松辽盆地大情字井地区青二段沉积微相与砂体特征
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摘要
松辽盆地大情字井地区油气勘探重点已由构造油藏转为隐蔽性岩性油藏,非主力油层青二段成为今后主要勘探目标。对区域地质资料、岩心资料、重矿物、地震以及测井曲线等资料进行综合分析,确定大情字井地区青二段油层主要为三角洲前缘—前三角洲沉积体系,并对主要沉积微相类型进行了识别,分析了主力小层沉积微相与砂体展布规律。砂体类型以水下分流河道和河口坝为主,其中,水下分流河道呈条带状SW—NE向展布,向东逐渐减薄,受河道侧向摆动影响,砂体呈叠置或切割分布,形成复合条带状砂体和断续砂。
The key target of exploration activity in Daqingzijing area has changed from structural pool to subtle lithologic pool, and the non-major reservoirs of Qing 2 formation will become the main exploration target in the future. This paper makes a multidisciplinary analysis of regional geology, core data, heavy minerals, seismic data and logs, determines that the Qing 2 reservoir in Daqingzijing area belongs to delta front-prodelta depositional system, identifies the types of major sedimentary microfacies, and analyzes sedimentary microfacies and the rule of sand-body distribution for the main subzones. Underwater distributary channel and mouth bar constitute the main facies of sands. The underwater distributary channel extends in SW-NE string shape, thinning gradually to the east. The distribution of sand bodies is superimposed or intersected as affected by lateral swing of the channel, resulting in banded and interrupted sands.
The key target of exploration activity in Daqingzijing area has changed from structural pool to subtle lithologic pool, and the non-major reservoirs of Qing 2 formation will become the main exploration target in the future. This paper makes a multidisciplinary analysis of regional geology, core data, heavy minerals, seismic data and logs, determines that the Qing 2 reservoir in Daqingzijing area belongs to delta front-prodelta depositional system, identifies the types of major sedimentary microfacies, and analyzes sedimentary microfacies and the rule of sand-body distribution for the main subzones. Underwater distributary channel and mouth bar constitute the main facies of sands. The underwater distributary channel extends in SW-NE string shape, thinning gradually to the east. The distribution of sand bodies is superimposed or intersected as affected by lateral swing of the channel, resulting in banded and interrupted sands.
引文
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[8]钟建华,高丹,王宏翊,等.濮城油田南区Es2上沉积微相研究[J].特种油气藏,2008,15(4):44-48.
[9]毛超林,赵占银,马玉天,等.松辽盆地南部岩性油藏特征及勘探潜力[J].中国石油勘探,2005,10(6):1-5.
[10]魏志平,毛超林,孙岩,等.松辽盆地南部大情字井地区油气成藏过程分析[J].石油勘探与开发,2002,29(3):11-12.
[11]杨明达,杨铭辉,唐振兴,等.松辽盆地南部大情字井地区油气分布控制因素分析[J].石油实验地质,2003,25(3):252-256.
[2]马明侠,马金龙.松辽盆地两江地区沉积体系分布规律[J].大庆石油地质,2000,19(3):4-6.
[3]于民凤,程日辉,那晓红.陆相盆地主要沉积微相的测井特征[J].世界地质,2005,24(2):182-187.
[4]王先明,单玄龙.低渗透油藏储层沉积微相研究——以松辽盆地乾安油田高台子油层Ⅻ砂组为例[J].世界地质,2002,21(3):251-257.
[5]赵翰卿,付志国,吕晓光.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.
[6]张志坚,张国斌,佟卉,等.松辽盆地北部泰康地区青山口组一段沉积微相特征[J].大庆石油学院学报,2004,28(6):84-86.
[7]张智礼,刘振文,蒙启安,等.松辽盆地泰康地区青山口组沉积相及与油气分布关系研究[J].高校地质学报,2006,12(2):259-265.
[8]钟建华,高丹,王宏翊,等.濮城油田南区Es2上沉积微相研究[J].特种油气藏,2008,15(4):44-48.
[9]毛超林,赵占银,马玉天,等.松辽盆地南部岩性油藏特征及勘探潜力[J].中国石油勘探,2005,10(6):1-5.
[10]魏志平,毛超林,孙岩,等.松辽盆地南部大情字井地区油气成藏过程分析[J].石油勘探与开发,2002,29(3):11-12.
[11]杨明达,杨铭辉,唐振兴,等.松辽盆地南部大情字井地区油气分布控制因素分析[J].石油实验地质,2003,25(3):252-256.
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