赵迪斐, 郭英海, 曾春林,等. 海相沉积环境与沉积层序对页岩储层含气性的影响——以黔浅1井五峰组-龙马溪组为例[J].河南理工大学学报（自然科学版）,2021,40(1):30-42.

ZHAO D F, GUO Y H, ZENG C L, et al. Influences of marine sedimentary environment and sedimentary sequence ongas-bearing property of shale reservoir ：Taking Wufeng-Longmaxi formation of Qianqian well-1 as an example[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(1):30-42.

海相沉积环境与沉积层序对页岩储层含气性的影响——以黔浅1井五峰组-龙马溪组为例

赵迪斐1,2,3,4, 郭英海2, 曾春林3,4, 焦伟伟3,4, 任呈瑶5, 王玉杰2, 于金巧2

1.中国矿业大学 人工智能研究院，江苏 徐州221000;2.中国矿业大学 资源与地球科学学院，江苏 徐州 221116;3.自然资源部页岩气资源 勘查重点实验室，重庆地质矿产研究院，重庆 401120;4.页岩气勘探开发国家地方联合工程研究中心，重庆地质矿产研究院，重庆  401120;5.昆士兰大学可持续矿产中心，澳大利亚布里斯班 4072

摘要:为探明海相沉积环境与沉积层序对页岩储层含气性的影响，通过岩石手标本研究、化石研究、岩芯薄片观察、测井小波分析、地化测试、储层特征测试等手段，以黔浅1井五峰组-龙马溪组页岩储层为例，探究沉积环境与页岩储层含气性的关系与影响。研究表明：黔浅1井五峰组-龙马溪组发育3个三级层序，通过测井小波分析，结合岩石学特征、地化特征、化石特征，建立了高分辨率层序地层格架，识别出3个三级层序、5个中期旋回A—E及11个笔石带；旋回A对应五峰组页岩储层，有机质及矿物富集受沉积环境滞留闭塞程度影响，有机质丰度高、脆性矿物含量高，对应笔石带WF1-5；旋回B对应龙马溪组底部页岩储层，沉积构造发育、有机质及矿物富集受益于水体快速加深的沉积条件，与旋回A共同构成黔浅1井五峰组-龙马溪组页岩层系的优质页岩储层段，对应笔石带LM1-3；旋回C对应龙马溪组下部储层，水体深度相对变浅，扰动增强，使有机质及纳米孔隙系统发育变差，储层质量显著下降；旋回D—E对应龙马溪组中一上部，水体进一步变浅，沉积构造与矿物组分发生显著变化。在沉积环境的控制下，储层物质组分、微观结构与物性特征存在显著的非均质性，使不同层段具有不同的生气能力、储气能力、“憋”气（自封） 能力，进而影响了页岩储层的含气性。

关键词:页岩气储层;含气性;非均质性;海相沉积环境;龙马溪组-五峰组;沉积层序;笔石带

doi:10.16186/j.cnki.1673-9787.2019080035

基金项目:国家自然科学基金资助项目（41772130；41804160）；刘宝珺地学青年科学资助项目（DMSMX2019002）；江苏省自然科学基金 青年基金项目（BK20170274）；中国矿业大学国家级大学生科研训练项目（201910290021z）；中国矿业大学资源学院大学生学 术科研中心创新训练项目（CSA-2018-007）

收稿日期:2019/08/10

修回日期:2019/10/16

出版日期:2021/01/15

Influences of marine sedimentary environment and sedimentary sequence ongas-bearing property of shale reservoir ：Taking Wufeng-Longmaxi formation of Qianqian well-1 as an example

ZHAO Difei1,2,3,4, GUO Yinghai2, ZENG Chunlin3,4, JIAO Weiwei3,4, REN Chengyao5, WANG Yujie2, YU Jinqiao2

1.Artificial Intelligence Research Institute,China University of Mining and Technology,Xuzhou  221000 Jiangsu,China;2.School of Resources and Geosciences,China University of Mining and Technology,Xuzhou  221116 ,Jiangsu,China;3.Key Laboratory of Shale Gas Exploration,Ministry of Natural Resources,Chongqing Institute of Geology and Mineral Resources,Chongqing  401120 ,China;4.National and Local Joint Engineering Research Center of Shale Gas Exploration and Development,Chongqing Institute of Geology and Mineral Resources,Chongqing  401120 ,China;5.Sustainable Minerals Institute,U niversity of Queensland,Brisbane  4072 .Australia

Abstract:To explore the influence of marine sedimentary environment and sedimenrary sequence on gas-bearing property of shale reservoir,Wufeng-Longmaxi formation shale reservoir of the Qianqian well-1 were taken as an example to explore the relationship and influence between sedimentary environment and shale reservoir gasbearing property by methods of rock hand specimen study,fossil study,core thin section observation,logging wavelet analysis,geochemical tests and reservoir characteristic tests.The study showd that three third-order sequences in the Wufeng-Longmaxi formation were developed in the Qianqian well-1 ,a high resolution sequence stratigraphic framework was established.By logging wavelet analysis,combining with petrological,geochemical and fossil characteristics,three third-order sequences,five medium-term cycles A-E and 11 graptolite belts were identified.Cycle A corresponded to the shale reservoir of Wufeng formation.The enrichment of organic matter and minerals was affected by the degree of detention and blockage of sedimentary environment.The abundance of organic matter and brittle minerals was high,which corresponded to WF1-5 of graptolite zone.Cycle B corresponded to the shale reservoir of the bottom Longmaxi formation.The development of sedimentary structure,the enrichment of organic matter and minerals benefited from the rapid deepening of sedimentary conditions.Together with Cycle A,it constituted the high-quality shale reservoir section of Wufeng-Longmaxi formation shale strata in the Qianqian well-1 ,corresponding to the graptolite zone of LM1-3.Cycle C corresponded reservoir of to the lower Longmaxi formation.The depth of water body became shallower,and the disturbance increased.The development of organic matter and nano-pore system was deteriorated,thus,the reservoir quality decreased significantly.Cycle D-E corresponded to the middle-upper part of the Longmaxi formation,the water body became shallower further,the sedimentary structure and mineral composition changed significantly.Under the control of sedimentary environment,the material composition,microstructure and physical properties of the reservoir have significant heterogeneity,which made different intervals had different gas generation capacity,gas storage capacity and “ holding“ gas （ self sealing） capacity,thus affected the gas bearing property of shale reservoir.

Key words:shale gas reservoir;gas-bearing;heterogeneity;marine sedimentary environment;Longmaxi-Wufeng formation;sedimentary sequence;graptolite zone

海相沉积环境与沉积层序对页岩储层_省略__以黔浅1井五峰组_龙马溪组为例_赵迪斐.pdf