塔中卡塔克区块古岩溶储层地震预测技术
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摘要
塔里木盆地塔中地区奥陶系古岩溶储层具有埋藏深、非均质性强等特点,但其测井和地震响应较为明显。为此,利用地震、测井和地质资料及地震资料叠后波阻抗反演、属性分析和叠前双相介质储层物性参数反演技术,对该区东南部卡塔克区块下奥陶统古岩溶缝洞型储层进行了识别、预测和含油气检测分析。结果表明,卡塔克区块有5个古岩溶储层发育区带,并综合评价出4个有利钻探目标。优选其中一个目标进行钻探,证实了预测结果的可靠性。
The Ordovician carbonate reservoirs of in the Tazhong area of Tarim Basin were characterized by deeply buried depth and strong heterogeneity.These reservoirs have the obvious reflection features and well-log curves.Based on these geophysical responses,many seismic techniques such as post-stack seismic attributes,seismic acoustic impedance inversion,lithology inversion from pre-stack seismic data,and hydrocarbon detection were applied for predicting the fractured and paleocave reservoirs of Lower Ordovician on the southeastern slope of Tazhong area.Five developed zones of paleokarst reservoirs and four favorable drilling targets were obtained from the integration analyses of seismic data and well data by using structure,rock physics and lithofacies information.An oil well in the favorable target zone was drilled,and the above prediction was proved.
The Ordovician carbonate reservoirs of in the Tazhong area of Tarim Basin were characterized by deeply buried depth and strong heterogeneity.These reservoirs have the obvious reflection features and well-log curves.Based on these geophysical responses,many seismic techniques such as post-stack seismic attributes,seismic acoustic impedance inversion,lithology inversion from pre-stack seismic data,and hydrocarbon detection were applied for predicting the fractured and paleocave reservoirs of Lower Ordovician on the southeastern slope of Tazhong area.Five developed zones of paleokarst reservoirs and four favorable drilling targets were obtained from the integration analyses of seismic data and well data by using structure,rock physics and lithofacies information.An oil well in the favorable target zone was drilled,and the above prediction was proved.
引文
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[4]张抗.塔河油田性质和塔里木碳酸盐岩油气勘探方向[J].石油学报,2001,22(4):1-7.Zhang Kang.The characteristics of Tahe Oilfield and the oil-gasexploration direction in the carbonates of Tarim Basin[J].ActaPetrolei Sinica,2001,22(4):1-7.
[5]Loucks R G.Paleocave carbonate reservoirs:Origins,burial-depthmodifications,spatial complexity,and reservoir implications[J].AAPG Bulletin,1999,83(11):1795-1834.
[6]姚姚,唐文榜.深层碳酸盐岩岩溶风化壳洞缝型油气藏可检测性的理论研究[J].石油地球物理勘探,2003,38(6):623-629.Yao Yao,Tang Wenbang.Theoretical study of detectable cavern-fractured reservoir in weathered karst of deep carbonatite[J].OilGeophysical Prospecting,2005,38(6):623-629.
[7]“Rick”Sarg J F,Schuelke J S.Integrated seismic analysis of car-bonate reservoirs:From the framework to the volume attributes[J].The Leading Edge,2003,22(7):640-645.
[8]杨顶辉,张中杰,滕吉文,等.双相各向异性研究、问题与应用前景[J].地球物理学进展,2000,15(2):7-18.Yang Dinghui,Zhang Zhongjie,Teng Jiwen,et al.The study oftwo-phase anisotropy questions and applied prospects[J].Pro-gress in Geophysics,2000,15(2):7-18.
[9]张应波.Biot理论应用于地震勘探的探索[J].石油物探,1994,33(4):29-38.Zhang Yingbo.Biot theory in application to seismic prospecting[J].Geophysical Prospecting for Petroleum,1994,33(4):29-38.
[10]张应波.地震孔隙率反演方法和应用[J].石油地球物理勘探,1994,29(3):261-273.Zhang Yingbo.A new method for seismic porosity inversion andits application[J].Oil Geophysical Prospecting,1994,29(3):261-273.
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