渤海L油田水平井含水上升规律分析与应用实践OA

In order to explore the dynamic and static parameter changes that affect the water content rise of horizontal wells in braided river sandstone reservoirs,the current research on the water content rise law of horizontal wells mainly focuses on bottom water reservoirs,and there is relatively little re-search on other reservoirs.Firstly,based on the actual situation of the mine,the water content rise patterns of horizontal wells are divided into concave,S-shaped,convex,and linear types.Secondly,geological and development factors are considered.Based on numerical simulation methods and entro-py method,the main controlling factors of the water content rise law of horizontal wells are systemat-ically analyzed,and corresponding tapping strategies are proposed.The research shows that the main controlling factors of horizontal well water cut rise are the timing of encryption,well spacing and lon-gitudinal position of the horizontal well.For positive rhythm reservoirs,it is recommended to deploy horizontal wells in the upper 1/3 of the thick layer,and the reservoir permeability should be greater than 400×10-3 μm2.For water breakthrough wells in the early stages of production,it is recommen-ded to reduce the injection-production ratio or stop injection until the formation pressure drops to near the saturation pressure,and utilize water injection and profile control and flooding,achieving the goal of controlling water and increasing oil.This research provides theoretical support for the deployment of horizontal wells in braided river sandstone reservoirs.