Buccaneer Energy that operates exploration and production activities in Texas, United States, has completed an organic oil recovery pilot project in its Pine Mills field in East Texas.
One injector and two of four producing wells in the Northern section of Pine Mills (Battery 3 area) were subjected to treatment, resulting to a 100% production boost. To facilitate the process of organic oil recovery, a nutrient mixture was injected into the reservoir to stimulate the growth of naturally occurring microorganisms. The rapid growth of these microbes converts the surface properties from hydrophilic (attracted to water) to hydrophobic (repelled by water). This leads to better mobility of residual oil within mature waterflood systems, as the microbial action reduce the interfacial tension between the rock face and the reservoir oil. One treated producer experienced a significant reduction in water cut immediately following treatment.
The post-treatment period has not only recorded an increase from 15 bopd to approximately 30 bopd but maintained consistency. Water cut was nil from 80% in one of the treated wells.
With costs akin to any routine field workover, the company is currently planning follow-up treatment of the remaining two producing wells.
The company will continue to evaluate production performance at the treated wells while also designing the next phase of field implementation.
Paul Welch, Buccaneer Energy's Chief Executive Officer, said, "We are very encouraged by the success of the Pilot Project where average production from the area treated increased 100% to 30 bopd. The initial results significantly exceeded our expectations. The process is well-suited to mature waterfloods, like Pine Mills, where the "easier oil" has been produced and a large amount of residual oil remains in place. Efficiently dislodging this residual oil has a significant impact on production rates. One of the treated producers in the Pilot went from an 80% water cut to a 0% water cut after treatment, a remarkable result.
"Most importantly, the cost of this treatment is modest and comparable to a routine workover, meaning it can be applied without a material capital investment.
"As highlighted in our recent reserve update, Pine Mills carries an NPV10 of approximately $9.6 million at $60 oil pricing. Our current market capitalisation is approximately £1.3 million. Our focus is on closing that gap through incremental production growth, improved recovery and disciplined execution. We see this programme as a practical step toward converting underlying reserve value into cash flow and look forward to updating shareholders as we expand the initiative across the field."
