Study and Application of the Mechanism of Reducing Sandstone Reservoir Damage by HPG with Repair Agent
-
摘要: 砂岩储层水力压裂改造过程中羟丙基胍胶（HPG）吸附滞留伤害较大，亟需解决。研究采用修复剂降低HPG对砂岩储层的吸附伤害，提高砂岩储层的压裂效果。通过光谱法定量研究HPG在砂岩中的吸附滞留量，通过核磁共振表征了修复剂降低HPG吸附伤害的作用效果，确定了修复剂的最优加量，探究了温度和滞留时间对修复剂性能的影响。通过X光电子能谱、扫描电镜和接触角实验揭示了修复剂降低HPG吸附伤害的作用机理。研究表明：3000 mg/L为修复剂的最优加量，渗透率伤害降低了29.31%。温度对修复剂性能影响较小；而修复剂降低伤害效果随滞留时间先减小后增大。修复剂通过氢键抑制作用、优先占据吸附位点、增大界面接触角来降低HPG在砂岩储层中的滞留。杭锦旗区块现场应用结果表明，修复剂应用井返排液胍胶浓度显著增大，产量和稳产效果明显提升。研究成果为砂岩储层的高效开发提供了一定的技术支持。Abstract: In sandstone reservoir hydraulic fracturing operation, the adsorption and retention of hydroxypropyl guar gum (HPG) on the surfaces of reservoir rocks cause significant formation damage which requires an urgent solution. It is decided, based on laboratory study, that a repair agent should be used to mitigate the formation damage by HPG and hence to improve the effect of sandstone reservoir fracturing. Using spectroscopy technology, the quantity of HPG adsorbed and retained in sandstones can be quantitatively studied, and using NMR technology, the effect of the repair agent on reducing formation damage by HPG can be characterized. Based on these studies, the optimum quantity of the repair agent to be used was determined, and the effects of temperature and retention period on the performance of the repair agent were investigated. Using X-ray photoelectron spectroscopy, SEM and contact angle measurement, the mechanisms of the repair agent to mitigate formation damage by HPG were revealed. The results of the study show that the optimum concentration of the repair agent is 3000 mg/L, and the formation permeability damage is reduced by 29.31%. Temperature has a relatively low effect on the performance of the repair agent. The effect of the repair agent on reducing formation damage first decreases and then increases with the time of HPG retention on the surfaces of the sandstones. Through hydrogen-bond inhibition, preferentially occupying adsorption sites and increasing interface contact angles, the repair agent mitigates the retention of HPG in sandstone reservoirs. The field application of the repair agent in Hangjinqi block showed that the concentrations of the guar gum in the waste fracturing fluids from wells treated with the repair agent were significantly increased, and the oil production was significantly increased and stabilized for a longer time. The results of the study provide technical support to the efficient development of sandstone reservoirs.
-
Key words:
- Sandstone /
- Hydraulic fracturing /
- HPG /
- Formation damage by adsorption /
- NMR
-
表 1 全波段岩石XPS扫描结果
样品名称 元素含量 /% C1s O1s Si2s2p N1s Na1s 砂岩 8.65 61.86 29.49 砂岩+HPG 12.48 64.42 21.24 1.86 砂岩+HPG+修复剂 9.52 58.95 26.38 4.13 1.02 
下载: 导出CSV
表 2 C1s和O1s波段XPS扫描结果
样品名称 Cls谱峰/eV Ols谱峰/eV 键型 键型 C—H/C—C C—O C=OR/C=O O—C=O/O—C O—C=O/C=O 砂岩 285.2 285.8 288.6 531.4 533.0 砂岩+HPG 285.2 286.1 288.0 531.1 532.5 砂岩+HPG+修复剂 285.2 286.1 288.5 531.2 532.8
下载: 导出CSV
表 3 不同浓度修复剂溶液的接触角
修复剂浓度/（mg/L） 接触角/(°) 0 35.4 1000 53.6 2000 69.4 3000 79.8 4000 86.4 5000 91.1
下载: 导出CSV
表 4 修复剂应用井与邻井生产数据
井号 压降速率/
MPa·d−1单位压降累产/
104 m3·MPa−190 d 120 d 90 d 120 d J1（应用井） 0.0178 0.0126 99.70 118.8 J2（对比井） 0.0596 0.0448 22.05 37.5
下载: 导出CSV
-
[1] 贾爱林, 位云生, 郭智, 等. 中国致密砂岩气开发现状与前景展望[J]. 天然气工业, 2022, 42(1): 83-92.JIA Ailin, WEI Yunsheng, GUO Zhi, et al. Development status and prospect of tight sandstone gas in China[J]. Natural Gas Industry, 2022, 42(1): 83-92. [2] LI J C, LEI Z D, TANG H Y, et al. Efficient evaluation of gas recovery enhancement by hydraulic fracturing in unconventional reservoirs[J]. Journal of Natural Gas Science and Engineering, 2016, 35, Part A: 873-881. [3] 何春明, 才博, 卢拥军, 等. 瓜胶压裂液携砂微观机理研究[J]. 油田化学, 2015, 32(1): 34-38.HE Chunming, CAI Bo, LU Yongjun, et al. Microscopic mechanism of proppant carrying capacity of fracturing fluid[J]. Oilfield Chemistry, 2015, 32(1): 34-38. [4] BERLANGIERI C, POGGI G, MURGIA S, et al. Structural, rheological and dynamics insights of hydroxypropyl guar gel-like systems[J]. Colloids and Surfaces B: Biointerfaces, 2018, 168: 178-186. doi: 10.1016/j.colsurfb.2018.02.025 [5] SHI P, WANG S B, WANG Z, et al. LNMR analysis of the retention of different guar gum structure in sandstone: based on a new characterization method[J]. Geoenergy Science and Engineering, 2024, 243: 213113. doi: 10.1016/j.geoen.2024.213113 [6] YIN Z C, WANG Y L, WANG K, et al. The adsorption behavior of hydroxypropyl guar gum onto quartz sand[J]. Journal of Molecular Liquids, 2018, 258: 10-17. doi: 10.1016/j.molliq.2018.02.105 [7] XU Z C, LI Z P, WANG C. Experimental study on microscopic formation damage of low permeability reservoir caused by HPG fracturing fluid[J]. Journal of Natural Gas Science and Engineering, 2016, 36: 486-495. doi: 10.1016/j.jngse.2016.10.063 [8] WU X H, PU H, ZHU K A, et al. Formation damage mechanisms and protection technology for Nanpu nearshore tight gas reservoir[J]. Journal of Petroleum Science and Engineering, 2017, 158: 509-515. doi: 10.1016/j.petrol.2017.07.033 [9] GUO T K, GONG F C, LIN Q, et al. Experimental investigation on damage mechanism of guar gum fracturing fluid to low-permeability reservoir based on nuclear magnetic resonance[J]. Journal of Energy Resources Technology, 2018, 140(7): 072906. doi: 10.1115/1.4039324 [10] 马应娴, 马乐瑶, 郭建春, 等. 低吸附耐高矿化度滑溜水体系研制与现场应用[J]. 油田化学, 2020, 37(4): 616-622.MA Yingxian, MA Leyao, GUO Jianchun, et al. Preparation and field application of slickwater system with high salt tolerance and low adsorption[J]. Oilfield Chemistry, 2020, 37(4): 616-622. [11] ZHANG L F, ZHOU F J, ZHANG S C, et al. Evaluation of permeability damage caused by drilling and fracturing fluids in tight low permeability sandstone reservoirs[J]. Journal of Petroleum Science and Engineering, 2019, 175: 1122-1135. doi: 10.1016/j.petrol.2019.01.031 [12] 李杨. 羟丙基瓜尔胶对砂岩多孔介质吸附滞留伤害与解除研究[D]. 成都: 西南石油大学, 2019.LI Yang. Adsorption and retention damage and control measures of hydroxypropyl guar gum fracturing fluid to porous medium of sandstone[D]. Chengdu: Southwest Petroleum University, 2019. [13] 李爱芬, 任晓霞, 王桂娟, 等. 核磁共振研究致密砂岩孔隙结构的方法及应用[J]. 中国石油大学学报(自然科学版), 2015, 39(6): 92-98. doi: 10.3969/j.issn.1673-5005.2015.06.012LI Aifen, REN Xiaoxia, WANG Guijuan, et al. Characterization of pore structure of low permeability reservoirs using a nuclear magnetic resonance method[J]. Journal of China University of Petroleum (Edition of Natural Science), 2015, 39(6): 92-98. doi: 10.3969/j.issn.1673-5005.2015.06.012 [14] 翟成, 孙勇, 范宜仁, 等. 低场核磁共振技术在煤孔隙结构精准表征中的应用与展望[J]. 煤炭学报, 2022, 47(2): 828-848. doi: 10.13225/j.cnki.jccs.XR21.1766ZHAI Cheng, SUN Yong, FAN Yiren, et al. Application and prospect of low-field nuclear magnetic resonance technology in accurate characterization of coal pore structure[J]. Journal of China Coal Society, 2022, 47(2): 828-848. doi: 10.13225/j.cnki.jccs.XR21.1766 [15] 王琨, 周航宇, 赖杰, 等. 核磁共振技术在岩石物理与孔隙结构表征中的应用[J]. 仪器仪表学报, 2020, 41(2): 101-114. doi: 10.19650/j.cnki.cjsi.J1905872WANG Kun, ZHOU Hangyu, LAI Jie, et al. Application of NMR technology in characterization of petrophysics and pore structure[J]. Chinese Journal of Scientific Instrument, 2020, 41(2): 101-114. doi: 10.19650/j.cnki.cjsi.J1905872 [16] 陈鸿林. 低渗透油藏多段压裂开发优化研究[D]. 青岛: 中国石油大学(华东), 2018.CHEN Honglin. The optimization research of multiple-fracturing wellsdevelopment in low permeability reservoir[D]. Qingdao: China University of Petroleum, 2018. -
点击查看大图
图(9) / 表(4)
计量
- 文章访问数: 10
- HTML全文浏览量: 5
- PDF下载量: 3
- 被引次数: 0
