陆相页岩油甜点地球物理表征研究进展

doi:10.11743/ogg20190306

Abstract

Abstract: There are still many challenges on geophysical characterization of continental shale oil sweet spot in Eastern China in terms of technique applicability.Petrophysical models for continental shale oil layers are established to analyze geophysical responses based on the study on the fundamentals of continental shale oil.It's believed that the controlling factors for shale oil accumulation are organic-rick laminated lithofacies and fractures,following the integrated investigation of geology,well logging and geophysics.Besides,based on the existing methods for seismic prediction including lithofacies,TOC,rock physical property,oil bearing properties,brittleness,pore pressure and in-situ stress,new geophysical prediction methods are built for laminated lithofacies,fracture and in-situ stress.Based on petrophysical models and anisotropy pre-stack inversion,new methods are developed to predict the density of bedding-parallel fractures in shale,which is in turn regarded as a constraint for sedimentary analysis,so as to effectively predict the distribution of the laminated lithofacies.Orthorhombic anisotropy AVAZ algorithm is given to improve the seismic characterization of fractures;while the prediction of in-situ stress is achieved based onYoung's modulus,bulk modulus,and modulus of rigidity,and the direction of in-situ stress can be computed from interval velocity variation.The study clarifies the main controlling factors for continental shale oil sweet spots,establishes an index system for sweet spots,reveals the characteristics of petrophysical and geophysical responses of sweet spots,and optimizes the geophysical characterization method for sweet spots.These methods are successfully used to identify the favorable target areas for continental shale oil exploration in Jiyang Depression.

Key words: lithofacies, fracture, in-situ stress, petrophysics, geophysical characterization, continental shale oil sweet spot, Jiyang Depression

CLC Number:

TE132.1

Liu Xiwu, Liu Yuwei, Liu Zhiyuan, Song Liang, Liu Jiong, Huo Zhizhou, Zhang Jinqiang, Qian Keran, Zhang Yingyan. Progresses in geophysical characterization of continental shale oil sweet spots[J]. Oil & Gas Geology, 2019, 40(3): 504-511.

References

[1] 宁方兴.济阳坳陷页岩油富集主控因素[J].石油学报,2015,36(8):905-914. Ning Fangxing.The main control factors of shale oil enrichment in Jiyang depression[J].Acta Petrolei Sinica,2015,36(8):905-914.
[2] 陈美玲,潘仁芳,潘进.黄河口地区中深层超压成因机制及分布规律研究[J].石油天然气学报,2014,36(7):8-11. Chen Meiling,Pan Renfang,Pan jin.On overpressure generation mechanisms and distribution rules at mid-depth formation in Huanghekou region[J].Journal of Oil and Gas Technology,2014,36(7):8-11.
[3] 陈美玲,潘仁芳,张超谟,等.济阳拗陷沙河街组页岩与美国Bakken组页岩储层"甜点"特征对比[J].成都理工大学学报(自然科学版),2016,43(4):438-446. Chen Meiling,Pan Renfang,Zhang Chaomo,et al.Comparison of "sweet spot" characteristics of shale oil reservoir rocks between Shahejie formation in China and Bakken formation in North America[J].Journal of Chengdu University of Technology(Science & Technology Edition),2016,43(4):438-446.
[4] Guo Zhiqi,Deng Xinhui,Liu Cai,et al.Rock physics and seismic characterization of fractures in anisotropic shale reservoirs[C]//CGS/SEG International Geophysical Conference,Qingdao:Socitey of Exporation Geophysicists,2017:17-20.
[5] 刘喜武,刘宇巍,霍志周,等.页岩油气层地震岩石物理计算方法研究[J].石油物探,2016,55(1):10-17. Liu Xiwu,Liu Yuwei,Huo Zhizhou,et al.Study on seismic rock physics computational method for shale reservoir[J].Geophysical Prospecting,2016,55(1):10-17.
[6] 霍志周,刘喜武,刘宇巍,等.基于计算岩石物理方法的页岩储层弹性参数提取[J].地球物理学报,2018,61(7):3019-3027. Huo Zhizhou,Liu Xiwu,Liu Yuwei,et al.Determining elastic parameters of shale reservoirs based on computational rock physics methods[J].Chinese Journal of Geophysics,2018,61(7):3019-3027.
[7] Liu Yuwei,Dong Ning,Mike F,et al.Estimating the fracture density of small-scale vertical fractures when large-scale vertical fractures are present[J].Journal of Geophysics and Engineering.2015,12,(3):311-320.
[8] Liu Yuwei,Dong Ning,Liu Xiwu,et al.Inversion of fracture properties based on frequency dependent seismic AVAZ attributes[C]//SEG Annual Meeting.New Orleans,Louisiana:Society of Exploration Geophysicists,2015:1-5.
[9] Liu Yuwei.Fracture prediction approach for oil-bearing reservoir based on AVAZ attributes in orthorhombic medium[J].Petroleum Science,2018,15(3):510-520.
[10] 潘仁芳,陈美玲,张超谟,等.济阳坳陷渤南洼陷古近系页岩油"甜点"地震预测及影响因素分析[J].地学前缘,2018,25(4):142-154. Pan Renfang,Chen Meiling,Zhang Chaomo,et al.Seismic prediction of Paleogene shale oil"sweet spot"and its influencing factor analysis in the Bonan sub-sag of Jiyang depression[J].Earth Science Frontiers,2018,25(4):142-154.
[11] Lu Neng,Liu Cai,Guo Zhiqi,et al.The study on anisotropic attenuation of PP-wave AVAz due to fluid-saturated fractures for layered media[C]//CGS/SEG International Geophysical Conference,Qingdao:Socitey of Exporation Geophysicists,2017:381-384.
[12] Pang Shuo,Liu Cai,Guo Zhiqi et al.Fracture characterization for shale reservoirs using P-wave azimuthal seismic inversion[C]//CGS/SEG International Geophysical Conference.Qingdao:Socitey of Exporation Geophysicists,2017:653-656.
[13] Liu Jiong,Eduardo K,Liu Xiwu.Using pseudo-spectral method on curved grids for SH-wave modeling of irregular free-surface[J].Journal of Applied Geophysics,2017,140(3):42-51.
[14] Liu Jiong,Liu Xiwu.A pseudospectral scheme for SH-wave modeling of irregular free surface[C]//SEG Technical Program Expanded Abstracts.Dallas,Texas:Socitey of Exporation Geophysicists,2016:4039-4043.
[15] Liu Jiong,Liu Xiwu,Liu Zhenfeng,et al.SH-wave modeling on curved grids for irregular surface by pseudo-spectral method[C]//SPG/SEG International Geophysical Conference.Beijing:Petroleum Geophysical Exploration Editorial Department,2016:242-245.
[16] 刘喜武,刘宇巍,刘炯,等.一种页岩水平层理缝密度地震预测方法:北京,CN108459346A[P].2018-08-28. Liu Xiwu,Liu Yuwei,Liu Jiong,et al.A new scheme for prediction of shale reservoir bedding seam density:Beijing,CN108459346A[P].2018-08-28.
[17] 刘喜武,刘宇巍,刘志远,等.页岩层系天然裂缝地震预测技术研究[J].石油物探,2018,57(4):611-617. Liu Xiwu,Liu Yuwei,Liu Zhiyuan,et al.Seismic prediction of natural fractures in series of shale reservoirs[J].Geophysical Prospecting for Petroleum,2018,57(4):611-617.
[18] Ran B,Mita S,Antoun S,et al.Reconstruction of the layer anisotropic elastic parameter and high-resolution fracture characterization from P-wave data:a case study using seismic inversion and Bayesian rock physics parameter estimation[J].Geophysical Prospecting,2009,57:253-262.
[19] Psencik I,Martins J L.Properties of weak contrast PP reflection/transmission coefficients for weakly anisotropic elastic media[J].Studia Geophysica et Geodaetica,2001,45:176-199.
[20] Tang Yufei,Liu Yuwei,Liu Xiwu,Yang Guodong.Prediction of application scope of vertical fracture strike based on scattered wave fracture orientation function[J].Global Geology,2015,18(1):49-53.
[21] 刘喜武,董宁,刘宇巍.裂缝性孔隙介质频变AVAZ反演方法研究进展[J].石油物探,2015,54(2):210-217. Liu Xiwu,Dong Ning,Liu Yuwei.Progress on frequency dependent AVAZ inversion for characterization of fractured porous media[J].Geophysical Prospecting for Petroleum,2015,54(2):210-217.
[22] 刘宇巍,董宁,吴晓明,等.频变AVAZ响应特征分析及裂缝性质反演方法研究[J].地球物理学进展,2016,31(2):732-740. Liu Yuwei,Dong Ning,Wu Xiaoming,et al.Analysis of frequency-dependent AVAZ response attributes and research of fracture properties inversion method[J].Progress in Geophysics(in Chinese),2016,31(2):732-740.
[23] 刘建伟,张云银,曾联波,等.非常规油藏地应力和应力甜点地球物理预测-渤南地区沙三下亚段页岩油藏勘探实例[J].石油地球物理勘探,2016,51(4):792-800. Liu Jianwei,Zhang Yunyin,Zeng Lianbo,et al.Geophysical prediction of stress and stress desserts in unconventional reservoir:an example in Bonan area[J].Oil Geophysical Prospecting,2016,51(4):792-800.
[24] 宋建国,刘盛悦.基于逆时偏移的井间地震角道集提取方法[J].地球物理学进展,2018,33(2):707-714. Song Jianguo,Liu Shengyue.ADCIGs method of cross-well seismic data based on RTM[J].Progress in Geophysics(in Chinese),2018,33(2):707-714.
[25] 宋建国,郭毓,冉然.基于比值均方根的杨氏模量反演方法[J].地球物理学报,2018,61(4):1508-1518. Song Jianguo,Guo Yu,Ran Ran.Pre-stack inversion method of Young's modulus based on the root mean square ratio[J].Chinese Journal of Geophysics(in Chinese),2018,61(4):1508-1518.
[26] Zhang Yuanyin,Jin Zhijun,Chen Yequan,et al.Pre-stack density inversion based on integrated norm regularization in shale reservoir[C]//SEG International Exposition and Annual Meeting.Texas:Socitey of Exporation Geophysicists,2017:1-5.
[27] 陆益祥,潘仁芳,唐廉宇,等.沾化凹陷罗家地区沙三下亚段页岩储层的岩石力学与脆性评价研究[J].中国石油勘探,2017,22(6):69-77. Lu Yixiang,Pan Renfang,Tang Lianyu,et al.Rock mechanics and brittleness of shale reservoirs in the lower Sha 3 member of Luojia area,Zhanghua sag[J].China Petroleum Exploration,2017,22(6):69-77.

Progresses in geophysical characterization of continental shale oil sweet spots

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

[1]	Cheng Shen, Lan Ren, Jinzhou Zhao, Mingpei Chen. Division of shale lithofacies associations and their impact on fracture network formation in the Silurian Longmaxi Formation, Sichuan Basin [J]. Oil & Gas Geology, 2021, 42(1): 98-106, 123.
[2]	Hongjian Zhu, Yiwen Ju, Yan Sun, Cheng Huang, Hongye Feng, Raza Ali, Kun Yu, Peng Qiao, Lei Xiao. Evolution characteristics and models of shale pores and fractures under tectonic deformation: A case study of the Lower Paleozoic marine shale in the Sichuan Basin and its periphery [J]. Oil & Gas Geology, 2021, 42(1): 186-200, 240.
[3]	Kewei Zu, Lingxiao Fan, Bo Wang, Dongsheng Cao, Cong Guan, Zhongchao Li, Xiushen Cheng. Development patterns of fractures in carbonate reservoirs in the 2^nd member of Jialingjiang Formation, Puguang area, Sichuan Basin [J]. Oil & Gas Geology, 2020, 41(6): 1188-1196.
[4]	Zhe Mao, Lianbo Zeng, Guoping Liu, Zhiyong Gao, He Tian, Qing Liao, Yunzhao Zhang. Characterization and effectiveness of natural fractures in deep tight sandstones at the south margin of the Junggar Basin, northwestern China [J]. Oil & Gas Geology, 2020, 41(6): 1212-1221.
[5]	Jian Li, Lianbo Zeng, Yu Lin, Guoping Liu, Dongsheng Cao, Zhaosheng Wang. Horizontal fractures of the Cenozoic in western Qaidam Basin and their tectonic implication [J]. Oil & Gas Geology, 2020, 41(6): 1222-1232.
[6]	Xiaohua Che, Teng Zhao, Wenxiao Qiao, Wenya Lyu, Jianming Fan. Fracture identification and evaluation based on multi-pole acoustic logging [J]. Oil & Gas Geology, 2020, 41(6): 1263-1272.
[7]	Shuangquan Chen, Qingliang Zhong, Zhongping Li, Min Zhang, Xin Zhao, Xiangyang Li. Petrophysical modeling of horizontal bedding-parallel fractures and its seismic response characteristics [J]. Oil & Gas Geology, 2020, 41(6): 1273-1281, 1287.
[8]	Zhiming Chen, Haoshu Chen, Xinwei Liao, Lianbo Zeng, Biao Zhou. Evaluation of fracture networks along fractured horizontal wells in tight oil reservoirs:A case study of Jimusar oilfield in the Junggar Basin [J]. Oil & Gas Geology, 2020, 41(6): 1288-1298.
[9]	Meng Li, Xiaofei Shang, Huawei Zhao, Shuang Wu, Taizhong Duan. Prediction of fractures in tight gas reservoirs based on likelihood attribute —A case study of the 2^nd member of Xujiahe Formation in Xinchang area, Western Sichuan Depression, Sichuan Basin [J]. Oil & Gas Geology, 2020, 41(6): 1299-1309.
[10]	Xunyu Cai, Guiqiang Qiu, Dongsheng Sun, Hongquan Zhu, Wei Wang, Zhiping Zeng. Types and characteristics of tight sandstone sweet spots in large basins of central-western China [J]. Oil & Gas Geology, 2020, 41(4): 684-695.
[11]	Faqi He, Chengchun Liang, Cheng Lu, Chunyan Yuan, Xiaowei Li. Identification and description of fault-fracture bodies in tight and low permeability reservoirs in transitional zone at the south margin of Ordos Basin [J]. Oil & Gas Geology, 2020, 41(4): 710-718.
[12]	Jincai Zhang, Yuanchang Qi. Impact of in-situ stresses on shale reservoir development and its countermeasures [J]. Oil & Gas Geology, 2020, 41(4): 776-783, 799.
[13]	Yuan Deng, Shiyue Chen, Xiugang Pu, Jihua Yan, Jia Chen. Formation mechanism and environmental evolution of fine-grained sedimentary rocks from the second member of Kongdian Formation in the Cangdong Sag, Bohai Bay Basin [J]. Oil & Gas Geology, 2020, 41(4): 811-823, 890.
[14]	Zeng Lianbo, Lyu Peng, Qu Xuefeng, Fan Jianming. Multi-scale fractures in tight sandstone reservoirs with low permeability and geological conditions of their development [J]. Oil & Gas Geology, 2020, 41(3): 449-454.
[15]	Sun Shuai, Hou Guiting. Analysis of conceptual models for the influence of rock mechanics on tensile zone in faulted anticlines [J]. Oil & Gas Geology, 2020, 41(3): 455-462.