第34卷第4期 2017年7月
钻井液与完井液
DRILLINGFLUID&COMPLETIONFLUID
doi:10.3969/j.issn.1001-5620.2017.04.021
Vol. 34 No. 4 July2017
压裂用纳米体膨颗粒裂缝封堵性能实验研究李丹，伊向艺1.2，王彦龙「，石栗1，问晓勇3，刘享
（1.成都理工大学能源学院，成都610059；2.油气藏地质及开发工程国家重点实验室·成都理工大学，成都610059：
3.中国石油长庆油田分公司油气工艺研究院，西安710021）
李丹，争向艺，王产戈 LI Dan,YI Xiangyi.
Tanopa 旺诺
关诺
中图分类号：
压用：
等股研
钻井液与完井液，2017.34（4）：112-116
performance of volumetric expansior 2-1t
时低渗透储心封实
配冲刷性
001-5620
2017304-0
12-05
Experimental Study on Fracture Plugging Performance of Volumetric Expansion Nano Particles Used
inWellFracturing
LI Dan', YI Xiangyi.z, WANG Yanlong', SHI Lil,WEN Xiaoyong', LIU Xiang
(1. College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059; 2. State Key Laboratory of Oil and Gas Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichaan 610059; 3. Research Institute of Oil and
Gas Technology,PetroChina Changging Oifeld Company,Xi'an, Shaanxi 710021)
Abstract Nano particles as plugging agent used to shut off fractures with small sizes have been frequently studied in recent year, while their use in shutting off water-producing fractures in low-permeability reservoirs in fracturing operation is less studied. In this study nano particles were selected for fracture plugging experiment. Nano particles' ability to shut off fractures producing water and fractures producing oil was evaluated on a self-made core plugging experiment device. Nano particles' expandability, injectability and the resistance to washing in fractures with water flow were also studied. The experimental results showed that the volumetric expansion nano particles absorb water and expand greatly in water environment. In oil environment, the nano particles have very weak expandability. The nano particles can shut off fractures producing water very well. The amount of water shut off at confining pressure of 40 MPa and 50MPa can be as high as 90%. In shutting off fractures with oil flow, there is only 30% of the oil shut off. The nano particles have good injectability; at confining pressure of 40 MPa, 3 PV of fluid containing 2% nano particles were injected into fractures with water flow, and they stayed firmly inside the fractures after expanding for 4 d. These experimental data prove that the volumetric expansion nano particles will shut off water instead of oil, and can be used in well fracturing and water shutoff
Key werds Fracture generated in well fracturing; Volumetric expansion nano particle; Experimental study; Plugging performance; Expandability, Injectability; Resistance to flushing
基金项目：国家自然科学基金青年基金“碳酸茎岩储层酸岩反应表面形态与演化”（51504200)。
第一作者简介李丹，在读硕士研究生，研究方向为储层改遗及储层保护技术。电话17713597245;E-mail：510618532@qq.com。
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