Research and application of gravel-packing flow-regulation water-control screen completion technique in horizontal wells

Abstract

Horizontal well inflow control screen completion require packer to stage on the reservoir, however, the numbers of packer are limited to section of the reservoir, the reservoir sealing length is limited by packer rubber, effective sealing length is short, that restricts to the control precision of ICD in horizontal wells. In view of above, this paper presents a new horizontal well gravel packing inflow control screen completion technology, that uses gravel to replace the packer to seal the reservoir, resisting the transverse flow in the wellbore, making the inflow control screen can control water directly on formation in which the position is located, to realize the dynamic adjustment the flow profile in the whole horizontal well section. From the technological principle and characteristics, key implemental technology, gravel and supporting tools, construction technology and other aspects of horizontal well gravel filling, the gravel packing inflow control screen completion technology were studied. The technology was applied in adjustment horizontal well completion in the xinjiang A oilfield. After application, the oil production increased by 5.1 times, the water content decreased by 13.5%, and achieved a good effect of controlling water coning and increasing oil. The application results suggest that horizontal gravel inflow control screen pipe completion technology can improve the effect of inflow control screen completion, that could be applied in the new wells and old wells second completion.