油气聚集形成异常高压机理初探

doi:10.11885/j.issn.1674-5086.2019.04.17.01

摘要/Abstract

摘要： 异常高压的形成机理十分复杂，是一个未完全解决的学术难题，有待进一步深入研究。通过分析油气运移、聚集成藏与储集层排水特点，从油气"充注"动力、异常高压的定量计算、异常高压的保存与释放等方面，对油气聚集形成异常高压的机理进行了初步探索。结果表明，在生储交界处，油气运移进入储集层的主要动力为毛管压力，生油层孔隙毛管半径越小，油气从生油层向储集层"充注"的动力也越大，生油层孔隙毛管半径是影响储集层中地层压力系数最大值的重要因素之一；在一定地质历史时期，只要运移进入储集层的油气量略大于储集层排出的水量，即可形成较大的异常高压；储集层中的异常高压由盖层通过毛管压力封堵而得以保存；在油气聚集区域之外的储盖交界处不存在毛管压力，储集层可通过盖层向外排水释放压力。油气聚集形成异常高压理论，能够合理解释为什么大多数油气藏的压力高于相同深度的静水液柱压力，地层压力系数略大于1.0，但非常高的异常高压油气藏却很少的客观现实；也能够合理解释较高的异常高压的形成原因。

关键词: 油气聚集, 异常高压, 地层压力, 储集层, 机理

Abstract: The formation mechanism of abnormal high pressure is very complex, and it is an unsolved academic problem, which needs to be further studied. By analyzing the characteristics of oil and gas migration, accumulation and reservoir drainage, the mechanism of abnormal high pressure formed by oil and gas accumulation is preliminarily explored from the aspects of "filling" power of oil and gas, quantitative calculation of abnormal high pressure, preservation and release of abnormal high pressure. The results show that the main driving force of oil and gas migration into reservoir is capillary pressure at the junction of reservoir and reservoir. The smaller the radius of pore capillary, the greater the power of oil and gas "filling" from reservoir to reservoir. The radius of pore capillary is one of the important factors affecting the maximum formation pressure coefficient in reservoir. The abnormal high pressure can be formed if the oil and gas volume of reservoir is slightly larger than the water discharged from reservoir; the abnormal high pressure in reservoir can be preserved by capillary pressure plugging; there is no capillary pressure at the reservoir-cap junction outside the oil and gas accumulation area, and the reservoir can release pressure through the drainage of caprock. The theory of abnormal high pressure formed by hydrocarbon accumulation can reasonably explain the fact that the pressure of most reservoirs is higher than that of hydrostatic column at the same depth, and that the formation pressure coefficient is slightly greater than 1.0, but high abnormal high pressure reservoirs is very few; it can also reasonably explain the cause of formation of high abnormal high pressure.

Key words: oil and gas accumulation, abnormal high pressure, formation pressure, reservoir, mechanism

中图分类号:

TE122.2⁺3

胡黎明. 油气聚集形成异常高压机理初探[J]. 西南石油大学学报(自然科学版), 2020, 42(2): 118-124.

HU Liming. Preliminary Study on the Mechanism of Abnormal High Pressure Formed by Oil and Gas Accumulation[J]. 西南石油大学学报(自然科学版), 2020, 42(2): 118-124.

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参考文献

[1] 柳广弟. 石油地质学[M]. 4版. 北京:石油工业出版社, 2009:171-173, 179-182. LIU Guangdi. Petroleum geology[M]. 4th ed. Beijing:Petroleum Industry Press, 2009:171-173, 179-182.
[2] 张健,刘树根,冉波,等. 异常高压与页岩气保存[J]. 成都理工大学学报(自然科学版), 2016, 43(2):177-187. doi:10.3969/j.issn.1671-9727.2016.02.04 ZHANG Jian, LIU Shugen, RAN Bo, et al. Abnormal overpressure and shale gas preservation[J]. Journal of Chengdu University of Technology (Science & Technology Edition), 2016, 43(2):177-187. doi:10.3969/j.issn.1671-9727.2016.02.04
[3] ANISSIMOV L. Overpressure phenomena in the Precaspian Basin[J]. Petroleum Geoscience, 2001, 7(4):389-394. doi:10.1144/petgeo.7.4.389
[4] 王江涛,李育. 沉积盆地异常高压形成机制综述[J]. 石油化工应用,2014,33(1):5-9,13. doi:10.3969/j.issn.1673-5285.2014.01.002
[5] 褚庆忠,李耀华. 异常压力形成机制研究综述[J]. 天然气勘探与开发, 2001, 24(4):38-46. doi:10.3969/j.issn.1673-3177.2001.04.007
[6] 赵振宇,顾家裕,郭彦如,等. 车西洼陷沙四上亚段异常高压形成机制及其对特低渗储层特性的影响[J]. 中国石油大学学报(自然科学版), 2010, 34(5):12-17, 24. doi:10.3969/j.issn.1673-5005.2010.05.003 ZHAO Zhenyu, GU Jiayu, GUO Yanru, et al. Mechanism of generating abnormal overpressure and its influences on super-low permeability reservoirs for upper Es4 Member in Chexi Depression[J]. Journal of China University of Petroleum, 2010, 34(5):12-17, 24. doi:10.3969/j.issn.1673-5005.2010.05.003
[7] 周军良,胡勇,何康,等. 渤海海域渤中C地区中深层异常高压成因及对储层质量的影响[J]. 西安石油大学学报(自然科学版), 2017, 32(1):23-30. doi:10.3969/j.issn.1673-064X.2017.01.004 ZHOU Junliang, HU Yong, HE Kang, et al. Genesis of abnormal high pressure in mid-deep strata of C area in central Bohai sea and influence of it on reservoir quality[J]. Journal of Xi'an Shiyou University (Natural Science Edition), 2017, 32(1):23-30. doi:10.3969/j.issn.1673-064X.2017.01.004
[8] 刘成林,平英奇,郭泽清,等. 柴达木盆地西北古近系新近系异常高压形成机制分析[J]. 地学前缘, 2019(3):211-219. doi:10.13745/j.esf.sf.2018.9.4 LIU Chenglin, PING Yingqi, GUO Zeqing, et al. Genetic mechanism of overpressure in the Paleogene and Neogene in the northwestern Qaidam Basin[J]. Earth Science Frontiers, 2019(3):211-219. doi:10.13745/j.esf.sf.2018.9.4
[9] 周一博,柳广弟,钟佳倚,等. 酒泉盆地营尔凹陷下白垩统异常高压成因及模拟[J]. 中南大学学报(自然科学版), 2013, 44(6):2402-2409. ZHOU Yibo, LIU Guangdi, ZHONG Jiayi, et al. Origin and modeling of overpressure in Lower Cretaceous of Ying'er sag, Jiuquan Basin, northwest China[J]. Journal of Central South University (Science and Technology), 2013, 44(6):2402-2409.
[10] 曾联波,周天伟,吕修祥. 构造挤压对库车坳陷异常地层压力的影响[J]. 地质论评, 2004, 50(5):471-475. doi:10.3321/j.issn:0371-5736.2004.05.004 ZENG Lianbo, ZHOU Tianwei, LÜ Xiuxiang. Influence of tectonic compression on the abnormal formation pressure in the Kuqa Depression[J]. Geological Review, 2004, 50(5):471-475. doi:10.3321/j.issn:0371-5736.2004.05.004
[11] 熊建华,施豫琴,过敏. 构造挤压在川东北地区飞仙关组异常高压中的作用[J]. 矿物岩石, 2010, 30(3):83-88. doi:10.3969/j.issn.1001-6872.2010.03.011 XIONG Jianhua, SHI Yuqin, GUO Min. Effect of tectonic compression on the abnormal pressure of the Feixianguan Formation in the northeast Sichuan[J]. Journal of Mineralogy and Petrology, 2010, 30(3):83-88. doi:10.3969/j.issn.1001-6872.2010.03.011
[12] 甘军,谢玉洪,张迎朝,等. 文昌A凹陷恩平组异常高压与油气成藏关系[J]. 中国海上油气, 2014, 26(6):7-13. GAN Jun, XIE Yuhong, ZHANG Yingzhao, et al. A relationship between abnormally high pressure in Enping Formation and hydrocarbon accumulation in Wenchang A Sag[J]. China Offshore Oil and Gas, 2014, 26(6):7-13.
[13] 薛国刚,高渐珍. 东濮凹陷异常高压油气藏形成机理[J]. 新疆石油地质, 2014, 35(2):149-152. XUE Guogang, GAO Jianzhen. The formation mechanism of abnormal high pressure reservoirs in Dongpu Sag, Bohai Bay Basin[J]. Xinjiang Petroleum Geology, 2014, 35(2):149-152.
[14] 李传亮. 岩石欠压实概念质疑兼谈岩石压缩阶段排烃的不可能性[J]. 新疆石油地质, 2005, 26(4):450-452. doi:10.3969/j.issn.1001-3873.2005.04.031 LI Chuanliang. Discussion of undercompaction of rocks:And impossibility of hydrocarbon expulsion during rock compression[J]. Xinjiang Petroleum Geology, 2005, 26(4):450-452. doi:10.3969/j.issn.1001-3873.2005.04.031
[15] 周鹏高,李亚双,刘燕. 挤压作用形成异常高压的定量研究[J]. 西南石油大学学报(自然科学版), 2017, 39(3):97-102. doi:10.11885/j.issn.1674-5086.2015.08.14.02 ZHOU Penggao, LI Yashuang, LIU Yan. Quantitative study on abnormal high press by extrusion effect[J]. Journal of Southwest Petroleum University (Science & Techno-logy Edition), 2017, 39(3):97-102. doi:10.11885/j.issn.1674-5086.2015.08.14.02
[16] 夏新宇,曾凡刚,宋岩. 构造抬升是异常高压的成因吗[J]. 石油实验地质, 2002, 24(6):496-500. doi:10.3969/j.issn.1001-6112.2002.06.003 XIA Xinyu, ZENG Fangang, SONG Yan. Is tectonic uplifting the genesis of abnormal highpressure[J]. Petroleum Geology & Experiment, 2002, 24(6):496-500. doi:10.3969/j.issn.1001-6112.2002.06.003
[17] 李传亮. 地层异常压力原因分析[J]. 新疆石油地质, 2004, 25(4):443-445. doi:10.3969/j.issn.1001-3873.2004.04.031 LI Chuanliang. Analysis of abnormal reservoir pressure[J]. Xinjiang Petroleum Geology, 2004, 25(4):443-445. doi:10.3969/j.issn.1001-3873.2004.04.031
[18] 李传亮. 油藏工程原理[M]. 2版. 北京:石油工业出版社, 2011:110-112. LI Chuanliang. Reservoir Engineering Principle[M]. 2nd ed. Beijing:Petroleum Industry Press, 2011:110-112.
[19] 何更生,唐海. 油层物理[M]. 2版. 北京:石油工业出版社, 2011:255-258. HE Gengsheng, TANG Hai. Oil layer physics[M]. 2nd ed. Beijing:Petroleum Industry Press, 2011:255-258.
[20] HUNT J M. Genneration and migration of petroleum from abnormally pressured fluid compartments[J]. AAPG Bulletin, 1990, 74(1):1-12. doi:10.1306/0C9B21EB-1710-11D7-8645000102C1865D
[21] POWLEY D E. Presusures and hydrogeology in petroleum basins[J]. Earth Science Reviews, 1990, 29(1-4):215-226. doi:10.1016/0012-8252(0)90038-W
[22] 李传亮,朱苏阳,刘东华. 盖层封堵油气的机理研究[J]. 岩性油气藏, 2019, 31(1):12-19. doi:10.12108/yxyqc.20190102 LI Chuanliang, ZHU Suyang, LIU Donghua. Mechanism of sealing oil and gas with cap-rocks[J]. Lithologic Reservoirs, 2019, 31(1):12-19. doi:10.12108/yxyqc.20190102
[23] 周兴熙. 塔里木盆地克拉2气田成藏机制再认识[J]. 天然气地球科学, 2003, 14(5):354-361. doi:10.3969/j.issn.1672-1926.2003.05.005 ZHOU Xingxi. Recognition on reservoir-forming mechanism of Kela 2 Gas Field in Tarim Basin[J]. Natural Gas Geoscience, 2003, 14(5):354-361. doi:10.3969/j.issn.1672-1926.2003.05.005