晋城成庄煤层气探明储量估算及经济评价

The estimation and economic assessment of the proved reserves of coalbed methane in Chengzhuang block in Jincheng

在划定储量计算单元的基础上,采用体积法对晋城成庄区块3号、9号、15号煤层的煤层气探明储量进行了估算,结果为66.36×108 m3,显示成庄区块属于浅—中层、低产、中丰度的中型气田。为论证成庄区块煤层气开发的经济性,编制了煤层气储量经济评价程序,设计出煤层气开发方案,并进行了经济评估。结果表明:设计煤层气开发区动用储量为21.19×108 m3,其中,经济可采储量为15.75×108 m3,剩余储量为5.44×108 m3;经评价各项经济指标良好,财务内部收益率为22.2%,高于天然气行业基准收益率,盈亏平衡点低,动态投资回收期7.82 a(低于8 a),地面煤层气开发经济可行。

In order to demonstrate the reserve scale and economic benefit of coalbed methane（CBM） in Chengzhuang in Jincheng, the proved reserves of this block is estimated, and on the basis of a preliminary CBM development plan an economic assessment program was established by Excel according to the regulation of economic assessment for oil and gas reserves （SY/T 5838-93）. The financial assessment on the reserves was carried out and analysis on uncertainty factors and sensitivity for the assessment result were made. The result shows that the CBM proved reserves in Chengzhuang block are 66.36×10^8m^3, is a medium gas field with shallow-medium depth, low productivity and medium resource abundance. In addition, the development plan employs the reserves of 21.19×10^8m^3, economic recoverable reserves of 15.75×10^8m^3 and residual reserves of 5.44×10^8m^3. The predicted development economic indexes of the Chengzhuang block are better, the financial internal rate of return is 22.2%, higher than the base earning rate of the natural gas industry, the breakeven point also is lower, and dynamic investment payback period is less than 8 years. Through the preliminary economic analysis, it is considered that the surface CBM development in the Chengzhuang block is economically feasible.