Fault related folds and fractures, which always improve reservoirs and trap capacity, especially in the oil and gas fields in western China, are of extreme importance for oil and gas exploration. Based on four assumpt...Fault related folds and fractures, which always improve reservoirs and trap capacity, especially in the oil and gas fields in western China, are of extreme importance for oil and gas exploration. Based on four assumptions and fault related fold theory, we propose four conceptual models for fracturing in fault related folds, i.e., a simple-step parallel fault bend anticline, a simple-step parallel fault propagation anticline, a multiple-bend fault-bend fold and a break-forward imbricate. Fracture conditions depend on structural evolution and specific site conditions. A case study of the Kulongshan Anticline in the Jiuquan Basin shows that our conceptual models match reality data very well.展开更多
Accurate interpretation of clutter seismic reflection is of great significance to make clear the structural geometry and kinematics characteristics.Based on field investigations,boreholes and seismic data,forward mode...Accurate interpretation of clutter seismic reflection is of great significance to make clear the structural geometry and kinematics characteristics.Based on field investigations,boreholes and seismic data,forward modeling is carried out under the trishear model of fault-propagated fold principle,and the activity characteristics of the main faults in the study area are quantitatively analyzed using the balanced restoration technique,which may provide important indication for the potential petroleum exploration and development.The results show that separated by Tuziluoke and Tugerming fault,the structural style of the study area can be divided into the deeply buried forelimb,the kink band and the tiny anticline backlimb section.The Tuziluoke fault has been active with strong intensity since the sedimentary period of the Kuqa Formation and,which controls the formation of the growth strata in the deep buried forelimb of the Tuziluoke anticline.The Tugerming fault has been active intermittently since the end of the Jurassic,causing the strata denudation of the Late Jurassic to Paleogene in varying degrees and the development of series of regulating faults.The multi-stage tectonic activities caused the structural high of the anticline migrated from east to west.展开更多
基金the Y.C. Tang Disciplinary Development Fund of Zhejiang University for financial support
文摘Fault related folds and fractures, which always improve reservoirs and trap capacity, especially in the oil and gas fields in western China, are of extreme importance for oil and gas exploration. Based on four assumptions and fault related fold theory, we propose four conceptual models for fracturing in fault related folds, i.e., a simple-step parallel fault bend anticline, a simple-step parallel fault propagation anticline, a multiple-bend fault-bend fold and a break-forward imbricate. Fracture conditions depend on structural evolution and specific site conditions. A case study of the Kulongshan Anticline in the Jiuquan Basin shows that our conceptual models match reality data very well.
基金The work was supported by the National Natural Science Foundation of China(No.U19B6003-01),National Oil and Gas Major Project(2016ZX05003-002)PetroChina Science Research and Technology Development Project(No.2019B-0504).
文摘Accurate interpretation of clutter seismic reflection is of great significance to make clear the structural geometry and kinematics characteristics.Based on field investigations,boreholes and seismic data,forward modeling is carried out under the trishear model of fault-propagated fold principle,and the activity characteristics of the main faults in the study area are quantitatively analyzed using the balanced restoration technique,which may provide important indication for the potential petroleum exploration and development.The results show that separated by Tuziluoke and Tugerming fault,the structural style of the study area can be divided into the deeply buried forelimb,the kink band and the tiny anticline backlimb section.The Tuziluoke fault has been active with strong intensity since the sedimentary period of the Kuqa Formation and,which controls the formation of the growth strata in the deep buried forelimb of the Tuziluoke anticline.The Tugerming fault has been active intermittently since the end of the Jurassic,causing the strata denudation of the Late Jurassic to Paleogene in varying degrees and the development of series of regulating faults.The multi-stage tectonic activities caused the structural high of the anticline migrated from east to west.
