冷41块化学封堵底水技术

CHEMICAL PLUGGING BOTTOM WATER TECHNOLOGY OF LENG41 BLOCK

郭志华 徐俊枫 齐海鹰 李建召

Guo Zhihua Xu Junfeng Qi Haiying Li Jianzhao

辽河油田公司钻采工艺研究院, 辽宁盘锦 124010 华北石化公司, 河北任丘 062552 华北油田公司采油工艺研究院, 河北任丘 062552

辽河油田稠油蒸汽驱冷41块油藏边底水锥进造成油井高含水。分析了该块边底水活动规律,根据油藏地质特点,研制出一种高温调剖和水玻璃/黏土/酚醛树脂高强度复合堵剂。该堵剂主要由聚丙烯酰胺、有机交联剂、耐高温油溶性树脂、橡胶粉、榆树皮粉、无机增强剂及热稳定剂组成,封堵强度高,耐温性好。现场试验了13井次,增油降水效果明显,平均降水10个百分点以上,解决了底水对该区块的危害问题,达到稳油控水的目的。

High water cut cause by edge-bottom water drive of heavy oil steam-flood reservoir at Leng41 block of LiaoHe oilfield. Analyzed its activity rules of edge-bottom water, combined geological characters of this reservoir, a new combination plugging agent and fluid gelling profile control agent of sodium silicate/clay/phenolic resin were developed, which can endure high temperature and high strength and composed of polyacrylamide, organic crosslinker, resist high temperature oil soluble resin, rubber, elm, abio-reinforcing agent and thermal stabilizer, with favorable plugging and temperature tolerance. Experiment in 13 wells indicate that it can efficiently decrease the damage caused edge-bottom water, and reached the purpose of stable production and water control.

10.3969/j.issn.1000-7393.2005.03.020