Optimization of Coalbed Methane Well Type Based on Osculating Value Method
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摘要: 针对目前常用的多目标决策方法多存在缺点的现状,进行了密切值法在煤层气井井型优选中的应用研究。对国内外煤层气井常用的射孔压裂直井、U形水平井、V形水平井和羽状水平井4种井型,以数值模拟为手段,利用Eclipse软件进行了产能预测,并在此基础上进行了经济评价,然后综合考虑累计产气量、净现值、投资回收期、内部收益率和钻井风险系数等5项评价指标,应用密切值法优选了延川南区块煤层气井井型。产能预测和经济评价结果表明,该区块羽状水平井优势明显,15年累计产气量达5.058×108 m3,高于其他井型;净现值1.21亿元,是其他井型的5~11倍;投资回收期3.96年,约为其他井型的1/3;内部收益率0.28,约为其他井型的2倍。据此进行密切值法评价,结果显示该区块4种井型方案从优到劣的排序为羽状水平井、U形水平井、射孔压裂直井和V形水平井。Abstract: In view of the deficiencies in multi-objective decision methods,the application of osculating value method in CBM well type optimization was investigated.Focusing on the commonly used well types at home and abroad:perforated and fractured vertical well,U-shape horizontal well,V-shape horizontal well,and pinnate horizontal well,Eclipse software was employed to predict CBM production of every well type in this paper.Meanwhile economic evaluation taking five evaluation indexes into comprehensive account:accumulated gas production,net present value,invest recovery period,internal rate of return and risk coefficient in the process of CBM well drilling,was conducted.Osculating value method was used to optimize CBM well types for Yanchuannan Block for the first time.The research results showed that pinnate horizontal well had obvious advantages in developing CBM,with the cumulative production in 15 years of 505.8 million cubic meters which was higher than other well types;net present value of the pinnate horizontal well was 121 million RMB,which was 5-11 times other well types;investment recovery period was 3.96 years,which was about 1/3 of other well types;internal rate of return was 0.28,which was about 2 times of other well types.Osculating value method evaluation results showed that the four well types schemes of this block in the order of descending superiority were pinnate horizontal well,U-shape horizontal well,perforated and fractured vertical well,V-shape horizontal well.
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Keywords:
- osculating value method /
- coal bed methane /
- development well /
- well type /
- production forecast /
- economic benefit
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[1] Wang Zhiming,Zhang Jian.Critical thickness of a low permeable coal bed for horizontal well production in China[J].Energy Sources:Part A:Recovery,Utilization,and Environmental Effects,2010,33(4):307-316.
[2] Ian Palmer.Coalbed methane completions:a world view[J].International Journal of Coal Geology,2010,82(3):184-195.
[3] 安永生,陈勇光,吴晓东.煤层气压裂直井与多分支井经济评价对比研究[J].石油钻采工艺,2011,33(5) :97-100. An Yongsheng,Chen Yongguang,Wu Xiaodong,et al.Contrastive study on economic evaluation of fractured vertical well and multi-lateral well for coal bed methane reservoir[J].Oil Drilling Production Technology,2011,33(5):97-100. [4] 付利,申瑞臣,乔磊,等.煤层气开采井组合方案设计与分析[J].石油钻探技术,2012,40(2):87-92. Fu Li,Shen Ruichen,Qiao Lei,et al.The design and analysis of the scheme for well patterns to produce coalbed methane[J].Petroleum Drilling Techniques,2012,40(2):87-92. [5] 杨红斌,冯松林,居迎军,等.油井合理井底流压综合判定方法[J].石油钻探技术,2012,40(1):103-108. Yang Hongbin,Feng songlin,Ju Yingjun,et al.Integrated evaluation approach of reasonable bottom-hole flowing pressure of oil wells[J].Petroleum Drilling Techniques,2012,40(1):103-108. [6] 闫相祯,王伟章,陈宗毅,等.基于专家系统的高压充填防砂方案智能设计[J].石油钻探技术,2008,36(2):67-71. Yan Xiangzhen,Wang Weizhang,Chen Zongyi,et al.High pressure gravel packing and sand control intelligent design based on expert system[J].Petroleum Drilling Techniques,2008,36(2):67-71. [7] 于德水.萨北油田曲流型河道砂体建筑结构研究[J].断块油气田,2011,18(1):30-33. Yu Deshui.Study on architecture of meander channel sandbody in Sabei Oilfield[J].Fault-Block Oil Gas Field,2011,18(1): 30-33. [8] 王松,杨兆中,李小刚.分层压裂工艺优选的模糊综合评判方法[J].断块油气田,2009,16(5):90-93. Wang Song,Yang Zhaozhong,Li Xiaogang.Fuzzy comprehensive evaluation method for optimization of separate layer fracturing technology[J].Fault-Block Oil Gas Field,2009,16(5):90-93. [9] 曾国熙,梁川,裴源生.土壤质量排序和分类研究中密切值法的应用[J].东北水利水电,2004,22(2):39-41. Zeng Guoxi,Liang Chuan,Pei Yuansheng.Application of osculating value method for prior order and classification of soil quality[J].Journal of Water Resources Hydropower of Northeast China,2004,22(2):39-41. [10] 费忠华.金刚石钻头优选的密切值模型及其应用[J].华东地质学院学报,1997,20(3):297-299. Fei Zhonghua.Osculation value model for diamond bit optimal selection and its application[J].Journal of East China Geological Institute,1997,20(3):297-299. [11] 罗东坤,褚王涛,吴晓东,等.煤层气钻井技术的经济性分析[J].石油勘探与开发,2009,36(3):403-407. Luo Dongkun,Chu Wangtao,Wu Xiaodong,et al.Analysis on economic benefits of coalbed methane drilling technologies[J].Petroleum Exploration and Development,2009,36(3):403-407. [12] 路艳霞,张飞燕,吴英,等.延川南地区煤层气资源潜力分析[J].中国煤层气,2011,8(4):13-17. Lu Yanxia,Zhang Feiyan,Wu Ying,et al.Analysis of potentials of CBM resources in Yanchuannan Region[J].China Coalbed Methane,2011,8(4):13-17. [13] 陈玉华.基于DEA的煤层气经济评价模型研究.中国矿业大学资源学院,2010. Chen Yuhua.Study on the coalbed methane economic evaluation model based on DEA.China University of Mining and Technology,Resources Institute,2010. [14] 罗东坤,吴晓东,张宝生.中国煤层气资源技术经济评价[M].北京:煤炭工业出版社,2010:95-102. Luo Dongkun,Wu Xiaodong,Zhang Baosheng.Technical and economic evaluation of coal bed gas resources in China[M].Beijing:Coal Industry Press,2010:95-102. [15] 崔树清,王风锐,刘顺良,等.沁水盆地南部高阶煤层多分支水平井钻井工艺[J].天然气工业,2011,31(11):18-21. Cui Shuqing,Wang Fengrui,Liu Shunliang,et al.Multi-branch horizontal well drilling in the southern Qinshui Basin with high-rank coal beds[J].Natural Gas Industy,2011,31(11):18-21.
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