摘要
合成了一种适用于油基钻井液用的提切剂,用以代替传统油基钻井液所使用的有机土,解决高密度有土相油基钻井液中存在的粘度大、流变性控制困难等问题。使用聚醚胺D-2000、癸二酸与多元醇进行反应,对合成产物进行红外光谱分析,产生了目的官能团酰胺基及酯基,利用分子中的极性基团及长链形成网格结构。将合成提切剂与有机土加入基础配方中进行对比,提切剂配制的无土相高密度油基钻井液体系具有更高的切力及初切,且不提升基础配方的塑性粘度。密度2.2 g/cm3条件下,对提切剂加量进行优选,最终确定提切剂的优选加量为1%,150℃条件下,钻井液表观粘度37 mPa·s、动切力10.5 Pa、破乳电压>700 V、静沉降系数SF=0.504、动沉降系数VSST=0.081 g/cm3,钻井液拥有良好的流变性及悬浮稳定性,电稳定性良好。
A rheology modifier suitable for oil-based drilling fluids is synthesized to replace the organic soil used in traditional oil-based drilling fluids,and solve the problem of high viscosity and rheological control in high-density soil-phase oil-based drilling fluids.Difficulties and other issues.Use polyetheramine D-2000,sebacic acid and polyol to react,perform infrared spectroscopy analysis on the synthesized product,and generate the target functional group amide group and ester group,and use the polar group and long chain in the molecule to form a grid structure.Comparing the synthetic rheology modifier and organic soil added to the basic formula,the soil-free high-density oil-based drilling fluid system formulated with the cut-lifting agent has higher shear and initial cut,and does not increase the plastic viscosity of the basic formula.Under the condition of a density of 2.2 g/cm,the addition amount of the rheology modifier is optimized,and the optimal addition amount of the rheology modifier is finally determined to be 1%.At 150℃,the plastic viscosity of the drilling fluid is 37 mPa·s,the dynamic shear force is 10.5 Pa,and the breaking emulsion voltage>700 V,static settlement coefficient SF=0.504,dynamic settlement coefficient VSST=0.081 g/cm,the drilling fluid has good rheology and suspension stability,and good electrical stability.
作者
李子钰
于培志
LI Zi-yu;YU Pei-zhi(College of Engineering and Technology,China University of Geosciences (Beijing),Beijing 100083,China)
出处
《应用化工》
CAS
CSCD
北大核心
2022年第5期1252-1255,共4页
Applied Chemical Industry
基金
国家自然科学基金项目(41772388)。
关键词
提切剂
无土相
高密度
油基钻井液
rheology modifier
organoclay-free
high density
oil-based drilling fluid
