塔河油田12区奥陶系碳酸盐岩缝洞储层波阻抗响应特征研究
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摘要
塔河油田奥陶系碳酸盐岩缝洞型储层纵横向非均质性强,储层预测难度较大。为此,利用地质、地震特征反演技术(InverMod)对塔河油田12区进行了波阻抗反演。根据波阻抗反演剖面上低值区的形态、规模及数值大小划分出了团块状、连片状、条带状、薄层状等4种响应特征,并将波阻抗大于1.55×10~7(kg/m~3·m/s)的称为弱显示。在此基础上,结合钻井剖面发育的裂缝-溶洞型、裂缝-孔洞型和裂缝型等3类储层确定出了各类储层波阻抗门槛值及其波阻抗响应特征,对提高有效预测塔河12区奥陶系碳酸盐岩储层的水平,规避勘探风险,具有一定的指导作用。
Tahe oilfield Ordovician carbonate reservoir with strong heterogeneity of the vertical and horizontal,reservoir prediction is very difficult.In view of this,using the geological and seismic characteristics inversion technology to do wave impedance inversion in block 12 of Tahe oilfield.Based on the low area of form,scale and magnitude in the wave impedance inversion section,wave impedance is divided into lumpish,sheet,banded and flaggy the four response characteristics,and wave impedance more than 1.55×10~7(kg/m~3·m/s) is known as weak response.On this basis,combined with fractured-cavernous reservoir,fractured-vuggy reservoir and fractured reservoir the three types reservoirs in the drilling profile to determine wave impedance threshold and response characteristics of each types of reservoir,for improving the level of effective predict Ordovician carbonate reservoir in block 12 of Tahe oilfield and voiding exploration risk with some guidance.
Tahe oilfield Ordovician carbonate reservoir with strong heterogeneity of the vertical and horizontal,reservoir prediction is very difficult.In view of this,using the geological and seismic characteristics inversion technology to do wave impedance inversion in block 12 of Tahe oilfield.Based on the low area of form,scale and magnitude in the wave impedance inversion section,wave impedance is divided into lumpish,sheet,banded and flaggy the four response characteristics,and wave impedance more than 1.55×10~7(kg/m~3·m/s) is known as weak response.On this basis,combined with fractured-cavernous reservoir,fractured-vuggy reservoir and fractured reservoir the three types reservoirs in the drilling profile to determine wave impedance threshold and response characteristics of each types of reservoir,for improving the level of effective predict Ordovician carbonate reservoir in block 12 of Tahe oilfield and voiding exploration risk with some guidance.
引文
[1]李庆忠.走向精确勘探的道路[M].北京:石油工业出版社, 1994.
[2]李特.不同反演方法在碳酸盐岩储层预测中的应用效果[J].中国西部油气低值,2006,2(2):216-218.
[3]张永升,李家蓉,潘新志.地震和测井联合反演技术在塔河油田碳酸盐岩储层预测中的应用[J].勘探地球物理进展, 2002,25(4):46-48.
[4]龚洪林.塔中地区奥陶系碳酸盐岩岩石地球物理特征研究[J].天然气地球物理勘探,2009,20(1):138-142.
[5]张昕,郑晓东.裂缝发育带地震识别预测技术研究进展[J]油地球物理勘探,2005,40(6):724-730.
[2]李特.不同反演方法在碳酸盐岩储层预测中的应用效果[J].中国西部油气低值,2006,2(2):216-218.
[3]张永升,李家蓉,潘新志.地震和测井联合反演技术在塔河油田碳酸盐岩储层预测中的应用[J].勘探地球物理进展, 2002,25(4):46-48.
[4]龚洪林.塔中地区奥陶系碳酸盐岩岩石地球物理特征研究[J].天然气地球物理勘探,2009,20(1):138-142.
[5]张昕,郑晓东.裂缝发育带地震识别预测技术研究进展[J]油地球物理勘探,2005,40(6):724-730.
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