CAJ | 학술논문

利用分形理论研究了大庆徐家围子地区火山岩地层可钻性的评价方法.根据现场声波测井资料及岩心资料,通过室内实验和回归分析建立了声波测井资料与地层可钻性解释模型,结合变尺度分析法分析了该地区声波测井资料的分形特征及长程相关性.依据传统一维、二维随机中点分形插值理论,提出了加权改进随机中点插值法,并结合地层对比技术及深度归一化方法,构建了声波时差测井参数分布场,根据已建立的可钻性解释模型得到地层可钻性分布场.研究结果表明:声波测井资料与地层可钻性之间具有相关关系,且具有很好的分形特征及长程相关性.分形理论可以定量确定地层可钻性分布场.该方法精度高,推广能力强,预测结果符合实际地层变化规律.
이용분형이론연구료대경서가위자지구화산암지층가찬성적평개방법.근거현장성파측정자료급암심자료,통과실내실험화회귀분석건립료성파측정자료여지층가찬성해석모형,결합변척도분석법분석료해지구성파측정자료적분형특정급장정상관성.의거전통일유、이유수궤중점분형삽치이론,제출료가권개진수궤중점삽치법,병결합지층대비기술급심도귀일화방법,구건료성파시차측정삼수분포장,근거이건립적가찬성해석모형득도지층가찬성분포장.연구결과표명:성파측정자료여지층가찬성지간구유상관관계,차구유흔호적분형특정급장정상관성.분형이론가이정량학정지층가찬성분포장.해방법정도고,추엄능력강,예측결과부합실제지층변화규률.
The prediction of rock drillability is important for drilling and exploring engineer.In order to improve the accuracy of formation drillability,a new method for simulating the distribution of drillability field was discussed according to fractal theory,and the new method has been applied in the volcanic rock formation in Xujiaweizi.In general,the formation drillability is calculated based on well acoustic logging after the well completion.Using the well acoustic logging date and indoor experiments of drillability,a mathematic model for describing the relationship between the well acoustic logging and the formation drillability was established by regression analysis.Because the well acoustic logging had a fractal character with long range correlations by R/S analysis,a method of fractal interpolation was proposed to construct the distribution field of well acoustic logging.Random mid-point fractal interpolation method is one of the most popular methods.This method assumes that wells stand at the edge-corner point of the square.However,this situation always does not exist,so a weighted function with random mid-point fractal interpolation method has been put forward.Combining techniques of continental strata correlation and depth-normalization,the improved fractal interpolation method gets an accurate distribution field of well acoustic logging and drillability.The practice shows that fractal theory can successful reflect the macroscopic trend and microscopic heterogeneity of rock formation.Compared with the results of traditional methods,it can offer more reasonable explanation to the change of rock formation and higher prediction accuracy and excellent generalization