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38446 BPCH7530 Rev. 08/2014

Results

Mixed production system

More cost effective than triazine in

mixed production systems

Does not cause mineral scale to form

Delivers lower hydrogen sulfide (H2S)

values than triazine in mixed production

systems at much lower dosages

Challenges

South Texas shale oil

Customer was trying to lower the

amount of (H2S) in the produced fluids

for health, safety, and environmental

(HSE) reasons to below 10 parts per

million (ppm)

Because of the danger posed by H2S,

trucking companies will often not take

crude oil cargos if the H2S in the head

space of a tank is greater than 10 ppm

H2S has the odor of rotten eggs in

low concentrations, rapidly deadens

the sense of smell (0.2-0.13 ppm)

and can be offensive to neighbors

of production facilities

H2S is immediately dangerous to

life at concentrations of 300 ppm;

800 ppm is the lethal concentration

for 50% of humans for five minutes

of exposure (LC50)

H2S is highly corrosive to the mild steel

typically used in production facilities

Baker Hughes solution

Baker Hughes recommended

PETROSWEET HSO3507 H2S scavenger

to treat the mixed production, due to

the ineffectiveness of triazine

A customer in South Texas had a well

producing oil from the Eagle Ford Shale.

The production rates were 200 barrels of oil,

70 barrels of water and 250 mcf of gas per

day. The well also had 160 ppm of dangerous

and corrosive hydrogen sulfi de (H2S) in

the gas. The well was being produced to

a separator 100 feet away through a

four-inch fl owline.

The customer had tried a triazine-based

H2S scavenger to sweeten the production,

but it required a high amount of the triazine

product and they still could not get the

H2S below specifi cation because of the

short residence time in the system from

the wellhead to the separator.

At a rate of 15 gallons per day of the

triazine product, the H2S was decreased

to only 50 ppm in the gas phase. Triazine

is normally much less effective in mixed

production systems and can enhance

calcium carbonate precipitation.

Baker Hughes recommended PETROSWEET™

HSO3507 H2S scavenger as an alternative

to triazine. The PETROSWEET HSO3507

scavenger was injected into the fl owline at

the wellhead at a rate of 8.5 gallons per

day. The result was a reduction of H2S from

160 ppm down to 3 ppm.

PETROSWEET HSO3507 Hydrogen Sulfi de Scavenger Treats Mixed ProductionLocation: South Texas

PETROSWEET is a trademark of Baker Hughes Incorporated.

CASE HISTORY| bakerhughes.com