东营凹陷博兴洼陷沙四上亚段滩坝优质储层形成机理与分布特征

doi:10.13278/j.cnki.jjuese.20160368

摘要/Abstract

摘要： 综合运用岩心观察、铸体薄片鉴定、扫描电镜分析、岩石物性测试以及试油结果等分析方法，对东营凹陷博兴洼陷沙四上亚段滩坝中深部储层基本特征进行了研究。结果表明：滩坝中深部储层主要为低孔低渗储层，储集空间表现为原生孔隙和次生孔隙并存发育；研究区优质储层的形成机理主要有沉积作用、地层超压、油气充注、酸性溶蚀和绿泥石颗粒包壳；坝主体和滩脊距泥岩层较远部位储层分选好，抗压实能力强，由于酸性溶解对储层的改造以及油气充注对胶结作用的抑制，中深层仍发育大量原生孔隙和次生孔隙，储层物性较好，并在异常超压和绿泥石颗粒包壳的保护下保存至今并成为有效优质储层；坝主体和滩脊距泥岩层较近部位储层，由于早期强烈的碳酸盐胶结作用并形成致密胶结壳，导致现今储层物性极差，主要发育无效储层；坝侧缘以及滩席储层原始沉积条件差，杂基含量高，在埋藏过程中以压实作用和泥质碳酸盐胶结作用为主，溶解作用微弱，现今物性差，从浅层到深层基本全为无效储层。博兴洼陷沙四上亚段滩坝优质储层主要分布在厚层坝主体和滩脊砂体的中部位置。

关键词: 优质储层, 形成机理, 滩坝, 东营凹陷, 博兴洼陷

Abstract: Based on the core observation, thin section identification, scanning electronic imaging, and petro-physical property and other technical methods, the basic reservoir characteristics of medium-deep strata of beach-bar sandstones were investigated in the upper part of Es₄ (Es₄^s) in the Boxing sag, Dongying depression. The results indicate that the reservoirs are mainly characterized by low porosity and low permeability, and the reservoir spaces are mainly of primary and secondary pores. The formation mechanism of high-quality reservoirs is mainly consist of sedimentation, stratigraphic overpressure, hydrocarbon injection, acid dissolution,and chlorite grain coating. The reservoirs of both bar body and beach edge sub-facies that are far from mudstones are well sorted with strong anti-compacting capacity. Abundant primary and secondary porosities are developed in the medium-deep strata because of the modifications caused by acid dissolution and hydrocarbon filling. These reservoirs are protected by both stratigraphic overpressure and chlorite grain coating, and therefore become effective high-quality reservoirs. The lithofacies of both bar bodies and beach edge sub-facies adjacent to mudstones are typically characterized by the extensive carbonate cementation, which results in the extremely physical properties and invalid reservoir quality. The lithofacies of both bar edge and beach mat sub-facies were deposited under the poor depositional conditions with high contents of matrix. The reservoirs were dominated by compaction and micritic carbonate cementation with weak acidic dissolution. The present physical properties are extremely poor and characterized by invalid reservoirs from shallow to deep strata. The high-quality reservoirs of beach-bar sandstones are located at the central section of thick bar bodies and beach edges.

Key words: high-quality reservoir, formation mechanism, beach-bar, Dongying depression, Boxing sag

中图分类号:

P618.13

贾艳聪, 操应长, 林畅松, 王健. 东营凹陷博兴洼陷沙四上亚段滩坝优质储层形成机理与分布特征[J]. 吉林大学学报(地球科学版), 2018, 48(3): 652-664.

Jia Yancong, Cao Yingchang, Lin Changsong, Wang Jian. Formation Mechanism and Distribution of High-Quality Reservoirs for Beach-Bar Sandstones in Upper Part of Es₄ in Boxing Sag, Dongying Depression[J]. Journal of Jilin University(Earth Science Edition), 2018, 48(3): 652-664.

参考文献

[1] 王元君,冯明石,王峻,等.渤中凹陷石南斜坡区古近系中深层优质储层特征[J].矿物岩石,2012,32(3):77-84. Wang Yuanjun, Feng Mingshi, Wang Jun, et al. Characteristics of High-Quality Reservoir of Medium-Deep Paleogene in Shinan Slope Area, Bozhong Depression[J]. Journal of Mineral Petrology, 2012, 32(3):77-84.
[2] 韩成,潘懋,关平,等.柴达木盆地西北部碱山构造中深层储层特征及成因[J].天然气地球科学,2012,23(5):820-825. Han Cheng, Pan Mao, Guan Ping, et al. Reservoir Features and Its Genesis in the Middle-Deep Strata of the Jianshan Structure in the Northwestern Qaidam Basin[J].Natural Gas Geoscience, 2012, 23(5):820-825.
[3] 郭迎春,庞雄奇,陈冬霞,等.川西坳陷中段须二段致密砂岩储层致密化与相对优质储层发育机制[J].吉林大学学报(地球科学版),2012,42(2):21-32. Guo Yingchun, Pang Xiongqi, Chen Dongxia, et al. Densification of Tight Gas Sandstones and Formation Mechanism of Relatively High-Quality Reservoir in the Second Member of the Xujiahe Formation, Western Sichuan Depression[J]. Journal of Jilin University(Earth Science Edition), 2012, 42(2):21-32.
[4] 罗文军,彭军,曾小英,等.川西丰谷地区须四段钙屑砂岩优质储层形成机理[J].石油实验地质,2012,34(4):412-416. Luo Wenjun, Peng Jun, Zeng Xiaoying, et al. Formation Mechanism of High-Quality Reservoir of Calcarenaceous Sandstone in Fourth Member of Xujiahe Formation, Fenggu Area, Wesern Sichuan Depression[J]. Petroleum Geology & Experiment, 2012, 34(4):412-416.
[5] 钟大康,朱筱敏,王红军.中国深层优质碎屑岩储层特征与形成机理分析[J].中国科学:地球科学,2008,38(增刊Ⅰ):11-18. Zhong Dakang, Zhu Xiaomin, Wang Hongjun. Reservoir Features and Formation Mechanism of High-Quality Clastic Reservoir in Deep Strata in China[J].Science China:Earth Sciences, 2008, 38(Sup.Ⅰ):11-18.
[6] 袁海锋,徐国盛,董臣强,等.准中地区侏罗-白垩系优质储层形成机理[J].天然气工业,2008,28(5):14-17. Yuan Haifeng, Xu Guosheng, Dong Chenqiang, et al. Formation Mechanism of High Quality Jurassic-Cretaceous Reservoirs in the Central Junggar Basin[J].Natural Gas Industry, 2008, 28(5):14-17.
[7] 杨晓萍,赵文智,邹才能,等. 低渗透储层成因机理及优质储层形成与分布[J].石油学报,2007,28(4):57-61. Yang Xiaoping, Zhao Wenzhi, Zou Caineng, et al. Origin of Low Permeability Reservoir and Distribution of Favorable Reservoir[J]. Acta Petrolei Sinica, 2007, 28(4):57-61.
[8] 马奔奔,操应长,王艳忠,等. 车镇凹陷北带古近系中深层优质储层形成机理[J].中国矿业大学学报,2014,43(3):448-457. Ma Benben, Cao Yingchang, Wang Yanzhong, et al. Formation Mechanism of High-Quality Reservoir in the Middle-Deep Strata in Palaeogene in the North Zone of Chezhen Depression[J]. Journal of China University of Mining & Technology, 2014,43(3):448-457.
[9] 苏奥,杜江民,陈红汉,等.控制异常孔隙带发育的成岩流体类型与活动历史:以琼东南盆地东部宝岛北缘储层为例[J].天然气地球科学,2016,27(10):1837-1847. Su Ao, Du Jiangmin, Chen Honghan, et al. Diagenetic Fluid Type and Activity History of Controlling the Development of Abnormal Pore Zone:Taking the North Margin of Baodao Sag, Qiongdongnan Basin as an Example[J]. Natrual Gas Geosciences, 2016, 27(10):1837-1847.
[10] Taylor T R, Giles M R, Hathon L A, et al. Sandstone Diagenesis and Reservoir Quality Prediction:Models, Myths, and Reality[J]. AAPG Bulletin, 2010, 94:1093-1132.
[11] Nguyen B T, Jones S J, Goulty N R, et al. The Role of Fluid Pressure and Diagenetic Cements for Porosity Preservation in Triassic Fluvial Reservoirs of the Central Graben, North Sea[J].AAPG Bulletin, 2013, 97(8):1273-1302.
[12] Ajdukiewicz J M, Lander R H. Sandstone Reservoir Quality Prediction:The State of the Art[J]. AAPG Bulletin, 2010, 94:1083-1091.
[13] Bloch S, Lander R H, Bonnell L M. Anomalously High Porosity and Permeability in Deeply Buried Sandstone Reservoirs:Origin and Predictability[J]. AAPG Bulletin, 2002, 86:301-328.
[14] 王永诗,刘惠民,高永进,等. 断陷湖盆滩坝砂体成因与成藏:以东营凹陷沙四上亚段为例[J].地学前缘,2012,19(1):100-107. Wang Yongshi, Liu Huimin, Gao Yongjin, et al. Sandbody Genesis and Hydrocarbon Accumulation Mechanism of Beach-Bar Reservoir in Faulted-Lacustrine-Basins:A Case Study from the Upper of the Fourth Member of Shahejie Formation, Dongyong Sag[J].Earth Science Frontiers, 2012,19(1):100-107.
[15] 李秀华,肖焕钦,王宁. 东营凹陷博兴洼陷沙四段上亚段储集层特征及油气富集规律[J]. 油气地质与采收率,2001,8(3):21-25. Li Xiuhua, Xiao Huaqin, Wang Ning. Reservoir Characteristics and Hydrocarbon Enrichment Rules in Upper Es⁴ of Boxing Subsag in Dongying Sag[J].Petroleum Geology and Recover Efficiency, 2001,8(3):21-25.
[16] 操应长,王健,刘惠民,等. 东营凹陷南坡沙四上亚段滩坝砂体的沉积特征及模式[J].中国石油大学学报(自然科学版),2009,33(6):5-10. Cao Yingchang, Wang Jian, Liu Huimin, et al. Sedimentary Characteristics and Models of Beach-Bar Sandbodies in the Upper Part of the Fourth Member of Paleogene in the Southern Slope of Dongying Depression[J].Journal of China University of Petroleum, 2009,33(6):5-10.
[17] Morad S, Al-Ramadan K, Ketzer J M, et al. The Impact of Diagenesis on the Heterogeneity of Sandstone Reservoirs:A Review of the Role of Depositional Facies and Sequence Stratigraphy[J]. AAPG Bulletin, 2010, 94:1267-1309.
[18] 王健. 东营凹陷南部缓坡带薄砂体沉积特征及储层成岩改造模式[D].青岛:中国石油大学(华东),2013. Wang Jian. Sedimentary Characteristics and Reservoir Diagenetic Reconstruction Model of Thin Sandbodies of Southern Gentle Slope Belt in Dongying Depression[D].Qingdao:China University of Petroleum (Eastern China), 2013.
[19] Xie X, Bethke C M, Li S, et al. Overpressure and Petroleum Generation and Accumulation in the Dongying Depression of the Bohaiwan Basin, China[J]. Geofluids, 2001, 1:257-271.
[20] Guo X W, He S, Liu K Y, et al. Oil Generation as the Dominant Overpressure Mechanism in the Cenozoic Dongying Depression, Bohai Bay Basin, China[J]. AAPG Bulletin, 2010, 94:1859-1881.
[21] Becker S P, Eichhubl P, Laubach S E, et al. A 48 m.y. History of Fracture Opening, Temperature, and Fluid Pressure:Cretaceous Travis Peak Formation, East Texas Basin[J]. Geological Society of America Bulletin, 2010, 122:1081-1093.
[22] 苏永进,蒋有录,房新娜,等. 博兴洼陷古近系沙四上和沙三段油气成藏的差异性研究[J].中国石油大学学报(自然科学版),2006,30(2):11-15. Su Yongjin, Jiang Youlu, Fang Xinna, et al. Otherness on Pool-Forming in the Upper Es₄ and Es₃ of Palaeogene in Boxing Subsag[J]. Journal of China University of Petroleum, 2006,30(2):11-15.
[23] 荣启宏. 博兴洼陷东南部沙四段储层的流体史研究[J].矿物岩石,2004,24(2):61-66. Rong Qihong. Study on Fluid History of Reservoirs from Shasi Member, Southeast Boxing Depression[J]. Journal of Mineral Petrology, 2004,24(2):61-66.
[24] Saigal G C, Bjørlykke K, Larter S. The Effect of Oil Emplacement on Diagenetic Processes:Examples from the Fulmar Reservoir Sandstones, Central North Sea[J]. AAPG Bulletin, 1992, 76:1024-1033.
[25] Aase N E, Walderhaug O. The Effect of Hydro-carbons on Quartz Cementation:Diagenesis in the Upper Jurassic Sandstones of the Miller Field, North Sea, Revisited[J]. Petroleum Geoscience, 2005, 11:215-223.
[26] 谭丽娟,蒋有录,苏成义,等.东营凹陷博兴地区烃源岩和油源特征[J].石油大学学报(自然科学版),2002,26(5):1-5. Tan Lijuan, Jiang Youlu, Su Chengyi, et al. Characteristics of Hydrocarbon Source Rock and Oil-Source Correlation in Boxing Area of Dongying Depression[J]. Journal of China University of Petroleum, 2002,26(5):1-5.
[27] Surdam R C, Crossly L J, Hagen E S, et al. Organic-Inorganic Interactions and Sandstone Diagenesis[J]. AAPG Bulletin, 1989, 73(1):1-23.
[28] Bjørlykke K. Clay Mineral Diagenesis in Sedimentary Basins:A Key to the Prediction of Rock Properties:Examples from the North Sea Basin[J]. Clay Minerals, 1998, 33:15-34.
[29] Thyne G. A Model for Diagenetic Mass Transfer Between Adjacent Sandstone and Shale[J]. Marine and Petroleum Geology, 2001, 18:743-755.
[30] Ehrenberg S N. Preservation of Anomalously High Porosity in Deeply Buried Sandstones by Grain-Coating Chlorite:Example from the Norwegian Continental Shelf[J]. AAPG Bulletin, 1993, 77(7):1260-1286.
[31] 李克永,李文厚,张东阳,等.鄂尔多斯盆地安塞油田长10优质储层特征[J]地质通报,2013,32(9):1453-1460. Li Keyong, Li Wenhou, Zhang Dongyang, et al. An Analysis of Favorable Reservoir Characteristics of Chang 10 Formation in the Ansai Oilfield, Ordos Basin[J]. Geological Bulletin of China, 2013,32(9):1453-1460.

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