摘要
报道了针对易发生蒸汽窜、后期出砂严重的孤东稠油油藏蒸汽吞井研制的一种蒸汽转向剂。该剂基料为表面经10%金属氧化物、5%有机硅改性的G级油井水泥,增渗剂为质量比8:0.05:1:1.5的石油树脂+铝粉+苯甲酸+直径0.1~0.3mm、长5~10mm的植物秸杆纤维,用量为基料的60%,用清水配浆,最佳工艺条件如下:水灰比0.6,固化温度60℃,固化时间72小时。固结体油相(煤油)渗透率为0.01219μm2,抗压强度6.43MPa,经300℃高温蒸汽和60℃煤油处理后渗透率>1.0μm2,抗压强度5MPa。注入并联填砂管并固化后,高、低渗填砂管的吸汽能力之比由2.4:1变为1:1.9。在两口蒸汽吞吐井使用该蒸汽转向剂,注入量分别为8和10m3,效果良好。
The steam diversion agent(SDA) presented was developed for use in steam huff-puff heavy oil wells in Gudong with steam breakthrough occured in pay layers and sanding problems encountered in the later stage of a production cycle. The basic material of the SDA was a grade G oilwell cement,the surfaces of which were modified by 10% metal oxides and 5 % silicone;a mixture of petroleum resin + powdered Al + benzoic acid + plant fiber 0. 1---4). 3 mm in diameter and 5--10 mm long in mass ratios of 8: 0. 05:1 : 1.5 was taken as permeability enhancing agent at dosage 60% of mass of the basic material. The working fluid was prepared in fresh water. The optimized parameters were: water to modified cement ratio 0. 6; curing temperature 60℃; and curing time 72 hrs. The cured compounded modified cement had permeability to oil phase, kersene,0. 01219 μm^2 and compression strength 6.43 MPa and the two characteristics changed to 〉 1.0/μm^2 and - 5 MPa after treating by steam at 300℃ and kerosene at 60℃. For a set of sand packed tubes in paralell treated by this SDA ,the proportion of steam intake of high and low permeability sand packed tubes was dropped from 2. 4:1 to 1: I. 9. This SDA was successfully used in two steam huff-puff wells with 8 and 10 m^3 of working fluid injected per well.
出处
《油田化学》
CAS
CSCD
北大核心
2009年第2期124-127,共4页
Oilfield Chemistry
基金
胜利油田局级科研项目"稠油热采井防砂与蒸汽转向技术研究"(项目编号SLGU20060305009)
关键词
蒸汽转向剂
油井水泥浆
表面改性水泥
增渗剂
组成与配方
深部调剖
防砂
蒸汽吞吐井
胜利孤东油田
steam diverting agent
oilwell cement slurry
surface modified cement
permeability enhancing agent
composition/formulation
indepth profile modification
sand control
steam huff-puff wells
Gudong oil field in Shengli