钻井液与完井液2016，Vol.33Issue(6)：17-22,6.DOI:10.3696/j.issn.1001-5620.2016.06.003
抗高温强封堵防塌钻井液体系研究与应用
Study and Application of a High Temperature Drilling Fluid with Strong Plugging Capacity
摘要
Abstract
A high temperature borehole wall stabilizing agent SMNA-1 was developed to resolve problems encountered in high temperature deep well drilling.SMNA-1 functions at high temperature to above 200 ℃.It has a rigid molecular structure and is deformable at high temperature.SMNA-1 is able to enhance the strength of mud cake through its deformability and cohesion capacity.SMNA-1,through its hydrophobicity,also forms a sealing membrane on the surface of mud cake to bind free water and enhance the toughness and consistence of the mud cake,thereby reducing HTHP filter loss and enhancing the capacity of drilling fluid to plugging and stabilizing borehole wall.A high temperature polymer filter loss reducer,SMPFL-L,was synthesized with acrylamide,2-acrylamide long carbon chain sulfonic acid and diene sulfonic acid through free radical polymerization.SMPFL-L has low widely distributed molecular weight.A saturated saltwater drilling fluid treated with 2％SMPFL-L had its HTHP filter loss reduced to 54 mL.The property of SMPFL-L remained stable at 210 ℃,and had good deflocculating ability.SML-4,a high temperature salt-resistant filter loss reducer,has been developed for use in high density muds weighted with weighting materials that will result in high solids content.SML-4 is able to alter the surface behavior,enhance the dispersity,and thin the hydration film of weighting material.A high density saltwater drilling fluid treated with 4％ SML-4 had its API filter loss reduced from 164 mL to 5.8 mL,without increasing the viscosity of the drilling fluid.A drilling fluid of 2.0 g/cm3 treated with 2％ SMJH-1 had its extreme pressure friction coefficient reduced by 24％.A high temperature drilling fluid with strong plugging capacity has been developed with SMNA-1 as the main additive,SMPFL-L and SML-4 as filter loss reduces,SMJH-1 as high efficiency lubricant.This drilling fluid formulation was successfully used in drilling the third interval (1,300 m) of the well Shunbei-1-1H located in Xinjiang,and no downhole troubles were encountered.The average percent hole enlargement was only 6.88％,and good application results were achieved.关键词
抗高温钻井液/防塌/封堵/井壁稳定/降滤失剂Key words
High temperature drilling fluid/Borehole collapse prevention/Plugging/Borehole stabilization/Filter loss reducer分类
能源科技引用本文复制引用
孔勇,杨小华,徐江,刘贵传,张国,金军斌,李雄..抗高温强封堵防塌钻井液体系研究与应用[J].钻井液与完井液,2016,33(6):17-22,6.基金项目
中石化科技攻关项目“顺南深部复杂地层钻井液技术研究”(P14114)、“环境响应铝基处理剂前瞻研究”(P15105). （P14114）
