Research On Logging Evaluation Of Fault Zones Structure In Jiyang Depression

Jiyang Depression basin owns complex geological structure,which owns variety types of traps in the basin.One of the important reasons is that many fault zones existed in this basin.The multiphase fracture composite and cut each other,which caused a relatively complex fault condition and maked it hard for further exploration and development of oil and gas.Based on this reason,studing the fault zones structure of the block is of profound significance in the practical hydrycabon production.Studied the logging evaluation of the fault zones structure in Jiyang Depression would be the the main topic of this paper,which based on the fully investigated of the domestic and foreign research on the faults zones structure.Collecting data is the mainly work in the early stage.This block of the fault zones are analyzed and summarized through two espect,one is the fracture structure and the other is the response characteristics of geophysical data.In the region of rich data,the feature of the corresponding geophysical data about the fault zones structure of the related research in Jiyang Depression.The structural characteristics of the fault zones in the Jiyang Depression are analyzed from both macroscopic and microscopic aspects,which proves that the fracture zones of the study block in different lithologies all have a ternary structure,and there are differences between the internal structures of the fault zones.On the basis of sufficient investigation,the data of nearly100 wells in the block were analyzed,and the fault zones structure of the study block was divided into three categories.At the same time,it was found that the structure of the second type of fault zones is a typical three-unit structure,which is broken by sliding.The upper and lower induced crack bands are composed.According to the physical and lithological differences between different structural components of the fault zones,the log response characteristics of the three types of fault zones are analyzed and classified,and the conventional logging data identification method of the fault zones structure is obtained.Qualitative analysis of conventional logging data in the fault zones was completed by using the method of core data calibration and electrical imaging calibration.The new logging technology is used to quantify the physical property changes within the influence range of the fault zones.Based on the concept of logging properties,the applicability of different logging property analysis methods in fault zones structure identification is explored,which effectively broadens the application range of conventional logging curves in fracture structure research.According to the attribute analysis method,the parameters of wavelet analysis,spectrum analysis and integral attribute of nine logging curves are extracted.By comparing the logging attribute values of ten key well fault zones structures,the sensitive attribute parameters of the fault zones structure are realized.The preference is given,and the criteria for the classification of sensitive parameters of the fault zones for the sandstone and carbonate profiles of the study block are given.According to the analysis of the structural parameters of the fault zones,combined with the fracture parameters obtained by the electrical imaging data,the fracture zones structure division coefficient S is constructed.At the same time,combined with the actual data of this block,the fault opening and closing coefficient is combined with the dynamic logging data to construct the fault opening and closing coefficient applicable to the research block.Two-way comparative analysis with prior data,and the standard of dividing the fault band structure by double quality coefficient is obtained.To a certain extent,the research on structural logging evaluation of fault zone in Jiyang depression has been deepened.