油气藏评价与开发 ›› 2019, Vol. 9 ›› Issue (2): 1-6.

• 油气地质 •    下一篇

甘谷驿油田L2区特低渗储层非均质性及其对油层分布的影响

李明1,戚楠2,陈朝兵3,朱玉双1,张全培1   

  1. 1. 西北大学大陆动力学国家重点实验室/地质学系,陕西 西安 710069
    2. 中国石油集团测井有限公司华北分公司,河北 任丘 062550
    3. 西安石油大学地球科学与工程学院,陕西 西安 710065
  • 收稿日期:2018-11-27 出版日期:2019-04-26 发布日期:2019-05-07
  • 作者简介:李明(1994—),男,在读硕士研究生,油气田开发地质。
  • 基金资助:
    国家自然科学基金"深水相高杂基对致密砂岩微观孔喉结构及渗流能力影响评价"(41802140)

Extra-low permeability reservoir heterogeneity and its effect on the distribution of reservoirs in L2 area of Ganguyi Oilfield

Li Ming1,Qi Nan2,Chen Chaobing3,Zhu Yushuang1,Zhang Quanpei1   

  1. 1. State Key Laboratory of Continental Dynamics/Department of Geology, Northwest University, Xi'an, Shaanxi 710069, China
    2. Huabei Branch, China Petroleum Logging CO., LTD., Renqiu, Hebei 062550, China
    3. School of Earth Sciences and Engineering, Xi'an Shiyou University, Xi'an, Shaanxi 710065, China
  • Received:2018-11-27 Online:2019-04-26 Published:2019-05-07

摘要:

鄂尔多斯盆地甘谷驿油田长61油层亚组作为研究区主力含油层系,勘探开发实践表明,储集层特征在三维空间表现出强烈的非均质性,油层在垂向和平面上分布规律复杂,制约了后续的滚动勘探开发工作。本次研究以岩心观察和测井资料为出发点,结合分析测试资料,从层内、层间、平面展开,系统全面分析储层宏观非均质性对油层分布的控制作用。研究区长61油层分布的复杂性由多种因素综合导致而成,其中,沉积微相和成岩相对优质储集层的分布起主要控制作用,层间非均质性,尤其是层间渗透率的非均质性易造成原油选择性充注,而层内非均质性直接导致复合砂体内部原油不均一分布。通过本次研究,能够更好理解鄂尔多斯盆地特低、超低渗油层的分布规律,为后期寻找有利区带提供指导意见。

关键词: 特低渗储层, 储层非均质性, 油层分布, 甘谷驿油田

Abstract:

The Chang 61 reservoir was the main oil-bearing beds in the study area of Ganguyi Oilfield in Ordos Basin. The exploration and development practice showed that the reservoir characteristics had strong heterogeneity in three-dimensional space, and the vertical and horizontal distribution of the reservoirs were complex, which directly restrictsed the subsequent rolling exploration and development. In the study, based on the core observations and logging data, and combined with analytical testing, the controlling effect of the reservoir macroscopic heterogeneity on the oil layer distribution was systematically and visually analyzed. The complexity of the Chang 61 reservoir in the study area was caused by a variety of factors. Among them, the distribution of the sedimentary microfacies and diagenetic facies directly controlled that of the high quality reservoirs. And the interlayer heterogeneity, especially the interlayer permeability, was easy to cause the selective filling of oil, while the interlayer heterogeneity directly caused the heterogeneous distribution of oil in composite sand body. Through this study, the distribution law of ultra-low permeability and ultra-low permeability reservoirs in Ordos Basin could be better understood intuitively, which provides guidance for finding favorable zones in the future.

Key words: extra-low permeability reservoir, reservoir heterogeneity, distribution of oil layer, Ganguyi Oilfield

中图分类号: 

  • TE122