摘要
针对生物胶存在用量高、耐温能力差等问题,通过醚化反应改性得到一种具有分子缔合能力的生物胶FAD-120,形成适合70-130℃致密储层的压裂液体系。研究表明：体系具有速溶、适应高矿化度水、低摩阻、携砂性能强、残渣低、伤害小、安全环保等特点,与瓜胶压裂液相比,具有配方简单、配制方便、水质适应性强、成本低等特点。该体系在长庆油田池228区块现场试验,使用矿化度为3334 mg/L浅层地下水配液,实现最高砂比为25%,同区块单井加砂量与瓜胶压裂液加砂量相近。生物胶FAD-120压裂液现场应用的成功,对扩大压裂液配液水源、降低压裂液成本以及保障大规模体积改造的顺利实施有重要意义。
FAD-120, a modified（through etherification） biopolymer is made to overcome conventional biopolymer＇s deficiency, such as high consumption and low temperature stability. FAD-120 is suitable for use in fracturing tight reservoirs, whose formation temperature is in the range of 70-130 ℃. FAD-120 is ready to dissolve in water, even in high salinity saltwater. FAD-120 solution has low friction coefficient, good sand-carrying capacity and low residue（hence low formation damage）, and is environmentally friendly. Fracturing with FAD-120 is much easier to operate than guar gum. FAD-120 is also cheaper than guar gum, and can be used in water of different quality. In a field application in Block Chi-228 in Changqing, shallow underground water having salinity of 3,334 mg/L was used to prepare the fracturing fluid; the maximum sand content was as high as 25%. In the same block, sand consumption in fracturing a single well is almost the same as guar gum fracturing fluid. The success of FAD-120 is of great significance in fracturing fluid preparation with water of different quality, reducing the cost of fracturing fluid, and in ensuring the operation of large-scale volumetric stimulation of reservoir.
出处
《钻井液与完井液》
CAS
北大核心
2016年第2期117-121,共5页
Drilling Fluid & Completion Fluid
基金
中国石油天然气股份有限公司课题"特低
超低渗油藏高效改造关键技术"(2011B-1202)
国家科技重大专项"低渗特低渗油气储层高效改造技术"(2011ZX05013-003)
关键词
增产措施
缔合压裂液
改性生物胶
回收再利用
低成本
Stimulation measure
Association fracturing fluid
Modified biopolymer
Recycle
Low cost
作者简介
第一作者简介：明华，工程师，硕士，1984年生，从事压裂酸化新材料、新产品的研发工作。电话（010）69213115；E—mail：minghua69@petrochina．com．cn。
