岩性油气藏 ›› 2019, Vol. 31 ›› Issue (3): 1–9.doi: 10.12108/yxyqc.20190301

• 油气地质 •    下一篇

鄂尔多斯盆地下寺湾油田长3油层组储层特征及控藏机理

王桂成, 曹聪   

  1. 西安石油大学 地球科学与工程学院, 西安 710065
  • 收稿日期:2018-12-18 修回日期:2019-02-26 出版日期:2019-05-21 发布日期:2019-05-06
  • 第一作者:王桂成(1966-),男,博士,教授,主要从事油气勘探与开发方面的教学和科研工作。地址:(710065)陕西省西安市雁塔区电子二路18号西安石油大学地球科学与工程学院。Email:903998743@qq.com
  • 通信作者: 曹聪(1995-),男,西安石油大学在读硕士研究生,研究方向为油田勘探开发。Email:775925457@qq.com。
  • 基金资助:
    国家科技重大专项“塔里木深层成岩作用与储层表征”（编号：2017ZX05005-002-004）和陕西省自然科学基金“连续型油藏砂岩输导体系与石油运移时效性探讨”（编号：2013JM5006）联合资助

Characteristics and reservoir-control mechanism of Chang 3 reservoir in Xiasiwan Oilfield,Ordos Basin

WANG Guicheng, CAO Cong   

  1. College of Earth Sciences & Engineering, Xi'an Shiyou University, Xi'an 710065, China
  • Received:2018-12-18 Revised:2019-02-26 Online:2019-05-21 Published:2019-05-06

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摘要： 鄂尔多斯盆地延长组长3油层组油藏与其他油层组油藏基本相似，但发现的储量最少。应用下寺湾油田岩心、测井、录井、试油、试采等资料，探讨长3油层组储层发育特征及油气成藏的控制因素。结果表明：下寺湾油田长3油层组构造较平缓，发育近东西向的鼻状构造；属于三角洲平原亚相沉积，其微相类型有分支河道、陆上天然堤、决口扇和沼泽微相，分支河道微相是砂体最发育的相带；储层岩性以细粒长石砂岩为主，主要孔隙类型为粒间孔隙，平均孔隙度为12.4%，平均渗透率为1.28 mD，属于低孔、低渗储层；油藏主要受岩性控制，其次受构造因素影响，属于构造-岩性油藏。该研究成果对长3油层组油气勘探具有指导作用。

关键词: 沉积相, 储层特征, 控藏机理, 长3油层组, 鄂尔多斯盆地

Abstract: Chang 3 reservoir of Yanchang Formation in Ordos Basin is similar to other reservoirs, but the reserves are the least. The data of cores, well logging, mud logging, oil testing and test mining in Xiasiwan Oilfield were applied to study the development characteristics and controlling factors of hydrocarbon accumulation of Chang 3 reservoir. The results show that the structure of Chang 3 reservoir in Xiasiwan Oilfield is relatively gentle and develops a EW-trending nose-shape structure. It belongs to delta plain subfacies, and its microfacies include branch channel, onshore natural dike, crevasse fan and marsh. Sand body is mostly developed in the branch channel microfacies. Reservoir lithology is dominated by fine-grained feldspathic sandstones, and the main pore type is intergranular pores. The average porosity is 12.4%, and the average permeability is 1.28 mD, with lowporosity and low-permeability. The reservoir is mainly controlled by lithology, followed by structural factors, which belongs to structural-lithologic reservoirs. The research results have a guiding role for oil and gas exploration in Chang 3 reservoir.

Key words: sedimentary facies, reservoir characteristics, reservoir-control mechanism, Chang 3 reservoir, Ordos Basin

中图分类号: 

  • TE122.2
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