Efficient mining equipment and method of natural gas hydrate through horizontal well fracturing filling

Abstract

The invention belongs to the field of energy and environment, and provides efficient mining equipment and method of natural gas hydrate through horizontal well fracturing filling. The equipment comprises a pressure monitoring system, a horizontal well fracturing filling system, a sand prevention system and an automatic control feedback system. The problem of difficulty in pressure transmission dueto the fact that low permeability of muddy sediment in the mining process of the natural gas hydrate causes the conditions of secondary generation and ice blockage of the hydrate are solved. Additionally, the pressure permeability range is effectively extended by utilizing the fracturing filling system, and a support agent is solidified in a fracturing area, so that the fracturing area and a gastransfer channel are stabilized, and the hydrate decomposition process is obviously intensified. A gas collecting port is effectively prevented from being blocked by fine sands in a fracturing processby the sand prevention system in a gas production process, and the sand prevention system is flushed by utilizing the fracturing system in the mining process of the natural gas hydrate, so that the problem of easiness in blockage of the sand prevention system is solved. According to the equipment and the method, the safe and efficient large-scale mining of the marine gas hydrate is promoted.

Description

technical field [0001] The invention belongs to the field of energy and environment, and relates to a device and method for exploiting natural gas hydrate resources Background technique [0002] With the rapid development of my country's economy, the demand for energy is becoming more and more prominent, and the dependence on foreign natural gas, oil and other energy sources is also increasing. Due to political and military reasons, the price and transportation volume of the international energy market fluctuate, which has a great impact on my country's economic development. had a huge impact. Therefore, it is imminent to ensure my country's energy supply and energy security. Natural gas hydrate is a kind of clean energy with huge reserves. The resource reserves in the South my country Sea of ​​China reach 80 billion tons of oil equivalent. To realize its safe and efficient development is a major energy strategic demand of our country. Natural gas hydrate is a crystalline c...

AI Technical Summary

Problems solved by technology

Vertical wells are usually used for natural gas hydrate exploitation. The problems of this arrangement are short pressure transmission distance and small decomposition area, which is not suitable for small thickness and wide distribution of natural gas hydrate deposits.

Fracturing technology is a technical means to achieve fragmentation of tight rock formations by means of high-pressure liquids. It has been widely used in shale gas development in recent years. Cannot be used directly in marine gas hydrate reservoirs

In addition, due to the small particle size of marine sediments, particles with a diameter of less than 10 microns can account for more than 40%, causing fine sand to migrate with gas and water production during the hydrate mining process, causing wellhead blockage and terminating the mining process

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