摘要
四川盆地白云岩储层普遍发育,勘探潜力巨大,但是由于其复杂性,导致储层预测极其困难。针对这种情况,开展地震正演模拟方法研究白云岩储层的地震响应特征进而指导储层预测是十分必要的。某地区二叠统栖霞组白云岩储层地震响应不清,为了厘清储层的地震响应特征,结合已知钻井情况,建立了不同的地质正演模型来研究储层的地震响应。通过分析正演模拟结果得到:在下伏为高速地层时,储层的地震响应为弱波峰反射;在下伏为低速地层时,储层的响应特征受下伏地层影响,表现为波谷反射,但是在消除下伏地层影响后储层响应仍表现为弱波峰反射特征。同时,结合地震多属性和高精度地震反演,综合预测白云岩储层的发育情况。地震正演模拟方法为研究白云岩储层地震响应特征提供了一定的依据,同时也为白云岩储层的进一步研究提供了手段。
The dolomite reservoir,with huge prospecting potential,is widespread in Sichuan basin.Due to various reasons,the prediction of dolomiet reservoir is extremely difficult.In order to guide reservoir prediction,this paper introduces forward modeling to study the seismic response of dolomite reservoir.The seismic response of Permian Qixia dolomite reservoir is not clear.In order to clarify the seismic response characteristics,the authors constructed different forward models in combination with the situation of drilling.The analysis of forward modeling results shows that,on the one hand,reservoir seismic response is weak wave reflection when the underlying strata are high-speed formation and,on the other hand,the response characteristics of the reservoir are influenced by the underlying strata,featured by trough reflection,but still show the weak wave reflection after eliminating the influence of the underlying strata of low speed formation.Meanwhile,the authors combined seismic attributes and high resolution seismic inversion to predict dolomite reservoir. The forward modeling provides a basis for studying seismic response characteristics of dolomite reservoirs and also serves as a means for further study of the dolomite reservoir.
作者
张强
王鑫
乐幸福
张建新
ZHANG Qiang;WANG Xin;LE Xing-Fu;ZHANG Jian-Xin(Research Institute of Petroleum Exploration ＆ Development-Northwest,PetroChina,Lanzhou 730030,China;PetroChina Research Institute of Petrole-um Exploration ＆ Development Research Center of Sichuan Basin,Chengdu 610041,China)
出处
《物探与化探》
CAS
CSCD
北大核心
2018年第5期1042-1048,共7页
Geophysical and Geochemical Exploration
基金
中国石油西南油气田分公司勘探开发研究院项目"双鱼石构造下二叠统地震资料精细解释"(XNS14NH2015-009)
关键词
白云岩储层
地震响应
正演模拟
dolomite reservoir
seismic response
torward modeling
