渤海湾盆地渤中凹陷太古界潜山气藏BZ19-6的气源条件与成藏模式

谢玉洪

doi:10.11781/sysydz202005858

渤海湾盆地渤中凹陷太古界潜山气藏BZ19-6的气源条件与成藏模式

doi: 10.11781/sysydz202005858

谢玉洪

中国海洋石油集团有限公司, 北京 100010

基金项目:

国家科技重大专项“近海大中型油气田形成条件及勘探技术” 2016ZX05024

详细信息

作者简介:
谢玉洪(1961-), 男, 博士, 教授级高级工程师, 从事石油地质研究与油气勘探开发实践。E-mail: xieyh@cnooc.com.cn

中图分类号: TE122.3
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出版历程
- 收稿日期: 2020-04-01
- 修回日期: 2020-08-03
- 刊出日期: 2020-09-28

Gas resources and accumulation model of BZ19-6 Archean buried-hill large-scale gas reservoir in Bozhong Sag, Bohai Bay Basin

XIE Yuhong

China National Offshore Oil Corporation Limited Company, Beijing 100010, China

摘要

摘要: 传统上认为渤海湾盆地是受湖相泥岩生油母质烃源岩控制的富油型盆地，新构造断裂发育等因素不利于天然气聚集和保存。在认识渤海海域渤中凹陷发育的构造成因、演化与沉积充填特征基础上，开展了烃源岩热演化及生气产率热模拟研究，重新认识了富油型盆地在快速生烃的背景下，初次裂解气发育阶段的油气藏在深埋过程中也具备形成大型天然气藏的生烃强度。区域性分布的巨厚古近系超压泥岩，不仅防止了天然气的散失，也为天然气运移充注提供了超压动力。流体包裹体研究显示渤中凹陷普遍经历了早期油藏、晚期气藏的成藏过程。BZ19-6潜山构造由于多源高强度生气、靠近烃源的快速强充注、厚层泥岩超压封盖，形成大型高丰度凝析气藏。BZ19-6凝析气田的成藏认识和成功发现，突破了富油型盆地难以寻找大气田的认识，拓展了天然气勘探领域，对深埋古老变质岩潜山和活动断裂带天然气勘探具有重要的理论价值。
- 烃源岩热演化 /
- 封盖条件 /
- 成藏模式 /
- BZ19-6大气田 /
- 渤中凹陷 /
- 渤海海域
Abstract: Traditionally the Bohai Bay Basin is prone to oil rather than gas pooling because it is dominated by lacustrine mudstones. Factors such as the development of young structural faults are not conducive to natural gas accumulation and preservation. Based on the understanding of the dynamics, evolution, and sedimentary filling characteristics of the Bozhong Sag in the Bohai Sea area, a thermal simulation of source rock evolution and gas generation rate was carried out. Under the background of rapid hydrocarbon generation in oil-rich basins, the reservoirs in the secondary gas generation stage have the hydrocarbon generation intensity to form large natural gas reservoirs during deep burial. The regionally distributed thick Paleogene overpressure mudstones not only prevent the loss of natural gas, but also provide the drive for natural gas migration and charging. Research on fluid inclusions shows that the Bozhong Sag has generally experienced the accumulation of early oil and late gas. The BZ19-6 buried hill structure has formed a large-scale high-abundance condensate gas reservoir due to multiple sources of high-intensity gas generation, rapid and strong charging close to the hydrocarbon source, and thick mudstone overpressure sealing. The understanding and successful discovery of the BZ19-6 condensate gas field has broken through the understanding that it is difficult to find large gas fields in oil-rich basins, expanded the field of natural gas exploration, and is important for natural gas exploration in deep buried ancient metamorphic buried hills and active fault zones.
- source rock thermal evolution /
- sealing conditions /
- accumulation model /
- BZ19-6 gas field /
- Bozhong Sag /
- Bohai Sea

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图 1 渤海湾盆地渤中凹陷平面及剖面结构

Figure 1. Plane and section structure of Bozhong Sag, Bohai Bay Basin

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图 2 渤海湾盆地渤中凹陷BZ19-6构造烃源岩有机地球化学特征

Figure 2. Organic geochemical characteristics of source rocks in BZ19-6 structure in Bozhong Sag, Bohai Bay Basin

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图 3 渤海湾盆地渤中凹陷烃源岩产气率模型(a)与烃源岩生气模型(b)

Figure 3. Gas generation rate (a) and GOR (b) models of source rocks in Bozhong Sag, Bohai Bay Basin

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图 4 渤海湾盆地渤中凹陷BZ19-6凝析气藏原油的生源参数组成及油源划分

Figure 4. Biomarkers and classification of oil sources in BZ19-6 condensate gas field, Bozhong Sag, Bohai Bay Basin

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图 5 渤海湾盆地渤中烃源岩热演化史(a)与5.1 Ma前后生气面积变化(b, c)

剖面位置见图 1a的A-A′。

Figure 5. Thermal evolution history of source rocks (a) and changes in gas generation area around 5.1 Ma (b, c) in Bozhong Sag, Bohai Bay Basin

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图 6 渤海湾盆地渤中凹陷BZ19-6凝析气藏原油及气包裹体镜下显微特征

a.BZ19-6-1井，3 735 m，褐色重质油包裹体，单偏光；b.BZ19-6-1井，3 735 m，黄绿色轻质油包裹体，荧光；c.BZ19-6-1井，3 735 m，蓝白色轻质油包裹体，荧光；d.BZ19-6-1井，4 106 m，灰色天然气包裹体，单偏光

Figure 6. Microscopic characteristics of crude oil and gas inclusions in BZ19-6 condensate gas field in Bozhong Sag, Bohai Bay Basin

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图 7 渤海湾盆地渤中凹陷BZ19-6凝析气藏南北向剖面

剖面位置见图 1a B-B′。

Figure 7. North-south section of BZ19-6 condensate gas field in Bozhong Sag, Bohai Bay Basin

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参考文献(23)

[1]	朱伟林, 葛建党. 渤海海域天然气勘探前景分析[J]. 石油学报, 2001, 22(2): 8-13. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200102001.htm ZHU Weilin, GE Jiandang. Gas exploration potential in offshore Bohai Bay Basin[J]. Acta Petrolei Sinica, 2001, 22(2): 8-13. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200102001.htm
[2]	朱伟林, 米立军, 龚再升. 渤海海域油气成藏与勘探[M]. 北京: 科学出版社, 2009. ZHU Weilin, MI Lijun, GONG Zaisheng. Hydrocarbon accumulation and exploration offshore Bohai Bay Basin[M]. Beijing: Science Press, 2009.
[3]	谢玉洪, 高阳东. 中国海油近期国内勘探进展与勘探方向[J]. 中国石油勘探, 2020, 25(1): 20-30. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY202001003.htm XIE Yuhong, GAO Yangdong. Recent domestic exploration progress and direction of CNOOC[J]. China Petroleum Exploration, 2020, 25(1): 20-30. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY202001003.htm
[4]	施和生, 王清斌, 王军, 等. 渤中凹陷深层渤中19-6构造大型凝析气田的发现及勘探意义[J]. 中国石油勘探, 2019, 24(1): 36-45. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201901006.htm SHI Hesheng, WANG Qingbin, WANG Jun, et al. Discovery and exploration significance of large condensate gas fields in BZ19-6 structure in deep Bozhong Sag[J]. China Petroleum Exploration, 2019, 24(1): 36-45. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201901006.htm
[5]	周心怀, 张如才, 李慧勇, 等. 渤海湾盆地渤中凹陷深埋古潜山天然气成藏主控因素探讨[J]. 中国石油大学学报(自然科学版), 2017, 41(1): 42-50. https://www.cnki.com.cn/Article/CJFDTOTAL-SYDX201701005.htm ZHOU Xinhuai, ZHANG Rucai, LI Huiyong, et al. Major controls on natural gas accumulations in deep-buried hills in Bozhong Depression, Bohai Bay Basin[J]. Journal of China University of Petroleum (Edition of Natural Science), 2017, 41(1): 42-50. https://www.cnki.com.cn/Article/CJFDTOTAL-SYDX201701005.htm
[6]	邓运华. 渤海大中型潜山油气田形成机理与勘探实践[J]. 石油学报, 2015, 36(3): 253-261. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201503002.htm DENG Yunhua. Formation mechanism and exploration practice of large-medium buried-hill oil fields in Bohai Sea[J]. Acta Petrolei Sinica, 2015, 36(3): 253-261. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201503002.htm
[7]	夏庆龙, 田立新, 周心怀, 等. 渤海海域构造形成演化与变形机制[M]. 北京: 石油工业出版社, 2012. XIA Qinglong, TIAN Lixin, ZHOU Xinhuai, et al. The structural evolution and deformation mechanism in Bohai Bay[M]. Beijing: Petroleum Industry Press, 2012.
[8]	龚再升, 王国纯. 渤海新构造运动控制晚期油气成藏[J]. 石油学报, 2001, 22(2): 1-7. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200102000.htm GONG Zaisheng, WANG Guochun. Neotectonism and late hydrocarbon accumulation in Bohai Sea[J]. Acta Petrolei Sinica, 2001, 22(2): 1-7. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200102000.htm
[9]	李三忠, 索艳慧, 戴黎明, 等. 渤海湾盆地形成与华北克拉通破坏[J]. 地学前缘, 2010, 17(4): 64-89. https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201004009.htm LI Sanzhong, SUO Yanhui, DAI Liming, et al. Development of the Bohai Bay Basin and destruction of the North China Craton[J]. Earth Science Frontiers, 2010, 17(4): 64-89. https://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201004009.htm
[10]	赵利, 李理. 渤海湾盆地晚中生代以来伸展模式及动力学机制[J]. 中国地质, 2016, 43(2): 470-485. https://www.cnki.com.cn/Article/CJFDTOTAL-DIZI201602009.htm ZHAO Li, LI Li. The extensional pattern and dynamics of Bohai Bay Basin in Late Mesozoic-Cenozoic[J]. Geology in China, 2016, 43(2): 470-485. https://www.cnki.com.cn/Article/CJFDTOTAL-DIZI201602009.htm
[11]	MOORE G W. Plate-tectonic evolution of the Circum-Pacific region[A]//1989 AAAS Annual Meeting; 155th National Mee-ting. AAAS Publication, 1988: 155, 27.
[12]	XU Jawei, ZHU Guang, TONG Weixing, et al. Formation and evolution of the Tancheng-Lujiang wrench fault system: a major shear system to the northwest of the Pacific Ocean[J]. Tectonophysics, 1987, 134(4): 273-310.
[13]	王军, 王清斌, 王飞龙, 等. 渤海海域渤中地区烃源岩封闭金管热解模拟生烃实验研究[J]. 石油实验地质, 2017, 39(3): 423-430. doi: 10.11781/sysydz201703423 WANG Jun, WANG Qingbin, WANG Feilong, et al. Gold tube pyrolysis study of source rock hydrocarbon generation in Bozhong area, offshore Bohai Bay Basin[J]. Petroleum Geology & Experiment, 2017, 39(3): 423-430. doi: 10.11781/sysydz201703423
[14]	戴金星, 王庭斌, 宋岩, 等. 中国大中型天然气田形成条件与分布规律[M]. 北京: 地质出版社, 1997. DAI Jinxing, WANG Tingbin, SONG Yan, et al. Formation and distribution of medium-large-sized gas fields in China[M]. Beijing: Geological Publishing House, 1997.
[15]	HAO Fang, ZHOU Xinhuai, ZHU Yangming, et al. Mechanisms of petroleum accumulation in the Bozhong sub-basin, Bohai Bay Basin, China. part 1: origin and occurrence of crude oils[J]. Marine and Petroleum Geology, 2009, 26(8): 1528-1542.
[16]	岳伏生, 郭彦如, 马龙, 等. 成藏动力学系统的研究现状及发展趋向[J]. 地球科学进展, 2003, 18(1): 122-126. https://www.cnki.com.cn/Article/CJFDTOTAL-DXJZ200301017.htm YUE Fusheng, GUO Yanru, MA Long, et al. The study status and tendency of reservoir formation dynamic system[J]. Advance in Earth Sciences, 2003, 18(1): 122-126. https://www.cnki.com.cn/Article/CJFDTOTAL-DXJZ200301017.htm
[17]	陈红汉. 单个油包裹体显微荧光特性与热成熟度评价[J]. 石油学报, 2014, 35(3): 584-590. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201403026.htm CHEN Honghan. Microspectrofluorimetric characterization and thermal maturity assessment of individual oil inclusion[J]. Acta Petrolei Sinica, 2014, 35(3): 584-590. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201403026.htm
[18]	EADINGTON P J, LISK M, KRIEGER F W. Identifying oil well sites: US, 5543616[P]. 1996-08-06.
[19]	姜福杰, 姜振学, 庞雄奇, 等. 含油包裹体丰度指数确定油气运聚范围及应用[J]. 西南石油学院学报, 2006, 28(5): 15-18. https://www.cnki.com.cn/Article/CJFDTOTAL-XNSY200605003.htm JIANG Fujie, JIANG Zhenxue, PANG Xiongqi, et al. Method of determinating oil and gas migration by grains with oil inclusion and its application[J]. Journal of Southwest Petroleum Institute, 2006, 28(5): 15-18. https://www.cnki.com.cn/Article/CJFDTOTAL-XNSY200605003.htm
[20]	薛永安, 刘廷海, 王应斌, 等. 渤海海域天然气成藏主控因素与成藏模式[J]. 石油勘探与开发, 2007, 34(5): 521-528. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK200705002.htm XUE Yong'an, LIU Tinghai, WANG Yingbin, et al. Main controlling factors and mode of natural gas accumulation in Bohai Bay area[J]. Petroleum Exploration and Development, 2007, 34(5): 521-528. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK200705002.htm
[21]	付广, 庞雄奇, 姜振学, 等. 利用声波时差资料研究泥岩盖层封闭能力的方法[J]. 石油地球物理勘探, 1996, 31(4): 521-528. https://www.cnki.com.cn/Article/CJFDTOTAL-SYDQ199604006.htm FU Guang, PANG Xiongqi, JIAG Zhenxue, et al. Method for resear-ching on mud-caprock sealing ability with the use of interval transit times[J]. Oil Geophysical Prospecting, 1996, 31(4): 521-528. https://www.cnki.com.cn/Article/CJFDTOTAL-SYDQ199604006.htm
[22]	MAGARA K. Compaction and migration of fluids in Miocene mudstone, Nagaoka Plain, Japan[J]. AAPG Bulletin, 1968, 52(12): 2466-2501.
[23]	刘方槐. 盖层在气藏保存和破坏中的作用及其评价方法[J]. 天然气地球科学, 1991, 2(5): 220-227. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX199105006.htm LIU Fanghuai. The effect and its evaluation methods of cap formation to gas reservoir protection and destruction[J]. Natural Gas Geoscience, 1991, 2(5): 220-227. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX199105006.htm