Evolution of Geopressure Field in Niuzhuang Sag in Dongying Depression and Its Effect on Petroleum Accumulation
-
摘要: 东营凹陷牛庄洼陷现今的地层压力垂向分带、平面分区, 地层超压与Es4上和Es3下亚段成熟烃源岩分布密切相关, 并以洼陷周围的大型控洼断层为界, 洼陷内超压强烈, 洼陷外超压程度明显减弱.正演模拟表明, 洼陷内超压演化总体上经历了早期形成-下降调整-晚期再次增大3个阶段, 超压成因机制上从以欠压实为主发展到现今欠压实和生烃作用双重控制, 而控洼断层和Es3中亚段下部富泥型地层形成的侧向和垂向封闭, 控制了超压的空间分布状态.超压为Ed末期及Ng末-Nm二次重要成藏期的油气运移提供了重要的源动力; 超压演化与构造活动演化的相互耦合控制了牛庄洼陷附近断阶带上的油气成藏.Abstract: The present geopressure field in Niuzhuang sag in Dongying depression can be divided into dissimilar zones vertically and different areas horizontally. Overpressure is closely related to both the upper part of the fourth member and the lower part of the third member of Shahejie Formation whose source rocks matured. Large-scale faults surrounding Niuzhuang sag limit the horizontal overpressure distribution. Inside the sag it is strongly overpressured while outside it is much less overpressured. The forward modeling indicates that the overpressure evolution in the sag is divided into three stages: original-forming, meta-declining and latest-raising stages. And the main mechanism for generating overpressures evolved from undercompaction into combination of both undercompaction and hydrocarbon generation. Meanwhile, both lateral seal by large-scale faults surrounding Niuzhuang sag and vertical seal by the thick and shale-enriched bottom layer of the middle part of the third member of Shahejie Formation determined the special distribution of overpressure. The overpressure in Niuzhuang sag provided the petroleum migration with original forces in those two important accumulation periods. Coupling of overpressure evolution and tectonic activities played an active role in petroleum accumulation in the bordering faulted zone near Niuzhuang sag.
-
Key words:
- Niuzhuang sag /
- overpressure /
- evolution of geopressure field
-
图 2 牛庄洼陷Es3下亚段地层压力系数的平面分布
Fig. 2. Lateral distribution of geopressure coefficient in the lower part of the third member of Shahejie Formation in Niuzhuang sag
图 3 牛庄洼陷沉积速率、剩余压力、孔隙度和烃类转化率随时间的变化
Fig. 3. Changes of sedimentation rate, excessive pressure, porosity and hydrocarbon transformation ratio with time in Niuzhuang sag
-
[1] Gong, Y.L., Wang, L.S., Liu, S.W., et al., 2005. Mantle heat flow and deep temperature of Jiyang depression, Shandong, North China. Earth Science—Journal of China University of Geosciences, 30(1): 121-128(in Chinese with English abstract). [2] Hao, F., Dong, W.L., 2001. Evolution of fluid flow and petroleum accumulation in overpressured systems in sedimentary basins. Advance in Earth Science, 16(1): 79-85(in Chinese with English abstract). [3] Hao, F., Zou, H.Y., Jin, Z.J., et al., 2005. Kinetics of hydrocarbon generation and mechanisms of petroleum accumulation in overpressured basins. Science Press, Beijing(in Chinese). [4] Hao, F., Zou, H.Y., Wang, M.F., et al., 2002. Research advances and frontier areas of mechanisms of petroleum accumulation. Geological Science and Technology Information, 21(4): 7-14(in Chinese with English abstract). [5] Hunt, J. M., 1990. Generation and migration of petroleum from abnormally pressured fluid compartments. AAPG Bulletin, 74(1): 1-12. [6] Jiang, Y.L., Liu, H., Zhang, Y., et al., 2003. Analysis of petroleum accumulation phase in Dongying sag. Oil and Gas Geology, 24(3): 215-218(in Chinese with English abstract). [7] Li, S.P., Qiu, N.S., 2003a. Studying the paleo-geotemperature of sedimentary basin by the use of apatite fission track analysis: An example from Dongying depression. Journal of Southwest Petroleum Institute, 25(4): 4-8 (in Chinese with English abstract). [8] Li, S.P., Qiu, N.S., 2003b. Studying the palaeogeotherm of Dongying sag by using vitrinite reflectance. Journal of Xi'an Petroleum Institute(Natural Science Edition), 18(6): 9-11(in Chinese with English abstract). [9] Lin, C.S., Zheng, H.R., Ren, J.Y., et al., 2003. The control of syndepositional faulting on the Eogene sedimentary basin fills of the Dongying and Zhanhua sags, Bohai bay basin. Science in China(Ser. D), 33(11): 1025-1036 (in Chinese). [10] Miao, J.Y., Zhu, Z.Q., Liu, W.R., et al., 1999. Occurrence of organic matter and its effect on sealing ability of argillaceous rock. Acta Sedimentologica Sinica, 17(3): 478-481(in Chinese with English abstract). [11] Osborne, M.J., Swarbrick, R.E., 1997. Mechanisms for generating overpressure in sedimentary basins: A reevaluation. AAPG Bulletin, 81(6): 1023-1041. [12] Qiu, N.S., Li, S.P., Zeng, J.H., 2004. Thermal history and tectonic-thermal evolution of the Jiyang depression in the Bohai bay basin, East China. Acta Geologica Sinica, 78(2): 263-269(in Chinese with English abstract). [13] Weng, Q.P., Pang, X.Q., Leonard, J.E., 2004. Numerical modeling of lithologic deposit in the middle of the third member of the Shahejie Formation in Niuzhuang sag in Dongying depression. In: Li, P.L., Pang, X.Q., eds., Mechanisms and exploration practice of subtle reservoirs. Petroleum Industry Press, Beijing, 215-218(in Chinese). [14] Xia, X.Y., Song, Y., 2001. Temperature effects on geopressure during deposition and erosion. Petroleum Exploration and Development, 28(3): 8-11(in Chinese with English abstract). [15] Zhang, H.F., 1998. Development of petroleum geology. Petroleum Industry Press, Beijing(in Chinese). [16] Zhang, L.Y., Jiang, Y.L., Liu, H., et al., 2003. Relationship between source rock and oil accumulation in Dongying sag. Petroleum Exploration and Development, 30(3): 61-64(in Chinese with English abstract). [17] Zhu, G.Y., Jin, Q., 2003. Geochemical characteristics of two sets of excellent source rocks in Dongying depression. Acta Sedimentologica Sinica, 21(3): 506-512(in Chinese with English abstract). [18] Zhu, G.Y., Jin, Q., Dai, J.X., et al., 2004. A study on periods of hydrocarbon accumulation and distribution pattern of oil and gas pools in Dongying depression. Oil and Gas Geology, 25(2): 209-215(in Chinese with English abstract). [19] 龚育龄, 王良书, 刘绍文, 等, 2005. 济阳坳陷地幔热流和深部温度. 地球科学——中国地质大学学报, 30(1): 121-128. https://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200501017.htm [20] 郝芳, 董伟良, 2001. 沉积盆地超压系统演化、流体流动与成藏机理. 地球科学进展, 16(1): 79-85. doi: 10.3321/j.issn:1001-8166.2001.01.015 [21] 郝芳, 邹华耀, 金之钧, 等, 2005. 超压盆地生烃动力学与油气成藏机理. 北京: 科学出版社. [22] 郝芳, 邹华耀, 王敏芳, 等, 2002. 油气成藏机理研究进展和前沿研究领域. 地质科技情报, 21(4): 7-14. doi: 10.3969/j.issn.1000-7849.2002.04.003 [23] 蒋有录, 刘华, 张乐, 等, 2003. 东营凹陷油气成藏期分析. 石油与天然气地质, 24(3): 215-218. doi: 10.3321/j.issn:0253-9985.2003.03.005 [24] 李善鹏, 邱楠生, 2003a. 磷灰石裂变径迹方法研究沉积盆地古地温——以东营凹陷为例. 西南石油学院学报, 25 (4): 4-8. https://www.cnki.com.cn/Article/CJFDTOTAL-XNSY200304001.htm [25] 李善鹏, 邱楠生, 2003b. 应用镜质体反射率方法研究东营凹陷古地温. 西安石油学院学报(自然科学版), 18(6): 9-11. https://www.cnki.com.cn/Article/CJFDTOTAL-XASY200306003.htm [26] 林畅松, 郑和荣, 任建业, 等, 2003. 渤海湾盆地东营、沾化凹陷早第三纪同沉积断裂作用对沉积充填的控制. 中国科学(D辑), 33(11): 1025-1036. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK200311000.htm [27] 苗建宇, 祝总祺, 刘文荣, 等, 1999. 泥质岩有机质的附存状态及其对泥质岩封盖能力的影响. 沉积学报, 17(3): 478-481. doi: 10.3969/j.issn.1000-0550.1999.03.023 [28] 邱楠生, 李善鹏, 曾溅辉, 2004. 渤海湾盆地济阳坳陷热历史及构造一热演化特征. 地质学报, 78(2): 263-269. doi: 10.3321/j.issn:0001-5717.2004.02.016 [29] 翁庆萍, 庞雄奇, Leonard, J.E., 2004. 东营凹陷牛庄洼陷沙三段中亚段岩性油藏数值模拟研究. 见: 李丕龙, 庞雄奇. 隐蔽油气藏形成机理与勘探实践. 北京: 石油工业出版社, 215-218. [30] 夏新宇, 宋岩, 2001. 沉降及抬升过程中温度对流体压力的影响. 石油勘探与开发, 28(3): 8-11. doi: 10.3321/j.issn:1000-0747.2001.03.003 [31] 张厚福, 1998. 石油地质学新进展. 北京: 石油工业出版社. [32] 张林晔, 蒋有录, 刘华, 等, 2003. 东营凹陷油源特征分析. 石油勘探与开发, 30(3): 61-64. doi: 10.3321/j.issn:1000-0747.2003.03.017 [33] 朱光有, 金强, 2003. 东营凹陷两套优质烃源岩层地质地球化学特征研究. 沉积学报, 21(3): 506-512. doi: 10.3969/j.issn.1000-0550.2003.03.022 [34] 朱光有, 金强, 戴金星, 等, 2004. 东营凹陷油气成藏期次及其分布规律研究. 石油与天然气地质, 25(2): 209-215. doi: 10.3321/j.issn:0253-9985.2004.02.016 -
下载:
点击查看大图
图(4)
计量
- 文章访问数: 2912
- HTML全文浏览量: 102
- PDF下载量: 278
- 被引次数: 0
