Oil shale underground in-situ jet splitting construction device and construction technology

Abstract

The invention discloses an oil shale underground in-situ jet splitting construction device and a construction technology. An underground in-situ oil shale is subjected to high-pressure water or high-pressure air and high-pressure water rotary high-pressure jet injection through the oil shale underground in-situ jet splitting construction device, so that the oil shale is changed to be in a small lump shape to provide advantageous conditions for oil shale splitting. The construction technology of the oil shale underground in-situ jet splitting construction device comprises the steps that a jet tool is adopted to drill into an oil shale target layer base plate from the earth surface, rotary jet splitting is conducted on the base plate, the oil shale layer is subjected to rotary jet splitting while the tool is lifted till rotary jet is conducted onto a target layer upper top plate, single-point rotary jet splitting is finished, and according to the splitting condition, single-point repeated splitting can be conducted; and then rotary jet splitting of a next point is conducted till point rotary jet splitting of all points of a designed point position is finished. By adoption of the oil shale underground in-situ jet splitting construction device and the construction technology, splitting of all the points can be achieved, and the splitting ranges are overlapped, so that the overall oil shale target layer is evenly split to be in a small block or powder shape, the condition that heat energy is permeated into the oil shale is facilitated, and the purpose that the oil shale is subjected to sufficient heating splitting is achieved.

Description

technical field [0001] The invention relates to the field of shale oil exploitation, in particular to an oil shale underground in-situ jet splitting construction device and construction technology. Background technique [0002] At present, the world's shale oil resources are about 411 billion tons, which is equivalent to three times the world's proven recoverable reserves of crude oil and condensate oil. my country's shale oil resources are about 47.6 billion tons, which is equivalent to traditional oil resources. 1.5 times the amount of shale oil, ranking fourth in the world, 2.7 billion tons of shale oil resources have been identified, accounting for only 5.67% of shale oil resources. Therefore, the world and my country are rich in shale oil resources. After crude oil, shale oil is the largest oil resource. [0003] In 2011, my country's dependence on imported oil was 55.2%, and it is expected that by 2020, the dependence on imported oil will reach 60%. At present, the da...

AI Technical Summary

Problems solved by technology

Due to the overall heating of the underground in-situ shale, it is difficult to crack the shale oil, and the cracked shale oil takes a long time to enter the production well, and continuous production cannot be carried out at all, just like the water in a well, if it flows in for a year, it will last for almost a year. It can be drained within a few days, and the production conditions and scale of shale oil production cannot be formed.

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