Pre-trial work conducted by Bass has pointed to a potential increase in output and ultimate recoveries of around 10% per well.
This 10% is a target to be tested by Bass when it moves to a six-month water injection pilot in the first half of next year.
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Bass managing director Tino Guglielmo said the principle behind the field trial and pilot plant program was that ionic exchange between the oil and the clays would release oil from smaller pore spaces, increasing ultimate recoveries.
He added: “The pilot project will be conducted over six months and the results monitored to determine the degree of increased recovery compared with existing baseline production rate values.
“Internal studies suggest that low salinity water injection will increase oil production and recoveries by up to 10%.”
The company’s in-field trials are being supported by its memorandum of understanding (MoU) with the Bandung Institute of Technology in Indonesia to trial low-salinity water injection (LSWI) at Bass’ producing Tangai oil field in South Sumatra.
The purpose of the MoU is to facilitate collaboration on research to implement “smart”, low-salinity water-flooding systems for enhanced oil recovery specific to onshore Indonesian fields.
Bass and the university expect to start the pilot water injection project in January next year, subject to positive first field trial results as well as approval by Indonesia’s state-owned oil and gas corporation PT Pertamina.
Guglielmo continued: “Bass has welcomed the opportunity to work alongside this highly respected Indonesian university and its LSWI research team to apply the outcomes of the studies and laboratory trials to the field-scale pilot project to improve oil recoveries from Bass’ current and expanding portfolio of oil properties.
“This mutually beneficial relationship could see Bass significantly benefit from the outcomes of the studies in improving oil recovery techniques using this relatively low-cost technique.
“Bass has observed that, on average, oil recovery factors achieved in Indonesian oil fields remain relatively low when compared to other regional anologue.
“This presents the company with a significant business growth opportunity.”