塔河油田南部缝孔型碳酸盐岩储层叠前地震预测
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摘要
塔河油田南部中、下奥陶统碳酸盐岩储层以裂缝型储层为主,经溶蚀形成缝孔型有效储集体。裂缝的展布受断裂控制,油层厚度小,水体活跃。储层具有大小规模不同、空间分布形态不规则、充填性质各异的缝孔组合特征。针对这类缝孔型储层,提出了叠前地震各向异性分析和叠前弹性参数反演预测方法。实际地震资料的应用表明,前者能有效预测裂缝发育强度及方位,结合井资料后者能有效预测缝孔带发育级别及含流体指示,两项预测结果与已知的缝洞储层及钻探结果基本吻合。两项叠前地震预测技术均揭示了塔河南部视层状区域呈块体状及条带状展布的几个有利缝孔储集发育带,从而提高了预测小尺度缝孔型碳酸盐岩储层空间展布规律的能力。
The carbonate reservoirs of the Middle and Lower Ordovician in southern Tahe oilfield are mainly of fractured-vuggy type featured in effective fractures and rugs formed by dissolution.The distribution of fractures in these reservoirs is controlled by faults,the oil layers are thin,and water bodies are active.The fracture-rug combinations are of different scales,irregular spatial distributions,and various filling properties.In view of the characteristics of the fractured-vuggy carbonate reservoirs in the study area,two techniques are presented,namely the pre-staek anisotropy analysis technology for detecting the intensity and azimuth of fractures and the pre-stack elastic parameter inversion method for predicting,in combination with log data,the growth of the fractured-vuggy zones and fluid-bearing indicators.The application of the techniques in southern Tahe oilfield reveals that the prediction results are basically consistent with data gathered from the known fractured-vuggy reservoirs and dril- ling data.The application of these two techniques has improved the prediction of spatial distribution of small- scale fractured-vuggy reservoirs and also shows that there are several favorable fraetured-vuggy zones distributed in the southern Tahe oilfield.
The carbonate reservoirs of the Middle and Lower Ordovician in southern Tahe oilfield are mainly of fractured-vuggy type featured in effective fractures and rugs formed by dissolution.The distribution of fractures in these reservoirs is controlled by faults,the oil layers are thin,and water bodies are active.The fracture-rug combinations are of different scales,irregular spatial distributions,and various filling properties.In view of the characteristics of the fractured-vuggy carbonate reservoirs in the study area,two techniques are presented,namely the pre-staek anisotropy analysis technology for detecting the intensity and azimuth of fractures and the pre-stack elastic parameter inversion method for predicting,in combination with log data,the growth of the fractured-vuggy zones and fluid-bearing indicators.The application of the techniques in southern Tahe oilfield reveals that the prediction results are basically consistent with data gathered from the known fractured-vuggy reservoirs and dril- ling data.The application of these two techniques has improved the prediction of spatial distribution of small- scale fractured-vuggy reservoirs and also shows that there are several favorable fraetured-vuggy zones distributed in the southern Tahe oilfield.
引文
1 杨子川,李宗杰,窦慧媛.储层的地震识别模式分析及定量预测技术初探--以塔河油田碳酸盐岩储层为例[J].石油物探,2007,46(4) :370～377
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9 王世星,曹辉兰,靳文芳,等.碳酸盐岩缝洞系统地震响应特征分析和卡1区缝洞储层预测[J].石油物探,2005,44(5) :421～427
10 李明,李守林,赵一民.塔里木盆地某地区碳酸盐岩裂缝储层预测研究[J].石油物探,2000,39(2) :24～35
11 张永升.波形分析方法在碳酸盐岩储层预测中的应用[J].石油物探,2004,43(2) :135～138
12 闫相宾.塔河油田奥陶系碳酸盐岩储层特征[J].石油与天然 气地质,2002,23(3) :262～265
13 王金琪.塔里木奥陶系岩溶储集的油气前景[J].石油与天然气地质,1999,20(4) :305～310
14 塔河油田奥陶系碳酸盐岩储层测井识别与评价[J].石油与天然气地质,2008,29(1) :61～65
15 Guan Luping,Wang Shixing.Prediction of fracture-cavity system in carbonate reservoir:a case study from Tahe oilfield,China[J].The Leading Edge ,2006,25(11) :1 396-1 400
16 Perez M A,Gibson R L,Toksoz N.Detection of fracture orientation using azimuthal variation of P-wave AVO responses[J].Geophysics,1999,64(4) :1 253-1 265
2 张秀荣,赵冬梅,胡国山.塔河油田碳酸盐岩储层类型测井分析[J].石油物探,2005,44(3) :240～245
3 漆立新.塔河油田碳酸盐岩储层高精度地震勘探的思考[J].石油物探,2005,44(4) :352～356
4 李剑峰,赵群,郝守玲,等.塔河油田碳酸盐岩储层缝洞系统的物理模拟研究[J].石油物探,2005,44(5) :428～432
5 王士敏,鲁新便.塔河油田碳酸盐岩储层预测技术[J].石油物探,2004,43(2) :153～158
6 鲁新便,王士敏.应用变尺度分形技术研究缝洞型碳酸盐岩储层的非均质性[J].石油物探,2003,42(3) :309～312
7 焦方正.塔河油气田开发研究文集[M].北京:石油工业出版社,2006
8 袁国芬.塔河油田碳酸盐岩储层地球物理响应特征[J].石油物探,2003,42(3) :318～321
9 王世星,曹辉兰,靳文芳,等.碳酸盐岩缝洞系统地震响应特征分析和卡1区缝洞储层预测[J].石油物探,2005,44(5) :421～427
10 李明,李守林,赵一民.塔里木盆地某地区碳酸盐岩裂缝储层预测研究[J].石油物探,2000,39(2) :24～35
11 张永升.波形分析方法在碳酸盐岩储层预测中的应用[J].石油物探,2004,43(2) :135～138
12 闫相宾.塔河油田奥陶系碳酸盐岩储层特征[J].石油与天然 气地质,2002,23(3) :262～265
13 王金琪.塔里木奥陶系岩溶储集的油气前景[J].石油与天然气地质,1999,20(4) :305～310
14 塔河油田奥陶系碳酸盐岩储层测井识别与评价[J].石油与天然气地质,2008,29(1) :61～65
15 Guan Luping,Wang Shixing.Prediction of fracture-cavity system in carbonate reservoir:a case study from Tahe oilfield,China[J].The Leading Edge ,2006,25(11) :1 396-1 400
16 Perez M A,Gibson R L,Toksoz N.Detection of fracture orientation using azimuthal variation of P-wave AVO responses[J].Geophysics,1999,64(4) :1 253-1 265
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