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AssigneeSouthwest Petroleum University
InventorsQi JIANG, Zhirui GUAN, Guanchen JIANG, Nanfang ZHENG
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The invention relates to a single horizontal well gravity oil drainage production device and method of using downhole steam generation. The continuous coiled tubing string is lowered into a horizontal well, the combustion aided agent, fuel and water are sent downhole through corresponding paths to be heated to the supercritical state of water by the preheater. Continuous combustion is conducted in the steam generator to produce water vapor and carbon dioxide. Steam is injected into an oil formation through a steam generator outlet, and heated crude oil and steam condensate water enter the horizontal well downward and flow into the oil production pump to be lifted to the ground. The single horizontal well gravity oil drainage production device and method are reliable in principle, steam injection and oil production lifting work cooperatively in the same horizontal well, saving production cost.
A single horizontal well gravity oil drainage production device using downhole steam generation, comprising a high-temperature-resistant dual-tube injection-production well head, and a downhole steam generation and injection system and an oil production lifting system that are lowered into the hole through the well head, wherein the steam injection system consists of a continuous coiled tubing string, a water tank, a fuel tank, a combustion aided agent tank, a preheater, an igniter, a steam generator, a power supply, and a test signal receiver, and the continuous coiled tubing string comprises a path for conveying the combustion aided agent, fuel, and water, and a path for conveying power and receiving test signals;
Dependencies are inferred from the claim text.