Research and Practice on Injection and Production Balance Adjustment Technology for Offshore Complex Fluvial Facies Oilfield

Bohai A Oilfield is the first fluvial facies oilfield in Sea to be developed using a horizontal well layering system. It has characteristics of thin single sand reservoir thickness, large differences reserve scale, rapid lateral changes reservoirs, and staggered stacking multiple river channel bodies vertical direction. In production, it characterized by decline ground pressure, increase water content, decrease oil production. order achieve efficient development Oilfield, based on dissection body configuration study internal injection-production connectivity within reservoir, systematic optimization balanced adjustment principles been developed. By changing pressure gradient field between injection wells production wells, six character fine balance strategy "infill, increase, control, limit, guide, drive" implemented, resulting 3.6% overall recovery rate, We have achieved goal continuously stable 1 million cubic meters for 12 consecutive years. The practice proven that technology effectively solved main challenges faced enriched means methods offshore complex oilfields, positive reference significance other similar oilfields.