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Study on Policies of Cooperation with Overseas Partners in China's Colabed Methane Industry
Zhang Guoliang and Sun Maoyuan
(China United Coalbed Methane Co. Ltd., Beijing 100011)Abstract: There are abundant coalbed methane resources in China. Compared with the natural gas development, the coalbed methane development has characteristics such as low output in a single gas well and long payback period. At present, China still lacks in mature coalbed methane development technology and therefore need attract overseas investments and import their advanced technology and management experience. This paper analyses support policies and their successful experience in overseas courtiers, especially in America. It also makes comparison with China's current industrial policies and proposes some suggestions for policies of cooperation with overseas partners in China's colabed methane industry.
Keywords: coalbed Methane; policy; regulation
Analysis of Misleading Theories in the Progress of Coalbed Methane Exploration
Zhang Suian
(Beijing University of Petroleum, Beijing 102249)Abstract: Based on the analysis of various coalbed methane wells around China, this paper suggests that there are mainly 3 reasons for failures during the progress of coalbed methane exploration: firstly, the misleading of the coalmine gas geological theories; secondly, the misleading of the normal hydrocarbon prospecting theories; thirdly, the misleading of American coalbed methane exploration theories. After many years' practice and exploration of coalbed methane, the writer proposes the coalbed methane exploration theories suitable for China's geological conditions, i.e. the theory of "high percolation and rich gathering area " .
Keywords: coalbed methane exploration; theory misleading; the theory of high percolation and rich gathering area
Research Actuality and Signification of Pore in Coal Reservoir
Wang Mingshou1, Tang Dazhen2 and Zhang Shanghu2
(1. China United Coalbed Methane Co. Ltd., Beijing 100011; 2. China University of Geosciences, Beijing 100083)Abstract: Former methods and productions about the pore research were summarized, and the research direction in pore characteristics of coal reservoir, which is aiming at CBM production, was proposed in this article.
Keywords: coal reservoir; pore structure; fractal geometry; permeability
The Fitting of the Coalbed Methane Production Curve and its Output Estimate
Tian Yongdong
(Shanxi Jincheng Anthracite Coal Mining Group Co. Ltd., Shanxi Jincheng, 048006)Abstract: Based on storage parameters of coalbed methane wells and hydro geological data, this paper first calculates the pressure decrease in the coal seam after the drainage and then gets the water output and methane output from wells by integrating parameters such as Lan's formula and threshold stripping pressure. The result will be used to compare with the actual production curve for curve fitting and establishment of reasonable estimating model, which will be used to predict the future output of water and methane in the coalbed methane well. It avoids complex calculations in the data simulation of stripping, expansion and vapour/water movement in the traditional methods.
Keywords: coalbed methane well; production curve; fitting; output prediction
The Prospect of the Application of CO2 Foam Fracturing in the Development of Coalbed Methane
Cong Liantao1£¬2 , Wu Qinghong3, Zhao Bo3 and Zhang Suian4
(1. China University of Mining and Technology, Xuzhou, Jiangshu 221008; 2. Langfang Brach, Research Institute of Petroleum Exploration and Development, Lang Fang, Hebei 065007; 3.President Office, SINOPEC, Beijing 100011; 4. Beijing University of Petroleum, Beijing 102249)Abstract£ºAccording to features of coalbed methane bearing seam and properties of CO2, the author discusses the prospect of the application of CO2 foam fracturing in the development of coalbed methane by means of making experience research on CO2 foam fracturing fluid and fracturing process discussion. The result shows that the technology of CO2 foam fracturing is a relatively ideal one for the restructuring of the coalbed methane reservoir. However, because of reasons such as the foam temperature (over 40 ¡æ) and implementation costs, its application in low-temperature seam and low output will be constrained.
Keywords: coalbed methane; CO2 foam fracturing; adaptability
Discussion of the Feasibility of the Coal Seam Restructuring with CO2 Enhanced Recovery Technology
Li Yukui, Wu Peifang, Gao Haibin and He Yuandong
(Zhongyuan Oil Field Branch, Puyang, Henan 457164)Abstract: This paper introduces the principle of CH4 desorption in the coal seam and basic features of CO2. In light of the support and implementation capacity of China's current equipment, it proposes the feasibility of the utilization of CO2 huff & puff, CO2 enhanced fracturing and CO2 foam fracturing. According to the current restructuring in our country's coal seams, it further clarifies the importance of making enhanced restructuring of coal seams by the use of CO2 foam fracturing. It suggests that a special topic research should be performed over the coal seam restructuring with the technology of CO2 foam fracturing in order to increase the recovery of coalbed methane.
Keywords: coalbed methane; CO2 Foam Fracturing; feasibility
Current Comprehensive Utilization and Prospect of Coalbed Methane in Huainan Coal Mining Area
Jin Xueyu
(Gas Utilization Branch, Huainan Mining Group, Huainan, Anhui 232001 )Abstract: Huainan coalfied is rich in coalbed methane resources and has large-scale coalmine methane drainage Huainan Mining Group will be aimed to make comprehensive utilization of drained coalmine methane and ventilation air methane as green energy resources. It is planned to turn the wasted into the treasured and reduce the atmosphere pollution to finally realize the jointly development of two resources and energy. This paper systematically discusses the preconditions of the comprehensive utilization of coalmine methane in Huainan coal mining area, its absolute amount of coalmine methane liberation and current comprehensive utilization situations. It also presents a clear vision of the prospect of the future utilization.
Keywords: coalbed methane storage; coalmine methane drainage; ventilation air methane; comprehensive utilization
CBM Resources and Drainage Technologies in Huaibei Coalfield
Fan Jingkun
(Huabei Coal Mining Group Co., Huaibei, Anhui 235006)Abstract: Huaibei Coalfield is located in the inland area of Eastern China, where overall, energy is relatively insufficient. However, proved coal reserves and CBM is abundant, especially in its four synclines. CBM is a clean energy source and a hazard threatening coalmines' safe workings. In order to utilize CBM a drainage technology may be adopted before a coalface is worked with movable CBM pumps directed along the seams. This method needs limited investment and gains immediate economic and safety rewards; and eventually it will make contributions to the gas hazards towards mining activities and its economic performance.
Keywords: Huaibei mining area; CMM; drainage technology
The Prospect Analysis of the Development and Utilization of Coalbed Methane in Liaoning
Wang Wangui1 and Cao Ligang2
( 1. Northeast Coalfield Geological Exploration Design Research Institute, Shenyang 110011; 2. Shenyang Coalbed Methane Development and Research Centre, Shenyang 110011)Abstract: The coalbed methane resource in Liaoning has the feature of "small but rich". In detail, the amount of coalbed methane resource is relatively small but the coalbed methane stored in unit area is rich with high density and relatively good permeability. Therefore, it is suitable for surface development. This paper discusses the advantages, current development and utilization, prospect and suggestions of the coalbed methane resource in Liaoning
Keywords: coalbed methane; prospect of the development and utilization ; suggestion
CBM Power GenerationTechnology and Current Challenges in China
Guo Juanyan, Jiang Dongxiang and Zhao Gang
£¨Department of Thermal Engineering, Tsinghua University, Beijing 100084£©Abstract: Using coalmine methane to generate electricity is one of the best ways to utilize CBM resources. There are some choices for a CBM power plant, such as gas engine, gas turbine, micro-turbine and IC engine. Different plant adapts for different project. Some CBM power generation technologies are first introduced in the paper. Then, its advantage and disadvantage are also discussed. After that, some CBM power generation projects in the world are reviewed in the paper. At last, problems in developing coalmine methane power project in China are discussed.
Keywords: coalmine methane; power plant; power project
Introduction of the VOCSIDIZER Technology in Power Generation Utilizing VAM
Richard Mattus
( MEGTEC System, Sweden )Abstract: VOCSIDIZER technology developed by MEGTEC is introduced to recovery and utilize ventilation air methane ( VAM ) as a kind of energy to generate heat or electric power. And its successful application in some coalmine in UK and Australia shows its great potential and perspective to be transferred to Chinese coalmines.
Keywords: Ventilation air methane ( VAM ); recovery and utilize; power generation with gas
