基于地震波阻抗反演的小层砂体预测技术——在大庆油田州57水平井区块的应用
摘要
在油气勘探与开发的整个历程中,无论是勘探阶段还是进入开发后的任何时期,尤其在对水平井区目的层的砂体预测时,始终离不开对储层沉积特征的分析,州57井研究区主力油层为葡萄花油层,其沉积时期处在松辽盆地北部大型三角洲沉积体系中的前缘相带到湖相的过度带之上,沉积地层较薄,沉积单砂体一般不超过2 m。因为砂体的三维展布特征受控于地质历史时期沉积体系的时空变迁及演化,每一次的湖进湖退严格控制砂体的分布与走向,因此,在精细刻画小层砂体过程中,首先要精细的地质研究,然后利用储层地震波阻抗反演对油田小层砂体进行预测,为后期调整注采关系、提高采收率提供重要参考依据。
During the whole process of petroleum exploration and development,the prediction of sandbodies in any target area,especially those in wellblocks of horizontal wells,is always dependent upon an analysis of reservoir deposition systems.The well Zhou-57 produces from the Putaohua Formation,which was deposited within the transition zone from a large-scale delta front to lake in northern Songliao Basin.The formation features in thin single sand bodies with a thickness of less than 2 m.The spatial distribution of these sandbodies is controlled by the variation and evolution of deposition systems during different geological times.The distribution and strike of sandboies are strictly controlled by lake transgression and regression.Therefore,a fine description of these sandbodies requires firstly a detailed geological study and then a prediction of sandstone sublayers through seismic wave impedance inversion.The prediction results can be used as important reference factors to adjust the injection-production pattern and improve the recovery ratio during the later phase of development.
During the whole process of petroleum exploration and development,the prediction of sandbodies in any target area,especially those in wellblocks of horizontal wells,is always dependent upon an analysis of reservoir deposition systems.The well Zhou-57 produces from the Putaohua Formation,which was deposited within the transition zone from a large-scale delta front to lake in northern Songliao Basin.The formation features in thin single sand bodies with a thickness of less than 2 m.The spatial distribution of these sandbodies is controlled by the variation and evolution of deposition systems during different geological times.The distribution and strike of sandboies are strictly controlled by lake transgression and regression.Therefore,a fine description of these sandbodies requires firstly a detailed geological study and then a prediction of sandstone sublayers through seismic wave impedance inversion.The prediction results can be used as important reference factors to adjust the injection-production pattern and improve the recovery ratio during the later phase of development.
引文
1吕晓光,赵翰卿,付志国.1997.河流相储层平面连续性精细描述[J].石油学报,18(2):66~71
2马立祥.砂岩油气储层构形分析及其在国内的应用前景[J].天然气地球科学,1992,3(2):11~16
3穆龙新,贾爱林,黄石岩.河流-三角洲储层露头和现代河流沉积综合研究[M].北京:大庆石油管理局勘探开发研究院、石油勘探开发科学研究院,1998,1~102
4单敬福,纪友亮,史榕,等.基于神经网络和开窗技术的储层渗透率的预测方法——以大庆萨尔图油田葡萄花油层组PⅠ1—PⅠ4小层砂岩为例[J].地质科学,2007,42(2):395~402
5张红薇,赵翰卿,麻成斗.泛滥-分流平原相储层中河间砂体的精细描述[J].大庆石油地质与开发,1998,17(6):164~167
6朱伟,马朋善,谭承军,等.渤东凹陷蓬二号构造地震资料测井约束反演[J].石油与天然气地质,2005,26(1):120~124
7叶泰然,付顺,吕其彪,等.多波地震联合反演预测相对优质储层——以川西深层致密碎屑砂岩为例[J].石油与天然气地质,2009,30(3):357
8孙耀华,王华,陆永潮,等.泌阳凹陷复杂圈闭地震地质综合研究方法[J].石油与天然气地质,2009,30(3):370
9宋章强,赖维成,牛成民,等.渤海海域湖相碳酸盐岩地震-地质综合预测方法及应用[J].石油与天然气地质,2009,30(4):444
10崔永谦,秦凤启,卢永和,等.河流相沉积储层地震精细预测方法研究与应用——以渤海湾盆地冀中坳陷古近系河道砂为例[J].石油与天然气地质,2009,30(5):668
11毛凤鸣,陈安定,严元锋,等.苏北盆地复杂小断块油气成藏特征及地震识别技术[J].石油与天然气地质,2006,27(6):827~840
2马立祥.砂岩油气储层构形分析及其在国内的应用前景[J].天然气地球科学,1992,3(2):11~16
3穆龙新,贾爱林,黄石岩.河流-三角洲储层露头和现代河流沉积综合研究[M].北京:大庆石油管理局勘探开发研究院、石油勘探开发科学研究院,1998,1~102
4单敬福,纪友亮,史榕,等.基于神经网络和开窗技术的储层渗透率的预测方法——以大庆萨尔图油田葡萄花油层组PⅠ1—PⅠ4小层砂岩为例[J].地质科学,2007,42(2):395~402
5张红薇,赵翰卿,麻成斗.泛滥-分流平原相储层中河间砂体的精细描述[J].大庆石油地质与开发,1998,17(6):164~167
6朱伟,马朋善,谭承军,等.渤东凹陷蓬二号构造地震资料测井约束反演[J].石油与天然气地质,2005,26(1):120~124
7叶泰然,付顺,吕其彪,等.多波地震联合反演预测相对优质储层——以川西深层致密碎屑砂岩为例[J].石油与天然气地质,2009,30(3):357
8孙耀华,王华,陆永潮,等.泌阳凹陷复杂圈闭地震地质综合研究方法[J].石油与天然气地质,2009,30(3):370
9宋章强,赖维成,牛成民,等.渤海海域湖相碳酸盐岩地震-地质综合预测方法及应用[J].石油与天然气地质,2009,30(4):444
10崔永谦,秦凤启,卢永和,等.河流相沉积储层地震精细预测方法研究与应用——以渤海湾盆地冀中坳陷古近系河道砂为例[J].石油与天然气地质,2009,30(5):668
11毛凤鸣,陈安定,严元锋,等.苏北盆地复杂小断块油气成藏特征及地震识别技术[J].石油与天然气地质,2006,27(6):827~840