适用于LAS系统的全液体隔离液体系  

An All-Liquid Spacer for LAS System

作　　者：王雪山[1] 邹亦玮 张福铭[1] 田野[1] WANG Xueshan;ZOU Yiwei;ZHANG Fuming;TIAN Ye(Oilfield Chemicals R&D Institute,COSL,Yanjiao,Hebei 065201)

机构地区：[1]中海油田服务股份有限公司油田化学研究院,河北燕郊065201

出　　处：《钻井液与完井液》2024年第4期489-495,共7页Drilling Fluid & Completion Fluid

基　　金：中海油田服务股份有限公司科技项目“海水基固井关键外加剂的开发与机理研究”(YHB23YF004)。

摘　　要：固井施工过程中,在注入水泥浆前,需要先泵入一定量的隔离液,在海洋固井现场施工作业过程中,隔离液配制一般需要繁重的人工劳作,劳动强度大,作业效率低,加量不准确。为解决上述问题,用液体添加剂代替固体添加剂,通过LAS材料添加系统将材料混配作业,从传统的重体力劳动转化为智能化操作,降低作业强度,提高固井作业效率与降低人员成本。通过反相乳液聚合制备了一种液体隔离剂C-S70L,以它为主剂,构建了一套适用于液体加料系统(LAS)的隔离液体系。该体系推荐使用温度为20~120℃,适用密度为1.30~1.70 g/cm^(3);具有良好的悬浮稳定性(热滚后无沉降)、流变可调、失水可控以及相容性好的特点。In well cementing operation,a certain amount of spacer needs to be pumped into the wellbore before injecting cement slurries.In offshore well cementing,the preparation of spacer requires heavy manual labor,and the labor intensity is quite high,resulting in low operation efficiency and poor control on the quantities of the spacer additives.To solve this problem,liquid additives are used to replace the solids additives in formulating the spacer,and the liquid additives are added through the additive addition system LAS.Using this technique,the traditional heavy physical labor in formulating a spacer is replaced with intelligent operation,the labor intensity is lowered,the efficiency of well cementing operation is increased,and the labor costs are reduced.A liquid spacer additive C-S70L is prepared through inverse emulsion polymerization.Using C-S70L as the core additive,a spacer suitable for injection using the LAS is formulated.This spacer can be used in temperature range of 20-120°C and density range of 1.30–1.70 g/cm^(3).It has good suspending stability(no settling after hot rolling),a rheology that is easy to adjust,a fluid loss that is controllable and good compatibility.

关 键 词：固井 相容性 沉降稳定性 隔离液 LAS系统 反向乳液聚合 

分 类 号：TE256.6[石油与天然气工程—油气井工程]