【作者】 王俊；

【导师】 唐华风； 赵宏权；

【作者基本信息】 吉林大学 ， 地质工程， 2012， 硕士

【摘要】 随着大庆油田天然气勘探开发的不断深入，二氧化碳气层的准确识别与精细评价对于求取储层产能和判断气水层显得格外重要。但是，二氧化碳气受检测来源及检测手段较单一等环境因素的制约，无法对二氧化碳气检测值进行更精细的评价，出现了二氧化碳气检测值与储层产能不匹配、气层识别与评价难等情况，地质录井解释效果不甚理想。因此，寻求更有效的储层二氧化碳气识别与评价方法，准确排除现有钻井液体系的影响以及在综合解释中的评价方法是地质录井技术发展的必然趋势，也是大庆油田勘探形势发展的客观需求。本文首先全面分析了大庆探区松辽盆地二氧化碳在纵向及平面上的分布特征，并深入研究了二氧化碳检测分析的主要手段：热导式分析仪和红外线吸收式分析仪检测原理；其次，通过分析二氧化碳进入钻井液的形式，研究了二氧化碳检测值环境影响因素校正方法；再次，通过综合录井与测井技术手段，建立了求取储层含气性参数以及孔隙度物性参数的方法；最后，通过录井资料、实验数据和二氧化碳气物理化学性质分析，建立一套能够区别显示真假、确定显示厚度、二氧化碳气相对含量的识别方法。利用二氧化碳气检测值校正结合实验数据、测井资料、试油资料，求取有效评价参数，建立二氧化碳气显示幅度与产能匹配和二氧化碳气层解释评价方法。本文通过与生产紧密结合，在生产实验中见到较好的效果，实现了储层中二氧化碳气与烃类气体相对含量判别方法，符合率达90.9%，完成了二氧化碳气层解释图版，老井回判解释符合率大于90.0%，二氧化碳气层录井识别与评价方法研究在深层天然气勘探领域具有广阔的应用前景。更多还原

【Abstract】 Along with deeply exploration and development of the nature gas in Daqing oil field, theexactly recognizing and delicately estimating of the CO₂gas layer is very important fordetermining the reservoir’s output and judging the gas-water layer. However, the detectedresult of CO₂can not be judged delicately because of the undetermined source and simplemethods and other unknown factors. Though the detected result of CO₂could not match thereservoir’s output, and the recognition and judgment of the CO₂gas layer become moredifficultly, and the logging integration is very unideal. Therefore, the inevitable developingtrends of the geological log is that seeking more useful recognizing and judging methods ofthe CO₂layer and exactly exclude the involution of the drilling fluid system and exploringmore integrated interpretation and judgment system. Also, this is very desirability for theexploration development of Daqing oil field.Firstly, our work fully analyzed the spatial distribution of the CO₂of Songliao Basin inDaqing oil field, and deeply studied the main CO₂detecting methods and the principles of thethermal conductivity analyzer and the infra-red absorption analyzer. Secondly, we studiedadjustment methods of the environment factors to the CO₂detected results, through analyzinghow the CO₂enters the drilling system. Thirdly, we built up the methods to get the reservoirgas bearing factors and porosity through the integrated logging techniques. Finally, we builtup the recognition method which can determine the truthfulness and thickness of the CO₂layer and its relative content. We built up interpretation and judgment system of the CO₂gaslayer and make its appearance according to the output based on correction of the CO₂detectedresult combined with the experimental findings, log data, oil test data and effective judgmentfactors.This work got good purposes in the practical experiments, achieved the comparison withthe CO₂and hydrocarbon gas’s relative content, and the coincidence rate is up to90.9%. Theinterpretation plate of CO₂gas layer was completed and the coincidence rate of the old wells’reinterpretation is up to90.0%. The logging recognition and judgment of the CO₂gas layer isvery perspective in the exploration field of the deep nature gas.更多还原