塔河油田缝洞储集体储集空间计算方法
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摘要
塔河油田奥陶系缝洞型碳酸盐岩油藏埋藏深,溶洞是主要的储集空间类型,由于储集层非均质性极强,地震分辨率有限,缝洞储集体的定量预测难度极大。针对缝洞型油藏特点,采用以属性提取和模式识别为核心的波形分析技术对缝洞异常体的边界进行了研究,通过井点缝洞储集体的标定,确定了溶洞储集体和裂缝储集体的波形相关系数,并计算了缝洞储集体异常体积。在此基础上,通过不同尺度溶洞地质模型的地震正演模拟,建立了缝洞异常体的校正图版,利用校正图版和溶洞储集体垂向上的实际储地比实现了缝洞储集体的储集空间计算。
Ordovician carbonate reservior in Tahe oilfield is a deep buried formation.Karst caverns play an important role in the oil and gas storage.Due to the extremely strong anisotropism and the limited seismic resolution,the scalar of fracture-cave reservoir body is almost undeterminable.Based on the waveform analysis using seismic attributions extraction and pattern recognition technique,the boundary of abnormal fracture-cave reservoir body is recognized,and the correlation factor of waveform between cave and fracture is established,and the volume of abnormal fracture-cave reservoir body is calculated at last.By the seismic forward modeling of fracture-cave in vary scales,the correction charts have been established to calculate the volume of fracture-cave using the actural formation-surface ratio as a reference.
Ordovician carbonate reservior in Tahe oilfield is a deep buried formation.Karst caverns play an important role in the oil and gas storage.Due to the extremely strong anisotropism and the limited seismic resolution,the scalar of fracture-cave reservoir body is almost undeterminable.Based on the waveform analysis using seismic attributions extraction and pattern recognition technique,the boundary of abnormal fracture-cave reservoir body is recognized,and the correlation factor of waveform between cave and fracture is established,and the volume of abnormal fracture-cave reservoir body is calculated at last.By the seismic forward modeling of fracture-cave in vary scales,the correction charts have been established to calculate the volume of fracture-cave using the actural formation-surface ratio as a reference.
引文
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[3]阎相宾.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.
[4]谭承军,吕景英,李国蓉.塔河油田碳酸盐岩油藏产能特征与储集层类型的相关性[J].油气地质与采收率,2001,8(3):43-45.
[5]李国政,王辉,丁勇.塔河油田奥陶系碳酸盐岩油气藏石油地质条件[J].新疆石油地质,2002,23(6):493-495.
[6]李传亮.储层岩石连续性特征尺度研究[J].中国海上油气,2004,16(2):63-65.
[7]刘学利,焦方正,翟晓先,等.塔河油田奥陶系缝洞型油藏储量计算方法[J].特种油气藏,2005,12(6):22-24,36.
[8]Liu Xueli,Jiao Fangzheng,Zhai Xiaoxian,et al.A new methodology on reservoir modeling in the fracture-cavity car-bonate rock of Tahe oilfield[A].SPE 104429.
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