糠醇低聚物复合固砂剂的研究与应用  

A Low Molecular Mass Furfuryl Alcohol Resin Compounded Fluid for Sand Consolidation and Its Uses

作　　者：延玉臻[1] 段友智[1] 高斌[1] 

机构地区：[1]中国石化胜利油田分公司采油工艺研究院,山东东营257000

出　　处：《油田化学》2004年第1期8-9,12,共3页Oilfield Chemistry

摘　　要：合成了有效物含量>95%的低分子量液体糠醇聚合物。在由100cm3粒径0.3～0.6mm的石英砂、2mL煤油、1mL油田污水、几滴异丙醇组成的固砂模型上,根据固结砂的抗压强度和渗透率筛选出了糠醇聚合物固砂剂各组分的用量:糠醇聚合物5g,固化剂对甲苯磺酸0.5g,稀释剂醋酸丁酯5g,后固化剂NaCl+HCl溶液100mL,预冲洗液(饱和NaCl溶液)80mL,后冲洗液(近饱和NaCl溶液)80mL。此配方固砂剂在40～60℃下48h形成的固结砂体,抗压强度为3.72～7.23MPa,在60℃下6h后固结砂体即可达到72h强度(7.28MPa)的70%。固结砂在12/3土酸和10%NaOH溶液中浸泡15天,强度基本不变。此固砂剂适用于中、低矿化度(<1.0×104mg/L)高含水油井的防砂。在胜利油田进行的井温50～60℃的20余井次防砂施工,成功率>95%,有效期平均10个月。表2参1。A low molecular mass liquid furfuryl alcohol resin (LFAR) of purity >95% is synthesized. On sand packs consisting of 100 cm^3 quartz of particle size 0.3—0.6 mm, 2 mL kerosene, 1 mL produced water and several drops of isopropyl alcohol, the formulation of LFAR sand consolidation fluid is studied on the basis of the experimental data of compression strength and permeability of the consolidated sand packs and established as follows: 5.0 g LFAR; 0.5 g paratoluene sulfonic acid as curing agent; 5.0 g butyl acetate as thinner; 100 mL aqueous NaCl+HCl solution as postcuring agent; 80 mL saturated NaCl solution as preflushing fluid; and 80 mL nearly saturated NaCl solution as postflushing fluid. The sand packs consolidated with the LFAR fluid at 40—60℃ in 48 hrs have compression strength of 3.72—7.23 MPa and at 60℃ in 6 hrs — of 70% of strength reached in 72 hrs (7.28 MPa). The strength of the consolidated sand packs keep practically unchanged after being immersed in (12/3) mud acid and in 10% NaOH solution over 15 days. This sand consolidation fluid can be used for sand control in high water cut oil wells of medium-low salinity (<1.0×10~4 mg/L) reservoirs. More than 20 sand controlling operations have been performed in oil wells of temperature 50—60℃ in Shengli oil fields with successfulness >95% and duration of effectiveness 10 months in average.

关 键 词：固砂剂 糠醇低聚物 石英砂 煤 抗压强度 渗透率 固化剂 

分 类 号：TE358.1[石油与天然气工程—油气田开发工程] TE39