煤层气“甜点”测井判别与产量预测——以沁水盆地柿庄南区块为例

发布时间：2018-03-05 20:23

本文选题：沁水盆地　切入点：柿庄南区块　出处：《新疆石油地质》2017年04期 　论文类型：期刊论文

【摘要】：针对煤层气"甜点"判别与产量预测难的问题,提出了一种利用常规测井曲线评价煤层气"甜点"和产量预测的方法。以沁水盆地柿庄南区块3号煤层为研究对象,从煤层气单井平均日产气量入手,探讨不同单井平均日产气量煤层的敏感测井响应特征,利用井径、自然电位、自然伽马、深侧向电阻率和密度测井曲线,计算煤体结构指数、产能指数、含气量、含气饱和度、临界解吸压力及顶底板特性等煤层关键参数。综合煤体结构指数与产能指数构建了煤层品质参数,结合含气量、临界解吸压力与顶底板特性建立了柿庄南区块煤层气"甜点"测井判别标准;并利用煤层含气量、含气饱和度与产量刻度系数预测产气量,应用该方法处理解释研究区97口煤层气井,预测准确率达84%.
[Abstract]:In view of the difficult problem of "dessert" discrimination and production prediction of coalbed methane, a method for evaluating "dessert" and yield prediction of coalbed methane by using conventional logging curves is proposed. The coal seam No. 3 in Shizhuangnan Block, Qinshui Basin, is taken as the research object. Based on the average daily gas production of single well of coalbed methane, the characteristics of sensitive logging response of coal seam with average daily gas production of different single well are discussed. The coal structure index is calculated by using well diameter, natural potential, natural gamma, deep lateral resistivity and density logging curve. The key parameters of coal seam, such as productivity index, gas content, gas saturation, critical desorption pressure and characteristics of roof and floor, are used to construct coal seam quality parameters, combined with gas content, combined with coal body structure index and productivity index. The critical desorption pressure and the characteristics of top and bottom plate set up the criteria of "dessert" logging for coalbed methane in Shizhuangnan block, and used the gas content of coal seam, gas saturation and production calibration coefficient to predict gas production. The method is used to deal with 97 coalbed methane wells in the interpretation and study area, and the prediction accuracy is 84%.
【作者单位】：中海油研究总院;中国石油大学地球科学与技术学院;
【基金】：国家科技重大专项(2011ZX05025-001)
【分类号】：P618.13;P631.81

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