000			01956nab a2200229 4500
005			20260520003103.0
008			260224s2012 xxu ing
041			_aInglés
245	0	0	_aThe Effect of Hydrogen Sulfide Concentration on Gel as Water Shutoff Agent
260			_a _b _csept./oct. 2012
270			_a22/08/2013 ; 22/08/2013
300			_a6 p. ; 355-361
520			_aTraducción del resúmen del autor: For drilling and water shutoff of oil and gas reservoirs containing hydrogen sulfide (H2S), the effects of H2S on widely used gel as water shutoff agents are studied. The gels include Na2Cr2O7/Na2SO3/HPAM gel, Na2Cr2O7/(NH2)2CS/HPAM gel, Cr(III)-acetate & Cr(III)-lactate/HPAM gel and phenol formaldehyde resin/HPAM gel. The results show that: for Na2Cr2O7/Na2SO3/HPAM gel and Na2Cr2O7/(NH2)2CS/HPAM gel, the H2S as reducing agent (the reducibility is more efficient than that of Na2SO3and (NH2)2CS) can reduce Cr(VI) into Cr(III) and accelerate crosslinking reaction with HPAM in low concentration of H2S, while it can react with Cr(III) generating Cr2S3 precipitation in high concentration of H2S, for which the bulk gel can not form without Cr(III); for Cr(III)-acetate & Cr(III)-lactate/HPAM gel, H2S can prolong the gelation time and reduce the gel strength by decreasing pH value; for phenol formaldehyde resin/HPAM gel, H2S can slightly prolong the gelation time and slightly reduce the gel strength by decreasing pH value. Therefore, according to the comprehensive investigations of the effects of H2S on gel as water shutoff agents, the phenol formaldehyde resin/HPAM gel is recommended as the water shutoff agents suitable for oil and gas reservoir containing H2S.
581			_a2
773	0		_tOil and Gas Science and Technology _g68
942			_cARTICULO
100	1		_aYou, Q. _953435
100	1		_aMu, L. _953436
100	1		_aWang, Y. _928527
100	1		_aZhao, F. _953437
999			_c187851 _d187851