Geological characteristics and exploration practice of deep carbonate buried hills in Nanpu Sag, Bohai Bay Basin
-
摘要: 渤海湾盆地南堡凹陷深层碳酸盐岩潜山广泛分布，经历了多期构造演化，具有洼隆相间的构造格局，在多个构造带多个层系均获得勘探发现。近年来随着勘探的深入，在斜坡带和下倾部位部署的多口探井落空，深层潜山勘探陷入停滞。为进一步明确潜山勘探潜力与勘探方向，在提高地震资料品质基础上，从供烃窗口与供烃方式、优质储层类型、圈闭类型三大成藏要素入手，开展成藏条件再评价与成藏主控因素再认识。南堡凹陷深层古生界碳酸盐岩潜山发育多套储盖组合，储层物性好，优质烃源岩发育，油气成藏条件优越。油气富集受供烃方式和供烃窗口、圈闭类型和储层等多重因素控制，油气藏类型多样。供烃窗口控制油气成藏，圈闭类型决定油气藏类型，受多期岩溶作用产生的断裂裂缝—表生岩溶和裂缝—埋藏岩溶形成优势储层控制富集高产。通过成藏条件的综合评价，明确了南堡1、2号构造带斜坡区和洼槽区残丘潜山、南堡2号和南堡3号构造带寒武系内幕潜山是下步重要勘探方向。通过地质研究与勘探技术的集成应用，分类评价了一批有利勘探目标，南堡凹陷碳酸盐岩潜山勘探获得了整体突破，取得了较好勘探成效。Abstract: The deep carbonate buried hills are widely distributed in the Nanpu Sag of Bohai Bay Basin. They have experienced multiple stages of tectonic movement and show a tectonic pattern of alternating sub-sags and uplifts. Exploration discoveries have been achieved in multiple structural belts and layers. In recent years, with the deepening of exploration, many exploratory wells deployed on the slope belt and the downdip area were failed, and the exploration of deep buried hills has stagnated. To clarify the potential and exploration direction of buried hills, on the basis of improvement of seismic data, starting from the three major accumulation elements of hydrocarbon supply window and supply mode, high-quality reservoir type and trap type, the re-evaluation of accumulation conditions and the re-understanding of main controlling factors of accumulation were carried out. The deep Paleozoic carbonate buried hills in the Nanpu Sag develop multiple sets of reservoir-caprock assemblages, [JP] with good physical properties, high-quality source rocks, and favorable hydrocarbon accumulation conditions. Oil and gas enrichment is controlled by multiple factors such as hydrocarbon supply mode, window, type of trap and reservoir, and there are various types of oil and gas reservoirs. The hydrocarbon supply window controls the formation of hydrocarbon accumulation, the type of trap determines the type of oil and gas reservoir, and the dominant reservoirs formed by fault fracture-supergenic karst and fracture-burial karst generated by multi-stage karstification control the enrichment and high yield. The comprehensive evaluation of the accumulation conditions shows that the slope area and the trough area of the Nanpu No. 1 and No. 2 structural belts as well as the inner Cambrian buried hills of the Nanpu No. 2 and Nanpu No. 3 structural belts are important directions for the next exploration. Through the integrated application of geological research and exploration technology, several favorable[JP] exploration targets have been classified and evaluated. Overall breakthroughs have been made in the exploration of carbonate buried hills in the Nanpu Sag, and good exploration results have been achieved.
-
图 1 渤海湾盆地南堡凹陷潜山构造单元及其古生界综合柱状图
a.潜山构造纲要；b.地层剖面；c.下古生界综合柱状图
Figure 1. Buried-hills and comprehensive histogram of Paleozoic in Nanpu Sag, Bohai Bay Basin
图 2 渤海湾盆地南堡凹陷潜山构造演化
Figure 2. Tectonic evolution of buried hills in Nanpu Sag, Bohai Bay Basin
图 3 渤海湾盆地南堡凹陷古生界碳酸盐岩潜山油气成藏模式
Figure 3. Hydrocarbon accumulation in carbonate buried hills in Paleozoic, Nanpu Sag, Bohai Bay Basin
图 4 渤海湾盆地南堡凹陷碳酸盐岩潜山主要圈闭类型
Figure 4. Main trap types of carbonate buried hills in Nanpu Sag, Bohai Bay Basin
图 5 渤海湾盆地南堡凹陷古生界碳酸盐岩储层微观特征
a.角砾灰岩发育溶蚀孔洞，NP1-5井，3 955.55~3 960.58 m，下马家沟组；b.构造溶蚀缝，NP1-5井，3 962.54 m，下马家沟组，泥晶砂屑灰岩；c.发育晚期构造缝充填油，NP1-5井，3 962.54 m，下马家沟组；d.内幕潜山发育高角度裂缝，NP3-80井，5 681.21~5 682.59 m，毛庄组，褐灰色荧光白云质灰岩；e.内幕潜山发育溶蚀孔，NP3-80井，5 682.6 m，毛庄组，白云质灰岩；f.FMI测井指示发育裂缝，NP1-80井，3 760 m，凤山组+长山组，白云质灰岩；g.FMI测井指示发育溶洞，南堡1-85井，4 082 m，下马家沟组，含泥细晶灰岩
Figure 5. Microscopic characteristics of carbonate reservoirs in Paleozoic, Nanpu Sag, Bohai Bay Basin
图 6 渤海湾盆地南堡凹陷下古生界表生岩溶和埋藏岩溶模式
Figure 6. Patterns of epigenetic and buried karsts in Lower Paleozoic, Nanpu Sag, Bohai Bay Basin
-
[1] 周海民, 董月霞, 刘蕴华, 等. 冀东南堡凹陷精细勘探实践与效果[J]. 中国石油勘探, 2003, 8(1): 11-15. doi: 10.3969/j.issn.1672-7703.2003.01.002ZHOU Haimin, DONG Yuexia, LIU Yunhua, et al. Precise exploration practice and results of Nanpu Depression in Jidong Oilfield[J]. China Petroleum Exploration, 2003, 8(1): 11-15. doi: 10.3969/j.issn.1672-7703.2003.01.002 [2] 贾承造. 中国叠合盆地形成演化与中下组合油气勘探潜力[J]. 中国石油勘探, 2006, 11(1): 1-4. doi: 10.3969/j.issn.1672-7703.2006.01.001JIA Chengzao. Evolution of superimposed basin and exploration potential of its middle and lower oil/gas combinations in China[J]. China Petroleum Exploration, 2006, 11(1): 1-4. doi: 10.3969/j.issn.1672-7703.2006.01.001 [3] 王政军, 马乾, 赵忠新, 等. 南堡凹陷深层火山岩天然气成因与成藏模式[J]. 石油学报, 2012, 33(5): 772-780. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201205006.htmWANG Zhengjun, MA Qian, ZHAO Zhongxin, et al. Natural gas origin and gas accumulation model for deep volcanic rocks in Nanpu Sag, Bohai Bay Basin[J]. Acta Petrolei Sinica, 2012, 33(5): 772-780. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201205006.htm [4] 翟光明, 何文渊. 渤海湾盆地资源潜力和进一步勘探方向的探讨[J]. 石油学报, 2002, 23(1): 1-5. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200201000.htmZHAI Guangming, HE Wenyuan. Potential resources and future exploration orientation in Bohai Bay Basin[J]. Acta Petrolei Sinica, 2002, 23(1): 1-5. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB200201000.htm [5] WANG Zhengjun, ZHOU He, ZHANG Yongchao, et al. Origin and accumulation model of natural gas in Ordovician buried hill reservoirs in the Nanpu Sag, Bohai Bay Basin[J]. Acta Geologica Sinica, 2013, 87(S1): 597-599. [6] 郑红菊, 董月霞, 王旭东, 等. 渤海湾盆地南堡富油气凹陷烃源岩的形成及其特征[J]. 天然气地球科学, 2007, 18(1): 78-83. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX200701016.htmZHENG Hongju, DONG Yuexia, WANG Xudong, et al. The generation and characteristics of source rocks in Nanpu oil-rich depression, Bohai Bay Basin[J]. Natural Gas Geoscience, 2007, 18(1): 78-83. https://www.cnki.com.cn/Article/CJFDTOTAL-TDKX200701016.htm [7] ZHU Guangyou, WANG Zhengjun, CAO Zhonghong. Origin and source of the Cenozoic gas in the beach area of the Nanpu Sag, Bohai Bay Basin, China[J]. Energy Exploration & Exploitation, 2014, 32(1): 93-111. [8] 李素梅, 董月霞, 王政军, 等. 南堡凹陷潜山原油特征与成因探讨[J]. 沉积学报, 2014, 32(2): 376-384. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB201402022.htmLI Sumei, DONG Yuexia, WANG Zhengjun, et al. Characteristics and formation mechanism of deep oils from Nanpu Depression, Bohai Bay Basin[J]. Acta Sedimentologica Sinica, 2014, 32(2): 376-384. https://www.cnki.com.cn/Article/CJFDTOTAL-CJXB201402022.htm [9] 刁帆, 王建伟, 陈晓娜, 等. 渤海湾盆地南堡凹陷高尚堡地区油源对比及高蜡油成因[J]. 石油实验地质, 2020, 42(1): 117-125. doi: 10.11781/sysydz202001117DIAO Fan, WANG Jianwei, CHEN Xiaona, et al. Correlation of oils and source rocks and genesis of high wax oils in Gaoshangpu area, Nanpu Sag, Bohai Bay Basin[J]. Petroleum Geology & Experiment, 2020, 42(1): 117-125. doi: 10.11781/sysydz202001117 [10] 康玉柱. 中国古生代碳酸盐岩古岩溶储集特征与油气分布[J]. 天然气工业, 2008, 28(6): 1-12. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200806003.htmKANG Yuzhu. Characteristics and distribution laws of paleokarst hydrocarbon reservoirs in Palaeozoic carbonate formations in China[J]. Natural Gas Industry, 2008, 28(6): 1-12. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQG200806003.htm [11] 董月霞, 周海民, 夏文臣. 南堡凹陷火山活动与裂陷旋回[J]. 石油与天然气地质, 2000, 21(4): 304-307. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200004003.htmDONG Yuexia, ZHOU Haimin, XIA Wenchen. Volcanic activities and rift-subsidence cycles in Nanpu Sag[J]. Oil & Gas Geology, 2000, 21(4): 304-307. https://www.cnki.com.cn/Article/CJFDTOTAL-SYYT200004003.htm [12] 赵贤正, 金凤鸣, 崔周旗, 等. 冀中坳陷隐蔽型潜山油藏类型与成藏模拟[J]. 石油勘探与开发, 2012, 39(2): 137-143. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201202003.htmZHAO Xianzheng, JIN Fengming, CUI Zhouqi, et al. Types of subtle buried-hill oil reservoirs and their accumulation simulation in Jizhong Depression, Bohai Bay Basin[J]. Petroleum Exploration and Development, 2012, 39(2): 137-143. https://www.cnki.com.cn/Article/CJFDTOTAL-SKYK201202003.htm [13] 杜金虎, 赵贤正, 张以明, 等. 牛东1风险探井重大发现及其意义[J]. 中国石油勘探, 2012, 17(1): 1-8. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201201003.htmDU Jinhu, ZHAO Xianzheng, ZHANG Yiming, et al. Great discovery made in risk exploration of Niudong1 well and its significance[J]. China Petroleum Exploration, 2012, 17(1): 1-8. https://www.cnki.com.cn/Article/CJFDTOTAL-KTSY201201003.htm [14] 于海波, 王德英, 牛成民, 等. 渤海海域渤南低凸起碳酸盐岩潜山储层特征及形成机制[J]. 石油实验地质, 2015, 37(2): 150-156. doi: 10.11781/sysydz201502150YU Haibo, WANG Deying, NIU Chengmin, et al. Characteristics and formation mechanisms of buried hill carbonate reservoirs in Bonan Low Uplift, Bohai Bay[J]. Petroleum Geology & Experiment, 2015, 37(2): 150-156. doi: 10.11781/sysydz201502150 [15] 彭先锋, 邓虎成, 何建华, 等. 鄂尔多斯盆地大牛地气田中奥陶统马家沟组裂缝特征及成因[J]. 石油实验地质, 2022, 44(1): 41-50. doi: 10.11781/sysydz202201041PENG Xianfeng, DENG Hucheng, HE Jianhua, et al. Characteristics and genesis of fractures in Middle Ordovician Majiagou Formation, Daniudi gas field, Ordos Basin[J]. Petroleum Geology & Experiment, 2022, 44(1): 41-50. doi: 10.11781/sysydz202201041 [16] 李勇, 邓美洲, 李国蓉, 等. 川西龙门山前带雷口坡组四段古表生期大气水溶蚀作用对储集层的影响[J]. 石油实验地质, 2021, 43(1): 56-63. doi: 10.11781/sysydz202101056LI Yong, DENG Meizhou, LI Guorong, et al. Palaeokarst characte-ristics and effects on reservoirs in the fourth member of Leikoupo Formation, Longmen Mountain front, western Sichuan Basin[J]. Petroleum Geology & Experiment, 2021, 43(1): 56-63. doi: 10.11781/sysydz202101056 [17] 刘军, 陈强路, 王鹏, 等. 塔里木盆地顺南地区中下奥陶统碳酸盐岩储层特征与主控因素[J]. 石油实验地质, 2021, 43(1): 23-33. doi: 10.11781/sysydz202101023LIU Jun, CHEN Qianglu, WANG Peng, et al. Characteristics and main controlling factors of carbonate reservoirs of Middle-Lower Ordovician, Shunnan area, Tarim Basin[J]. Petroleum Geology & Experiment, 2021, 43(1): 23-33. doi: 10.11781/sysydz202101023 [18] 杨一珉, 罗健, 徐云龙, 等. 渤南低凸起下古生界碳酸盐岩潜山储层特征及控制因素[J]. 断块油气田, 2020, 27(4): 448-453. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202004010.htmYANG Yimin, LUO Jian, XU Yunlong, et al. Reservoir characteristics and controlling factors of carbonate buried hill in the Lower Paleozoic of Bonan low uplift[J]. Fault-Block Oil and Gas Field, 2020, 27(4): 448-453. https://www.cnki.com.cn/Article/CJFDTOTAL-DKYT202004010.htm [19] 王拥军, 张宝民, 董月霞, 等. 南堡凹陷奥陶系潜山岩溶塌陷体识别、储层特征及油气勘探前景[J]. 石油学报, 2012, 33(4): 570-580. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201204006.htmWANG Yongjun, ZHANG Baomin, DONG Yuexia, et al. Identification, reservoir characteristics and hydrocarbon exploration prospect of karstic collapsed systems of Ordovician buried hills in Nanpu Sag, Bohai Bay Basin[J]. Acta Petrolei Sinica, 2012, 33(4): 570-580. https://www.cnki.com.cn/Article/CJFDTOTAL-SYXB201204006.htm -
下载:
图(7)
计量
- 文章访问数: 366
- HTML全文浏览量: 96
- PDF下载量: 52
- 被引次数: 0
苏公网安备32021102000780号