阴离子双子表活剂-纳米粒子构筑耐高温清洁压裂液基础研究

项目名称： 阴离子双子表活剂-纳米粒子构筑耐高温清洁压裂液基础研究

项目编号： No.51474035

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 矿业工程

项目作者： 唐善法

作者单位： 长江大学

项目金额： 80万元

中文摘要： 低或无伤害清洁压裂液是低渗、致密油气藏及页岩气藏实施有效水力压裂并商业开采的重要保证。现有商业用阳离子表面活性剂清洁压裂液耐温差，对油气渗流通道存在吸附润湿反转伤害，常规阴离子表活剂清洁压裂液则用量偏高、高温欠稳定。因此高温下清洁压裂液稳定增稠机制与构建方法仍是待解决的科学问题。本项目利用阴离子双子表面活性剂吸附损失与临界胶束浓度低、无润湿反转伤害特性，构筑无伤害低浓度阴离子双子表面活性剂体系，研究其分子结构与溶液粘度间构效关系，设计耐温增稠表活剂分子结构；借助纳米粒子高表面效应、高物理化学作用活性，构建阴离子双子表面活性剂-纳米粒子耐高温体系，研究纳米粒子-阴离子双子表面活性剂协同增稠规律，优选高温增稠纳米粒子；通过纳米粒子对阴离子双子表面活性剂分子间缔合方式及胶束结构形态影响研究，阐述纳米粒子阴离子双子表面活性剂粘弹流体高温增稠机理，为新型低成本耐高温清洁压裂液研制与应用提供理论依据。

中文关键词： 阴离子双子表面活性剂；纳米粒子；清洁压裂液；高温；粘弹流体

英文摘要： A low damage or no damage clean fracturing fluid is an important guarantee that low permeability and compact hydrocarbon reservoir,shale gas reservior conduct an effective hydraulic fracturing and commercial exploiting.However,commercially existing cationic surfactant clean fracturing fluids have poor temperature-stable ability and an adsorbability wettability reversal damage for oil and gas seepage channel,and normal anionic surfactant clean fracturing fluids have disadvantages of large dosage and bad high temperature stability.Therefore,the stable thickening mechanism and construction method of clean fracturing fluid under high temperature are still a science issue to be solved.This project constructs a low concentration and no damage anionic Gemini surfactant system by utilizing the anionic Gemini surfactant characteristic that it has lower adsorption loss and lower Critical Micelle Concentration(CMC) than normal anionic surfactant,as well as no adsorption wettability reversal damage,researches structure activity relationship between anionic Gemini surfactant molecular structure and its solution viscosity,designs anionic Gemini surfactant molecular structure for thickening in higher temperature.And builds high temperature resistant system of anionic Gemini surfactant and nanoparticle by means of high surface effect and high physical-chemistry activity of nanoparticle,investigates collaborative thickening law between nanoparticle and anionic Gemini surfactant,optimize and select nanoparticle for high temperature thickening.And elaborates the thickening mechanism of nanoparticle-anionic Gemini surfactant visco-elastic fluid in high temperature through studying the influence of nanoparticle on association mode among anionic Gemini surfactants and its micellar structure form,and all that will provide theoretical basis for constructing new inexpensive high temperature stability clean fracturing fluid and its field application.

英文关键词： anionic Gemini surfactant;nanoparticle;clean fracturing fluid;high temperature;viscoelastic fluid