改性生物胶压裂液的制备与应用  

Preparation and Application of Modified Biopolymer Fracturing Fluid

作　　者：明华[1,2] 翟文[1,2] 樊永杰 江智强 刘炜[5] 

机构地区：[1]中石油勘探开发研究院廊坊分院,河北廊坊065007 [2]中石油油气藏改造重点实验室,河北廊坊065007 [3]长庆油田分公司第三采油厂,银川750000 [4]长庆油田分公司油气工程研究院,西安710021 [5]中国石化江汉油田分公司采油工艺研究院,武汉430035

出　　处：《钻井液与完井液》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)

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.

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 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]