石油学报 ›› 2020, Vol. 41 ›› Issue (10): 1197-1208.DOI: 10.7623/syxb202010004

• 地质勘探 • 上一篇    下一篇

滦平盆地白垩系陆相页岩油储层特征

袁晓冬1, 姜在兴1, 张元福1, 姜洪福2   

  1. 1. 中国地质大学(北京)能源学院 北京 100083;
    2. 大庆油田有限责任公司 黑龙江大庆 163453
  • 收稿日期:2019-07-06 修回日期:2020-08-27 出版日期:2020-10-25 发布日期:2020-11-05
  • 通讯作者: 姜在兴,男,1962年3月生,1984年获华东石油学院石油地质学专业学士学位,1997年获中国科学院研究生院沉积学专业博士学位,现为中国地质大学(北京)能源学院教授,主要从事沉积学、层序地层学的教学和科研工作。Email:jiangzx@cugb.edu.cn;张元福,男,1979年9月生,2002年获石油大学(华东)应用地球物理学专业学士学位,2008年获中国地质大学(北京)能源地质工程专业博士学位,现为中国地质大学(北京)能源学院副教授、博士生导师,主要从事沉积学和层序地层学研究。Email:zhangyuanfu@163.com
  • 作者简介:袁晓冬,男,1994年10月生,2017年获东北大学资源勘查工程专业学士学位,现为中国地质大学(北京)地质工程专业硕士研究生,主要从事沉积学研究。Email:18712738302@163.com
  • 基金资助:

    国家科技重大专项(2017ZX05009-002)和国家自然科学基金面上项目(No.41772090)资助。

Characteristics of the Cretaceous continental shale oil reservoirs in Luanping Basin

Yuan Xiaodong1, Jiang Zaixing1, Zhang Yuanfu1, Jiang Hongfu2   

  1. 1. College of Energy Resources, China University of Geosciences, Beijing 100083, China;
    2. Daqing Oilfield Limited Company, Heilongjiang Daqing 163453, China
  • Received:2019-07-06 Revised:2020-08-27 Online:2020-10-25 Published:2020-11-05

摘要:

滦探1井首次在滦平盆地白垩系发现页岩油,填补了燕山构造带中生界油气发现的空白。综合岩心、镜下薄片、测井资料、录井资料和X射线衍射等分析化验资料,对滦平盆地白垩系西瓜园组页岩油储层特征展开研究。研究区西瓜园组页岩油储层主要包括泥页岩、粉砂岩、白云岩、长英质混合细粒岩、碳酸盐型混合细粒岩和黏土型混合细粒岩6种岩石类型。储集空间类型以孔隙和裂缝为主,裂缝包括构造缝、异常高压裂缝和层间缝,孔隙以晶间孔和溶蚀孔为主。页岩油储层孔隙度平均为1.6%,渗透率平均为0.265 mD,整体为低孔超低渗储层。根据岩性组合和录井显示,垂向上识别出2套页岩油储层。下部页岩油储层为火山—湖泊沉积,主要包括泥页岩、粉砂岩、白云岩、长英质混合细粒岩和碳酸盐型混合细粒岩等岩石类型,储集空间以孔隙为主,油气显示以黄绿色轻质油为主,见天然气产出;上部页岩油储层属于正常湖泊沉积,岩石类型以泥页岩、粉砂岩、碳酸盐型混合细粒岩、黏土型混合细粒岩和长英质混合细粒岩为主,储集空间以裂缝为主,见黑色重质油和天然气析出。分析认为,沉积环境、成岩作用、构造背景和总有机碳含量是西瓜园组页岩油储层发育的主要控制因素。

关键词: 页岩油, 岩石类型, 储集空间, 控制因素, 西瓜园组, 滦平盆地

Abstract:

Shale oil was first discovered in Well Luantan 1 in the Cretaceous of Luanping Basin, filling the gap in the discovery of Mesozoic oil and gas in the Yanshan structural belt. Based on analysis and laboratory data such as cores, thin sections under microscope, logging data, mud logging data and X-ray diffraction, a study is performed on the characteristics of shale oil reservoirs in the Cretaceous Xiguayuan Formation in Luanping Basin. The shale oil reservoirs of Xiguayuan Formation in the study area mainly include six rock types:shale, siltstone, dolomite, mixed fine-grained felsic rock, carbonate-type mixed fine-grained rock and clay-type mixed fine-grained rock. The reservoir space is dominated by pores and fractures. The fractures include tectonic fracture, abnormally high pressure fracture and interlayer fracture. The pores are dominated by intercrystalline pores and dissolved pores. The average porosity of the shale oil reservoir is 1.6%, and the average permeability is 0.265 mD, indicating the dominant development of low porosity and ultra-low permeability reservoir. According to the lithology combination and logging display, two sets of shale oil reservoirs were identified vertically. The lower shale oil reservoirs are volcanic-lacustrine deposits, mainly containing shale, siltstone, dolomite, mixed fine-grained felsic rock and carbonate-type mixed fine-grained rock. The reservoir space is predominated by pores. The hydrocarbon resource is mainly shown as yellow-green light oil, and natural gas is produced. The upper shale oil reservoir is consisted of normal lacustrine deposits, and the rock types are presented as shale, siltstone, carbonate-type mixed fine-grained rock, and clay-type mixed fine-grained rock and mixed fine-grained felsic rock. The reservoir space is dominated by fractures, and black heavy oil and gas are precipitated. The analysis suggests that sedimentary environment, diagenesis, tectonic background and total organic carbon are the main controlling factors for the development of shale oil reservoirs in the Xiguayuan Formation.

Key words: shale oil, rock type, reservoir space, controlling factor, Xiguayuan Formation, Luanping Basin

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