Design of a compressor station at the wellheads of Bakhrabad gas field to study its effect on gas recovery

Abstract

Bakluabad Gas Field is located approximately 41 miles east of Dhaka in central Bangladesh. The owner of Bakhrabad gas field is Bangladesh Gas Fields Co. Ltd. (BGFCL), a company ofPetrobangla. Bakhrabad gas field went into gas production in May, 1984 at the rate of 25 Ml'vIscfd.There are 8 (eight) wells in Bakhrnbad Gas Field. Once gas production rate from Bakhnlbad gas field was sHghtly above 200 MMscfd lTom8 (eight) wells in 1992 to meet the major portion of country's demand. 1 Because of overproduction, the reservoir pressure started In decline rapidly with significant sand and wllter production. Presently, there are only 4 (four) producing wells with total production oDS MMscfd. Ot:her wells are shut-off due to pressure decline and water production. ~ delivery pressure from this field is about 550 psi which is causing under-utilization ofBakhrabad-Chittagong gas pipeline. At present, it is time to think about some secornlllly recovery method like installing compressors to recover additional gas from the reservoir. Installing compressor station is one of the techniques to recover additional gas from reservoir as well as JDlIintaining desired discharge pressUre of the field. In this study, viability of , installing compressor facilities at Bakhrabad Gas Field has been investigated The required horsepower of the compressor and cooling requirement have been calculated using different approaches. Economic analysis shows that installing coIlljlressor filciIilies is a viable option, that would recover additional gas from the reservoir.