岩性油气藏 ›› 2017, Vol. 29 ›› Issue (1): 11–20.doi: 10.3969/j.issn.1673-8926.2017.01.002

• 油气地质 • 上一篇    下一篇

致密砂岩气地质认识新进展

魏新善1,2, 胡爱平1,2, 赵会涛1,2, 康锐1,2, 石晓英1,2, 刘晓鹏1,2   

  1. 1. 中国石油长庆油田分公司 勘探开发研究院, 西安 710021;
    2. 低渗透油气田勘探开发国家工程实验室, 西安 710021
  • 收稿日期:2016-06-22 修回日期:2016-07-26 出版日期:2017-01-21 发布日期:2017-01-21
  • 作者简介:魏新善(1962-),男,博士,高级工程师,主要从事油气地质综合研究工作。地址:(710021)陕西省西安市未央区兴隆园小区长庆油田分公司勘探开发研究院。Email:wxs_cq@petrochina.com.cn。
  • 基金资助:
    中国石油长庆油田分公司项目“鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程”(编号:2011ZX05044)资助

New geological understanding of tight sandstone gas

WEI Xinshan1,2, HU Aiping1,2, ZHAO Huitao1,2, KANG Rui1,2, SHI Xiaoying1,2, LIU Xiaopeng1,2   

  1. 1. Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Xi'an 710021, China;
    2. National Engineering Laboratory for Exploration and Development in Low Permeability Oil and Gas Fields, Xi'an 710021, China
  • Received:2016-06-22 Revised:2016-07-26 Online:2017-01-21 Published:2017-01-21

摘要: 随着致密砂岩气勘探开发实践的不断深入,传统的地质认识暴露出很多局限性及与实际地质情况不相符的特性。在调研国内外致密砂岩气勘探开发历史经验的基础上,以鄂尔多斯盆地致密砂岩大气田勘探开发揭示的实际资料为依据,通过核磁共振及气水相渗分析、等温吸附实验、气藏地层压力恢复等研究,对传统的致密砂岩气地质特征认识进行了补充与完善。结果表明:致密砂岩气一般为多个压力系统气藏组成的大气田,这一特征决定了致密砂岩气勘探开发需要密井网,而不是常规气藏勘探开发的稀井网;致密砂岩气储层含水饱和度变化较大,具有超低含水饱和度特征,容易形成水锁伤害,在开发过程中必须做好储层伤害保护;致密砂岩气藏开发后期产水严重,如何“治水”是开发的关键问题;致密砂岩气储层中存在一定量的吸附气,这对于致密砂岩气储层含气特征及渗流规律描述、单井产能预测、资源量计算与储量评估都具有重要意义。

关键词: 致密砂岩气, 地质特征, 含水饱和度, 压力系统, 吸附气, 苏里格气田, 鄂尔多斯盆地

Abstract: With the exploration and development practice of tight sandstone gas, the traditional geological understanding exposed many limitations and is inconsistent with practical data. Based on practical data from the exploration and development and experimental data from nuclear magnetic resonance, gas phase permeation analysis, isothermal adsorption experiment and gas reservoir paleo-pressure recovery of tight sandstone gas reservoirs in Ordos Basin, the knowledge of the geological characteristics of tight sandstone gas was supplemented and improved. we get some new geological understandings of tight sandstone gas:(1)the tight sandstone gas field composes of multiple pressure systems reservoir, which determines the need of dense well pattern rather than that of conventional gas reservoir dilute well wide agent and dilute well development;(2)the change of water saturation in tight sandstone reservoirs is great, and there also exists the phenomenon of super low water saturation, which is easy to form water block damage, so it demands to do best in reservoir damage protection;(3)water production is serious in the late development stage of tight sandstone gas reservoirs, so how to control the water production is the key problem in the phase of gas development;(4)there is a certain amount of adsorbed gas in tight sandstone gas reservoirs, which is important for the description of tight sandstone gas reservoir characteristics and seepage law, the prediction of single well productivity, the precise calculation of tight sandstone gas resource and reserves evaluation.

Key words: tight sandstone gas, geologic characteristics, water saturation, pressure system, adsorbed gas, Sulige Gasfield, Ordos Basin

中图分类号: 

  • TE132
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