【摘要】：前期研發(fā)的聚苯乙烯中空微珠作為鉆井液減輕劑在現(xiàn)場應(yīng)用中易團(tuán)聚,極易與鉆屑吸附而被固控設(shè)備除去,導(dǎo)致鉆井液密度逐漸升高。為解決聚苯乙烯中空微珠存在的吸附、團(tuán)聚問題,從殼體本體性質(zhì)、表面改性入手,優(yōu)化設(shè)計出具有雙層結(jié)構(gòu)的高分子中空微珠,室內(nèi)優(yōu)化WF單體、催化劑、發(fā)泡劑、表面改性劑、防靜電劑等關(guān)鍵材料的加量,并采用噴霧干燥裝置制備出了SMHPS-2型高分子中空微珠。室內(nèi)研究表明,制備出的高分子中空微珠微觀形貌呈圓球顆粒,表面致密光滑,粒徑均小于100μm,平均密度為0.31~0.32 g/cm~3,抗壓達(dá)50 MPa,抗溫達(dá)90℃,具有良好的抗研磨性、分散穩(wěn)定性,自身不團(tuán)聚,且與鉆屑無吸附效應(yīng)。錦111井的現(xiàn)場試驗表明,基液中加入4%SMHPS-2型高分子中空微珠減輕劑可將密度降低0.04 g/cm~3,且與固控設(shè)備具有良好的適應(yīng)性,無吸附、團(tuán)聚現(xiàn)象,具有良好的抗剪切能力。
[Abstract]:The polystyrene hollow beads developed earlier are easy to be agglomerated in the field application and easily adsorbed with drilling debris and removed by solid control equipment, which leads to a gradual increase in drilling fluid density. In order to solve the problem of adsorption and agglomeration of polystyrene hollow beads, the macromolecule hollow beads with bilayer structure were optimized from the properties of shell body and surface modification, and the WF monomer, catalyst and blowing agent were optimized in the laboratory. The surface modifier, antistatic agent and other key materials were added, and SMHPS- 2 polymer hollow beads were prepared by spray drying device. The results show that the micro-morphology of the hollow polymer beads is spherical particles, the surface is compact and smooth, the particle size is less than 100 渭 m, the average density is 0.31 ~ 0.32 g / cm ~ (3), the compressive pressure reaches 50 MPa, and the temperature resistance reaches 90 鈩，

本文編號：2470045