China oil network news in September 26th, two in Huabei Oilfield of Erlian Basin deployment of coalbed methane in low rank coal, coal 1-1 producing well, has 10 consecutive days, Nissan more than 1100 cubic meters of gas.
Based on the theory and development of coal-bed gas discharge mining technology and other aspects of the innovation, not only in Huabei Oilfield Shanxi basin Nanqin high rank coal gas to achieve high efficiency, more in the fractured coal and low rank coal mainly in Shanxi Changzhi, Linfen area and two Erlian Basin in low rank coal resource area, continuous breakthrough industrial gas shut.
Since the North China oil field entered the coalbed methane field in 2006, it has reached an annual output of 500 million cubic meters in only 5 years. But 5 years ago, the domestic coal-bed methane enterprises have entered the two or three types of low efficiency areas, mainly in the middle and low levels of coal, and suffered technical bottlenecks. A large number of low production wells, as well as the subsequent downward price of natural gas, make coal-bed methane industry subject to severe challenges.
Beginning in 2013, Huabei Oilfield has identified 4 aspects and 23 subjects, focusing on strengthening coalbed methane, coal seam geology, reservoir reconstruction and development methods, and striving to solve the technical problems of coalbed methane production at a deeper level. Technical personnel from the source of in-depth study of the characteristics and development law of coal seam gas distribution, analysis of coalbed gas "compression characteristics of reservoir mechanism, heterogeneous adsorption characteristics and the depressurization need" is different from the conventional gas field, in the geological theory, exploration method, engineering technology, production mode in areas such as the formation of important innovations.
On the basis of this innovation system, the gas production rate of single coalbed methane in high rank coalbed methane in North China Oilfield has doubled, and the proportion of industrial gas wells in middle and low rank coal area rises from 50% to 80%, and the highest daily output reaches 2900 cubic meters.
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