吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (4): 1070-1082.doi: 10.13278/j.cnki.jjuese.201704109

• 地质与资源 • 上一篇    下一篇

鄂尔多斯盆地东南部山西组泥岩封盖性能评价

李亚龙, 于兴河, 单新, 王娇, 史新, 胡鹏   

  1. 中国地质大学(北京)能源学院, 北京 100083
  • 收稿日期:2016-11-08 出版日期:2017-07-26 发布日期:2017-07-26
  • 通讯作者: 于兴河(1958),男,教授,博士生导师,主要从事沉积学、储层表征建模及油气地质研究,E-mail:billyu@cugb.edu.cn E-mail:billyu@cugb.edu.cn
  • 作者简介:李亚龙(1992),男,硕士研究生,主要从事储层沉积学研究,E-mail:1454446894@qq.com
  • 基金资助:
    国家自然科学基金项目(41472091)

Evaluation on Sealing Capability of Shanxi Formation in Southeast Ordos Basin

Li Yalong, Yu Xinghe, Shan Xin, Wang Jiao, Shi Xin, Hu Peng   

  1. School of Energy Resources, China University of Geosciences, Beijing 100083, China
  • Received:2016-11-08 Online:2017-07-26 Published:2017-07-26
  • Supported by:
    Supported by National Natural Science Foundation of China (41472091)

摘要: 为弥补鄂尔多斯盆地东南部盖层的研究空白,借鉴已有研究成果与盖层基本特征,选取泥岩孔隙度、渗透率、厚度以及排替压力4个参数,结合灰色理论分析方法,对鄂尔多斯盆地东南部山西组泥岩盖层封盖性能进行了综合定量评价。结果表明:盆地东南部泥岩北东部较厚,整体呈从北向南减薄的趋势,南部孔隙度及渗透率均偏高;泥岩盖层排替压力较大,大于8 MPa的平面面积占70%以上;由灰色理论打分评价可知,山西组整体盖层封盖性能较好,封盖能力特强(I类盖层)、封盖能力强(II类盖层)的盖层分布区域广泛,Ⅰ类和II类盖层主要发育于盆地北部、北东部,中部延长、延安、志丹等周边地区,盖层封盖性好,III类盖层(封盖能力中等)、IV类盖层(封盖能力差)主要发育于南部。盖层发育较好的地区,经勘探开发与试气,单井日产量可达上万方,证明评价结果与勘探实践匹配。

关键词: 灰色理论, 排替压力, 孔隙度, 渗透率, 山西组, 鄂尔多斯盆地东南部

Abstract: No previous researches have been conducted regarding sealing ability of seal in southeast Ordos basin. In order to evaluate the sealing ability in the study area, four indexes including porosity, permeability, mudstone thickness, and displacement pressure were chosen based on grey system theory. The results indicate that the mudstone thickness is thicker in north and east part of the area, which shows a decreasing thickness from north to south. In the south of the study area, the porosity and permeability increase and the displacement pressures of the seal are higher. The area where displacement value is more than 8 MPa accounts for 70% of the study area. The quality of sealing capacity of Shanxi Formation is good and with a wide distribution of type I and type II. Type I and type II distributed commonly in north and east part as well as areas surrounding City Yanchang, Yan'an and Zhidan. Type III and type IV developed mainly in the south of the study area. The study has been proved that the well evaluated areas have ten thousands m3 output in a single well per day. The research conducted will guide next step of gas exploration and exploitation in southeast Ordos basin.

Key words: grey theory, displacement pressure, porosity, permeability, Shanxi Formation, southeast Ordos basin

中图分类号: 

  • P618.13
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