To solve the problem of unloading liquid of deep gas well with high gas temperature and salinity, high concentrations of H2S gas and condensate oil, a nanoparticle foam unloading agent was developed and evaluated, and the field test was carried out. The liquid phase foam unloading agent was prepared by blending high temperature resistant anionic surfactant, high salinity and H2S resistant zwitterionic surfactant and the condensate oil resistant fluorocarbon surfactant. The nanoparticle foam unloading agent was developed by introducing silane coupling agent modified nano silica spheres into the liquid phase foam unloading agent as the solid foam stabilizer. The property of nanoparticle foam unloading agent was studied through lab experiment, and the results show that: the agent has temperature resistance as high as 150 ℃, salinity resistance up to 250 g/L, H2S resistance up to 0.04%, condensate oil resistance up to 30%, which proves high foaming ability and foam stabilizing ability. The optical microscope and zeta potential results show that: the mechanism of enhancing the property of liquid phase foam unloading agent by nanoparticles lies in the fact that the nanoparticles can adsorb onto the gas-water interface to form a solid particle film, and it has the best foam stabilizing effect at the modified nano-silica sphere concentration of about 0.002%. The field test results show that: the agent has steady performance, meets the site construction requirements, and can improve the water drainage - gas recovery efficiency in gas well and reduce the cost.
WU Junwen
,
LEI Qun
,
XIONG Chunming
,
CAO Guangqiang
,
ZHANG Jianjun
,
LI Jun
,
FANG Jin
,
TAN Jian
,
AI Tianjing
,
LI Nan
,
JIA Min
. A nano-particle foam unloading agent applied in unloading liquid of deep gas well[J]. Petroleum Exploration and Development, 2016
, 43(4)
: 636
-640
.
DOI: 10.11698/PED.2016.04.17
[1] 李农, 赵立强, 缪海燕, 等. 深井耐高温泡排剂研制及实验评价方法[J]. 开发工程, 2012, 32(12): 55-57.
LI Nong, ZHAO Liqiang, MIAO Haiyan, et al. Research & development of heat-resistant foaming agent for deep wells and its experimental evaluation methods[J]. Natural Gas Industry, 2012, 32(12): 55-57.
[2] PUGH R J. Foaming, foam films, antifoaming and defoaming[J]. Advances in Colloid & Interface Science, 1996, 64(95): 67-142.
[3] WEAIRE D, DRENCKHAN W. Structure and dynamics of confined foams: A review of recent progress[J]. Advances in Colloid and Interface Science, 2008, 137(1): 20-26.
[4] ENGELS T, RYBINSKI W Y, SCHMIEDEL P. Structure and dynamics of surfactant-based foams[J]. Structure, Dynamics and Properties of Disperse Colloidal Systems Progress in Colloid & Polymer Science, 1998, 111: 117-126.
[5] 王冬梅, 韩大匡, 许关利, 等. 部分水解聚丙烯酰胺对 α -烯烃磺酸钠泡沫性能的影响[J]. 石油勘探与开发, 2008, 35(3): 335-338.
WANG Dongmei, HAN Dakuang, XU Guanli, et al. Influence of hydrolyzed polyacrylamide on the foam capability of α -Olefin Sulfonate surfactant[J]. Petroleum Exploration and Development, 2008, 35(3): 335-338.
[6] PITKETHLY M J. Nanomaterials: The driving force[J]. Matter Today, 2004, 7(12): 20-29.
[7] DICKSON J L, BINKS B P. Stabilization of carbon dioxide-in-water emulsions with silica nanoparticles[J]. Langmuir, 2004, 20(19): 7976-7983.
[8] ARNAUD S J. Physical chemistry in foam drainage and coarsening[J]. Soft Matter, 2005, 2(10): 836-849.
[9] JOYE J L, HIRASAKI G J, MILLER C A. Asymmetric drainage in foam films[J]. Langmuir, 1994, 10(9): 3174-3179.
[10] IVANOV I B. Effect of surface mobility on the dynamic behavior of thin liquid films[J]. Pure and Applied Chemistry, 1980, 52(5): 1241-1262.
[11] XU G, ZHANG J, SONG G. Effect of complexation on the zeta potential of silica powder[J]. Powder Technology, 2003, 134(3): 218-222.
