井筒漏失治理用环氧树脂胶塞的制备与性能评价
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Preparation and Performance Evaluation of Epoxy Resin Plug for the Control of Wellbore Loss
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    摘要:

    随着油田生产到中后期,套管受到地层水腐蚀、投产射孔、修井作业以及固井质量等因素的影响而出现破 损,严重影响油气井的正常生产。针对浅层套漏常用的挤水泥堵漏技术存在含有固相、注入能力差、封堵强度低 的问题,以环氧树脂、稀释剂和固化剂为原料制备了双酚A型环氧树脂DGEBA,并对其性能进行了评价。结果 表明,在55 ℃下,以正丁基缩水甘油醚(BGE)为稀释剂制备的DGEBA注入性提高,芳香胺和聚酰胺复配的固化 剂可使DGEBA的固化时间在3~6 h内可调,固化体的抗压强度大于40 MPa,且老化360 d仍能保持90%的强 度,封堵压力超过30 MPa,满足胜利油田浅层套管堵漏要求。通过加入微硅粉可以降低环氧树脂固化体的收缩 率,提高环氧树脂体系的使用性能。

    Abstract:

    As the oilfield produces in the middle and late stages,the casing pipe is damaged by factors such as formation water corrosion,production perforation,workover operations and cementing quality,which seriously affects the normal production of oil and gas wells. In view of the problems of the commonly used squeezing cement plugging technology for shallow sleeve leakage, which contained solid phase,poor injection capacity and low plugging strength,the bisphenol A epoxy resin DGEBA was prepared by using epoxy resin,diluent and curing agent as raw materials. The performance evaluation results showed that the DGEBA prepared by using n- butyl glycidyl ether(BGE)as diluent at 55 ℃ improved the penetration. The curing agent compounded by aromatic amine and polyamide could adjust the curing time of DGEBA within 3—6 hours. The compressive strength of the cured body was greater than 40 MPa,and it could still maintain 90% strength after aging for 360 days. The plugging pressure could be blocked more than 30 MPa,which met the leakage plugging requirements for shallow casing pipe in Shengli oilfield. By adding micro silicon powder,the shrinkage of the cured epoxy resin could be reduced,and the performance of the epoxy resin system could be improved.

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  • 在线发布日期: 2021-07-06
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