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目前水平井在热采中的应用大多处于试验阶段,但是一些在沥青层和稠油层水平井的工业生产表明,水平井对于热采有着可观的优越性和经济效益。改善扫油效率:在层状储集层中,可以在若干产层布不同的水平井,利用一个层域的热损失来加热加一个层域的生产井。还可以利用两口平行的水平井来进行蒸汽驱动或蒸汽吞吐来提高扫油效率。增加蒸汽注入:在稠油层中,要提高产量还是要靠水平井的蒸汽注入。在热采中,水平井既可以用作注汽井,也可以用作生产井。水平井的井简与地层接触面积大,用作生产井时可以提高产量;用作注汽井时可以提高蒸汽注入量,使产量增加,加利福尼亚的奥林油田和中途落日油田分别在原垂直井的基
At present, the application of horizontal wells in thermal recovery is mostly in the experimental stage, but some industrial production in horizontal wells of asphalt and heavy oil shows that horizontal wells have considerable advantages and economic benefits for thermal recovery. Improve sweep efficiency: In stratigraphic reservoirs, a horizontal well may be heated in a single zone by using heat losses in one zone to heat different horizontal wells in several zones. It is also possible to use two parallel horizontal wells for steam-driven or steam-hunt to improve sweep efficiency. Increase steam injection: In a heavy oil reservoir, horizontal steam injection is required to increase production. In thermal recovery, horizontal wells can be used as steam injection wells, can also be used as a production well. The horizontal well has a large area of contact with the formation and can increase production when used as a production well. When used as a steam injection well, steam injection can be increased to increase production. Olin and Midway Oilfields in California are located in the original vertical well base