Lithology of Guantao Formation in the Eastern Bohai Sea and Its Bearing on Oil and Gas Accumulation
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摘要:
馆陶组作为渤海东部新近系重要的勘探层系,垂向上岩性组合变化明显,岩性特征的精细研究具有重要成藏意义。利用丰富的钻井、古生物、岩心等资料,并且依据层序地层、古生物组合、岩电等特征认为,馆陶组垂向呈现粗—细—粗的沉积特征,相应划分为馆陶组上、中、下3段;馆陶组不同层段的沉积期存在水浅—水深—水浅旋回过程,相应也存在辫状河三角洲—曲流河三角洲—浅水三角洲的相变,并在垂向上形成3套储盖组合;馆陶组下段储盖组合较差,骨架砂岩具有一定的横向输导能力;结合运移断层与馆陶组储层的配置关系,建立馆陶组上、中、下3套储盖组合的成藏模式,并利用断层活动性、区域盖层厚度、砂岩相对含量等创建分流判别参数C定量标定新近系优势成藏层段,当C>0.4时,馆陶组中、上段为主要成藏层段;当C<0.4时,馆陶组上段及明化镇组下段为主要含油层系。
Abstract:Detailed lithological study has been made for the Guantao Formation, the main target layer for oil exploration in the eastern Bohai Sea. Based on the paleontological and cores data from drilling wells, combined with sequence stratigraphic analysis and various well log data, the Guantao Formation is divided vertically into three members consisting respectively of coarse, fine and coarse clastic deposits, indicating a cycle of water regression, transgression and regression. A braided river delta, a meandering river delta, and a shallow water delta occur in a vertical succession and form three reservoir-seal assemblages. The sand body of the lower member consists of high content of sand and thus good for lateral hydrocarbon migration. Specific oil and gas accumulation models for the three members are established by combination of migration faults and reservoirs. Advantageous accumulation assemblage is quantitatively predicted with the newly invented Index C which is established on fault activity, regional seal rock thickness, relative sand percentage of the Guantao and Minghuazheng Formations. The upper and middle members of the Guantao Formation will be the main target layers if the Index C is bigger than 0.4, while the upper member of the Guantao Formation and the Minghuazhen Formation will be the main target layers if the Index C is smaller than 0.4.
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[1] 张国良, 姚长华, 张云慧.从石臼坨凸起浅层油气的重大发现看渤东地区的勘探潜力[J].中国海上油气(地质), 2000, 14(2):84-92. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zghsyq-dz200002002
[2] 张宏国, 王昕, 官大勇, 等.渤海渤中A区断层差异输导及控藏作用分析[J].海洋石油, 2014, 34(3):16-21. doi: 10.3969/j.issn.1008-2336.2014.03.016
[3] 刘丽芳, 林青, 吴克强, 等.渤海海域渤东地区烃源特征及资源潜力[J].海洋地质前沿, 2015, 31(9):28-37. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzdt201509004
[4] 龚再升.中国近海盆地晚期断裂活动和油气成藏[J].石油地质, 2004, 2:12-20. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zgsykt200402002
[5] 薛永安, 柴永波, 周园园.近期渤海海域油气勘探的新突破[J].中国海上油气, 2015, 27(1):1-9. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zghsyq-gc201501001
[6] 邓运华, 郯庐断裂带新构造运动对渤海东部油气聚集的控制作用[J].中国海上油气(地质), 2001, 15(5):301-305. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zghsyq-dz200105001
[7] 吴智平, 薛雁, 颜世永, 等.渤海海域渤东地区断裂体系与盆地结构[J].高校地质学报, 2013, 19(3):463-471. doi: 10.3969/j.issn.1006-7493.2013.03.008
[8] 吴智平, 薛雁, 颜世永, 等.渤海海域渤东地区断裂体系与盆地结构[J].高校地质学报, 2013, 19(3):463-471. doi: 10.3969/j.issn.1006-7493.2013.03.008
[9] 郭永华, 周心怀, 凌艳玺, 等.渤海海域蓬莱19- 3油田油气成藏特征新认识[J].石油与天然气地质, 2011, 32(3):327-332. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=syytrqdz201103003
[10] 周毅, 张通彩, 何仕斌, 等.渤中、渤东凹陷结构认识及有利勘探方向[J].中国海上油气(地质), 1997, 11(6):432-438. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199700712901
[11] 刘长海, 魏文艳, 任志勇, 等.渤海海域渤东凹陷沙河街组四段古生物组合的发现及其意义[J].微体古生物学报, 2011, 28(3): 316-323. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=wtgswxb201103006
[12] 王应斌, 薛永安, 王广源, 等.渤海海域石臼坨凸起浅层油气成藏特征及勘探启示[J].中国海上油气, 2015, 27(2):8-16. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=zghsyq-gc201502002
[13] 王祥, 王应斌, 吕修祥, 等.渤海海域辽东湾坳陷油气成藏条件与分布规律[J].石油与天然气地质, 2011, 32(3):342-351. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=syytrqdz201103005
[14] 张若祥, 李建平, 刘志刚, 等.渤海中部馆陶组层序地层特征及底部界限研究[J].海洋石油, 2010, 30(3): 19-25. doi: 10.3969/j.issn.1008-2336.2010.03.019
[15] 宋国奇, 宁方兴, 郝雪峰, 等.骨架砂体输导能力量化评价——以东营凹陷南斜坡东段为例[J].油气地质与采收率, 2012, 19(1):4-10. doi: 10.3969/j.issn.1009-9603.2012.01.002
[16] 张参, 官大勇, 王明臣, 等.渤海海域渤东低凸起中南段构造演化与油气成藏[J].东北石油大学学报, 2014, 38(6):68-75. doi: 10.3969/j.issn.2095-4107.2014.06.009
[17] 朱伟林,米立军,龚再升,等.渤海海域油气成藏与勘探[M].北京:科学出版社, 2009.