“At present, the development of shale gas in China still faces many challenges.” “There is still a gap in the actual development and utilization of shale gas”... On November 18th, a key experiment in resource stratigraphy and palaeogeography in the Institute of Geology and Palaeontology, Chinese Academy of Sciences At the seminar on the formation and distribution of shale gas in the south of China, experts believed that shale gas mining is different from conventional oil and gas fields, and has the characteristics of high exhaust gas depletion rate and insufficient stamina.
The exploitation resources of marine shale gas in southern China account for about 87% of the total recoverable resources of domestic marine shale gas. The prospects for exploitation of shale gas in the south are promising. If we can overcome the obstacles, it is bound to bring new shale gas exploitation to China. The motivation. Experts at the meeting believe that we should open up a new gas area in southern China as soon as possible, strengthen basic research and technological research, and strive to achieve 30 billion cubic meters of annual output by 2020.
Shale gas exploration breakthrough, development technology still needs to tackle
Shale gas is unconventional natural gas stored in organic-rich shales and their interlayers. In 2009, following the capture of technical and cost barriers, the United States shale gas revolution swept the world. This has brought great imagination to China, which lacks oil and gas.
Chen Xu, an academician of the Chinese Academy of Sciences, told reporters that the most mature area for shale gas extraction is the Sichuan Basin. The annual output of shale gas is expected to reach 10 billion cubic meters, equivalent to replacing more than 15 million tons of raw coal and reducing carbon dioxide emissions by more than 10 million tons. . The replacement of coal can save energy use costs of more than 5 billion yuan. Substituting oil can save energy use costs of more than 300 billion yuan, which can drive regional GDP growth by more than 60 billion yuan.
Recently, major breakthroughs have been made in the exploration and development of shale gas in the upper and middle reaches of the Yangtze River. The mining area will be expanded to areas such as Yichang in Hubei Province and will promote China's annual production target of 30 billion cubic meters.
“At present, China has basically mastered the advanced horizontal well staged fracturing technology, and has achieved independent innovation in key technologies and equipment, and has infiltrated shale gas exploration and development technology at a depth of 4 kilometers, which is basically available.” Related industries Experts told reporters.
The horizontal well fracturing technology is the key to shale gas development. It has the characteristics of large deflated area, high single well output and high reserve utilization.