陆相断陷湖盆页岩典型成岩作用对储集性能的控制--以济阳坳陷东营凹陷沙四上亚段为例

The contolling effect of typical diagenesis on reservoir performance of continental faulted lacustrine shale: a case of shale of the E_{s4 s} in Dongying Sag, Jiyang Depression

摘要

以济阳坳陷东营凹陷沙河街组四段上亚段（沙四上亚段）典型页岩为研究对象，采用岩心观察、薄片观察、 X线衍射全岩矿物分析、扫描电镜观察、有机地球化学测试、低温氮气吸附实验和核磁共振实验等方法，分析页岩沉积环境、岩相及其组合特征，研究页岩成岩作用，探讨典型成岩作用对页岩储集性能的影响。结果表明：东营凹陷沙四上亚段典型页岩类型为纹层状碳酸盐页岩和混合类页岩，东营凹陷缓斜坡洼陷带主要发育富碳酸盐页岩岩相组合，陡斜坡深陷带发育混合类页岩岩相组合，湖盆边缘带发育富长英类和富黏土类页岩岩相组合；成岩作用类型多样，有机质演化与碳酸盐等矿物近源溶蚀，黏土矿物转化与自生石英沉淀代表页岩不同矿物相互作用的典型特点，有机质生烃与碳酸盐矿物-自生石英-黏土矿物成岩协同演化特征明显；生烃排酸背景下的方解石溶蚀和重结晶作用对储集性能有良好的改善作用；自生石英沉淀、长石溶蚀是陡坡混合类页岩典型的成岩、成储作用类型，自生石英集合体保留大量晶间孔，扩孔作用显著，长英质矿物质量分数与页岩孔隙度、纳米级孔隙体积呈近似正相关关系。该结果为东营凹陷页岩有利储集区优选和井位部署提供指导。

Abstract

Taking the typical shale of the upper sub-member of the fourth member of the Shahejie Formation (Es₄s) in the Dongying Sag of the Jiyang Depression as the research object, methods such as core observation, thin section observation, X-ray whole-rock mineral analysis, scanning electron microscopy observation, organic geochemical testing, low-temperature nitrogen adsorption experiments, and nuclear magnetic resonance experiments were adopted to analyze the sedimentary environment, lithofacies and their combination characteristics of the shale, study the diagenesis of the shale, and explore the influence of typical diagenetic processes on the reservoir properties of the shale. The results show that the typical shale types in the upper sub-member of the fourth member of the Shahejie Formation in the Dongying Sag are carbonate-rich shale and mixed shale. The carbonate-rich shale lithofacies assemblage mainly develops in the inner depression of the gentle slope in the Dongying Sag, while the mixed shale lithofacies assemblage develops in the deep depression of the steep slope, and the feldspar-rich and clayrich shale lithofacies assemblage develops in the lake margin zone. The diagenetic types are diverse. The near-source dissolution of organic matter and carbonate minerals, the transformation of clay minerals and the precipitation of authigenic quartz represent the typical characteristics of the interaction between different minerals in the shale. The synergetic evolution of organic matter hydrocarbon generation and carbonate minerals-authigenic quartz-clay minerals is obvious. The dissolution and recrystallization of calcite under the background of hydrocarbon generation and acid expulsion have a good improvement effect on the reservoir properties. The precipitation of authigenic quartz and the dissolution of feldspar are typical diagenetic and reservoir-forming types of mixed shale in the steep slope. A large number of intergranular pores are retained in the authigenic quartz aggregates, and the pore expansion effect is significant. The mass percentage of feldspar and quartz minerals is approximately positively correlated with the porosity and nano-scale pore volume of the shale. This result has practical guiding significance for the selection of favorable shale reservoir areas and well location deployment in the Dongying Sag.

关键词

页岩油 / 混合页岩 / 成岩作用 / 储集性能 / 沙四上亚段 / 东营凹陷 / 济阳坳陷

Key words

shale oil / mixed shales / diagenesis / reservoir performance / Es  ₄s / Dongying Sag / Jiyang Depression

参考文献

[1] 刘惠民. 济阳坳陷页岩油勘探实践与前景展望[J]. 中国石油勘探, 2022, 27(1):73-87.

[2] LIU Huimin. Exploration practice and prospect of shale oil in Jiyang Depression[J]. China Petroleum Exploration, 2022, 27(1): 73-87.

[3] 宋明水. 济阳坳陷页岩油勘探实践与现状[J]. 油气地质与采收率, 2019, 26(1):1-12.

[4] SONG Mingshui. Practice and current status of shale oil exploration in Jiyang Depression[J]. Petroleum Geology and Recovery Efficiency, 2019, 26(1):1-12.

[5] 张顺, 刘惠民, 张鹏飞, 等. 东营凹陷中低成熟度富碳酸盐页岩地质特征:以牛庄洼陷沙四段上亚段为例[J]. 中国矿业大学学报, 2022, 51(6):1138-1151.

[6] ZHANG Shun, LIU Huimin, ZHANG Pengfei, et al. Geological characteristics of shale oil enrichment in Niuzhuang Sag,Dongying Depression[J]. Journal of China University of Mining & Technology, 2022, 51(6):1138-1151.

[7] 姜在兴, 张文昭, 梁超, 等. 页岩油储层基本特征及评价要素[J]. 石油学报, 2014, 35(1):184-196.

[8] JIANG Zaixing, ZHANG Wenzhao, LIANG Chao, et al. Characteristics and evaluation elements of shale oil reservoir[J]. Acta Petrolei Sinica, 2014, 35(1):184-196.

[9] 张建国, 姜在兴, 刘鹏, 等. 陆相超细粒页岩油储层沉积机制与地质评价[J]. 石油学报, 2022, 43(2):234-249.

[10] ZHANG Jianguo, JIANG Zaixing, LIU Peng, et al. Deposition mechanism and geological assessment of continental ultrafine-grained shale oil reservoirs[J]. Acta Petrolei Sinica, 2022, 43(2):234-249.

[11] 刘惠民, 张顺, 包友书, 等. 东营凹陷页岩油储集地质特征与有效性[J]. 石油与天然气地质, 2019, 40(3):512-523.

[12] LIU Huimin, ZHANG Shun, BAO Youshu, et al. Geological characteristics and effectiveness of the shale oil reservoir in Dongying Sag[J]. Oil & Gas Geology, 2019, 40(3):512-523.

[13] 栾国强, 董春梅, 马存飞, 等. 基于热模拟实验的富有机质泥页岩成岩作用及演化特征[J]. 沉积学报, 2016, 34(6):1208-1216.

[14] LUAN Guoqiang, DONG Chunmei, MA Cunfei, et al. Pyrolysis simulation experiment study on diagenesis and evolution of organicrich shale[J]. Acta Sedimentologica Sinica, 2016, 34(6):1208-1216.

[15] 余志云, 陈世悦, 张顺, 等. 成岩作用对泥页岩储集性能的影响:以东营凹陷古近系沙四上亚段为例[J]. 古地理学报, 2022, 24(4): 771-784.

[16] YU Zhiyun, CHEN Shiyue, ZHANG Shun, et al. Influence of diagenesis on reservoir performance of shale:a case study of the upper sub-member of member 4 of Paleogene Shahejie Formation in Dongying Sag[J]. Journal of Palaeogeography, 2022, 24(4):771-784.

[17] 赵建华, 金之钧. 泥岩成岩作用研究进展与展望[J]. 沉积学报, 2021, 39(1):58-72.

[18] ZHAO Jianhua, JIN Zhijun. Mudstone diagenesis:research advances and prospects[J]. Acta Sedimentologica Sinica, 2021, 39(1):58-72.

[19] 张顺. 东营凹陷页岩储层成岩作用及增孔和减孔机制[J]. 中国矿业大学学报, 2018, 47(3):562-578.

[20] ZHANG Shun. Diagenesis and mechanism of shale reservoir pore increase and reduction in Dongying Sag[J]. Journal of China University of Mining & Technology, 2018, 47(3):562-578.

[21] 张顺, 刘惠民, 宋国奇, 等. 东营凹陷页岩油储集空间成因及控制因素[J]. 石油学报, 2016, 37(12):1495-1507.

[22] ZHANG Shun, LIU Huimin, SONG Guoqi, et al. Genesis and control factors of shale oil reserving space in Dongying Sag[J]. Acta Petrolei Sinica, 2016, 37(12):1495-1507.

[23] 刘金, 王剑, 马啸, 等. 陆相咸化湖盆页岩油甜点孔隙特征与成因:以准噶尔盆地芦草沟组为例[J]. 地质学报, 2023, 97(3):864-878.

[24] LIU Jin, WANG Jian, MA Xiao, et al. Pore characteristics and genesis of shale oil sweet spots in saline lacustrine basins:a case study from the Lucaogou Formation in the Junggar Basin[J]. Acta Geologica Sinica, 2023, 97(3):864-878.

[25] 王居峰. 济阳坳陷东营凹陷古近系沙河街组沉积相[J]. 古地理学报, 2005, 7(1):45-58.

[26] WANG Jufeng. Sedimentary facies of the Shahejie Formation of Paleogene in Dongying Sag Jiyang Depression[J]. Journal of Palaeogeography, 2005, 7(1):45-58.

[27] 于兴河, 姜辉, 李胜利, 等. 中国东部中、新生代陆相断陷盆地沉积充填模式及其控制因素:以济阳坳陷东营凹陷为例[J]. 岩性油气藏, 2007, 19(1):39-45.

[28] YU Xinghe, JIANG Hui, LI Shengli, et al. Depositional filling models and controlling factors on Mesozoic and Cenozoic fault basins of terrestrial facies in Eastern China:a case study of Dongying Sag of Jiyang Depression[J]. Lithologic Reservoirs, 2007, 19(1):39-45.

[29] 刘建平, 鲜本忠, 张莉, 等. 渤海湾盆地东营凹陷碎屑流主控型深水体系沉积过程及模式[J]. 中国地质, 2022, 49(6):1951-1969.

[30] LIU Jianping, XIAN Benzhong, ZHANG Li, et al. Depositional process and model of debrite dominated deep-water system in the Dongying Depression,Bohai Bay Basin[J]. Geology in China, 2022, 49(6):1951-1969.

[31] 王勇, 刘惠民, 宋国奇, 等. 济阳坳陷泥页岩细粒沉积体系研究[J]. 石油学报, 2019, 40(4):395-410.

[32] WANG Yong, LIU Huimin, SONG Guoqi, et al. Study on the mud shale fine-grained sedimentary system in the Jiyang Depression[J]. Acta Petrolei Sinica, 2019, 40(4):395-410.

[33] 姜在兴, 梁超, 吴靖, 等. 含油气细粒沉积岩研究的几个问题[J]. 石油学报, 2013, 34(6):1031-1039.

[34] JIANG Zaixing, LIANG Chao, WU Jing, et al. Several issues in sedimentological studies on hydrocarbon-bearing fine-grained sedimentary rocks[J]. Acta Petrolei Sinica, 2013, 34(6):1031-1039.

[35] 张顺, 陈世悦, 鄢继华, 等. 东营凹陷西部沙三下亚段一沙四上亚段泥页岩岩相及储层特征[J]. 天然气地球科学, 2015, 26(2):320-332.

[36] ZHANG Shun, CHEN Shiyue, YAN Jihua, et al. Characteristies of shale lithofacies and reservoir space in the 3 rd and 4 th members of Shahejie Formation,the west of Dongying Sag[J]. Natural Gas Geoscience, 2015, 26(2):320-332.

[37] 王勇, 宋国奇, 刘惠民, 等. 济阳坳陷细粒沉积岩形成环境及沉积构造[J]. 东北石油大学学报, 2015, 39(3):7-14.

[38] WANG Yong, SONG Guoqi, LIU Huimin, et al. Formation environment and sedimentary structures of fine-grained sedimentary rock in Jiyang Depression[J]. Journal of Northeast Petroleum University, 2015, 39(3):7-14.

[39] 王学军, 宁方兴, 郝雪峰, 等. 古近系页岩油赋存特征:以济阳坳陷为例[J]. 科学技术与工程, 2017, 17(29):39-48.

[40] WANG Xuejun, NING Fangxing, HAO Xuefeng, et al. Paleogene shale oil occurrence features:a case of Jiyang Depression[J]. Science Technology and Engineering, 2017, 17(29):39-48.

[41] 刘雅利, 张顺, 刘惠民, 等. 断陷盆地陡坡带富有机质页岩基本特征及勘探前景:以济阳坳陷为例[J]. 中国矿业大学学报, 2021, 50 (6):1108-1118.

[42] LIU Yali, ZHANG Shun, LIU Huimin, et al. Basic characteristics and exploration prospect of shale in steep slope belt of continental faultedbasin:a case study of Jiyang Depression[J]. Journal of China University of Mining & Technology, 2021, 50(6):1108-1118.

[43] 宁方兴, 王学军, 郝雪峰, 等. 济阳坳陷不同岩相页岩油赋存机理[J]. 石油学报, 2017, 38(2):185-195.

[44] NING Fangxing, WANG Xuejun, HAO Xuefeng, et al. Occurrence mechanism of shale oil with different lithofacies in Jiyang Depression[J]. Acta Petrolei Sinica, 2017, 38(2):185-195.

[45] 徐效平. 渤海湾盆地东营凹陷古近系富碳酸盐矿物页岩储集特征及其控制因素[J]. 石油实验地质, 2023, 45(3):413-421.

[46] XU Xiaoping. Reservoir characteristics and controlling factors of Paleogene carbonate-rich shale in Dongying Sag,Bohai Bay Basin[J]. Petroleum Geology & Experiment, 2023, 45(3):413-421.

[47] 滕建彬, 邱隆伟, 张守鹏, 等. 济阳坳陷古近系沙河街组湖相富有机质页岩白云石成因及成岩演化[J]. 石油勘探与开发, 2022, 49(6): 1080-1093.

[48] TENG Jianbin, QIU Longwei, ZHANG Shoupeng, et al. Origin and diagenetic evolution of dolomites in Paleogene Shahejie Formation lacustrine organic shale of Jiyang Depression,Bohai Bay Basin,East China[J]. Petroleum Exploration and Development, 2022, 49(6):1080-1093.

[49] 王永诗, 李政, 王民, 等. 渤海湾盆地济阳坳陷陆相页岩油吸附控制因素[J]. 石油与天然气地质, 2022, 43(3):489-498.

[50] WANG Yongshi, LI Zheng, WANG Min, et al. Factors controlling lacustrine shale oil adsorption in the Jiyang Depression,Bohai Bay Basin[J]. Oil & Gas Geology, 2022, 43(3):489-498.

[51] 张顺, 刘惠民, 王永诗, 等. 东营凹陷古近系页岩成岩事件及其对页岩储集空间发育特征的影响[J]. 油气地质与采收率, 2019, 26(1): 109-118.

[52] ZHANG Shun, LIU Huimin, WANG Yongshi, et al. Diagenetic event of Paleogene shale and its influence on development characteristics of shale pore space in Dongying Sag[J]. Petroleum Geology and Recovery Efficiency, 2019, 26(1):109-118.

[53] HOUSEKNECHT D W, SCHENK C J, SSHMOKER J W, et al. Organic acid-driven carbonate dissolution in Lower Paleozoic shales of the United States[J]. AAPG Bulletin, 2016, 100(5):717-738.

[54] CURTIS M E, CARDOTT B J, SONDERGELD C H, et al. Development of organic porosity in the Woodford shale with increasing thermal maturity[J]. International Journal of Coal Geology, 2012,103:26-31.

[55] 操应长, 远光辉, 王艳忠, 等. 典型含油气盆地深层富长石碎屑岩储层长石溶蚀接力成孔认识及其油气地质意义[J]. 中国科学:地球科学, 2022, 52(9):1694-1725.

[56] CAO Yingchang, YUAN Guanghui, WANG Yanzhong, et al. Successive formation of secondary pores via feldspar dissolution in deeply buried feldspar-rich clastic reservoirs in typical petroliferous basins and its petroleum geological significance[J]. Science China Earth Sciences, 2022, 52(9):1694-1725.

[57] 宋来弟, 李美蓉, 于海鹏, 等. 不同 pH 条件下长石和方解石矿物选择性溶蚀过程[J]. 东北石油大学学报, 2022, 46(3):74-83.

[58] SONG Laidi, LI Meirong, YU Haipeng, et al. Selective dissolution process of feldspar and calcite minerals under different pH conditions[J]. Journal of Northeast Petroleum University, 2022, 46(3):74-83.

[59] 李桥. 东营凹陷北带古近纪＂源-汇＂系统及砂体分布[D]. 青岛: 中国石油大学(华东),2018:15-60.

[60] LI Qiao. The Paleogene source-to-sink system and sand-bodies distribution in the northern steep slope zone,Dongying Sag[D]. Qingdao: China University of Petroleum(East China),2018:15-60.

[61] 肖冬生, 付强. 鄂尔多斯盆地北部杭锦旗区块下石盒子组自生石英形成机制[J]. 岩石矿物学杂志, 2011, 30(1):8.

[62] XIAO Dongsheng, FU Qiang. The genetic mechanism of authigenic quartz in Lower Shihezi Formation of Haggin Banner Northern Ordos Basin[J]. Acta Petrologica et Mineralogica, 2011, 30(1):8.

[63] 刘国恒, 黄志龙, 郭小波, 等. 新疆三塘湖盆地马朗凹陷中二叠统芦草沟组泥页岩层系 SiO₂ 赋存状态与成因[J]. 地质学报, 2016, 90 (6):1220-1235.

[64] LIU Guoheng, HUANG Zhilong, GUO Xiaobo, et al. The SiO₂ occurrence and origin in the shale system of Middle Permian series Lucaogou Formation in Malang Sag,Santanghu Basin,Xinjiang[J]. Acta Geologica Sinica, 2016, 90(6):1220-1235.

[65] 陈彦华, 刘莺. 成岩相一储集体预测的新途径[J]. 石油实验地质, 1994, 16(3):274-281.

[66] CHEN Yanhua, LIU Ying. Diagenetic facies:a new approach to the prediction of reservoir rocks[J]. Experimental Petroleum Geology, 1994, 16(3):274-281.

[67] 邹才能, 陶士振, 薛叔浩. ＂相控论＂的内涵及其勘探意义[J]. 石油勘探与开发, 2005, 32(6):7-12.

[68] ZOU Caineng, TAO Shizhen, XUE Shuhao. Connotation of＂Facies Control Theory＂and its significance for exploration[J]. Petroleum Exploration and Development, 2005, 32(6):7-12.

[69] 赖锦, 王贵文, 王书南, 等. 碎屑岩储层成岩相研究现状及进展[J]. 地球科学进展, 2013, 28(1):39-50.

[70] LAI Jin, WANG Guiwen, WANG Shunan, et al. Research status and advances in the diagenetic facies of clastic reservoirs[J]. Advances in Earth Science, 2013, 28(1):39-50.

[71] 卢龙飞, 刘伟新, 魏志红, 等. 四川盆地志留系页岩成岩特征及其对孔隙发育与保存的控制[J]. 沉积学报, 2022, 40(1):73-87.

[72] LU Longfei, LIU Weixin, WEI Zhihong, et al. Diagenesis of the Silurian shale,Sichuan Basin:focus on pore development and preservation[J]. Acta Sedimentologica Sinica, 2022, 40(1):73-87.

[73] 邵红梅, 高波, 潘会芳, 等. 松辽盆地古龙页岩成岩一孔隙演化[J]. 大庆石油地质与开发, 2021, 40(5):56-67.

[74] SHAO Hongmei, GAO Bo, PAN Huifang, et al. Diagenesis-pore evolution for Gulong shale in Songliao Basin[J]. Petroleum Geology & Oilfield Development in Daqing, 2021, 40(5):56-67.

[75] 王剑, 周路, 刘金, 等. 准噶尔盆地吉木萨尔凹陷二叠系芦草沟组酸碱交替成岩作用特征及对页岩储集层的影响[J]. 石油勘探与开发, 2020, 47(5):898-912.

[76] WANG Jian, ZHOU Lu, LIU Jin, et al. Acid-base alternation diagenesis and its influence on shale reservoirs in the Permian Lucaogou Formation,Jimusar Sag,Junggar Basin,NW China[J]. Petroleum Exploration and Development, 2020, 47(5):898-912.

[77] 窦伟, 孙丕臣, 欧阳哲远, 等. 纹层发育程度对页岩储层的影响:以渤海湾盆地东营凹陷沙四上一沙三下亚段页岩为例[J]. 东北石油大学学报, 2023, 47(4):14-28.

[78] DOU Wei, SUN Pichen, OUYANG Zheyuan, et al. Influence of lamination development on shale reservoirs:a case study of shales from the upper Es₄ and lower submember Es₃ in the Dongying Sag of the Bohai Bay Basin[J]. Journal of Northeast Petroleum University, 2023, 47(4):14-28.

[79] WANG Y, LIU L, ZHANG Y. Controls on silica cementation and porosity evolution in shale reservoirs[J]. Sedimentary Geology, 2021,416:105847.

[80] PLUMMER L N, BUSENBERG E. The solubilities of amorphous silica and quartz in water at elevated temperatures[J]. Geochimica et Cosmochimica Acta, 1982, 46(9):1963-1974.

基金资助

国家科技重大专项(2024ZD1400100)

国家自然科学基金企业联合基金项目(U24B6002)