Study on injection-production pattern of horizontal wells in low permeability reservoir:A case from OTRA oilfield,Algeria

Horizontal wells have shown evident advantages of high per-well production,high degree of reserves control and high economic benefit in reservoir development.A numerical simulation has been conducted by building a 3D geological model of the OTRA oilfield to optimize horizontal well location,pattern and water injection.The development mode of early-period depletion and postponed water injection into the top reservoir is recommended.The distribution of horizontal section is optimized according to the variation of interbeds.The implementation of 6 horizontal wells in this oilfield indicates that all the wells had encountered favorable positions in the reservoir and attained high production.