油气藏评价与开发 ›› 2018, Vol. 8 ›› Issue (3): 51-54.

• 石油工程 • 上一篇    下一篇

无机地质聚合物凝胶封堵效果和储层适应性研究

葛嵩1,卢祥国1,刘进祥1,孟祥海2,张云宝1,2   

  1. 1. 东北石油大学提高油气采收率教育部重点实验室,黑龙江 大庆 163318
    2. 中海石油(中国)有限公司天津分公司研究院,天津 塘沽 300450
  • 收稿日期:2017-07-01 出版日期:2018-06-26 发布日期:2018-12-07
  • 作者简介:葛嵩(1992—),男,在读硕士研究生,提高油气采收率研究。
  • 基金资助:
    国家自然科学基金“抗盐型聚合物油藏适应性及其改进方法基础研究”(51574086);国家科技重大专项“渤海双高油田多级窜逸堵调驱一体化技术研究及示范”(2016ZX05058-003-010);中海石油(中国有限公司天津分公司重点科技攻关课题“无机复合地质聚合物凝胶调剖技术及其配套方法研究”CCL2016TJTJLST0676)

Study on plugging effect and reservoir adaptability of inorganic geopolymer gel

Ge Song1,Lu Xiangguo1,Liu Jinxiang1,Meng Xianghai2,Zhang Yunbao1,2   

  1. 1. Key Laboratory of Enhanced Oil Recovery of Education Ministry, Northeast Petroleum University, Daqing, Heilongjiang 163318, China
    2. Tianjin Branch of CNOOC Ltd., Tanggu, Tianjin 300450, China
  • Received:2017-07-01 Online:2018-06-26 Published:2018-12-07

摘要:

渤海主要油藏具有储层非均质性严重、单井注入量大和岩石胶结强度低等特点,长期注水和注聚已形成水流优势通道和由此引起的注入水低效和无效循环问题。通过静态成胶和岩心驱替实验,评价了新型无机地质聚合物凝胶封堵剂固化时间、封堵效果和储层适应性。结果表明,无机地质聚合物凝胶固化时间易于调节,固化时间在20 ~ 480 h可调。在填砂管上开展封堵实验,封堵率可达99 %以上。采用填砂管与人造均质岩心的双管并联模型进行封堵实验,封堵后高渗透层封堵率达到98 %以上,低渗透层渗透率几乎未发生变化。由此可见,无机地质聚合物凝胶具有“堵大不堵小”特性,适宜于储层内特高渗透条带或大孔道封堵。

关键词: 无机地质聚合物凝胶, 固化时间, 封堵率, 启动压力, 储层伤害

Abstract:

The main reservoirs in Bohai have the characteristics of serious reservoir heterogeneity, large injection rate of single well and low cementation strength of rock. Due to the long-term water injection and polymer flooding, the rock structure has been destroyed and the dominant channel of water flow has been formed. This problem has caused the inefficient and ineffective circulation of the injected water. In this paper, we evaluated the gelling time, the plugging effect and the reservoir adaptability of the new inorganic geopolymer gel plugging agent by the static gelling test and the core displacement test. The results show that it is easy to adjust the curing time of the inorganic geopolymer gel. The curing time is adjustable between 20 ~ 480 hours. Based on the plugging experiments of the sandpack pipe, the plugging rate of the inorganic geopolymer gel was over 99 %. While the plugging experiment of a double pipe parallel model composed of the sandpack pipe and artificial homogeneous core bring us a plugging rate of high permeability layer more than 98 %. The permeability of the low permeability layer is almost unchanged. Therefore, the inorganic geological polymer gel has the advantages of plugging the large channel but not for the small pores. It is suitable for the plugging of the zones with ultra high permeability or the large channels in the reservoir.

Key words: inorganic geopolymer gel, gelling time, plugging rate, start-up pressure, reservoir damage

中图分类号: 

  • TE357