纤维基纳米复合清洁压裂液性能研究  

Performance of fiber assisted nanocomposite clear fracturing fluid

作　　者：罗明良[1] 高遵美[1] 黄波[2] 李佳琦[2] 刘婷 袁庆霞 杨薇钊 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中国石油新疆油田分公司采油工艺研究院,新疆克拉玛依834000 [3]中国石油克拉玛依石化公司,新疆克拉玛依834003 [4]中国石油吐哈油田分公司甲醇厂,新疆鄯善838202

出　　处：《应用化工》2012年第12期2060-2063,共4页Applied Chemical Industry

基　　金：国家自然科学基金(50904076);山东省自然科学基金(ZR2012EEM001);山东省优秀中青年科学家科研奖励基金(BS2012HZ029)

摘　　要：鉴于早期阳离子型清洁压裂液在低渗透砂岩储层现场应用中存在的问题,选取一种阴离子表面活性剂为主剂,制备了纤维基纳米复合清洁压裂液(F-NCF),并对其悬砂、滤失、破胶、岩心伤害及裂缝导流能力的影响等性能进行了评价。结果表明,阴离子型纳米复合清洁压裂液热稳定性明显增强,在70℃、170 s-1条件下,其表观黏度达50 mPa.s;通过纳米TiO2与粘弹性表面活性剂胶束的拟交联作用,提高了F-NCF的降滤失性能,且不影响破胶性能;纤维网状结构有效地改善了F-NCF的静态悬砂性能,且对裂缝导流能力影响较小;同时,该体系对岩心渗透率伤害小,恢复率约为90%,对于提高低渗透油气藏压裂效果具有良好的应用前景。In view of the existing problems for the cationic clean fracturing fluids application in low per- meability sandstone reservoir, to select a kind of anionic surfactant, the fiber assisted nanocomposite clear fracturing fluid （F-NCF） was prepared. The properties, such as the sand suspending, fikration, gel-bro- ken, core damage and fracture conductivity etc. were evaluated. The results showed that the thermal sta- bility of anionic nanocomposite clean fracturing fluid increases noticeably, at 70 ℃ and 170 s-1,its appar- ent viscosity reaches 50 mPa · s;The pseudo-crosslinking between nano-TiO2 and viscoelastic surfactant micellar improve its loss performance and does not affect the gel breaking performance; Fiber network structure effectively improve the static suspended sand performance of fracturing fluid, and less effect on fracture conductivity;At the same time, the core permeability damage is very low and the permeability re- covery rate is about 90%. There is good application prospect to improve the low permeability reservoir stimulation effect.

关 键 词：阴离子型清洁压裂液 纳米复合 纤维 热稳定性 滤失性 裂缝导流能力 

分 类 号：TQ423.99[化学工程] TE358.1[石油与天然气工程—油气田开发工程]