SEC储量动态评估方法在煤层气田中的应用——以鄂尔多斯盆地韩城区块为例
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摘要
目前,煤层气田的SEC储量评估均采用动态评估法,在评估过程中存在参数取值多样化、计算结果不一致等问题,为了解决这个问题,以鄂尔多斯盆地韩城区块为例,综合运用一系列与煤层气的生产特点相适应的评估方法,优化各种参数,总结递减规律。研究结果表明:根据构造和地质条件划分地质单元,在此基础上按照开发效果划分评估单元能够客观合理地分析煤层气田的递减规律;综合运用指数递减、双曲递减、调和递减等动态储量递减方法建立典型曲线,可以用来检验储量评估结果的合理性;对于一个单元进行储量评估过程中,递减率的取值要充分考虑后期增产措施的影响。
At present, all the SEC reserves evaluation of coalbed methane fields uses dynamic assessment methods.In the process of evaluation, the parameters and calculation results are various. In order to solve this problem, this paper takes the Hancheng block in Ordos basin as an example, a series of evaluation methods adapted to the production characteristics of coalbed methane have been comprehensively applied, optimizing various parameters, and summarizing the law of decline. The results show that geological units are divided according to tectonic conditions,and on this basis, evaluation units are divided according to development effect, which can objectively and reasonably analyze the law of coalbed methane field decline. A typical curve of dynamic reserves reduction, such as exponential decline, hyperbolic decline and harmonic decline, can be used to test the reasonableness of the results of reserves evaluation. For an evaluation unit, in the process of reserve evaluation, the effect of late production increase measures should be taken into full consideration when the value of decline rate is taken into account.
At present, all the SEC reserves evaluation of coalbed methane fields uses dynamic assessment methods.In the process of evaluation, the parameters and calculation results are various. In order to solve this problem, this paper takes the Hancheng block in Ordos basin as an example, a series of evaluation methods adapted to the production characteristics of coalbed methane have been comprehensively applied, optimizing various parameters, and summarizing the law of decline. The results show that geological units are divided according to tectonic conditions,and on this basis, evaluation units are divided according to development effect, which can objectively and reasonably analyze the law of coalbed methane field decline. A typical curve of dynamic reserves reduction, such as exponential decline, hyperbolic decline and harmonic decline, can be used to test the reasonableness of the results of reserves evaluation. For an evaluation unit, in the process of reserve evaluation, the effect of late production increase measures should be taken into full consideration when the value of decline rate is taken into account.
引文
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[13]王彩凤,邵先杰,孙玉波,等.中高煤阶煤层气井产量递减类型及控制因素:以晋城和韩城矿区为例[J].煤田地质与勘探,2013,41(3):23-28.WANG Caifeng,SHAO Xianjie,SUN Yubo,et al.Production decline types and their control factors in coalbed methane wells:A case from Jincheng and Hancheng mining areas[J].Coal Geology&Exploration,2013,41(3):23-28.
[14]李冰.SEC标准确定容积法储量计算参数[J].石油试验地质,2014,36(3):381-384.LI Bing.Determination of parameters for volumetric method based on SEC rules[J].Petroleum Geology&Experiment,2014,36(3):381-384.
[15]黄学斌,魏萍,郭鸣黎,等.SEC储量成本指标计算方法探讨[J].石油试验地质,2014,36(4):506-510.HUANG Xuebin,WEI Ping,GUO Mingli,et al.Discussion of cost index calculation method on SEC reserves[J].Petroleum Geology&Experiment,2014,36(4):506-510.
[2]贾承造.美国SEC油气储量评估方法[M].北京:石油工业出版社,2004.
[3]胡允栋,萧德铭,王永祥.按SEC标准进行油气证实储量评估的基本原则[J].石油学报,2004,25(2):19-20.HU Yundong,XIAO Deming,WANG Yongxiang.The principles for estimating proven reserves following SEC standards[J].Acta Petrolei Sinica,2004,25(2):19-20.
[4]张伦友,彭宽军.石油天然气储量价值评估方法研究[J].天然气勘探与开发,2005,28(3):69-72.ZHANG Lunyou,PENG Kuanjun.The research of estimation method in the reserves value of oil and gas[J].Gas Exploration and Development,2005,28(3):69-72.
[5]王树华,魏萍.SEC储量动态评估与分析[J].油气地质与采收率,2012,19(2):93-94.WANG Shuhua,WEI Ping.Dynamic evaluation of SEC reserves[J].Petroleum Geology and Recovery Efficiency,2012,19(2):93-94.
[6]李贵红.鄂尔多斯盆地东缘煤层气有利区块优选[J].煤田地质与勘探,2015,43(2):28-32.LI Guihong.Selection of the favorable coalbed methane(CBM)blocks in eastern Ordos basin[J].Coal Geology&Exploration,2015,43(2):28-32.
[7]吕玉民,汤达祯,许浩.韩城地区煤储层孔渗应力敏感性及其差异[J].煤田地质与勘探,2013,41(6):31-34.LYU Yumin,TANG Dazhen,XU Hao.Selection of the favorable coalbed methane(CBM)blocks in eastern Ordos basin[J].Coal Geology&Exploration,2013,41(6):31-34.
[8]张玲,魏萍,肖席珍.SEC储量评估特点及影响因素[J].石油与天然气地质,2011,32(2):33-34.ZHANG Ling,WEI Ping,XIAO Xizhen.Characteristics and their influential factors of SEC reserve evaluation[J].Oil&Gas Geology,2011,32(2):33-34.
[9]赵文智,毕海滨.论储量评估中的单元划分[J].石油与天然气地质,2007,28(3):309-314.ZHAO Wenzhi,BI Haibin.A discussion on the unit classification in reserve estimation[J].Oil&Gas Geology,2007,28(3):309-314.
[10]张付兴.SEC剩余经济可采储量影响因素分析[J].油气地质与采收率,2013,20(3):93-94.ZHANG Fuxing.Influencing factors analysis of SEC reserves[J].Petroleum Geology and Recovery Efficiency,2013,20(3):93-94.
[11]喻秋兰,唐海,吕栋梁,等.气井产能递减规律研究[J].天然气勘探与开发,2012,35(5):41-52.YU Qiulan,TANG Hai,LYU Dongliang,et al.Productivity decline law of gas well[J].Natural Gas Exploration&Development,2012,35(5):41-52.
[12]王永祥,张君峰,毕海滨,等.油气储量评估方法[M].北京:石油工业出版社,2012.
[13]王彩凤,邵先杰,孙玉波,等.中高煤阶煤层气井产量递减类型及控制因素:以晋城和韩城矿区为例[J].煤田地质与勘探,2013,41(3):23-28.WANG Caifeng,SHAO Xianjie,SUN Yubo,et al.Production decline types and their control factors in coalbed methane wells:A case from Jincheng and Hancheng mining areas[J].Coal Geology&Exploration,2013,41(3):23-28.
[14]李冰.SEC标准确定容积法储量计算参数[J].石油试验地质,2014,36(3):381-384.LI Bing.Determination of parameters for volumetric method based on SEC rules[J].Petroleum Geology&Experiment,2014,36(3):381-384.
[15]黄学斌,魏萍,郭鸣黎,等.SEC储量成本指标计算方法探讨[J].石油试验地质,2014,36(4):506-510.HUANG Xuebin,WEI Ping,GUO Mingli,et al.Discussion of cost index calculation method on SEC reserves[J].Petroleum Geology&Experiment,2014,36(4):506-510.