基于古地貌分析的中深层沉积储层质量评价——以渤海X油田沙二段为例
|
摘要
在地震资料精细解释基础上,采用去压实和古水深校正方法对渤海X油田沙二段沉积后古地貌进行了恢复,划分出沟谷、凹陷、斜坡和凸起等4种地貌单元,并对地貌单元控制下的储层质量进行了分析。结果表明:沟谷、凹陷单元砂体厚度大,泥质成分少,压实、胶结作用弱,溶蚀作用强,储层物性好。凸起单元砂体厚度小,泥质成分多,压实、胶结作用强,溶蚀作用弱,储层物性差。斜坡单元砂体厚度较大,迎主河道方向,水动力较强,泥质成分较少,储层物性较好;而背对主河道方向,受凸起遮挡,水动力较弱,泥质成分较多,储层物性较差。生产动态数据表明,沟谷、凹陷单元钻井产能高,凸起单元钻井产能低,斜坡单元迎主河道方向钻井产能较高,背对主河道方向钻井产能较低。此外,综合考虑砂岩厚度、古水深和比采指数等因素,预测有利储层分布区域3个。
Based on the detailed seismic profile interpretation, decompaction and paleo-depth correction method were used to restore the geomorphology conditions after the deposition of Sha-2 Formation in X oilfield of Bohai Bay. Four geomorphic units, including paleo-valley, paleo-sag, paleo-slope and paleo-uplift, were defined and the reservoir quality of all geomorphic units was analyzed and discussed. The results show that, among all geomorphic units, the sandstone reservoirs developed in paleo-valley and paleo-sag units have the characteristics of thick formations, low clay content, weak compaction and cementation, strong dissolution and good reservoir properties; while the sandstone deposited at paleo-uplift has the characteristics of thin formation, high clay content, strong compaction and cementation, weak dissolution and poor reservoir quality; the sandstone deposited on paleo-slope has the characteristics of thick formation, less clay content due to strong hydrodynamic condition in the main drainage direction and good reservoir property; in contrast, in the opposite direction of main drainage line, due to the isolation of paleo-uplift, sandstone generally has high clay content due to weak hydrodynamics, and its reservoir property is relatively worse along this direction. Meanwhile production performance data show that well productivity is high in paleo-sag units and low in paleo-uplift; at the paleo-slope area,well productivity is high along the main drainage direction and low in the opposite direction. In addition, comprehensively considering the factors such as sand thickness, paleo-water depth and specific productivity index etc., three beneficial zones are predicted.
Based on the detailed seismic profile interpretation, decompaction and paleo-depth correction method were used to restore the geomorphology conditions after the deposition of Sha-2 Formation in X oilfield of Bohai Bay. Four geomorphic units, including paleo-valley, paleo-sag, paleo-slope and paleo-uplift, were defined and the reservoir quality of all geomorphic units was analyzed and discussed. The results show that, among all geomorphic units, the sandstone reservoirs developed in paleo-valley and paleo-sag units have the characteristics of thick formations, low clay content, weak compaction and cementation, strong dissolution and good reservoir properties; while the sandstone deposited at paleo-uplift has the characteristics of thin formation, high clay content, strong compaction and cementation, weak dissolution and poor reservoir quality; the sandstone deposited on paleo-slope has the characteristics of thick formation, less clay content due to strong hydrodynamic condition in the main drainage direction and good reservoir property; in contrast, in the opposite direction of main drainage line, due to the isolation of paleo-uplift, sandstone generally has high clay content due to weak hydrodynamics, and its reservoir property is relatively worse along this direction. Meanwhile production performance data show that well productivity is high in paleo-sag units and low in paleo-uplift; at the paleo-slope area,well productivity is high along the main drainage direction and low in the opposite direction. In addition, comprehensively considering the factors such as sand thickness, paleo-water depth and specific productivity index etc., three beneficial zones are predicted.
引文
[1]周军良,胡勇,何康,等.渤海海域渤中C地区中深层异常高压成因及对储层质量的影响[J].西安石油大学学报(自然科学版),2017,32(1):23-30.
[2]陈延芳,刘士磊,宋章强,等.渤海中深部碎屑岩有效储层划分及勘探意义:以黄河口凹陷为例[J].断块油气田,2012,19(6):710-713.
[3] GALLOWAY W E. Diagenetic control of reservoir quality in arcderived sandstones:implications for petroleum exploration[J]. SEPM Special Publication,1979,26:251-262.
[4]邹明亮,黄思静,胡作维,等.西湖凹陷平湖组砂岩种碳酸盐胶结物形成机制及其对储层质量的影响[J].岩性油气藏,2008,20(1):47-52.
[5]郭永贵.特低渗储层孔喉结构与剩余油分布关系[J].断块油气田,2017,24(2):218-221.
[6]李振鹏,张国坤,汪跃,等.歧南断阶带沙河街组储层特征及物性主控因素[J].断块油气田,2018,25(3):294-299.
[7]何崇康,成良丙,陈旭峰,等.鄂尔多斯盆地新安边油田长7致密油有效储层识别与甜点优选[J].石油实验地质,2017,39(6):812-818.
[8]杨莎莎,赵永刚,刘晓娟,等.靖边东南部长2储层特征及储层质量评价[J].断块油气田,2014,21(2):157-160,180.
[9]孙海涛,李超,钟大康,等.渤中25-1油田沙三段低渗储层特征及其成因[J].岩性油气藏,2014,26(3):11-21.
[10]周军良,胡勇,李超,等.渤海典型低孔低渗油藏储层预测及效果:以渤海A油田沙河街组二段为例[J].海相油气地质,2016,21(4):73-77.
[11]周军良,胡勇,耿红柳,等.渤海海域A油田沙二段低渗储层特征及主控因素[J].海洋地质前沿,2016,32(12):26-32.
[12]崔龙涛,冯栋,秦雁群,等.鄂尔多斯盆地镇北地区延长组长7古地貌与砂体分布特征[J].岩性油气藏,2013,25(5):65-69.
[13]于雷,王维斌,车飞,等.鄂尔多斯盆地吴旗油区下侏罗统古地貌特征与油气富集关系[J].断块油气田,2014,21(2):147-151.
[14]郭颖,倪金龙.利用等效孔隙度法恢复沉积盆地残余地层古厚度:以济阳坳陷惠民凹陷为例[J].油气地质与采收率,2012,19(3):42-45.
[15]张鹏,张金功,张亮,等.济阳坳陷渤南洼陷沙河街组二段多源供烃成藏模式[J].石油实验地质,2018,40(2):159-167.
[16]漆家福,杨桥.关于碎屑岩层的去压实校正方法的讨论:兼讨论李绍虎等提出的压实校正法[J].石油实验地质,2001,23(3):351-356.
[17]康安,朱筱敏,王贵文,等.古水深曲线在测井资料层序地层分析中的应用[J].沉积学报,2000,18(1):63-66.
[18] DIEM B. Analytical method for estimating palaeowave climate and water depth fromwave ripple marks[J]. Sedimentology,1985,32(5):705-720.
[19]林小兵,刘莉萍,田景春,等.川西坳陷中部须家河组五段致密砂岩储层特征及主控因素[J].石油与天然气地质,2014,35(2):224-230.
[20]葛家旺,秦成岗,朱筱敏,等.惠州凹陷HZ25-7构造带文昌组低孔低渗砂岩储层特征和成因机理[J].岩性油气藏,2014,26(4):36-42.
[2]陈延芳,刘士磊,宋章强,等.渤海中深部碎屑岩有效储层划分及勘探意义:以黄河口凹陷为例[J].断块油气田,2012,19(6):710-713.
[3] GALLOWAY W E. Diagenetic control of reservoir quality in arcderived sandstones:implications for petroleum exploration[J]. SEPM Special Publication,1979,26:251-262.
[4]邹明亮,黄思静,胡作维,等.西湖凹陷平湖组砂岩种碳酸盐胶结物形成机制及其对储层质量的影响[J].岩性油气藏,2008,20(1):47-52.
[5]郭永贵.特低渗储层孔喉结构与剩余油分布关系[J].断块油气田,2017,24(2):218-221.
[6]李振鹏,张国坤,汪跃,等.歧南断阶带沙河街组储层特征及物性主控因素[J].断块油气田,2018,25(3):294-299.
[7]何崇康,成良丙,陈旭峰,等.鄂尔多斯盆地新安边油田长7致密油有效储层识别与甜点优选[J].石油实验地质,2017,39(6):812-818.
[8]杨莎莎,赵永刚,刘晓娟,等.靖边东南部长2储层特征及储层质量评价[J].断块油气田,2014,21(2):157-160,180.
[9]孙海涛,李超,钟大康,等.渤中25-1油田沙三段低渗储层特征及其成因[J].岩性油气藏,2014,26(3):11-21.
[10]周军良,胡勇,李超,等.渤海典型低孔低渗油藏储层预测及效果:以渤海A油田沙河街组二段为例[J].海相油气地质,2016,21(4):73-77.
[11]周军良,胡勇,耿红柳,等.渤海海域A油田沙二段低渗储层特征及主控因素[J].海洋地质前沿,2016,32(12):26-32.
[12]崔龙涛,冯栋,秦雁群,等.鄂尔多斯盆地镇北地区延长组长7古地貌与砂体分布特征[J].岩性油气藏,2013,25(5):65-69.
[13]于雷,王维斌,车飞,等.鄂尔多斯盆地吴旗油区下侏罗统古地貌特征与油气富集关系[J].断块油气田,2014,21(2):147-151.
[14]郭颖,倪金龙.利用等效孔隙度法恢复沉积盆地残余地层古厚度:以济阳坳陷惠民凹陷为例[J].油气地质与采收率,2012,19(3):42-45.
[15]张鹏,张金功,张亮,等.济阳坳陷渤南洼陷沙河街组二段多源供烃成藏模式[J].石油实验地质,2018,40(2):159-167.
[16]漆家福,杨桥.关于碎屑岩层的去压实校正方法的讨论:兼讨论李绍虎等提出的压实校正法[J].石油实验地质,2001,23(3):351-356.
[17]康安,朱筱敏,王贵文,等.古水深曲线在测井资料层序地层分析中的应用[J].沉积学报,2000,18(1):63-66.
[18] DIEM B. Analytical method for estimating palaeowave climate and water depth fromwave ripple marks[J]. Sedimentology,1985,32(5):705-720.
[19]林小兵,刘莉萍,田景春,等.川西坳陷中部须家河组五段致密砂岩储层特征及主控因素[J].石油与天然气地质,2014,35(2):224-230.
[20]葛家旺,秦成岗,朱筱敏,等.惠州凹陷HZ25-7构造带文昌组低孔低渗砂岩储层特征和成因机理[J].岩性油气藏,2014,26(4):36-42.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |