赵迪斐, 郑文涛, 陈海兵,等.巢湖地区二叠系海相-过渡相页岩发育特征及影响因素[J].河南理工大学学报（自然科学版）,2021,40(2):36-48.

ZHAO D F, ZHENG W T, CHEN H B, et al.Development characteristics and influencing factors of Marine-Transitional shale ofPermian strata in Chaohu area[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(2):36-48.

巢湖地区二叠系海相-过渡相页岩发育特征及影响因素

赵迪斐1,2, 郑文涛1, 陈海兵3, 许有为3, 尹俊凯4, 刘静1, 胡鑫蒙5

1.中国矿业大学 人工智能研究院，江苏 徐州  221116;2.煤层气资源与成藏过程教育部重点实验室，江苏 徐州 221008;3.中国石油长庆油田分公司第十采油厂地质研究所，甘肃 庆阳745100;4.山东泰山资源勘查有限公司，山东 济南 250000;4.中国科学院地质与地球物理研究所，北京 100000

摘要:巢湖地区的孤峰组、龙潭组、大隆组构成一套由海平面进退控制的海相-过渡相页岩层系。通过薄片观察、X射线衍射、高压压汞、低温氮气吸附、氩离子抛光-场发射扫描电镜等研究手段，以姚家山剖面为例，对巢湖地区孤峰组、龙潭组、大隆组页岩储层发育特征展开研究。 结果表明：页岩储层有机质丰度较高，介于1.89% -11.84%间<i>，</i>成熟度处于成熟阶段；矿物组分由脆性矿物和黏土矿物构成，脆性矿物以石英、碳酸盐岩矿物等为主；储层孔隙类型复杂，形貌多样，以小孔-微孔最为发育，孔径分布属于单峰型；有机质与石英对储层孔隙的发育具有正贡献，高有机质丰度有利于储集空间及吸附点位的增加，黏土矿物与碳酸盐岩矿物含量的增多不利于孔隙系统的发育。孤峰组、龙潭组、大隆组页岩储层发育的主要影响因素存在差异，沉积速率与水体氧化还原条件等因素在相对海平面升降的控制下影响页岩储层发育，大隆组与孤峰组贫氧-厌氧环境下的深水滞留盆地沉积条件与较高的古生产力、龙潭组陆源有机质的补充以及相对较快的沉积速率有利于优质储层的发育，层系内有利的储层主要发育在孤峰组大陆边缘-海盆过渡环境内海侵沉积期、龙潭组潟湖-潮上泥坪沉积环境、大隆组贫氧-厌氧环境下的深水滞留盆地沉积环境内。

关键词:页岩储层;孔隙结构;影响因素;沉积环境;巢湖地区;二叠系

doi:10.16186/j.cnki.1673-9787.2019100001

基金项目:国家自然科学基金资助项目（41772130）；刘宝珺地学青年科学基金资助项目（DMSMX2019002 ）；煤层气资源与成藏过程 教育部重点实验室（中国矿业大学）开放基金资助项目（2015-007 ）；重庆市绩效激励引导专项（cstc2018jxj190002 ）；重庆 页岩气公司科研项目（CYS-FW-2019-0099）；中国矿业大学大学生学术科研中心创新训练项目（CSA-2018-007）

收稿日期:2019/10/05

修回日期:2019/11/15

出版日期:2021/03/15

Development characteristics and influencing factors of Marine-Transitional shale ofPermian strata in Chaohu area

ZHAO Difei1,2, ZHENG Wentao1, CHEN Haibing3, XU Youwei3, YIN Junkai4, LIU Jing1, HU Xinmeng5

1.Artificial Intelligence Research Institute， China University of Mining and Technology ，Xuzhou  221116 Jiangsu， China;2.Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process， the Ministry of Education， Xuzhou  221008 ， Jiangsu， China;3.Institute of Geology of 10 th Oil Production plant， Changqing Oilfield Company， PetroChina ， Qingyang  745100 ， Gansu， China;4.Shandong Taishan Resources Exploration Co.， Ltd. ， Jinan  250000 ， Shandong， China;5.Institute of Geology and Geophysics， Chinese Academy of Sciences ， Beijing  100000 ， China

Abstract:The Gufeng formation， Longtan formation and Dalong formation in Chaohu area constitute a series of Marine-Transitional shale system controlled by sea-level advance and retreat. By methods of thin slice observation ，X-ray diffraction ， high-pressure mercury injection ， low -temperature nitrogen adsorption ， argon ion polishing-field emission scanning electron microscope， the shale reservoirs development characteristics of the Gufeng， Longtan and Dalong formations in the Chaohu area were studied， with Yaojiashan section as an example. The results showed that the organic matter abundance of shale reservoirs was relatively high， ranging from 1.89% to 11.84% ， and the maturity was in mature stage； The mineral components were mainly composed of brittleness minerals and clay minerals， and the brittleness minerals were mainly quartz and carbonate minerals ； The types and morphological characteristics of reservoir pores were complex， and pore-micropore was the most developed one， and the pore size distribution mode belonged to single peak type ； organic matter and quartz had a positive contribution to the development of reservoir pores， high organic matter abundance was beneficial to the increase of reservoir space and adsorption sites， while the increase of clay mineral and carbonate mineral content was not conducive to the development of pore system. The major influencing factors of shale reservoirs of Gufeng formation， Longtan formation and Dalong formation were different. The factors such as sedimentation rate and water redox condition affected shale reservoir development under the control of relative sea level rising and falling. The sedimentary conditions and higher paleoproductivity of deep-water detention basin in oxygen poor anaerobic environment of Dalong formation and Gufeng formation， the supplement of terrigenous organic matter of Longtan formation and relative fast deposition rate were beneficial to the development of high-quality reservoirs. High quality reservoirs were mainly developed in the continental margin-basin transition environment during the transgressive sedimentary period of Gufeng formation， lagoon-supratidal mud-flat sedimentary environment of Longtan formation， and deep-water detention basin sedimentary environment under the oxygen poor and anaerobic environment of Dalong formation.

Key words:shale reservoir;pore structure;influencing factor;sedimentary environment;Chaohu area;Permian strata

 巢湖地区二叠系海相_过渡相页岩发育特征及影响因素_赵迪斐.pdf