东海陆架盆地西湖凹陷平北斜坡带海陆过渡型岩性油气藏形成与分布预测
|
摘要
随着地质认识的逐步加深和勘探技术手段的进步,东海陆架盆地西湖凹陷平北斜坡带的勘探领域逐步从构造油气藏转向岩性油气藏。通过系统分析平北斜坡带海陆过渡型沉积体系的层序构成样式、砂体展布特征和油气藏发育模式,指出平北斜坡带存在断裂陡坡型、对向断阶型、反向断阶型和同向断阶型4种层序地层发育样式,对应发育断裂陡坡型潮控三角洲潮道砂岩油气藏、对向断阶型潮控三角洲前缘潮滩砂岩油气藏、反向断阶型河控三角洲前缘水道砂岩油气藏和同向断阶型河控三角洲前缘水道砂岩油气藏4种类型。结合砂体展布规律和油气藏成藏模式预测,对平北斜坡带不同区带岩性油气藏的形成条件和分布规律进行总结,并指出团结亭区断裂陡坡型潮控三角洲潮道砂岩油气藏和孔雀亭区同向断阶型河控三角洲前缘水道砂岩油气藏是该区岩性油气藏勘探重点领域。在该岩性油气藏发育模式指导下,近期针对宝云亭低隆与反向断阶带控制下的宁波19区岩性圈闭钻探取得重大突破。
With the deepening geological knowledge and the advancing exploration techniques, the exploration in Pingbei slope belt, Xihu sag of the East China Sea Shelf Basin, is shifting from structural reservoirs to lithologic reservoirs. According to the systematic analysis of transitional deposits, Pingbei slope belt is believed having four sequence stratigraphic styles, i.e., fault-slope, opposite fault terrace, antithetic fault terrace, and concordant fault terrace, which correspond to four types of sandstone reservoirs(fault-slope tide-dominated delta tidal channel, opposite fault terrace tide-dominated delta front tidal flat, antithetic fault terrace river-dominated delta front channel, and concordant fault terrace river-dominated delta front channel). Based on the sand body distribution and hydrocarbon accumulation models predicted,the formation conditions and distribution rules of lithologic reservoirs in different plays of Pingbei slope belt were identified. It is finally indicated that the sandstone reservoir of fault-slope tide-dominated delta tidal channel in Tuanjieting area and the sandstone of concordant fault terrace river-dominated delta front channel in Qongqueting area are primary exploration targets. Following the model of lithologic reservoirs,significant breakthrough has been made during drilling lithologic traps in Block Ningbo 19 controlled by Baoyunting low uplift and the antithetic fault terrace belt.
With the deepening geological knowledge and the advancing exploration techniques, the exploration in Pingbei slope belt, Xihu sag of the East China Sea Shelf Basin, is shifting from structural reservoirs to lithologic reservoirs. According to the systematic analysis of transitional deposits, Pingbei slope belt is believed having four sequence stratigraphic styles, i.e., fault-slope, opposite fault terrace, antithetic fault terrace, and concordant fault terrace, which correspond to four types of sandstone reservoirs(fault-slope tide-dominated delta tidal channel, opposite fault terrace tide-dominated delta front tidal flat, antithetic fault terrace river-dominated delta front channel, and concordant fault terrace river-dominated delta front channel). Based on the sand body distribution and hydrocarbon accumulation models predicted,the formation conditions and distribution rules of lithologic reservoirs in different plays of Pingbei slope belt were identified. It is finally indicated that the sandstone reservoir of fault-slope tide-dominated delta tidal channel in Tuanjieting area and the sandstone of concordant fault terrace river-dominated delta front channel in Qongqueting area are primary exploration targets. Following the model of lithologic reservoirs,significant breakthrough has been made during drilling lithologic traps in Block Ningbo 19 controlled by Baoyunting low uplift and the antithetic fault terrace belt.
引文
[1]中国石油天然气股份有限公司.岩性地层油气藏勘探理论与实践[M].北京:石油工业出版社,2005:519-565.China National Petroleum Corporation.Exploration theory and practice of lithologic stratigraphic oil and gas reservoirs[M].Beijing:Petroleum Industry Press,2005:519-565.
[2]赵文智,邹才能,谷志东,陶士振.砂岩透镜体油气成藏机理初探[J].石油勘探与开发,2005,34(3):273-284.Zhao Wenzhi,Zou Caineng,Gu Zhidong,Tao Shizhen.Preliminary discussion on accumulation mechanism of sand lens reservoirs[J].Petroleum Exploration and Development,2005,34(3):273-284.
[3]赵贤正,周立宏,蒲秀刚,肖敦清,姜文亚,韩文中,等.断陷湖盆斜坡区油气富集理论与勘探实践——以黄骅坳陷古近系为例[J].中国石油勘探,2017,22(2):13-24.Zhao Xianzheng,Zhou Lihong,Pu Xiugang,Xiao Dunqing,Jiang Wenya,Han Wenzhong,et al.Hydrocarbon enrichment theory and exploration practice in the slope of fault lake basina case study of Paleogene in Huanghua depression[J].China Petroleum Exploration,2017,22(2):13-24.
[4]韩银学,陈莹,杨海长,王龙颖,沈怀磊,郭帅,等.白云凹陷恩平组“源-汇”体系及其对油气勘探的影响[J].中国石油勘探,2017,22(2):25-34.Han Yinxue,Chen Ying,Yang Haichang,Wang Longying,Shen Huailei,Guo Shuai,et al.“Source to sink”of Enping Formation and its effects on oil and gas exploration in Baiyun sag,Pearl River Mouth Basin[J].China Petroleum Exploration,2017,22(2):25-34.
[5]周心怀,赖维成,杜晓峰,加东辉.渤海海域隐蔽油气藏勘探关键技术及其应用成效[J].中国海上油气,2012,24(1):11-18Zhou Xinhuai,Lai Weicheng,Du Xiaofeng,Jia Donghui.Some key exploration techniques for the subtle reservoirs and their application in Bohai water[J].China Offshore Oil and Gas,2012,24(1):11-18
[6]米立军,张向涛,丁琳,杜家元,张韶琛.海上成熟探区中浅层岩性油气藏分布特点与勘探策略——以珠江口盆地惠州凹陷为例[J].中国石油勘探,2018,23(6):10-19.Mi Lijun,Zhang Xiangtao,Ding Lin,Du Jiayuan,Zhang Shaochen.Distribution characteristics and exploration strategy of middle-shallow lithologic reservoirs in offshore mature exploration areas:a case study on Huizhou sag in the Pearl River Mouth Basin[J].China Petroleum Exploration,2018,23(6):10-19.
[7]施和生,何敏,张丽丽,余秋华,庞雄,钟志洪,等.珠江口盆地(东部)油气地质特征、成藏规律及下一步勘探策略[J].中国海上油气,2014,26(3):11-22.Shi Hesheng,He Min,Zhang Lili,Yu Qiuhua,Pang Xiong,Zhong Zhihong,et al.Petroleum geology,reservoir-forming regularity and next exploration strategy in the eastern Pearl River Mouth Basin[J].China Offshore Oil and Gas,2014,26(3):11-22.
[8]刘金水,曹冰,徐志星,秦兰芝,徐昊,唐键程.西湖凹陷某构造花港组沉积相及致密砂岩储层特征[J].成都理工大学学报:自然科学版,2012,39(2):130-136.Liu Jinshui,Cao Bing,Xu Zhixing,Qin Lanzhi,Xu Fanghao,Tang Jiancheng.Sedimentary facies and tight sandstone reservoir characteristics of a structural Huagang Formation in Xihu depression[J].Journal of Chengdu University of Technology:Natural Science Edition,2012,39(2):130-136.
[9]张国华,张建培.东海陆架盆地构造反转特征及成因机制探讨[J].地学前缘,2015,22(1):260-270.Zhang Guohua,Zhang Jianpei.Structural inversion characteristics and genetic mechanism of the East China Sea Shelf Basin[J].Earth Science Frontiers,2015,22(1):260-270.
[10]蔡华,张建培,唐贤君.西湖凹陷断裂系统特征及其控藏机制[J].天然气工业,2014,34(10):18-26.Cai Hua,Zhang Jianpei,Tang Xianjun.Characteristics of fault system and its reservoir control mechanism in Xihu depression[J].Natural Gas Industry,2014,34(10):18-26.
[11]魏恒飞,陈践发,陈晓东,曹冰,郭望,张俊华.西湖凹陷平湖组滨海型煤系烃源岩发育环境及其控制因素[J].中国地质,2013,40(2):487-497.Wei Hengfei,Chen Jianfa,Chen Xiaodong,Cao Bing,Guo Wang,Zhang Junhua.The controlling factors and sedimentary environment for developing coastal coal-bearing source rock of Pinghu Formation in Xihu depression[J].Geology in China,2013,40(2):487-497.
[12]于兴河,李顺利,曹冰,侯国伟,王亚风,皇甫志远.西湖凹陷渐新世层序地层格架与沉积充填响应[J].沉积学报,2017,35(2):299-314.Yu Xinghe,Li Shunli,Cao Bing,Hou Guowei,Wang Yafeng,Huangfu Zhiyuan.Oligocene sequence framework and depositional response in Xihu depression,East China Sea Shelf Basin[J].Acta Sedimentologica Sinica,2017,35(2):299-314.
[13]吴嘉鹏,张兰,万丽芬,赵千慧,杨彩虹,王英民.西湖凹陷平湖组物源分析[J].中国石油勘探,2017,22(2):50-57.Wu Jiapeng,Zhang Lan,Wan Lifen,Zhao Qianhui,Yang Caihong,Wang Yingmin.Provenance analysis of Pinghu Formation in Xihu sag[J].China Petroleum Exploration,2017,22(2):50-57.
[14]许婷,侯读杰,曹冰.东海盆地西湖凹陷凝析油和轻质油生源母质剖析[J].地球化学,2015,44(3):289-300.Xu Ting,Hou Dujie,Cao Bing.Study of precursors for condensates and light oils in Xihu sag of East China Sea Basin[J].Geochemistry,2015,44(3):289-300.
[15]仝志刚,贺清,何仕斌,杨树春,熊斌辉,郝建荣.东海西湖凹陷地温场及其对烃源岩的作用[J].石油实验地质,2009,31(5):466-471,484.Tong Zhigang,He Qing,He Shibin,Yang Shuchun,Xiong Binhui,Hao Jianrong.Geothermal field and its effect on source rock in the Xihu sag,East China Sea Basin[J].Petroleum Geology&Experiment,2009,31(5):466-471,484.
[16]苏奥,陈红汉.东海盆地西湖凹陷油岩地球化学特征及原油成因来源[J].地球科学,2015,40(6):1072-1082.Su Ao,Chen Honghan.Geochemical characteristics of oil and source rock,origin and genesis of oil in Xihu depression,East China Sea Basin[J].Earth Science,2015,40(6):1072-1082.
[17]高伟中,杨彩虹,赵洪.东海盆地西湖凹陷热事件对储层的改造及其机理探讨[J].石油实验地质,2015,37(5):548-554.Gao Weizhong,Yang Caihong,Zhao Hong.Reservoir modification and its mechanism by thermal events in Xihu depression,East China Sea Basin[J].Petroleum Geology&Experiment,2015,37(5):548-554.
[18]胡明毅,沈娇,胡蝶.西湖凹陷平湖构造带平湖组砂岩储层特征及其主控因素[J].石油与天然气地质,2013,34(2):185-191.Hu Mingyi,Shen Jiao,Hu Die.Sandstone reservoir characteristics and main controlling factors of Pinghu Formation in Pinghu structural belt of Xihu depression[J].Oil&Gas Geology,2013,34(2):185-191.
[19]朱红涛,杨香华,周心怀,李建平,王德英,李敏.基于层序地层学和地震沉积学的高精度三维沉积体系:以渤中凹陷西斜坡BZ3-1区块东营组为例[J].地球科学——中国地质大学学报,2011,36(6):1073-1084.Zhu Hongtao,Yang Xianghua,Zhou Xinhuai,Li Jianping,Wang Deying,Li Min.High resolution three-dimensional facies architecture delineation using sequence stratigraphy,seismic sedimentology:example from Dongying Formation in BZ3-1 block of western slope of Bozhong sag,Bohai Bay Basin[J].Earth Science-Journal of China University of Geosciences,2011,36(6):1073-1084.
[20]朱红涛,刘可禹,朱筱敏.陆相盆地层序构型多元化体系[J].地球科学,2018,43(3):770-785.Zhu Hongtao,Liu Keyu,Zhu Xiaomin.Varieties of sequence stratigraphic configurations in continental basins[J].Earth Science,2018,43(3):770-785.
[2]赵文智,邹才能,谷志东,陶士振.砂岩透镜体油气成藏机理初探[J].石油勘探与开发,2005,34(3):273-284.Zhao Wenzhi,Zou Caineng,Gu Zhidong,Tao Shizhen.Preliminary discussion on accumulation mechanism of sand lens reservoirs[J].Petroleum Exploration and Development,2005,34(3):273-284.
[3]赵贤正,周立宏,蒲秀刚,肖敦清,姜文亚,韩文中,等.断陷湖盆斜坡区油气富集理论与勘探实践——以黄骅坳陷古近系为例[J].中国石油勘探,2017,22(2):13-24.Zhao Xianzheng,Zhou Lihong,Pu Xiugang,Xiao Dunqing,Jiang Wenya,Han Wenzhong,et al.Hydrocarbon enrichment theory and exploration practice in the slope of fault lake basina case study of Paleogene in Huanghua depression[J].China Petroleum Exploration,2017,22(2):13-24.
[4]韩银学,陈莹,杨海长,王龙颖,沈怀磊,郭帅,等.白云凹陷恩平组“源-汇”体系及其对油气勘探的影响[J].中国石油勘探,2017,22(2):25-34.Han Yinxue,Chen Ying,Yang Haichang,Wang Longying,Shen Huailei,Guo Shuai,et al.“Source to sink”of Enping Formation and its effects on oil and gas exploration in Baiyun sag,Pearl River Mouth Basin[J].China Petroleum Exploration,2017,22(2):25-34.
[5]周心怀,赖维成,杜晓峰,加东辉.渤海海域隐蔽油气藏勘探关键技术及其应用成效[J].中国海上油气,2012,24(1):11-18Zhou Xinhuai,Lai Weicheng,Du Xiaofeng,Jia Donghui.Some key exploration techniques for the subtle reservoirs and their application in Bohai water[J].China Offshore Oil and Gas,2012,24(1):11-18
[6]米立军,张向涛,丁琳,杜家元,张韶琛.海上成熟探区中浅层岩性油气藏分布特点与勘探策略——以珠江口盆地惠州凹陷为例[J].中国石油勘探,2018,23(6):10-19.Mi Lijun,Zhang Xiangtao,Ding Lin,Du Jiayuan,Zhang Shaochen.Distribution characteristics and exploration strategy of middle-shallow lithologic reservoirs in offshore mature exploration areas:a case study on Huizhou sag in the Pearl River Mouth Basin[J].China Petroleum Exploration,2018,23(6):10-19.
[7]施和生,何敏,张丽丽,余秋华,庞雄,钟志洪,等.珠江口盆地(东部)油气地质特征、成藏规律及下一步勘探策略[J].中国海上油气,2014,26(3):11-22.Shi Hesheng,He Min,Zhang Lili,Yu Qiuhua,Pang Xiong,Zhong Zhihong,et al.Petroleum geology,reservoir-forming regularity and next exploration strategy in the eastern Pearl River Mouth Basin[J].China Offshore Oil and Gas,2014,26(3):11-22.
[8]刘金水,曹冰,徐志星,秦兰芝,徐昊,唐键程.西湖凹陷某构造花港组沉积相及致密砂岩储层特征[J].成都理工大学学报:自然科学版,2012,39(2):130-136.Liu Jinshui,Cao Bing,Xu Zhixing,Qin Lanzhi,Xu Fanghao,Tang Jiancheng.Sedimentary facies and tight sandstone reservoir characteristics of a structural Huagang Formation in Xihu depression[J].Journal of Chengdu University of Technology:Natural Science Edition,2012,39(2):130-136.
[9]张国华,张建培.东海陆架盆地构造反转特征及成因机制探讨[J].地学前缘,2015,22(1):260-270.Zhang Guohua,Zhang Jianpei.Structural inversion characteristics and genetic mechanism of the East China Sea Shelf Basin[J].Earth Science Frontiers,2015,22(1):260-270.
[10]蔡华,张建培,唐贤君.西湖凹陷断裂系统特征及其控藏机制[J].天然气工业,2014,34(10):18-26.Cai Hua,Zhang Jianpei,Tang Xianjun.Characteristics of fault system and its reservoir control mechanism in Xihu depression[J].Natural Gas Industry,2014,34(10):18-26.
[11]魏恒飞,陈践发,陈晓东,曹冰,郭望,张俊华.西湖凹陷平湖组滨海型煤系烃源岩发育环境及其控制因素[J].中国地质,2013,40(2):487-497.Wei Hengfei,Chen Jianfa,Chen Xiaodong,Cao Bing,Guo Wang,Zhang Junhua.The controlling factors and sedimentary environment for developing coastal coal-bearing source rock of Pinghu Formation in Xihu depression[J].Geology in China,2013,40(2):487-497.
[12]于兴河,李顺利,曹冰,侯国伟,王亚风,皇甫志远.西湖凹陷渐新世层序地层格架与沉积充填响应[J].沉积学报,2017,35(2):299-314.Yu Xinghe,Li Shunli,Cao Bing,Hou Guowei,Wang Yafeng,Huangfu Zhiyuan.Oligocene sequence framework and depositional response in Xihu depression,East China Sea Shelf Basin[J].Acta Sedimentologica Sinica,2017,35(2):299-314.
[13]吴嘉鹏,张兰,万丽芬,赵千慧,杨彩虹,王英民.西湖凹陷平湖组物源分析[J].中国石油勘探,2017,22(2):50-57.Wu Jiapeng,Zhang Lan,Wan Lifen,Zhao Qianhui,Yang Caihong,Wang Yingmin.Provenance analysis of Pinghu Formation in Xihu sag[J].China Petroleum Exploration,2017,22(2):50-57.
[14]许婷,侯读杰,曹冰.东海盆地西湖凹陷凝析油和轻质油生源母质剖析[J].地球化学,2015,44(3):289-300.Xu Ting,Hou Dujie,Cao Bing.Study of precursors for condensates and light oils in Xihu sag of East China Sea Basin[J].Geochemistry,2015,44(3):289-300.
[15]仝志刚,贺清,何仕斌,杨树春,熊斌辉,郝建荣.东海西湖凹陷地温场及其对烃源岩的作用[J].石油实验地质,2009,31(5):466-471,484.Tong Zhigang,He Qing,He Shibin,Yang Shuchun,Xiong Binhui,Hao Jianrong.Geothermal field and its effect on source rock in the Xihu sag,East China Sea Basin[J].Petroleum Geology&Experiment,2009,31(5):466-471,484.
[16]苏奥,陈红汉.东海盆地西湖凹陷油岩地球化学特征及原油成因来源[J].地球科学,2015,40(6):1072-1082.Su Ao,Chen Honghan.Geochemical characteristics of oil and source rock,origin and genesis of oil in Xihu depression,East China Sea Basin[J].Earth Science,2015,40(6):1072-1082.
[17]高伟中,杨彩虹,赵洪.东海盆地西湖凹陷热事件对储层的改造及其机理探讨[J].石油实验地质,2015,37(5):548-554.Gao Weizhong,Yang Caihong,Zhao Hong.Reservoir modification and its mechanism by thermal events in Xihu depression,East China Sea Basin[J].Petroleum Geology&Experiment,2015,37(5):548-554.
[18]胡明毅,沈娇,胡蝶.西湖凹陷平湖构造带平湖组砂岩储层特征及其主控因素[J].石油与天然气地质,2013,34(2):185-191.Hu Mingyi,Shen Jiao,Hu Die.Sandstone reservoir characteristics and main controlling factors of Pinghu Formation in Pinghu structural belt of Xihu depression[J].Oil&Gas Geology,2013,34(2):185-191.
[19]朱红涛,杨香华,周心怀,李建平,王德英,李敏.基于层序地层学和地震沉积学的高精度三维沉积体系:以渤中凹陷西斜坡BZ3-1区块东营组为例[J].地球科学——中国地质大学学报,2011,36(6):1073-1084.Zhu Hongtao,Yang Xianghua,Zhou Xinhuai,Li Jianping,Wang Deying,Li Min.High resolution three-dimensional facies architecture delineation using sequence stratigraphy,seismic sedimentology:example from Dongying Formation in BZ3-1 block of western slope of Bozhong sag,Bohai Bay Basin[J].Earth Science-Journal of China University of Geosciences,2011,36(6):1073-1084.
[20]朱红涛,刘可禹,朱筱敏.陆相盆地层序构型多元化体系[J].地球科学,2018,43(3):770-785.Zhu Hongtao,Liu Keyu,Zhu Xiaomin.Varieties of sequence stratigraphic configurations in continental basins[J].Earth Science,2018,43(3):770-785.