Brady Plant treating project

Conference · Thu Jul 01 04:00:00 EDT 1999

OSTI ID:20000890

Miller, E W; Soychak, S J; Reed, A E; Bartoo, R K; Ackman, R

The Brady Plant located in Southwest Wyoming was built in 1975 to provide pressure maintenance for the Weber reservoir and for condensate and NGL recovery from the produced sour well stream. The plant was designed to process 64 MMscfd of sour gas recovering 3,700 b/d NGL and 12,000 b/d of condensate. The NGL product was fractionated and sold to local markets, the condensate pipelined to sales and the dehydrated sour gas injected back into the Weber reservoir. Economics for continuing this operation were becoming marginal so a decision was made to blow-down the reservoir and market the gas. The sour gas contains 39% carbon dioxide and 2% hydrogen sulfide. A two stage treating system using Union Carbide's UCARSOL{trademark} HS-115 solvent and the UOP BenfieldSM process were selected to treat 60 MMscdf. The UCARSOL Treater has a circulation rate of 1,270 gpm and removes essentially all of the H{sub 2}S and 33% of the CO{sub 2}. Approximately 9 MMscfd of acid gas (86% CO{sub 2} and 14% H{sub 2}S) from the treater is compressed from 5 psig to 2,000 psig and injected into disposal wells. The Benfield Unit with a circulation rate of 2,700 gpm removes 17 MMscfd of the remaining CO{sub 2}. The CO{sub 2} is vented through a thermal oxidizer. Sweet gas is dehydrated and 30+ MMscfd is compressed to a sales gas pipeline. Five Ingersoll Rand compressors that were originally installed for injection and process service were modified to provide inlet and residue gas compression as well as acid gas disposal. In August 1997 the plant was shut down for compressor modifications and to tie in the new treating units. Some of the features that make this facility unique area: compressing the dense phase fluid into the injection line without prior dehydration; a larger capacity acid gas disposal system than most currently in service; treating the inlet gas at 300 psig to save inlet gas compression; fuel gas savings over other processes; and slippage of CO{sub 2} through the Ucarsol Unit. Optimized Process Designs (OPD) was the prime contractor and was responsible for design engineering, procurement, fabrication and construction of the treating facility. The facility was started in March 1998.

• Research Organization: Union Pacific Resources, Inc., Rock Springs, WY (US)
• OSTI ID: 20000890
• Report Number(s): CONF-990331--
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
CARBON DIOXIDE
DESIGN
GAS CONDENSATES
HYDROGEN SULFIDES
MATERIALS RECOVERY
NATURAL GAS LIQUIDS
NATURAL GAS PROCESSING PLANTS
OPERATION
SCRUBBING
WYOMING