Exploration and development enlightenments from the discovery of Bozhong 34-9 Oilfield in southern Bohai Sea

doi:10.3969/j.issn.1672-7703.2023.02.006

Abstract

Abstract: Bozhong 34-9 Oilfield is characterized by the first Cenozoic sandstone oil reservoir discovered in Bohai Sea by 2022 that affected by igneous rocks the most, as well as the first in offshore oilfield development in China. Therefore, the fine identification of igneous rocks and its lateral sealing capacity for sandstone reservoir are very crucial to the high-efficiency oilfield development.By fully using core, thin section, well drilling, logging, and forward modeling data, igneous rock facies are finely characterized and identification chart is established in Bohai Sea area. The sealing capacity of igneous rocks is evaluated from aspects of petrology and logging physical property characterization, which indicates that the lithologic-structural oil reservoir is dominated in the study area,and igneous rocks mainly segment and seal oil traps. Specially, the lateral sealing capacity of igneous rocks is evaluated, the pattern of igneous rocks laterally sealing sandstone trap is summarized, and potential area is proposed. The study results show that volcanic conduit facies, intrusive facies and overflow facies igneous rocks were mainly developed in the study area, and three patterns of igneous rocks laterally sealing sandstone trap are identified, i.e., lateral sealing by dike, lateral sealing by stratified igneous rock mass or lateral non-sealing by stratified igneous rock mass. The first two types of igneous rocks lateral sealing patterns have favorable conditions for further evaluation. A total of 78 development wells have successfully been implemented in the oilfield, which enriches the exploration and development technical means of sandstone oil reservoirs in the igneous area in Bohai Sea area, and has important guiding significance for the exploration and development of similar oilfields at home and abroad.

CLC Number:

TE122.1

Cui Mingzhe, Li Chao, Yuan Xun, Wu Qiongyuan, Cao Long. Exploration and development enlightenments from the discovery of Bozhong 34-9 Oilfield in southern Bohai Sea[J]. China Petroleum Exploration, 2023, 28(2): 57-69.

References

[1] 邹才能，赵文智，贾承造，等. 中国沉积盆地火山岩油气藏形成与分布[J]. 石油勘探与开发，2008,35(3):257-271.
Zou Caineng, Zhao Wenzhi, Jia Chengzao， et al . Formation and distribution of volcanic hydrocarbon reservoirs in sedimentary basins of China[J]. Petroleum Exploration and Development, 2008,35(3):257-271.
[2] 左国平，屠小龙，夏九峰，等. 大丰兴化地区火山岩地震识别方法研究[J]. 石油物探，2011,50(3):252-259.
Zuo Guoping, Tu Xiaolong, Xia Jiufeng, et al . Seismic identification of volcanic in Dafengxinghua area[J]. Geophysical Prospecting for Petroleum, 2011,50(3):252-259.
[3] 闫奎邦，李鸿，邓传伟，等.WLT 地区深层火山岩储层地震识别与描述[J]. 石油物探，2008,47(3):256-261.
Yan Kuibang, Li Hong, Deng Chuanwei， et al . Seismic recognition and description of deeply buried volcanics reservoirs in WLT area[J]. Geophysical Prospecting for Petroleum, 2008,47(3):256-261.
[4] 王璞珺，迟元林，刘万洙，等. 松辽盆地火山岩相：类型、特征和储层意义[J]. 吉林大学学报( 地球科学版), 2003,33(4):449-456.
Wang Pujun, Chi Yuanlin, Liu Wanzhu, et al . Volcanic facies of the Songliao Basin:classification, characteristics and reservoir significance[J]. Journal of Jilin University(Earth Science Edition), 2003,33(4):449-456.
[5] 谢玉洪. 中国海油“十三五”油气勘探重大成果与“十四五”前景展望[J]. 中国石油勘探，2021,26(1):43-54.
Xie Yuhong. China National Offshore Oil Corporation: Major achievements in oil and gas exploration during the“13th Five-Year Plan”period and prospects for the“14th Five-Year Plan”period[J]. China Petroleum Exploration, 2021,26(1):43-54.
[6] 谭忠健，胡云，袁亚东，等. 渤海海域裂缝性地层井漏机理研究：以渤中34-9 油田为例[J]. 中国石油勘探，2021,26(2):127-136.
Tan Zhongjian, Hu Yun, Yuan Yadong, et al . Study on lost circulation mechanism in fractured formation: a case study of BZ34-9 Oilfield, Bohai Sea, East China[J]. China Petroleum Exploration, 2021,26(2):127-136.
[7] 邓运华，徐建永，孙立春，等. 国家科技重大专项支撑中国海油增储上产[J]. 石油科技论坛，2021,40(3):56-71.
Deng Yunhua, Xu Jianyong, Sun Lichun, et al . National Science and Technology Major Project supports CNOOC for increase of its offshore oil reserves and production[J]. Petroleum Science and Technology Forum, 2021,40(3):56-71.
[8] 李树博，郭旭光，郑孟林，等. 准噶尔盆地东部西泉地区石炭系火山岩岩性识别[J]. 岩性油气藏，2021,33(1):258-266.
Li Shubo, Guo Xuguang, Zheng Menglin, et al . Lithology identification of Carboniferous volcanic rocks in Xiquan area,eastern Junggar Basin[J]. Lithologic Reservoirs, 2021,33(1):258-266.
[9] 黄芸，石星，陈勇，等. 准噶尔盆地石炭系火山岩( 相) 识别技术：以五彩湾凹陷石炭系勘探为例[J]. 特种油气藏，2011,18(2):18-22.
Huang Yun, Shi Xing, Chen Yong, et al . Identification of the Carboniferous volcanic rock (facies) in the Junggar Basin: an example from the Wucaiwan Sag[J]. Special Oil & Gas Reservoirs, 2011,18(2):18-22.
[10] 汪莉彬，马爱钰，黄程，等. 中拐凸起石炭系火山岩油藏滚动勘探关键技术[J]. 特种油气藏，2018,25(5):39-44.
Wang Libin, Ma Aiyu, Huang Cheng, et al . Key techniques for rolling exploration of Carboniferous volcanic reservoirs in Zhongguai bulge[J]. Special Oil & Gas Reservoirs, 2018,25(5):39-44.
[11] 张璐，李剑，宋永，等. 准噶尔盆地石炭系火山岩天然气成藏特征及勘探潜力[J]. 中国石油勘探，2021,26(6):141-151.
Zhang Lu, Li Jian, Song Yong, et al . Gas accumulation characteristics and exploration potential of the Carboniferous volcanic rocks in Junggar Basin[J]. China Petroleum Exploration, 2021,26(6):141-151.
[12] 刘宝鸿，张斌，郭强，等. 辽河坳陷东部凹陷深层火山岩气藏的发现与勘探启示[J]. 中国石油勘探，2020,25(3):33-43.
Liu Baohong, Zhang Bin, Guo Qiang, et al . Discovery and exploration inspiration of deep volcanic gas reservoirs in eastern sag of Liaohe Depression[J]. China Petroleum Exploration,2020,25(3):33-43.
[13] 徐贵忠. 渤海裂谷中生代火山岩特征及其地质意义[J]. 岩石学报，1986,2(1):83-92.
Xu Guizhong. Characteristics of the mesozoic volcanic rocks in Bohai rift and their geological significance[J]. Acta Petrologica Sinica, 1986,2(1):83-92.
[14] 孟卫工，陈振岩，张斌，等. 辽河坳陷火成岩油气藏勘探关键技术[J].中国石油勘探, 2015,20(3):45-57.
Meng Weigong, Chen Zhenyan, Zhang Bin, et al . Key technology for exploration of igneous reservoirs in Liaohe Basin[J]. China Petroleum Exploration, 2015,20(3):45-57.
[15] 李继亭，曾溅辉，吴嘉鹏. 利用东营凹陷典型剖面分析地层压力演化与油气成藏关系[J]. 岩性油气藏，2011,23(4):58-64.
Li Jiting, Zeng Jianhui, Wu Jiapeng. Application of typical profile to analysis of reservoir pressure evolution and hydrocarbon accumulation in Dongying Sag[J]. Lithologic Reservoirs, 2011,23(4):58-64.
[16] 彭真明，肖慈珣，杨斌，等. 地震、测井联合预测地层压力的方法研究[J]. 石油地球物理勘探，2000,35(2):170-174.
Peng Zhenming, Xiao Cixun, Yang Bin, et al . A method for formation pressure prediction using seismic and logging data[J].Oil Geophysical Prospecting, 2000,35(2):170-174.
[17] 陈斌，邓运华，郝芳，等. 黄河口凹陷BZ34 断裂带油气晚期快速成藏模式[J]. 石油学报，2006,27(1):37-41.
Chen Bin, Deng Yunhua, Hao Fang, et al . Late-stage rapid petroleum accumulation model of BZ34 fault zone in Huanghekou Sag[J]. Acta Petrolei Sinica , 2006,27(1):37-41.
[18] 田忠华，王伟，刘平华. 中国东部新太古代末期构造演化：来自古老陆核构造恢复的启示[J]. 岩石矿物学杂志，2022,41(4):681-694.
Tian Zhonghua, Wang Wei, Liu Pinghua. Late Neoarchean tectonic evolution in eastern China: enlightenment from the ancient continental core restoration[J].　Acta Petrologica et Mineralogica, 2022,41(4):681-694.
[19] 李慧勇，肖述光，李飞，等. 渤海郯庐断裂西支构造特征及对潜山形成的控制作用[J]. 地质科技通报，2021,40(5):33-41.
Li Huiyong, Xiao Shuguang, Li Fei, et al . Structural characteristics of the Western Branch of the Tanlu fault in Bohai Sea and its control on the formation of buried hills[J].Bulletin of Geological Science and Technology, 2021,40(5):33-41.
[20] 陈登超，杨贵丽，马立驰，等. 潍北凹陷走滑断裂体系特征及其控藏作用[J]. 地质学报，2020,94(8):2410-2421.
Chen Dengchao, Yang Guili, Ma Lichi, et al . Characteristics of the strike-slip fault system and their control actions on the hydrocarbon accumulation for Weibei Sag[J]. Acta Geologica Sinica, 2020,94(8):2410-2421.
[21] 王存志. 营潍断裂西支新生代构造演化与油气聚集[J]. 中国海上油气，1992,6(6):17-25.
Wang Cunzhi. The evolution of cenozoic structure and the accumulation of oil and gas in the west branch of Yingwei fault zone[J]. China Offshore Oil and Gas, 1992,6(6):17-25.
[22] 王保全，王志萍，汤国民，等. 渤海海域中部地区中生界火山岩储层特征及主控因素[J]. 海洋地质前沿，2020,36(8):36-42.
Wang Baoquan, Wang Zhiping, Tang Guomin, et al .Characteristics of Mesozoic volcanic reservoir rocks and their main controlling factors in the Central Bohai Sea[J]. Marine Geology Frontiers, 2020,36(8):36-42.
[23] 康长生，梁德华，廖志良. 东太平洋海盆海山玄武岩特征[J]. 海洋地质与第四纪地质，1997,17(2):73-82.
Kang Changsheng, Liang Dehua, Liao Zhiliang. Characteristics of seamount basalts from the east Pacific Basin[J]. Marine Geology & Quaternary Geology, 1997,17(2):73-82.
[24] 宋吉杰. 松辽盆地北部兴城地区火山岩地震预测[J]. 石油地球物理勘探，2007,42(3):315-317.
Song Jijie. Seismic prediction of volcanite in Xincheng area of northern part of Songliao Basin[J]. Oil Geophysical Prospecting, 2007,42(3):315-317.
[25] 曾富英，罗霞，肖红平，等. 松辽盆地深层火山岩体的地震综合识别及预测[J]. 勘探地球物理进展，2009,32(4):270-274.
Zeng Fuying, Luo Xia, Xiao Hongping, et al . Integrated seismic identification and prediction of deep volcanic rock bodies in Songliao Basin[J]. Progress in Exploration Geophysics, 2009,32(4):270-274.
[26] 徐颖新，喻林，孙立志，等. 火山岩体识别技术在辽东凹陷的应用[J].石油地球物理勘探，2012,47( 增刊1):40-44.
Xu Yingxin, Yu Lin, Sun Lizhi, et al . Volcanic rock identification in Liaodong Sag[J]. Oil Geophysical Prospecting,2012,47(S1): 40-44.
[27] 姜传金. 深海火山岩地球物理响应及储层预测技术研究[D]. 大庆：东北石油大学，2012.
Jiang Chuanjin. Study of geophysical response and reservior prediction of deep volcanic rocks[D]. Daqing: Northeast Petroleum University, 2012.
[28] 司学强，陈薇，杨志力，等. 火山岩岩相—地震相响应关系及其应用：以三塘湖盆地马朗凹陷哈尔加乌组为例[J]. 岩性油气藏，2012,24(2):53-60.
Si Xueqiang, Chen Wei, Yang Zhili, et al . Response relation between volcanic lithofacies and seismic facies and its application: a case study from Haerjiawu Formation in Malang Sag,Santanghu Basin[J]. Lithologic Reservoirs, 2012,24(2):53-60.