一种适用于高温高盐油藏的柔性堵剂.PDF

　　　　　　 230 2007 4 　　　　　　　　PET RO EUM EXP ORATION AND DEVE OPMENT 　　　　　　　Vol. 34　No. 2　 :1000-0747(2007)02-023-0 04 朱怀江, 王平美, 刘强, 熊春明, 刘玉章, 罗健辉, 杨静波 (中国石油勘探开发研究院) :国家重点基础研究发展“973”计划“化学驱和微生物驱提高石油采收率的基础研究”(2005CB221300) :现 的聚合物类或纤维性预交联体膨颗粒堵剂以及聚合物凝胶堵剂在高矿化度下耐温性能差, 不适用于温度高于 120℃的高盐油藏的堵水作业。为了改善高温高盐油藏的堵水技术, 研制了 一种耐高温高盐的柔性堵剂。该堵剂是不溶 于水、微溶于油、可任意变形、拉伸韧性强的颗粒, 其粒径范围为1～8mm。该柔性堵剂在高温高盐条件下的化学稳定性 好, 可二次黏结形成完整的封堵层。在塔河油田油藏条件下, 柔性堵剂用量从0. 03PV 增至0.2PV, 封堵效果出现突跃式 升高, 可对油藏的裂缝和高渗通道形成强封堵。在堵水作业中这种堵剂如果造成油井误堵, 使用甲苯就极易解堵, 是一种 既可在高温高盐下形成稳定封堵又可安全使用的堵剂。 图7 表1 参10 :堵水调剖; 合物;柔性堵剂;高温高盐油藏;黏弹性;提高采收率 :TE358. 3　　　:A A kind of flexible water shutoff agent applicable to reservoirs with high temperature and salinity ZHU Hua-i jiang, WANG Ping-mei, iu Qiang, XIONG Chun-ming, IU Yu-zhang, UO Jian-hui, YANG Jing-bo R esearch I ns titute of P etroleum E xp loration D evelop m en t, P etroChina, B eij ing 100083, Ch ina ( ) Abstract:Sw ellable gel particles of pr-e crosslinking polymer/fiber and polyacrylamide gel cannot be used as w ater shutoff agents in the reservoir of high tem perature (120℃)and salinity for their bad thermal stability in brines of high salinity. A flexible w ater shutoff agent (S R-D1)applicable to those reservoirs is developed. The agent is particles with a size range from 1 mm to 8mm, and does not dissolve in w ater, but is slightly soluble in oil, and w ith a high elastic deformation capability. Its chemical stability is high under the high temperature and salinity conditions, and it could form integrated plugged zones by means of secondary bond. Under the reservoir condition of Tahe Oilfield, the plugging efficiency increases drastically w ith