海上油田开发早期储层构型研究及应用——以渤中A油田X沉积体为例
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摘要
渤海新近纪浅水三角洲沉积储层纵横向变化快、隔夹层发育,在少井条件下如何开展储层展布研究及水平井部署是海上油田开发早期亟待解决的问题。以渤中A油田浅水三角洲相X沉积体为例,据岩心、测井、地震等资料分析储层沉积特征,在高分辨率层序地层学指导下细分成因单元,分析单砂体对应测井、地震波形特征并刻画其展布。研究区储层类型以叠置分流河道、河口坝及河道间沉积为主,结合高分辨率地层学将目的层划分为1个短期旋回、4个超短期旋回,反映了一套基准面逐渐下降至暴露环境,后基准面上升至再次湖泛的过程。根据储层沉积特征、地震响应特征和复合砂体精细构型研究,识别出复合砂体的3种接触关系,同时对X沉积体进行了单河道识别和隔夹层分布规律研究,将X沉积体细分为3期单元砂体,并总结出3种储层结构类型,结合已有水平井的生产动态特征,提出X沉积体水平井部署的4种开发模式,有效指导了开发井实施。
The Neogene shallow-water deltaic reservoir,which bears many intercalations,changes quickly both vertically and horizontally in the Bohai Oilfield.Predicting the reservoir distribution and optimizing the location of horizontal wells need to be solved in the early stage of development in order to reduce the well number to the minimum.The shallow-water deltaic deposit in the Bozhong A oilfield is selected as an example in this case of study.According to the data of cores,logging and seismics,the deposits are divided into several genetic units under the guidance of high resolution sequence stratigraphy.In the study area,distributary channels,mouth bars and river sediments are well developed.The depositional sequence includes 1short-term cycles and 4ultra-short-term cycles,reflecting aprogradational sequence as the sea-level decline to exposure,and then a retrogradational sequence as the sea level rising again to the flooding surface.According to the deposition pattern and sequence characteristics,3kinds of contact relationship of the composite sand body are identified.Moreover,single-channel sand body and distribution of interlayers are predicted.The sand body X is separated into three upon structures.Combining with the production characteristics of horizontal wells,suggestions are made for optimization of horizontal wells under the four development modes.
The Neogene shallow-water deltaic reservoir,which bears many intercalations,changes quickly both vertically and horizontally in the Bohai Oilfield.Predicting the reservoir distribution and optimizing the location of horizontal wells need to be solved in the early stage of development in order to reduce the well number to the minimum.The shallow-water deltaic deposit in the Bozhong A oilfield is selected as an example in this case of study.According to the data of cores,logging and seismics,the deposits are divided into several genetic units under the guidance of high resolution sequence stratigraphy.In the study area,distributary channels,mouth bars and river sediments are well developed.The depositional sequence includes 1short-term cycles and 4ultra-short-term cycles,reflecting aprogradational sequence as the sea-level decline to exposure,and then a retrogradational sequence as the sea level rising again to the flooding surface.According to the deposition pattern and sequence characteristics,3kinds of contact relationship of the composite sand body are identified.Moreover,single-channel sand body and distribution of interlayers are predicted.The sand body X is separated into three upon structures.Combining with the production characteristics of horizontal wells,suggestions are made for optimization of horizontal wells under the four development modes.
引文
[1]彭文绪,孙和风,张如才,等.渤海海域黄河口凹陷近源晚期优势成藏模式[J].石油与天然气地质,2009,30(4):510-518.
[2]赵翰卿,付志国,吕晓光,等.大型河流—三角洲沉积储层精细描述方法[J].石油学报,2000,21(4):109-113.
[3]张绍臣,李臣,贾培宜,等.萨南油田南二区曲流型分流河道砂体建筑结构及剩余油挖潜[J].大庆石油学院学报,2009,33(4):27-30.
[4]尹太举,张昌明,汤军,等.马厂油田储层层次结构分析[J].江汉石油学院学报,2001,23(4):19-21.
[5]尹太举,张昌明,樊中海,等.地下储层建筑结构预测模型的建立[J].西安石油学院学报:自然科学版,2002,17(3):7-10,14.
[6]卢虎胜,林承焰,程奇,等.东营凹陷永安镇油田沙二段三角洲相储层构型及剩余油分布[J].大庆石油学院学报,2013,37(3):40-47.
[7]吴胜和,翟瑞,李宇鹏.地下储层构型表征,现状与展望[J],地学前缘,2012,19(2):15-23.
[8]岳大力,吴胜和,刘建民.曲流河点坝地下储层构型精细解剖方法[J].石油学报,2007,28(4):99-100.
[9]张善义,兰金玉.水下分流河道建筑结构模式的建立及对剩余油的控制作用[J].油气藏评价与开发,2013,3(5):9-12.
[10]刘超,赵春明,廖新武,等.海上油田大井距条件下曲流河储层内部构型精细解剖及应用分析[J].中国海上油气,2014,26(1):58-64.
[11]周东红,张志军,谭辉煌.基于谱反演的超限厚储层描述技术及其在渤海海域“富砂型”极浅水三角洲储集层的应用[J],中国海上油气,2015,27(3):25-30.
[2]赵翰卿,付志国,吕晓光,等.大型河流—三角洲沉积储层精细描述方法[J].石油学报,2000,21(4):109-113.
[3]张绍臣,李臣,贾培宜,等.萨南油田南二区曲流型分流河道砂体建筑结构及剩余油挖潜[J].大庆石油学院学报,2009,33(4):27-30.
[4]尹太举,张昌明,汤军,等.马厂油田储层层次结构分析[J].江汉石油学院学报,2001,23(4):19-21.
[5]尹太举,张昌明,樊中海,等.地下储层建筑结构预测模型的建立[J].西安石油学院学报:自然科学版,2002,17(3):7-10,14.
[6]卢虎胜,林承焰,程奇,等.东营凹陷永安镇油田沙二段三角洲相储层构型及剩余油分布[J].大庆石油学院学报,2013,37(3):40-47.
[7]吴胜和,翟瑞,李宇鹏.地下储层构型表征,现状与展望[J],地学前缘,2012,19(2):15-23.
[8]岳大力,吴胜和,刘建民.曲流河点坝地下储层构型精细解剖方法[J].石油学报,2007,28(4):99-100.
[9]张善义,兰金玉.水下分流河道建筑结构模式的建立及对剩余油的控制作用[J].油气藏评价与开发,2013,3(5):9-12.
[10]刘超,赵春明,廖新武,等.海上油田大井距条件下曲流河储层内部构型精细解剖及应用分析[J].中国海上油气,2014,26(1):58-64.
[11]周东红,张志军,谭辉煌.基于谱反演的超限厚储层描述技术及其在渤海海域“富砂型”极浅水三角洲储集层的应用[J],中国海上油气,2015,27(3):25-30.
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