西南石油大学学报(自然科学版) ›› 2024, Vol. 46 ›› Issue (3): 50-65.DOI: 10.11885/j.issn.1674-5086.2022.03.14.01

• 地质勘探 • 上一篇    下一篇

沙湾凹陷上乌尔禾组储层特征及控制因素分析

胡婷婷1, 余海涛1, 吴晨骁1, 关键1, 于景维2   

  1. 1. 中国石油新疆油田分公司勘探开发研究院, 新疆 乌鲁木齐 830014;
    2. 中国石油大学(北京)克拉玛依校区, 新疆 克拉玛依 834000
  • 收稿日期:2022-03-14 发布日期:2024-06-26
  • 通讯作者: 于景维,E-mail:yyjjww-1985@163.com
  • 作者简介:胡婷婷,1979年生,女,汉族,新疆乌鲁木齐人,高级工程师,硕士,主要从事油气综合地质研究工作。E-mail:hutt@petrochina.com.cn;余海涛,1985年生,男,汉族,四川遂宁人,高级工程师,硕士,主要从事油气综合地质研究。E-mail:yhaitao@petrochina.com.cn;吴晨骁,1990年生,男,汉族,新疆乌鲁木齐人,工程师,硕士,主要从事油气综合地质研究。E-mail:wchenxiao@petrochina.com.cn;关键,1981年生,男,汉族,山西襄汾人,高级工程师,主要从事油气综合地质研究。E-mail:wchenxiao@petrochina.com.cn;于景维,1985年生,男,汉族,河北石家庄人,副教授,博士,主要从事储层沉积学、层序地层学相关的教学和研究工作。E-mail:yyjjww-1985@163.com
  • 基金资助:
    新疆维吾尔自治区自然科学基金面上项目(2021D01A201)

Reservoir Characters and Controlling Factors of Upper Urhe Formation in Shawan Sag

HU Tingting1, YU Haitao1, WU Chenxiao1, GUAN Jian1, YU Jingwei2   

  1. 1. Exploration and Development Institute, Xinjiang Oilfield Company, PetroChina, Urumqi, Xinjiang 830014, China;
    2. Karamay Campus of China University of Petroleum, Karamay, Xinjiang 834000, China
  • Received:2022-03-14 Published:2024-06-26

摘要: 沙湾凹陷上乌尔禾组成藏条件同玛湖凹陷相似,但储层基本特征以及控制因素较为模糊,阻碍了该地区目的储层进一步勘探和开发。在前人研究基础上,利用岩芯观察、薄片、扫描电镜、压汞及物性等研究手段,对研究区上乌尔禾组分段的储层岩石学特征、储集特征及控制因素进行详细分析。结果表明,乌一段岩性以砂砾岩为主,储集空间以原生粒间孔为主,普遍见片状片弯状喉道,属于特低孔特低渗储层;乌二段岩性以含砾砂岩为主,储集空间以原生粒间孔和粒间溶孔为主,发育片状喉道,属于低孔中低渗储层。沉积和成岩因素为储层质量主要控制因素,沉积环境和凝灰质含量控制优质储层的分布和储集性能,成岩因素中压实作用对储层物性影响最大,胶结和溶蚀作用造成储层物性进一步产生差异,异常压力对储层质量有一定的改善。以上因素造成乌二段孔隙结构较为复杂,储层质量相对较好。

关键词: 上乌尔禾组, 储层特征, 控制因素, 沙湾凹陷, 准噶尔盆地

Abstract: Upper Urhe Formation in Shawan Sag has the similar reservoir conditions with that in Mahu Sag, but basic characters and controlling factors of objective reservoirs in Shawan Sag have not been clarified clearly, which hinders further exploration. On the basis of observation of drilling cores, analysis of thin sections, SEM, pressure mercury and physical property, we analyze the petrological, reservoir characteristics and their controlling factors of the study area. The results show main rock type in the first member of Upper Urhe Formation is sandy conglomerates, and reservoir spaces are mainly primary inter-granular pore and flake curved throat type, which suggests extra-low porosity and extra-low permeability reservoir. Main rock type in second member of Upper Urhe Formation is conglomeratic sandstone, and reservoir spaces are mainly primary inter-granular and intergranular dissolved pores, with flake throat, which suggests reservoir belong to low porosity and low permeability reservoir. Controlling factors of reservoir quality are mainly sedimentary factor and diagenesis factor. Sedimentary environment and tuffaceous content decide distribution of reservoirs of high quality and reservoir property, and compaction has the greatest effects on physical property of reservoirs, with cementation and dissolution causing further difference to physical property. Abnormal pressure improves reservoir quality in a certain degree. All controlling factors make pore structures more complex in second member of Upper Urhe Formation, and reservoir property better.

Key words: Upper Urhe Formation, reservoir characters, controlling factors, Shawan Sag, Junggar Basin

中图分类号: