A Study on Seismic Reflection Characteristics of Reservoir Under Complex Lithology Background

doi:10.11885/j.issn.1674-5086.2020.11.27.03

Abstract

Abstract: 51.62$\times$10$^4$ m$^3$ of gas was obtained of the risk explororation Well JT1 from the Canglangpu Formation on the northern slope of the paleouplift in Central Sichuan during test. That is the first breakthrough in oil and gas exploration of Canglangpu Formation in Sichuan Basin. However, as the mixed sedimentary facies, the Canglangpu Formation has complex seismic response characteristics of which results in low degree of geophysical study due to its complex lithology. Thus, the seismic reflection characteristics of lithofacies and seismic response model of reservoirs of Cangchuan Formation in central Sichuan Basin are studied based on the drilling data and seismic data. The results show: 1) Canglangpu Formation in Central Sichuan has five lithofacies-seismic reflection modes, among which uniaxial mode and uniaxial complex wave model are the best seismic facies of carbonate rocks. 2) SOM waveform clustering method and wave impedance recursive inversion verify the accuracy of seismic facies, so the carbonate rocks can be further finely depicted. 3) there are two seismic reflection modes of high-quality reservoirs in Canglangpu Formation on the north slope of the paleouplift in central Sichuan Basin. The seismic reflection model of thin-interbedded reservoir is lithologic interface strong axis with complex wave, the seismic reflection model of thick reservoir is lithologic interface strong axis with bright spot. Comprehensive study shows that there are three favorable areas distribute in the shape of stripe in the NW--SE direction in Canglangpu Formation on the north slope and have good conditions for the formation of lithologic traps, with a total area of 1 270 ${\rm {km}}^2$, which is an important area for further exploration. In this paper, one method for research of seismic reflection characteristics of reservoir under complex lithology background is proposed to provide an effective idea for seismic prediction of thin reservoirs as sedimentary facies.

Key words: hybrid facies, central Sichuan Basin, Canglangpu Formation, seismic reflection pattern, wave impedance inversion

CLC Number:

TE122

DAI Ruixue, XI Cheng, RAN Qi, CHEN Kang, LIANG Han. A Study on Seismic Reflection Characteristics of Reservoir Under Complex Lithology Background[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(2): 21-31.

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References

[1] 王文之,范毅,赖强,等.四川盆地下寒武统沧浪铺组白云岩分布新认识及其油气地质意义[J].天然气勘探与开发,2018,41(1):1-7. doi:10.12055/gaskk.issn.1673-3177.2018.01.001 WANG Wenzhi, FAN Yi, LAI Qiang, et al. A new understanding of dolomite distribution in the Lower Cambrian Canglangpu Formation of Sichuan Basin:Implication for petroleum geology[J]. Natural Gas Exploration and Development, 2018, 41(1):1-7. doi:10.12055/gaskk.issn.1673-3177.2018.01.001
[2] 彭军,褚江天,陈友莲,等.四川盆地高石梯-磨溪地区下寒武统沧浪铺组沉积特征[J].岩性油气藏,2020,32(4):12-22. doi:10.12108/yxyqc.20200402 PENG Jun, CHU Jiangtian, CHEN Youlian, et al. Sedimentary characteristics of Lower Cambrian Canglangpu Formation in Gaoshiti-Moxi Area, Sichuan Basin[J]. Lithologic Reservoirs, 2020, 32(4):12-22. doi:10.12108/yxyqc.20200402
[3] 杜金虎,汪泽成,邹才能,等.古老碳酸盐岩大气田地质理论与勘探实践[M].北京:石油工业出版社,2015. DU Jinhu, WANG Zecheng, ZOU Caineng, et al. Geological theory and exploration practice of earlier carbonate giant gas field[M]. Beijing:Petroleum Industry Press, 2015.
[4] 杜金虎,张宝民,汪泽成,等.四川盆地下寒武统龙王庙组碳酸盐缓坡双颗粒滩沉积模式及储层成因[J].天然气工业,2016,36(6):1-10. doi:10.3787/j.issn.1000-0976.2016.06.001 DU Jinhu, ZHANG Baomin, WANG Zecheng, et al. Sedimentary mode and reservoirgenesis of two grain shoals at the Lower Cambrian Longwangmiao Fm carbonate ramp in the Sichuan Basin[J]. Natural Gas Industry, 2016, 36(6):1-10. doi:10.3787/j.issn.1000-0976.2016.06.001
[5] 李皎,何登发.四川盆地及邻区寒武纪古地理与构造-沉积环境演化[J].古地理学报,2014,16(4):441-460. doi:10.7605/gdlxb.2014.04.037 LI Jiao, HE Dengfa. Evolution of Cambrian paleogeography and structure sedimentary environment in Sichuan Basin and its adjacent areas[J]. Journal of Paleogeography, 2014, 16(4):441-460. doi:10.7605/gdlxb.2014.04.037
[6] 杜金虎,汪泽成,邹才能,等.上扬子克拉通内裂陷的发现及对安岳特大型气田形成的控制作用[J].石油学报,2016,37(1):1-16. doi:10.7623/syxb201601001 DU Jinhu, WANG Zecheng, ZOU Caineng, et al. The reservoir-forming characteristics and major controlling factors of cambrian large gas field in central Sichuan Basin[J]. Acta Petrolei Sinica, 2016, 37(1):1-16. doi:10.7623/syxb201601001
[7] 姚根顺,周进高,邹伟宏,等.四川盆地下寒武统龙王庙组颗粒滩特征及分布规律[J].海相油气地质,2013,18(4):1-8. doi:10.3969/j.issn.1672-9854.2013.04.001 YAO Genshun, ZHOU Jin'gao, ZOU Weihong, et al. Characteristics and distribution rule of Lower Cambrian Longwangmiao grain beach in Sichuan Basin[J]. Marine Origin Petroleum Geology, 2013, 18(4):1-8. doi:10.3969/j.issn.1672-9854.2013.04.001
[8] 徐世琦,张光荣,李国辉,等.加里东古隆起震旦系的烃源条件[J].成都理工学院学报,2000,27(S1):131-138. XU Shiqi, ZHANG Guangrong, LI Guohui, et al. The hydrocarbon source condition of Sinian system of the Caledonian palaeo-uplift[J]. Journal of Chengdu University of Technology, 2000, 27(S1):131-138.
[9] 魏国齐,王志宏,李剑,等.四川盆地震旦系、寒武系烃源岩特征、资源潜力与勘探方向[J].天然气地球科学,2017,28(1):1-13. doi:10.11764/j.issn.1672-1926.2016.11.015 WEI Guoqi, WANG Zhihong, LI Jian, et al. Source rock characteristics, resource potential and exploration direction of Sinian and Cambrian in Sichuan Basin[J]. Natural Gas Geosciences, 2017, 28(1):1-13. doi:10.11764/j.issn.1672-1926.2016.11.015
[10] 徐春春,沈平,杨跃明,等.乐山-龙女寺古隆起震旦系-下寒武统龙王庙组天然气成藏条件与富集规律[J].天然气工业,2014,34(3):1-7. doi:10.3787/j.issn.1000-0976.2014.03.001 XU Chunchun, SHEN Ping, YANG Yueming, et al. Accumulation conditions and enrichment patterns of natural gas in the Lower Cambrian Longwangmiao Formation reservoirs of the Leshan-Longnusi paleohigh, Sichuan Basin[J]. Natural Gas Industry, 2014, 34(3):1-7. doi:10.3787/j.issn.1000-0976.2014.03.001
[11] 冉隆辉,谢姚祥,戴弹申.四川盆地东南部寒武系含气前景新认识[J].天然气工业,2008,28(5):5-9. doi:10.3787/j.issn.1000-0976.2008.05.002 RAN Longhui, XIE Yaoxiang, DAI Tanshen. New knowledge of gas-bearing potential in Cambrian system of Southeast Sichuan Basin[J]. Natural Gas Industry, 2008, 28(5):5-9. doi:10.3787/j.issn.1000-0976.2008.05.002
[12] 冯增昭,彭勇民,金振奎,等.中国早寒武世岩相古地理[J].古地理学报,2002,4(1):1-12. doi:10.3969/j.issn.1671-1505.2002.01.001 FENG Zengzhao, PENG Yongmin, JIN Zhenkui, et al. Lithofacies paleogeography of the Early Cambrian in China[J]. Journal of Paleogeography, 2002, 4(1):1-12. doi:10.3969/j.issn.1671-1505.2002.01.001
[13] 刘爱群,陈殿远,任科英.分频与波形聚类分析技术在莺歌海盆地中深层气田区的应用[J].地球物理学进展,2013,28(1):0338-0344. doi:10.6038/pg20130137 LIU Aiqun, CHEN Dianyuan, REN Keying. Frequency decomposition and waveform cluster analysis techniques Yinggehai Basin gas field in the deep area of application[J]. Progress in Geophys, 2013, 28(1):0338-0344. doi:10.6038/pg20130137
[14] 边树涛,董艳蕾,郑浚茂.地震波频谱衰减检测天然气技术应用研究[J].石油地球物理勘探,2007,42(3):296-300. doi:10.3321/j.issn:1000-7210.2007.03.011 BIAN Shutao, DONG Yanlei, ZHENG Junmao. Study on application of seismic frequency spectrum attenuation to detect natural gas[J]. Oil Geophysical Prospecting, 2007, 42(3):296-300. doi:10.3321/j.issn:1000-7210.2007.03.011
[15] 吕景英.用波形分析法预测塔河油田碳酸盐岩储层[J].勘探地球物理进展,2004,27(2):112-116. LÜ Jingying. Prediction of carbonate reservoirs using waveform analysis in Tahe Oilfield[J]. Progress in Exploration Geophysics, 2004, 27(2):112-116.
[16] 赵忠泉,贺振华,万晓明,等.基于敏感地震属性波形分类的流体预测研究[J].西南石油大学学报(自然科学版),2016,38(3):76-81. doi:10.11885/j.issn.1674-5086.2014.04.13.03 ZHAO Zhongquan, HE Zhenhua, WAN Xiaoming, et al. A study on fluid prediction based on the classification of sensitive seismic attributes[J]. Journal of Southwest Petroleum University (Science&Technology Edition), 2016, 38(3):76-81. doi:10.11885/j.issn.1674-5086.2014.04.13.03
[17] 唐大海,谢继容. Stratimagic地震相分析技术在川中油气勘探中的应用[J].石油物探,2002,24(3):185-189. doi:10.3969/j.issn.1006-0995.2004.03.014 TANG Dahai, XIE Jirong. The application of Stratimagic seismic facies analysis to oil and gas exploration in central Sichuan[J]. Acta Geologica Sichuan, 2002, 24(3):185-189. doi:10.3969/j.issn.1006-0995.2004.03.014
[18] LI Donghui, DONG Shouhua, ZHANG Cong. Application of micro-seismic facies to coal bed methane exploration[J]. Mining Science and Technology, 2011, 21(5):743-747. doi:10.1016/j.mstc.2011.04.001
[19] 代瑞雪,冉崎,关旭,等.非均质滩相储层地震反射特征及识别[J].西南石油大学学报(自然科学版),2019,41(3):61-70. doi:10.11885/j.issn.1674-5086.2018.01.11.02 DAI Ruixue, RAN Qi, GUAN Xu, et al. Characteristics and identification of seismic reflection in heterogeneous beach reservoirs[J]. Journal of Southwest Petroleum University (Science&Technology Edition), 2019, 41(3):61-70. doi:10.11885/j.issn.1674-5086.2018.01.11.02
[20] 陈恭洋,周艳丽,胡勇.碎屑岩储层岩石物理特征及岩性解释方法[J].西南石油大学学报(自然科学版),2011,33(2):21-27. doi:10.3863/j.issn.1674-5086.2011.02.003 CHEN Gongyang, ZHOU Yanli, HU Yong. The petrophysics characterization of clastic reservoir and the methods of lithology[J]. Journal of Southwest Petroleum University (Science&Technology Edition), 2011, 33(2):21-27. doi:10.3863/j.issn.1674-5086.2011.02.003
[21] 李国发,王艳仓,熊金良,等.地震波阻抗反演实验分析[J].石油地球物理勘探,2010,45(6):868-872. LI Guofa, WANG Yancang, XIONG Jinliang, et al. Experimental analysis on seismic impedance inversion[J]. Oil Geophysical Prospecting, 2010, 45(6):868-872.
[22] 李庆忠.论地震约束反演的策略[J].石油地球物理勘探,1998,33(4):423-438. LI Qingzhong. On strategy of seismic restricted inversion[J]. Oil Geophysical Prospecting, 1998, 33(4):423-438.
[23] 姚逢昌,甘利灯.地震反演的应用与限制[J].石油勘探与开发,2000,27(2):53-56. doi:10.3321/j.issn:1000-0747.2000.02.014 YAO Fengchang, GAN Lideng. Application and restriction of seismic inversion[J]. Petroleum Exploration and Development, 2000, 27(2):53-56. doi:10.3321/j.issn:1000-0747.2000.02.014
[24] 乐宏,赵路子,杨雨,等.四川盆地寒武系沧浪铺组油气勘探重大发现及其启示[J].天然气工业,2020,40(11):11-19. doi:10.3787/j.issn.1000-0976.2020.11.002 YUE Hong, ZHAO Luzi, YANG Yu, et al. Great discovery of oil and gas exploration in Cambrian Canglangpu Formation of the Sichuan Basin and its implications[J]. Natural Gas Industry, 2020, 40(11):11-19. doi:10.3787/j.issn.1000-0976.2020.11.002
[25] 杨光,李国辉,李楠,等.四川盆地多层系油气成藏特征与富集规律[J].天然气工业,2016,36(11):1-11. doi:10.3787/j.issn.1000-0976.2016.11.001 YANG Guang, LI Guohui, LI Nan, et al. Hydrocarbon accumulation characteristics and enrichment laws of multi-layered reservoirs in the Sichuan Basin[J]. Natural Gas Industry, 2016, 36(11):1-11. doi:10.3787/j.issn.1000-0976.2016.11.001
[26] 魏国齐,杨威,谢武仁,等.四川盆地震旦系-寒武系天然气成藏模式与勘探领域[J].石油学报,2018,39(12):1317-1327. doi:10.7623/syxb201812001 WEI Guoqi, YANG Wei, XIE Wuren, et al. Accumulation modes and exploration domains of Sinian-Cambrian natural gas in Sichuan Basin[J]. Acta Petrolei Sinica, 2018, 39(12):1317-1327. doi:10.7623/syxb201812001
[27] 刘树根,孙玮,罗志立,等.兴凯地裂运动与四川盆地下组合油气勘探[J].成都理工大学学报(自然科学版),2013,40(5):511-520. doi:10.3969/j.issn.1671-9727.2013.05.03 LIU Shugen, SUN Wei, LUO Zhili, et al. Xingkai taphrogenesis and petroleum exploration from Upper Sinian to Cambrian strata in Sichuan Basin, China[J]. Journal of Chengdu University of Technology (Science&Technology Edition), 2013, 40(5):511-520. doi:10.3969/j.issn.1671-9727.2013.05.03