压裂液用高温延缓交联剂CL-9的研制  

High Temperature Delayed Crosslinker Composition CL-9 for Water Base Hydrofracturing Gelling Fluid

作　　者：张高群[1] 王琴[1] 孙良田[1] 李建勋[1] 杨超[1] 于春虎[1] 

机构地区：[1]中国石化中原油田井下工艺技术研发中心,河南濮阳457164

出　　处：《油田化学》2008年第4期325-327,351,共4页Oilfield Chemistry

摘　　要：所报道的压裂液用有机硼交联剂CL-9，由硼酸盐、多羟基醛、LB-2多元醇及碱反应制得，外观均一，长时间存放不析出固体物，适用温度90～145℃，使用量0．40％～0．50％。报道了含2．0％Ka、0．08％～0．15％NaOH、0．10％破乳助排剂的CL-9（0．45％）／HPG（0．50％）压裂液的性能。交联时间随pH升高（7～14）而延长，随温度升高（20～70℃）而缩短，pH=14时常温交联时间为5．2min，60℃时为1min。高温下（110～130℃）在170 1／s剪切10min后压裂液黏度基本上保持稳定，高温下（100～130℃）经500 1／s剪切10min后，170 1／s黏度均大于210mPa·s，其保持率随温度升高而下降，100℃下为82．3％，130℃下为66．0％。压裂液滤失性能良好，滤失系数和初滤失量在90℃为5．35×10—0m／minl／2和0，120℃下为7．32×10—0m／min^1／2和1．21×10^-4 cm3／cm2。该压裂液已在中原油田7口井压裂中使用，施工成功率100％，油井压裂后增产效果较好。图4表2参3。A bororganic crosslinker, CL-9, for water base hydrofracturing gelling fluid（HFGF） is prepared by reaction of borate, polyhydroxyl aldehyde, polyol LB-2, and alkaline. CL-9 keeps homogeneous appearance at long time storage without any precipita- tion. Its suitable use temperature is in range 90-145℃ and uselevel 0.40%--0.50%. The performance properties of anexper- imental 0.45 % CL-9/0.50 % HPG HFGF with 2.0 % KCl, 0.08 %--0.15 % NaOH and 0.10 % demulsifier/backflow aid added are presented. The crosslinking time of the HFGF is prolonged with increasing pH value from 7 to 14 and shortened with increasing temperature from 200C to 70℃ ,being of 5.2 rnin at the ambient temperature and of 1 min at 60℃ when pH= 14. At higher temperatures up to 130℃, the app viscosity of the HFGF, having been sheared at 170 1/s for 10 min, is kept approximately steady and exceeds 210 mPa＇s with the viscosity retention decreased with increasing temperature, 82.3% at 100℃ and 66.0% at 130℃, after shearing at 500 1/s over 10 min. This HFGF posseses good filtration behavior, having filtration coefficient 5.35 × 10^-4 m/min^1/2 and 7.32× 10^-4 m/min^1/2, and filtrate loss 0 and 1.21 × 10^-4 cm^3/cm^2 at 900C and 120℃, respectively. This HFGF has been put into use in hydrofracmring jobs in 7 production wells at Zhongyuan oilfield with 100% successfulness, which give satisfactory results of reservoir stimulation.

关 键 词：有机硼交联剂 水基冻胶压裂液 羟丙基瓜尔胶/硼交联体系 延缓(延迟)交联 应用性能 高温油藏 中原油田 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程] O627.31[理学—有机化学]