qingdao,Shandong 266580,China;Research Institute of Exploration and Development,Liaohe Oilfield Company,CNPC,Panjin,Liaoning 124010,China)
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2023年第3期14-28,共15页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家自然科学基金(42172144)。
关键词
扇三角洲
斜坡带
辽河东部凹陷
地震沉积学
多属性融合
fan delta
slope belt
eastern Liaohe Sag
seismic sedimentology
multi-seismic attributes fusion
