Where is shale gas mainly distributed in China, and what technologies are needed for exploitation?

With the increasingly prominent environmental problems, natural gas, as a clean energy, has become an important part of national energy. Shale gas is rich in natural gas, accounting for a large proportion in natural gas. Sichuan Basin has proved that Fuling, Weiyuan, Changning, Roewe and other central and eastern regions, northwest region and Qinghai-Tibet region all contain a large amount of shale gas. China has established a shale gas development base here, and some areas have made breakthrough progress. Some of the natural gas we use now comes from these areas.

The physical characteristics of low porosity and permeability make it very difficult to develop shale gas. The development technology of shale gas is rarely mastered by the state. Hydraulic fracturing and horizontal well technology are the main technical means to exploit shale gas, and they are also often used in many countries. At present, this technology is relatively mature, which improves the exploitation of shale gas reservoirs. However, there are some shortcomings in the current technology, and it is necessary to further develop advanced technology to make up for them.

Shale gas is a precious wealth left by nature. Generally, it is a sparsely populated deep mountain forest, so it is necessary to adopt appropriate mining technology according to the specific analysis of different landforms. The composition and content of clay minerals and brittleness are important considerations. In the aspect of reservoir reconstruction technology, the wide application of acidification technology is beneficial to the surface development of shale gas. Repeated fracturing technology and artificial lifting technology solve the problem of fracture propagation during mining, and vertical well and horizontal well technology can improve the stability of mining.

The shale gas exploitation technology in China started late, and now it is inefficient in the shale gas base where exploitation is difficult. The United States is the first country to realize the value of shale gas and has a lot of advanced technologies. Horizontal well staged fracturing technology, repeated fracturing technology and synchronous fracturing technology all have their own unique technologies, which also solve many problems in the mining process. ?