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压力对原油裂解成气影响的对比模拟实验 被引量:3
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作者 陈中红 张守春 查明 《中国石油大学学报(自然科学版)》 EI CAS CSCD 北大核心 2012年第6期19-25,共7页
通过在不同的实验体系(常压和20 MPa)进行的原油裂解成气模拟实验,对原油裂解成气过程和裂解气产率进行研究。结果表明:低速率长时升温相对高速率短时升温对原油裂解成气更有利;压力对原油裂解有抑制或延迟作用,压力条件下原油初始裂解... 通过在不同的实验体系(常压和20 MPa)进行的原油裂解成气模拟实验,对原油裂解成气过程和裂解气产率进行研究。结果表明:低速率长时升温相对高速率短时升温对原油裂解成气更有利;压力对原油裂解有抑制或延迟作用,压力条件下原油初始裂解时间滞后,原油裂解温度门限较高;压力可能抑制了重烃气C2-5向甲烷的二次裂解,20MPa下在高温阶(600~650℃)较常压有显著高的C2-5产率和低的干燥系数;加压环境下水参与了原油裂解反应,加压水体环境下原油转化率降低而总产气率、重烃气C2-5产率和二氧化碳产率升高;二氧化碳和重烃气C2-5质量产率变化规律和形成机制比较接近;总裂解气主生气期在425~650℃,对应Ro约为1.5%~2.4%。 展开更多
关键词 原油裂解 裂解气 压力 天然气产率 生烃模拟实验
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Experimental study on effects of CBM temperature-rising desorption 被引量:2
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作者 MA Dong-min LIN Ya-bing 《Journal of Coal Science & Engineering(China)》 2012年第4期350-354,共5页
To study the effects of CBM (coal bed methane) temperature-rising desorption, isothermal adsorption/desorption experiments on three ranks (anthracite, coking coal and lignite) of coal at different temperatures wer... To study the effects of CBM (coal bed methane) temperature-rising desorption, isothermal adsorption/desorption experiments on three ranks (anthracite, coking coal and lignite) of coal at different temperatures were designed based on the traditional CBM decompression desorption. The experimental results indicate that temperature-rising desorption is more effec- tive in high-rank coal, and ever-increasing temperature of high-rank coal reservoir can reduce the negative effects of coal ma- trix shrinkage in the process of production and improve the permeability of the coal reservoir as well. It is also revealed that the technique of temperature-rising desorption applied in higher-rank coal reservoir can enhance CBM recovery ratio. This study provided theoretical support for the application of temperature-rising desorption technique in practical discharging and mining projects, which can effectively tackle the gas production bottleneck problem. 展开更多
关键词 temperature-rising desorption CBM recovery ratio CBM production high-rank coal reservoir
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Optimizing the drilled well patterns for CBM recovery via numerical simulations and data envelopment analysis 被引量:2
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作者 Luo Jinhui Yang Yongguo Chen Yuhua 《International Journal of Mining Science and Technology》 2012年第4期503-507,共5页
Coalbed methane(CBM) commercial development requires choosing the arrangement of the wells.This should be done by considering the corresponding input-output(investment-profit) efficiencies.Simulations were obtained fr... Coalbed methane(CBM) commercial development requires choosing the arrangement of the wells.This should be done by considering the corresponding input-output(investment-profit) efficiencies.Simulations were obtained from the computer modeling group(CMG) given the reservoir conditions of the Panzhuang block in the southern part of the Qinshui Basin.This is a demonstration region for CBM development located in Shanxi province of northern China.The sensitivity of gas production from a single vertical well to the primary reservoir parameters was estimated first.Then multi-well gas production from three different well patterns was simulated to estimate the most appropriate well spacing.Combining the investment requirements then gave investment-profit efficiencies for these well patterns.A data envelopment analysis(DEA) model was used to optimize the efficiency.The results show that the permeability,the reservoir pressure,and the gas content have an evident impact on single well gas production.The desorption time has little or no affect on production.The equilateral triangular well pattern(ETWP) in a 400 m well spacing is,for multi-well development,the optimal pattern.It has a better input-output ratio,a longer stable yield time,and provides for greater CBM recovery than does either the rectangular well pattern(RWP) or the five point well pattern(FPWP). 展开更多
关键词 OptimizationWell patternCBMVertical surface drillingNumerical simulationDEA
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