阳泉寺家庄井田含煤地层煤层测井密度模型和有效孔隙度计算
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摘要
在总结阳泉矿区寺家庄井田含煤地层发育特征的基础上,优选出六层可以作为煤层气开发层位的煤层进行煤岩组分分析,并提取各取样煤层所对应的测井参数,建立了自然伽马与灰分、固定碳与灰分、挥发分与视电阻率之间的线性关系。依据煤层体积可以分成固定碳、挥发分、灰分和测井液(孔隙中充满测井液)四部分,作为对测井响应的贡献之和,建立了测井密度模型用于计算煤层有效孔隙度,结果显示孔隙度测井计算结果与实测结果相差不超过10%。研究成果可用于指导煤岩工业组分分析和储层物性分析。
By summarizing the development characteristics of the coal bearing strata of Sijiazhuang Mine in Yangquan Mining Area,six coal seams were selected as coalbed methane development seam to analyze the coal petrography composition,and logging parameters corresponding to each sampling coal seam were extracted,the linear relationship between natural gamma and ash,fixed carbon and ash,volatile matter and apparent resistivity were established. According to the volume of coal seam,it can be divided into four parts: fixed carbon,volatiles,ash and logging fluid( pore filled with logging fluid). As a contribution to the logging response,a logging density model was established to calculate effective porosity of coal seams. The results show that the difference between the porosity of logging calculation and the measured results were not more than 10%.The research results can be used to guide the composition analysis and physical property analysis of coal industry.
By summarizing the development characteristics of the coal bearing strata of Sijiazhuang Mine in Yangquan Mining Area,six coal seams were selected as coalbed methane development seam to analyze the coal petrography composition,and logging parameters corresponding to each sampling coal seam were extracted,the linear relationship between natural gamma and ash,fixed carbon and ash,volatile matter and apparent resistivity were established. According to the volume of coal seam,it can be divided into four parts: fixed carbon,volatiles,ash and logging fluid( pore filled with logging fluid). As a contribution to the logging response,a logging density model was established to calculate effective porosity of coal seams. The results show that the difference between the porosity of logging calculation and the measured results were not more than 10%.The research results can be used to guide the composition analysis and physical property analysis of coal industry.
引文
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[2]杨程涛,侯玉亭,王发家.寺家庄矿掘进工作面瓦斯流量影响因素分析[J].煤,2010,19(9):51-52.
[3]栾鹏飞.寺家庄矿高瓦斯矿井煤巷掘进防突技术实践[J].煤炭与化工,2016,39(5):141-142.
[4]徐占杰,刘钦甫,宋璞,等.寺家庄井田陷落柱对煤层气井产出水地球化学特征的影响[J].煤田地质与勘探,2017,45(2):50-54.
[5]郝春生.阳泉寺家庄矿煤储层孔裂隙系统及渗透性特征[J].山西焦煤科技,2015(9):53-55.
[6]王焱.阳泉寺家庄矿太原组层序底层与瓦斯富集规律研究[D].徐州:中国矿业大学,2017.
[7]李春兰.山西省寺家庄井田含煤地层特征[J].科技资讯,2010(2):132.
[8]李霞.寺家庄矿井水文地质类型划分研究[J].山东煤炭科技,2017,(12):166-168.
[9]吴拓.利用测井曲线估算煤层灰分[J].企业技术开发,2010,29(11):41-47.
[10]向,康媛.基于Choi-Williams分布的煤田测井解释研究[J].煤炭工程,2017,49(9):114-117.
[11]张杰伟,王力.利用自然伽马曲线确定煤层粘土矿物含量[J].中国煤层气,2016,13(2):37-39.
[12]杜翔.测井方法在煤层气勘查中的应用[J].中国煤田地质,2007,19(3):63-64.
[13]朱明娜.浅谈提高煤的挥发分测定准确度的方法[J].煤炭工程,2007,39(11):58-60.
[14]孟召平,朱绍军,贾立龙,等.煤工业分析指标与测井参数的相关性及其模型[J].煤田地质与勘探,2011,39(2):1-6.
[15]汤秋林,李英.影响煤挥发分测定结果的主要因素分析[J].煤质技术,2010(5):45-46.
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