岩性油气藏 ›› 2016, Vol. 28 ›› Issue (5): 44–51.doi: 10.3969/j.issn.1673-8926.2016.05.005

• 油气地质 • 上一篇    下一篇

川东南地区娄山关群白云岩储层特征及主控因素

江文剑1,侯明才1,2,邢凤存1,2,李 勇3,石 鑫1,王 超1,4   

  1. (1.成都理工大学 沉积地质研究院,成都 610059; 2.油气藏地质与开发工程国家重点实验室(成都理工大学),成都 610059; 3.核工业 208 研究所,四川 广汉 618300;4.中国石化华北石油工程有限公司,郑州 450000)
  • 出版日期:2016-09-29 发布日期:2016-09-29
  • 通讯作者: 侯明才(1968-),男,教授,博士生导师,主要从事大地构造沉积学和层序岩相古地理学的教学和科研工作。E?mail:houmc@cdut.edu.cn。
  • 作者简介:江文剑(1984-),男,成都理工大学在读博士研究生,研究方向为储层沉积学。地址:(610059)四川省成都市成华区二仙桥东三路 1 号成都理工大学沉积地质研究院。E-mail:jiangwj2014@qq.com
  • 基金资助:

    中国地质调查局油气资源调查项目“中国西部主要大型盆地碳酸盐岩油气资源调查评价”(编号:212011220758)资助

Characteristics and main controlling factors of dolomite reservoirs of Cambrian Loushanguan Group in the southeastern Sichuan Basin

Jiang Wenjian1, Hou Mingcai 1,2, Xing Fengcun 1,2, Li Yong3, Shi Xin1, Wang Chao1,4   

  1. (1. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China; 2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China;3. No. 208 Research Institute of Nuclear Industry, Guanghan 618300, Sichuan, China; 4. North China Petroleum Engineering Co. Ltd., Sinopec, Zhengzhou 450000, China)
  • Online:2016-09-29 Published:2016-09-29

摘要:

川东南地区寒武系娄山关群发育厚层白云岩,具有良好的油气勘探潜力,但勘探程度相对较低,白云岩储层特征研究相对薄弱。在野外地质观察的基础上,通过对来自研究区京竹和中坝两剖面的岩石样品进行铸体薄片观察和物性测试,开展了岩石学、储集空间及储集物性特征等研究,系统分析了白云岩储层发育特征及其主控因素。研究认为:可作为良好油气储集层的岩石类型为晶粒白云岩和颗粒白云岩,储集空间主要为晶间孔、晶间溶孔、粒间孔、粒间溶孔和非选择性溶孔;孔隙度和渗透率相关性较好,但不同岩石类型孔隙发育程度差异较大;白云岩储层发育受到多种因素的控制,其中高能相带控制着储层展布,白云岩化和热液溶蚀作用对储层物性的改善具有建设性作用,孔隙发育层段多位于三级层序向上变浅旋回的顶部。研究成果可为川东南地区白云岩储层下一步的油气勘探提供依据,同时,也可为其他地区的古老地层白云岩储层研究提供一定的借鉴。

关键词: 灰岩储层, 缓坡相, 主控因素, 卡洛夫—牛津阶, 别什肯特坳陷区, 土库曼斯坦

Abstract:

A large number of dolomite developed in Cambrian Loushanguan Group in the southeastern Sichuan Basin, with good oil and gas exploration prospect. However, the exploration degree in the study area is relatively low, and there are few studies on the characteristics of dolomite reservoir. Based on the outcrop observation, combined with cast thin section observation and physical property test of the samples from Jingzhu and Zhongba profile, the data of petrology, reservoir space and physical properties were applied to study the characteristics and main controlling factors of dolomite reservoirs. The result shows that the reservoir rocks are mainly crystalline dolomite and grain dolomite, the main reservoir spaces are intercrystalline pores and intercrystalline dissolved pores, intergranular pores, intergranular dissolved pores and nonselective dissolved pores. The porosity is well correlated to permeability, but pores varied greatly in different types of rock. The dolomite reservoir quality is affected by multiple factors, and the high energy environment controls reservoir distribution. The dolomitization and hydrothermal fluid dissolution improve the reservoir properties. The good quality reservoirs are mainly developed at the top of the upward shallowing cycles of the third?order sequence. This study results are basis for the next hydrocarbon exploration in the southeastern Sichuan Basin, and reference for the study on dolomite reservoir in other areas.

Key words: limestone reservoir, ramp facies, controlling factor, Callovian-Oxfordian, Bieshikent Depression, Turkmenistan

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