Development and Application of a Temperature Enhanced Highly Elastic Liquid Gel Temporary Plugging Agent
-
摘要: 针对低压气井压井漏失难题,本文基于对有机交联凝胶结构上的认识,使用聚乙烯亚胺(PEI)作为交联剂制备了一种弹性液体胶塞EGL-1,能显著提高地层承压能力并阻断压井液漏失,降低储层损害。该体系基本配方为:2%抗高温聚合物SPAM+(1%~1.6%)交联剂PEI+0.02%稳定剂+清水,并对其地面流变性能、黏弹性能、破胶性能和堵漏性能进行了测试与评价。胶塞初始溶液流变测试结果表明,剪切速率为200 s-1时的表观黏度稳定在350 mPa · s内,具有较好泵送能力;交联成胶后的胶塞黏弹测试表明,弹性模量在100 Pa~470 Pa之间,黏性模量在10 Pa~60 Pa之间,温度越高,胶塞强度越高。物理模拟实验结果表明,胶塞在裂缝岩心抗压达9 MPa以上,返排突破压力小于1 MPa,岩心渗透率恢复值达90%,可实现自然解堵。该技术在长庆下古碳酸盐岩低压气井暂堵压井进行了成功试验,对类似低压气藏防漏失压井具有一定借鉴作用。Abstract: To address mud loss problems in low pressure gas wells, an elastic liquid gel plug EGL-1 has been developed using polyethyleneimine (PEI) as crosslinking agent. EGL-1 is able to remarkably enhance the pressure bearing capacity of formations and completely stop loss of fracturing fluids to minimize formation damage. The basic composition of EGL-1 is:2% SPAM (a high temperature polymer)+(1%-1.6%)PEI+0.02% stabilizer+water. Test and evaluation of EGL-1 showed that the new EGL-1 solution, after being seared at 200 s-1, had apparent viscosity of less than 350 mPa·s, indicating that EGL-1 has good pumpability. Test on the crosslinked EGL-1 showed that it had elastic modulus between 100 Pa and 470 Pa, and viscous modulus between 10 Pa and 60 Pa. The strength of the gel plug increases with temperature. Physical simulation experiment results showed that the compressive strength of the gel plug in fractured cores was at least 9 MPa, and the breakthrough pressure of flowback test was less than 1 MPa. The permeability recovery of the cores tested with the gel plug was 90% and pore plugging caused by the gel plug can be removed naturally. This gel plug has been successfully used in killing a low-pressure gas well penetrating paleo-carbonate formation. The successful application of EGL-1 can be used to kill similar low pressure gas wells with potential of fluid losses.
-
[1] 刘音,常青,谭锐,等. 水平井控水用液体胶塞的室内合成研究[J]. 石油化工应用,2015,34(8):97-100.LIU Yin, CHANG Qing, TAN Rui, et al.Study on indoor synthesis of liquid colloid plug for horizontal controlling water[J].Petrochemical Industry Application,2015,34(8):97-100. [2] 舒勇,熊春明,张建军,等.XJPS无固相弱凝胶修井液的研究及其在低渗裂缝发育储层的应用[J]. 石油与天然气化工,2011,40(4):370-374.SHU Yong, XIONG Chunming,ZHANG Jianjun,et al. Research of solids free weak gel workover fluid XJPS and its application in low permeability fracture growth reservoir[J].Chemical Engineering of Oil & Gas,2011, 40(4):370-374. [3] 秦风鸣. 聚合物凝胶暂堵剂堵漏技术在X1093井的应用[J]. 中国新技术新产品,2013(20):70-70. QIN Fengming.Application of plugging technology with polymer gel temporary plugging agent in X1093well[J]. China New Technologies and Products,2013(20):70-70. [4] ZIAD A B,GROMAKOVSKII D,AL-SAGR A,et al. First successful application of temporary gel plug replacing calcium carbonate chips to isolate depleted reservoir, case study from Saudi Arabia gas field[C]. SPE 178986-MS,2016. [5] 张锋,张洪杰,陈晓明,等. 暂堵型聚合物凝胶压井液研制与应用[J]. 甘肃科技,2017,33(14):68-71.ZHANG Feng,ZHANG Hongjie,CHEN Xiaoming,et al. Development and application of temporary plugging polymer gel workover fluid[J].Gansu Science and Technology,2017,33(14):68-71. [6] 贾虎,陈昊,陈波. 弹性液体胶塞修井防漏机理及应用[J]. 石油学报,2018(3):349-356. JIA Hu,CHEN Hao,CHEN Bo. Fluid-loss control mechanism and application of elastic gel plug in well workover[J].Acta Petrolei Sinica,2018(3):349-356. [7] JIA H,CHEN H,GUO S. Fluid loss control mechanism of using polymer gel pill based on multi-crosslinking during overbalanced well workover and completion[J]. Fuel,2017:207-216. [8] 左文贵,朱林,吴兵良,等. 聚合物凝胶堵漏剂在大裂隙溶洞地层中的研究及应用[J]. 探矿工程(岩土钻掘工程),2018,45(9):9-24. ZUO Wengui,ZHU Lin,WU Bingliang,et al. Polymer gel plugging agent used in formation with large size caverns and fractures[J]. Exploration Engineering (Rock & Soil Drilling and Tunneling),2018,45(9):9-24. [9] AMIR Z,SAID I M,JAN B M. In situ organically cross-linked polymer gel for high-temperature reservoir conformance control:A review[J].Polymers for Advanced Technologies,2018. [10] FANG J,WANG J,WEN Q,et al. Research of phenolic crosslinker gel for profile control and oil displacement in high temperature and high salinity reservoirs[J].Journal of Applied Polymer Science,2018, 135(14):46075. [11] AMIR Z,SAID I M,JAN B M. In situ organically cross linked polymer gel for high temperature reservoir conformance control:A review[J].Polymers for Advanced Technologies,2019,30(1):13-39. [12] 吴运强,毕岩滨,纪萍,等. 适用于高温高矿化度条件的聚乙烯亚胺冻胶堵水剂[J]. 石油钻采工艺,2015, 37(4):113-116.WU Yunqiang,BI Yanbin,JI Ping,et al. Water shutoff agent of PEI gel applicable to high temperature and high salinity reservoirs[J].Oil Drilling & Production Technology,2015,37(4):113-116. [13] 刘锦霞,赵梦云,赵青. 高温下PAM/PEI体系延缓成胶技术研究[J]. 油田化学,2010(3):279-283. LIU Jinxia,ZHAO Mengyun,ZHAO Qing. Delayed gelation of polyacrylamide/modified polyethyleneimine aqueous system at high temperatures[J].Oilfield Chemistry,2010(3):279-283. [14] AL-MUNTASHERI G A, HUSSEIN I A, NASREL-DIN H A, et al, A rheological investigation of a high temperature organic gel used for water shutoff treatments[J].Journal of Petroleum Science and Engineering,2007,59(1-2):73-83. [15] JIA H,PU WF,ZHAO JZ,et al. Research on the gelation performance of low toxic PEI cross-linking PHPAM gel systems as water shutoff agents in low temperature reservoirs[J].Industrial & Engineering Chemistry Research,2010,49(20):9618-9624. [16] AL-MUNTASHERI G A,HUSSEIN I A,NASREL-DIN H A,et al. Viscoelastic properties of a high temperature cross-linked water shut-off polymeric gel[J]. Journal of Petroleum Science and Engineering,2007, 55(1-2):56-66. [17] 何仲,刘金华,方静,等. 超高温屏蔽暂堵剂SMHHP的室内实验研究[J]. 钻井液与完井液,2017,34(6):18-23.HE Zhong, LIU Jinhua, FANG Jing, et al.Laboratory study on ultra-high temperature temporary plugging agent SMHHP[J].Drilling Fluid & Completion Fluid,2017, 34(6):18-23. [18] 姜伟,管保山,李阳,等. 新型水溶性暂堵剂在重复压裂中的暂堵转向效果[J]. 钻井液与完井液,2017, 34(6):100-104.JIANG Wei,GUAN Baoshan, LI Yang,et al.A new water soluble temporary plugging agent and its temporary plugging and diverting effects in re-fracturing[J].Drilling Fluid & Completion Fluid,2017,34(6):100-104.
点击查看大图
计量
- 文章访问数: 574
- HTML全文浏览量: 157
- PDF下载量: 134
- 被引次数: 0