一个可能的生物礁预测
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摘要
礁体预测是长兴组储层预测的关键 ,然而“想打的打不到 ,不想打的又碰到”是长兴组生物礁预测现实状况的描述。相关的研究将生物礁的反射特征归结为直接标志和间接标志两大类 ,但现有资料表明 ,具有这样典型反射特征的生物礁是少部分 ,大多数生物礁反射特征并不明显。在石柱复向斜建南构造带上 ,发现了长兴组顶一个很明显的异常反射 ,通过礁体的沉积特征、地震相特征及AVO响应特征对该异常反射进行全面分析 ,认为很可能是礁的异常反射 ,但有待钻井最终验证。
The key to prediction of reservoirs of Changxing Formation is the prediction of reef. However, it is common that the predicted reefs are always turned out to be wrong. Previous studies revealed that the reflection characters of organic reefs might be classified into direct and indirect indications. In practice, however, it is rare for reefs to have both such indications. An obviously abnormal reflection has been found in the Jiannan structural unit, Shizhu synclinorium. From the analyses of depositional characters, seismic facies, and AVO responses, the author concludes that it might be the reflection of a reef. The conclusion needs to be verified by drilling.
The key to prediction of reservoirs of Changxing Formation is the prediction of reef. However, it is common that the predicted reefs are always turned out to be wrong. Previous studies revealed that the reflection characters of organic reefs might be classified into direct and indirect indications. In practice, however, it is rare for reefs to have both such indications. An obviously abnormal reflection has been found in the Jiannan structural unit, Shizhu synclinorium. From the analyses of depositional characters, seismic facies, and AVO responses, the author concludes that it might be the reflection of a reef. The conclusion needs to be verified by drilling.
引文
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2 ThomasEnglehart.墨西哥湾中部气云四分量地震数据的解释[J].石天译.石油勘探开发情报,2001(6):33～43
3 JackCaldwell,Schlumberger.Marinemulticomponentseismology[J].TheLeadingEdge,1999,18(11):1274～1280
4 Xiang-YangLi,HengchuangDai,MichaelCM ,et,al.CompensatingfortheeffectsofgascloudsonC -waveimaging:AcasestudyfromValhall[J].TheLeadingEdge,2001,20(9):1022～1028
5 JanHK ,MarkAckers,PerGF ,etal.ProcessingtheHod3DmulticomponentOBSsurvey,comparingparallelandorthogonalacquisitiongeometries[J].TheLeadingEdge,2002,21(8):795～801
6 马永生,梅冥相,陈小兵,等.碳酸盐岩储层沉积学[M].北京:地质出版社,1999.301～309
7 谢泰俊,张群英,杨学昌.含油气系统若干问题的讨论[A].见:中国石油学会石油地质专业委员会编.中国含油气系统的应用与进展[C].北京:石油工业出版社,1997.289～288
8 张树林.莺歌海盆地天然气藏的四分量地震勘探[J].勘探地球物理进展,2002,25(5):41～51
9 KeiitiAki,PaulGR .Quantitativeseismology,theoryandmethods.AseriesofbooksinGeology[M].SanFrancisco:AllanCoxWHFreemanandCompany,1980,153
10 ShueyRT .AsimplificationoftheZoeppritzequations[J].Geophysics,1985,50(4):609～613
11 刘划一,张静,杨雨,等.四川盆地东部上二叠统长兴组生物礁气藏形成机理[J].海相油气地质.2000(合订本):145～152
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