4/4/2025, 3:05:12 AM 星期五
地热井暂堵型水泥基透水材料的试验研究
CSTR:
作者:
作者单位:

成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川 成都 610059

中图分类号:

P634.8

基金项目:

国家自然科学基金项目“基于温敏聚合物的地热井暂堵型高透水固结材料研究”(编号:41902322)


Research and development of cement-based temporary plugging permeable material
Author:
Affiliation:

State Key Laboratory of Geohazard Prevention and Geoenviroment Protection, Chengdu University of Technology, Chengdu Sichuan 610059, China

  • 摘要
  • | |
  • 访问统计
  • |
  • 参考文献 [15]
  • |
  • 相似文献 [20]
  • | | |
  • 文章评论
    摘要:

    地热开采过程中,考虑到水源补给,地热井一般布置在破碎带或构造带上,在钻井过程中利用水泥进行堵漏,但在钻井完毕后为提高产能必须进行解堵。而常规水泥在对地层封堵后需要恢复储层渗透性时,只能通过采取酸化解堵措施,且解堵恢复能力差。如果利用地热开发过程中的温度变化制得可降解暂堵水泥体系,简化地热资源的勘探开发过程,有利于降低钻井成本和风险。本文利用G级油井水泥、砂石、增强剂和水溶性纤维制备温敏型暂堵高透水水泥基材料。通过测试材料的抗压强度、孔隙度、密度、凝结时间,以评价其降解效果及基本性能。结果显示,水溶性纤维的加入使水泥抗压强度明显降低,而增强剂可以稍微改善这一缺陷,90 ℃水浴养护后孔隙度明显高于对照组,并且随着时间的推移,孔隙度不断提升,为水泥基暂堵透水材料成功研制奠定了基础,增强剂和纤维都会减少水泥的凝结时间,纤维降低凝结时间的效果更为明显。该材料的研制将简化地热资源的勘探开发过程,有利于降低钻井成本和风险。

    Abstract:

    In the process of geothermal exploitation, considering water recharge, geothermal wells are generally arranged in broken zones or structural zones, and cement is used for plugging during the drilling process; in the end, plugging must be removed after drilling is completed so as to increase productivity. With conventional cement, plugging can only be removed by acidification in case that the permeability of the reservoir needs to be restored, and the ability to remove the plugging is poor. If temperature change in the geothermal development process can be used to prepare a degradable temporary plugging cement system, the exploration and development process of geothermal resources will be simplified, which will help reduce drilling costs and risks. In this paper, G-grade oil well cement, sand and gravel, reinforcing agents and water-soluble fibers are used to prepare temperature-sensitive, temporary plugging, and highly permeable cement-based materials. The material''s compressive strength, porosity, density, and setting time were tested to evaluate its degradation effect and basic performance. The results showed that the addition of water-soluble fiber significantly reduced the compressive strength of cement, while the reinforcing agent can slightly improve this defect. The porosity after curing in a water bath at 90°C was significantly higher than the control group, and the porosity continued to increase over time, which lays the foundation for the successful development of cement-based temporary plugging and permeable materials. Reinforcing agents and fibers will reduce the setting time of cement, while the effect of fibers in reducing the setting time is more obvious. The development of this material will simplify the exploration and development process of geothermal resources and help reduce drilling costs and risks.

    参考文献
    [1] 贾军.建造EGS的高温地热钻井技术[R].成都:中国地质学会地热专业委员会,2018.
    [2] 唐胜利,闫鸽,徐堪社.牛场区块煤层气钻井堵漏技术研究[J].陕西煤炭,2019,38(1):26-29.
    [3] 钱洪强,王娟,孙玉东,等.天津地区地热钻井中地层漏失分析及堵漏方法选择[J].地质调查与研究,2016,39(3):226-230.
    [4] 季菊香.堵漏技术研究新进展[J].石化技术,2018,25(10):34.
    [5] Tuttle J, Listi R. A new geothermal drilling fluid: providing temperature stability, inhibition, and cost-effectiveness for worldwide applications[J]. GRC Transactions, 2003, 27: 47-51.
    [6] 韩金,李宝泰.盐井施工中刘家沟地层漏失及堵漏技术[J].陕西煤炭,2018,37(1):137-138,79.
    [7] Gao X, Xu Q L, Brouwers H J H. Characterization of alkali activated slag-fly ash blends containing nano-silica[J]. Construction and Building Materials,2015,98: 397-406.
    [8] 李飞跃.EGS地热井矿渣/粉煤灰可自降解水泥的实验研究[D].北京:中国地质大学(北京),2015.
    [9] JGJ/T 70—2009,建筑砂浆基本性能试验方法标准[S].
    [10] GB/T 17671—1999,水泥胶砂强度检验方法(ISO法)[S].
    [11] GB/T 19139—2012,油井水泥试验方法[S].
    [12] Sugama T, Pyatina T. Effect of sodium carboxymethyl celluloses on water-catalyzed self-degradation of 200 degrees C-heated alkali-activated cement[J]. Cement and Concrete composites, 2015, 55: 281-289.
    [13] Sugama T, Pyatina T. Utilization of PVA flakes in promoting self-degradation of temporary cementitious fracture sealing material[J]. GRC Transactions, 2014,38:331-338.
    [14] 凌妍,钟娇丽,唐晓山,等.扫描电子显微镜的工作原理及应用[J].山东化工,2018,47(9):78-79+83.
    [15] 蹇黎明,王胜,陈礼仪,等.地热开采低密度固井水泥试验研究[C]//中国地质学会.中国地质学会探矿工程专业委员会,2019.
    引证文献
    网友评论
    网友评论
    分享到微博
    发 布
引用本文

申岚,谭慧静,宋柏睿,等.地热井暂堵型水泥基透水材料的试验研究[J].钻探工程,2021,48(S1):243-248.
SHEN Lan, TAN Huijing, SONG Borui, et al. Research and development of cement-based temporary plugging permeable material[J]. Drilling Engineering, 2021,48(S1):243-248.

复制
分享
文章指标
  • 点击次数:427
  • 下载次数: 604
  • HTML阅读次数: 27
  • 引用次数: 0
历史
  • 收稿日期:2021-05-31
  • 最后修改日期:2021-05-31
  • 录用日期:2021-07-09
  • 在线发布日期: 2021-12-06
  • 出版日期: 2021-09-01
文章二维码