金湖凹陷三河地区戴南组岩性解释及AVO正演模拟分析  

Lithology Interpretation and AVO Forward Modeling Analysis of Dainan Formation in Sanhe Area of Jinhu Sag

作　　者：荆鑫[1] 毛宁波[1] 

机构地区：[1]长江大学地球物理与石油资源学院,湖北武汉430100

出　　处：《长江大学学报（自科版）（中旬）》2016年第4期41-45,共5页Journal of Yangtze University(Nature Science Edition)

摘　　要：随着金湖凹陷油气勘探难度的不断加大,如何提高勘探的精度成为一个亟待解决的问题。金湖凹陷三河地区古近系戴南组(E_2d)勘探程度较低,却是金湖凹陷最具勘探潜力的目的层,但缺乏成熟理论作为指导,地震波传播规律不清楚,地下地质体地震响应特征不明确,成为金湖凹陷E_2d隐蔽型圈闭识别的制约因素。地震正演模拟技术可以用来研究地震波传播规律和明确地下地质体的地震响应特征,是提高勘探精度的有效途径。同时,砂泥岩的划分对油气的找寻也十分关键,明确砂泥岩区分的敏感参数可为正演研究提供参数依据,而测井资料岩性解释与岩石物理分析可以很好地进行地层砂泥岩分析。基于金湖凹陷三河地区的测井、钻井及地质资料,通过上述方法评价了该区的岩性及地震响应特征,为后续勘探工作提供了可靠资料。With the continuous increasing of difficulty in hydrocarbon exploration in Jinhu Sag,it was an urgent problem how to improve the accuracy of exploration.The prospecting degree was low in Paleogene Danan Formation(E_2d)of Sanhu Area in Jinhu Sag,but it was the target zone with the most potentiality of oil exploration.Subtle trap identification of Dainan Formation was restricted as lacking of mature theory as a guide,and having no clear understanding of seismic wave propagation as well as seismic response characteristics of geological body.Nevertheless,seismic wave forward modeling technique could be used to clarify the rules of seismic wave propagation and the seismic response characteristics,it was an effective way of improving the accuracy of seismic exploration.At the same time the identification of sandstone and mudstone was critical for looking for oils,clarifying the sensitive parameters between sandstone and mudstone provided a basis for forward simulation.The lithological interpretation and petrophysical analysis of logging data could analyzing the sand shale better.Based on the data of logging,drilling and geological data in Sanhu Area,the lithological property and seismic response characters in the area are evaluated,it provides reliable data for subsequent exploration.

关 键 词：岩性解释 岩石物理 正演模拟 金湖凹陷 

分 类 号：P631.44[天文地球—地质矿产勘探]