环保堵剂 BHW-101性能评价与应用

Performance Evaluation and Application of Environmental Plugging Agent BHW-101

吴清辉 陈维余 张艳辉 魏子扬 谢诗章

WU Qinghui， CHEN Weiyu，ZHANG Yanhui，WEI Ziyang，XIE Shizhang

为降低聚合物凝胶类堵剂的毒性， 以 0.15%～0.30%多羟基烷为主剂、 0.15%数 0.40%乌洛托品为助剂， 与0.15%～ 0.5%聚合物反应制得有机堵剂 BHW-101。研究了 pH值和矿化度对 BHW-101成胶效果的影响， 考察了BHW-101的稳定性、 封堵性、 动态成胶性及毒性， 并在渤海油田进行了现场应用。结果表明， BHW-101在 pH为 5～ 8时均可成胶， 矿化度对体系成胶强度和封堵性能的影响较小； BHW-101的长期稳定性良好， 85℃下储存90 d后的黏度降幅小于 15%； BHW-101封堵性能良好， 对单管填砂管的封堵率约为 94%， 可选择性封堵高渗透层； BHW-101在震荡条件下亦可成胶， 但成胶时间延长； BHW-101无毒环保， 可替代目前大量使用的重金属铬离子、 苯酚/醛类高毒性交联剂； 在渤海油田 A31井使用 BHW-101堵水， 增油降水效果明显， 适用于高含水或特高含水期油井堵水或水井调剖作业。图 2表 6参 11

In order to reduce the toxicity of polymer gel plugging agent，organic plugging agent BHW-101 was prepared by 0.15%—0.30% main agent hydroxy alkane，0.15%—0.40% additive methenamine and 0.15%—0.5% polymer. The gelling effect of pH value and salinity on BHW-101 was studied. The stability，sealing，dynamic gelation and toxicity of BHW-101 were also investigated. Finally，BHW-101 was applied in Bohai oilfield. The results showed that BHW-101 could form gel at pH value of 5—8，and the effect of salinity on gelling strength and sealing performance of BHW-101 was less. The long-term stability of BHW-101 was nice，whose viscosity decreased by less than 15% after storing for 90 d at 85℃. The stemming ratio of BHW-101 to single sand filling tube was about 94% which showing good sealing performance，and BHW-101 could selectively plug high permeability layer.BHW-101 could also form gell under shock condition，but the gelling time prolonged. BHW-101 was non-toxic and environmental friendly which could replace current crosslinking agent，such as heavy metal chromium ion and high toxic phenol or aldehyde. After BHW-101 was used in A31 well of Bohai oilfield，the effect of increasing oil and decreasing water was obvious，which was suitable for water shut off or well profile control operation in high water cut or extra high water cut stage.

10.19346./j.cnki.1000-4092.2017.04.011