东营凹陷北带深层砂砾岩体的地震预测方法
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摘要
东营凹陷北带盐下砂砾岩体具有良好的成藏条件,但由于深层地震资料的分辨率低,盐下砂砾岩体勘探具有较大的风险。因此,基于现有资料,对盐下砂砾岩体的地震预测技术进行了探索。首先进行了成藏控制因素和成藏模式分析,将扇体分为近岸水下扇和深水浊积扇两大类;然后针对不同类型的扇体,分别讨论了相应的地震预测方法。对于近岸水下扇,采用岩石物理分析、正演模拟、地层切片和叠前弹性阻抗反演等方法进行储层预测和流体识别;对于深水浊积扇,利用地震属性分析、测井约束反演和吸收特征分析等方法,进行储层预测和含气性分析。预测结果与钻井结果的对比表明,上述地震预测方法可以有效识别储层的含气性,划分有利勘探区。
The sub-salt glutinite bodies in the northern zone of Dongying Depression provide favorable pooling potential.However,because of the low resolution of seismic data from deep layers,the exploration of sub-salt glutinite bodies still has risky.Therefore,based on the existing data,we probed seismic prediction technique of sub-salt glutinite bodies.Firstly,the pooling controlling factors and pooling patterns were analyzed,and the fans were classified into nearshore subaqueous fan and deep-water turbidite fan.Then,seismic prediction methods discussed for different types of fans.For nearshore subaqueous fan,petrophysical analysis,forward modeling,strata slice and pre-stack elastic impedance inversion can be used for reservoir prediction and fluid identification;for deep-water turbidite fan,seismic attributes analysis,logging constraint inversion and absorption characteristics analysis can be adopted for reservoir prediction and gas-bearing analysis.The comparison between prediction results and drilling results show that the above seismic prediction method can effectively recognize the ga~bearing of reservoirs and identify favorable exploration area.
The sub-salt glutinite bodies in the northern zone of Dongying Depression provide favorable pooling potential.However,because of the low resolution of seismic data from deep layers,the exploration of sub-salt glutinite bodies still has risky.Therefore,based on the existing data,we probed seismic prediction technique of sub-salt glutinite bodies.Firstly,the pooling controlling factors and pooling patterns were analyzed,and the fans were classified into nearshore subaqueous fan and deep-water turbidite fan.Then,seismic prediction methods discussed for different types of fans.For nearshore subaqueous fan,petrophysical analysis,forward modeling,strata slice and pre-stack elastic impedance inversion can be used for reservoir prediction and fluid identification;for deep-water turbidite fan,seismic attributes analysis,logging constraint inversion and absorption characteristics analysis can be adopted for reservoir prediction and gas-bearing analysis.The comparison between prediction results and drilling results show that the above seismic prediction method can effectively recognize the ga~bearing of reservoirs and identify favorable exploration area.
引文
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2夏景生,钟建华,高祥成.丰深1地区沙四段砂砾岩体的储层特征及影响因素[J].石油天然气学报,2007,29 (3):199-201
3乔俊.胜坨地区砂砾岩体扇体成藏机制与勘探技术分析[J].断块油气田,2005,12(4):18-27
4尚新民,李红梅,韩文功,等.基于岩石物理与地震正演的AVO分析方法[J].天然气工业,2008,28(2):64- 66
5黄伟传,杨长春,范桃园,等.岩石物理分析技术在储层预测中的应用[J].地球物理学进展,2007,22(6): 1791-1795
6董春梅,张宪国,林承焰,等.地震沉积学的概念、方法和技术[J].沉积学报,2006,24(5):698-704
7钱荣钧.对地震切片解释中的一些问题的分析[J].石油地球物理勘探,2007,42(4):482-487
8 Aki K,Richards P G.Quantitative seismology[M].San Francisco,USA:W.H.Freeman and Company, 1980.659-672
9 Shuey R T.A simplification of the Zoppritz equations [J].Geophysics,1984,50(4):609-614
10 Whitecombe D N.Elastic impedance normalization [J].Geophysics,2002,67(1):60-62
11孟宪军,慎国强,王玉梅,等.叠前AVA地震纵横波阻抗同步反演技术研究[J].石油物探,2004,43(增刊): 53-55
12李凌高,甘利灯,杜文辉,等.叠前地震反演在苏里格气田储层识别和含气性检测中的应用[J].天然气地球科学,2008,19(2):261-265
13王永刚,乐友喜.张军华.地震属性分析技术[M].东营:中国石油大学出版社,2007.94-95
14马劲风,王学军,贾春环,等.波阻抗约束反演中的约束方法研究[J].石油物探,2000,39(2):52-63
15孟宪军,金翔龙.钮学民,等.地震反演中三维复杂约束模型[J].石油大学学报(自然科学版),2004,28(6): 21-26
16朱红涛,陈开远.分频吸收系数技术在储层横向预测中的方法原理[J].科技进步与对策,2003(增刊): 263-265
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