Structural Characteristics And Reservoir Prediction Of The Eastern Qiulitage Structural Belt In Korla Foreland Basin

Qiulitage structural belt is located in the south of Korla depression,belonging to the Korla foreland thrust system,with an exploration area of 5200 square kilometers.It is an important successor field for oil and gas exploration in Korla.According to the differences in structural style and oil and gas exploration characteristics,Qiulitage structural belt can be divided into two major sections-the Xiqiu Section and the Dongqiu Section.The Zhongqiu-Dongqiu tectonic belt is close to the Kelasu area,which is a tectonic development area.The breakthrough of Well QZ1 has opened the prelude of Qiulitage exploration,making it an important strategic replacement field for increasing reserves and production in Tarim Oilfield,with huge exploration potential.However,due to the extremely complex structure and velocity characteristics of the Qiulitage structural belt,many problems were encountered in the early exploration.Due to the relatively low degree of exploration,the structural relationship between the Zhongqiu-Dongqiu segment and the Xiqiu-Keshen structural belts was unclear,resulting in unclear structural and reservoir formation characteristics in the eastern section of the Xiqiu to the western section of the Dongqiu period,which to some extent became an important factor restricting the oil and gas exploration in Dongqiu.This paper relies on the overall evaluation of new and old data,carries out section splicing and sorting,reunderstands the regional structure and combs the structural characteristics of the Zhongqiu-Dongqiu-Keshen Triangle Zone and the transformation characteristics of the fault zone.Based on the understanding of the regional structure,it relies on the continuous data of the Dongqiu-Zhongqiu to carry out the structural trap settlement,and conducts the research on lithologic traps by extracting multiple attributes,inversion and other geophysical methods.Through the above research,the regional structure relationship of Keshen-Zhongqiu-Dongqiu has been clarified,the structural characteristics of Qiulitage structural belt have been implemented,the comprehensive evaluation of multiple target layers and zones,and the optimization of key targets have further expanded the achievements of QZ1 exploration,supporting the comprehensive breakthrough of Qiulitage structural belt.