暂堵剂高温封堵机理及实验评价

doi:10.3969/j.issn.1006-396X.2022.02.010

石油化工高等学校学报 ›› 2022, Vol. 35 ›› Issue (2): 62-67.DOI: 10.3969/j.issn.1006-396X.2022.02.010

暂堵剂高温封堵机理及实验评价

王荣¹(), 袁立山²(), 罗垚¹, 杨旭达², 吕蓓¹, 程家麒²

^1.中国石油新疆油田分公司工程技术研究院，新疆克拉玛依 834000
^2.中国石油大学（北京）非常规油气科学技术研究院，北京 102249

收稿日期:2021-07-25 修回日期:2021-10-20 出版日期:2022-04-25 发布日期:2022-06-10
通讯作者: 袁立山
作者简介:王荣（1981⁃），男，硕士，工程师，从事储层改造方面研究；E⁃mail:wangrong_cy@petrochina.com.cn。

High Temperature Plugging Mechanism and Experimental Evaluation of Temporary Plugging Agent

Rong Wang¹(), Lishan Yuan²(), Yao Luo¹, Xuda Yang², Lü Bei¹, Jiaqi Cheng²

^1.Engineering Technology Research Institute，PetroChina Xinjiang Oilfield Company，Karamay Xinjing 834000，China
^2.Unconventional Oil and Gas Research Institute，China University of Petroleum（Beijing），Beijing 102249，China

Received:2021-07-25 Revised:2021-10-20 Published:2022-04-25 Online:2022-06-10
Contact: Lishan Yuan

摘要/Abstract

摘要：

准葛尔盆地南缘深层气藏埋藏深，具有高温高压、非均质性较强等特点，采用暂堵转向分层分段改造工艺实现了高效改造，提高了储集层动用程度。开展了140~180 ℃高温条件下暂堵剂对裂缝和炮眼的封堵实验研究，针对性评价了5种暂堵材料的降解速率和承压能力。结果表明，常用的暂堵材料在高温下会软化，在驱替压差下易随携带液流动，导致暂堵段承压能力下降，失去封堵效果。优选了在180 ℃下承压能力达30.00 MPa的暂堵材料，现场应用结果显示采用暂堵剂后产量显著增加。

关键词: 裂缝暂堵, 炮眼暂堵, 可降解材料, 承压能力

Abstract:

Given the deep burial depth,high temperature and high pressure, significant heterogeneity of the deep gas reservoirs in the southern margin of the Junggar Basin,the temporary plugging and diverting stimulation technology with stratification and segmentation was used to achieve efficient stimulation and improve the producing degree of those reservoirs.The plugging of fractures and perforations by temporary plugging agents under the high temperature of 140~180 ℃ was experimentally investigated,and the degradation rates and pressure?bearing capacities of five temporary plugging materials were evaluated respectively.The results show that the commonly used temporary plugging materials will soften under a high temperature and tend to flow with the carrying fluid under the displacement pressure difference, resulting in a decreased pressure?bearing capacity of the temporary plugging section and the loss of plugging effect. A temporary plugging material with a pressure?bearing capacity of 30.00 MPa at 180 ℃ was selected, and its field application results showed that the temporary plugging improved production significantly.

Key words: Temporary plugging of fractures, Temporary plugging of perforations, Degradable material, Pressure?bearing capacity

中图分类号:

TE355

王荣, 袁立山, 罗垚, 杨旭达, 吕蓓, 程家麒. 暂堵剂高温封堵机理及实验评价[J]. 石油化工高等学校学报, 2022, 35(2): 62-67.

Rong Wang, Lishan Yuan, Yao Luo, Xuda Yang, Lü Bei, Jiaqi Cheng. High Temperature Plugging Mechanism and Experimental Evaluation of Temporary Plugging Agent[J]. Journal of Petrochemical Universities, 2022, 35(2): 62-67.

图/表 10

表1 胍胶携带液配方

Table 1 Composition of guar carrying fluid

成分	质量浓度/(g $⋅$ mL ^-1)
羟丙基胍胶	0.003 0
柠檬酸	0.000 2
pH调节剂	0.001 5
交联剂	0.003 0

表1 胍胶携带液配方

Table 1 Composition of guar carrying fluid

成分	质量浓度/(g $⋅$ mL ^-1)
羟丙基胍胶	0.003 0
柠檬酸	0.000 2
pH调节剂	0.001 5
交联剂	0.003 0

图1 模拟高温暂堵实验装置

Fig.1 Experimental device for simulating temporary blocking at high temperature

图2 模拟炮眼和裂缝装置（a）模拟炮眼（b）模拟裂缝

Fig.2 Simulated perforation and fracture devices

图3 不同温度下裂缝暂堵压力对比

Fig.3 Comparison of fracture temporary plugging pressure at different temperatures

图4 不同温度下裂缝内暂堵段中暂堵材料结构

Fig.4 Structure of temporary plugging material for internal cracks at different temperatures

图5 不同温度下炮眼暂堵压力对比

Fig.5 Comparison of perforation temporary plugging pressure at different temperatures

图6 不同温度下炮眼暂堵段实物

Fig.6 Photos of the temporarily plugging section in the perforation at different temperatures

图7 不同暂堵材料降解率对比

Fig.7 Comparison of degradation rates of different temporary plugging materials

图8 不同暂堵材料在高温条件下的暂堵压力对比

Fig.8 Comparison of temporary plugging pressure of different types of temporary plugging materials at high temperature

图9 BZ井施工压力曲线

Fig.9 Treating pressure curve of well BZ

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暂堵剂高温封堵机理及实验评价

High Temperature Plugging Mechanism and Experimental Evaluation of Temporary Plugging Agent

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