钻井液与完井液2016，Vol.33Issue(6)：40-44,5.DOI:10.3696/j.issn.1001-5620.2016.06.007
油基钻井液凝胶堵漏技术实验探讨
Experimental Study on Oil Base Mud Loss Control with Gel LCM
摘要
Abstract
Loss of oil base mud downhole is difficult to stop in field operation and causes great economic loss.An oil base mud loss control method is presented to efficiently control oil base mud loss.This method uses gel lost circulation material (LCM) to control oil base mud loss.In selecting additives for gel LCM,a gelling agent NJZ was found to have good solubility in diesel oil and had good gelling capacity.NJZ reacted very well with a crosslinking agent JLJ to form high quality gels.It did not form good gel with the crosslinking agent AlCl3 · 6H2O and NaOH.Highest gel strength was obtained by reacting a 10.0％ NJZ solution with 4.0％ crosslinking agent solution under the action of an emulsifier EHJ.The formulation of the gel LCM was optimized by orthogonal experiment,and the effects of temperature,pH and shearing on gel strength were analyzed.Laboratory experiment has shown that the gel LCM can be used the way cement LCM is used,and can be squeezed in multiple times.Compared with water base gel LCM,this oil base gel LCM worked better in stopping mud loss and has good high temperature stability;it had high gel strength even at 120 ℃,and was able to tolerate a pressure gradient of 1.05 MPa/m.关键词
井下漏失/油基钻井液/凝胶堵漏体系/承压能力/钻井工程Key words
Downhole mud loss/Oil base drilling fluid/Gel LCM/Pressure bearing capacity/Drilling engineering分类
能源科技引用本文复制引用
王灿,孙晓杰,邱正松,刘均一,黄达全,张现斌,暴丹..油基钻井液凝胶堵漏技术实验探讨[J].钻井液与完井液,2016,33(6):40-44,5.基金项目
国家自然科学基金项目“海洋深水浅层井壁稳定与水合物抑制的机理和新方法”(51474236) （51474236）
石油化工联合基金“高温高密度高矿化度钻井液流变性的调控机理及新方法”(U1562101) （U1562101）
中石油渤海钻探工程公司技术开发项目“油基钻井液防漏堵漏及页岩气井壁稳定技术研究”(BHZT-NJFGS-2014-JS-77). （BHZT-NJFGS-2014-JS-77）
