A drilling and completion method for hot dry rock robotic explosive hydraulic fracturing

Abstract

The invention discloses a hot-dry rock robot explosion hydraulic composite fracturing well drilling and completion method. The hot-dry rock robot explosion hydraulic composite fracturing well drillingand completion method comprises the steps that a robot controls a reentrant tool to put down a drilling pipe string from a cluster type borehole inlet position, the drilling pipe string performs drilling operation on hot-dry rock double horizontal wells, and the drilling pipe string is pulled out by a coiled tubing operation vehicle after the drilling operation; the robot controls the reentrant tool to put down an explosion fracturing completion pipe string assembled on the ground from the cluster type borehole inlet position, and the robot drags the explosion fracturing completion pipe string and sequentially performs explosive fracturing at a plurality of fracturing points to complete the explosive fracturing operation; and the robot drags a hydraulic fracturing completion pipe string to a setting well depth position, fracturing fluid prolongs the length of an explosive fracturing crack under high pressure until the double horizontal wells communicate through the crack, and the hydraulic fracturing operation is completed. The robot technology is used in the drilling process for achieving intelligent closed-loop drilling, the cost of hot-dry rock drilling operation can be effectively reduced, a hot-dry rock crack network can be significantly optimized, and the risk of "heat transfer short circuit" is reduced.

Description

Technical field [0001] The invention belongs to the field of hot dry rock drilling and completion, and in particular relates to a hot dry rock micro wellbore robot explosion-hydraulic composite fracturing drilling and completion method that reduces the risk of "heat transfer short circuit". Background technique [0002] According to the survey and evaluation results of China's Ministry of Land and Resources and China Geological Survey in 2015, the amount of dry hot rock resources buried in the land area of ​​3,000-10,000 meters is equivalent to 856 trillion tons of standard coal, and the recoverable resources reach 17 trillion tons. Standard coal accounts for about 1 / 6 of the world's total hot dry rock resources. [0003] Dry hot rock is a dense and impermeable high-temperature rock mass without water or steam. It can be widely used for power generation, heating, and enhanced oil exploration. During the development process, it produces almost no pollutants such as nitrogen and sulf...

AI Technical Summary

Problems solved by technology

[0008] (1) It is difficult to control the mixing ratio and quantity of fuel, oxidant and water, or even fail to meet the combustion conditions;

[0009] (2) Fuel, oxidant and water are mixed in proportion in advance, and the mixture may burn on the ground and during the process of lowering, which poses a serious safety hazard;

[0011] (4) Existing robots use fast-curing liquid explosives, which are difficult to transport and cause great safety hazards during the transport process;

[0012] (5) Drilling and completion operations for multi-branch wells cannot be realized

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