Structural Analysis Of Typical Ectonics In Jingzhou Anticlinal Belt, Jiangling Sag

Jingzhou anticlinal belt is the most important oil-bearing structural belt in jiangling sag,and its resource proved rate is only 18.51%,and the exploration failed to make a breakthrough.The reasons are as follows:(1)The complexity of the structure,the role of the tectonic movement in the early tectonic reconstruction needs to be further studied.(2)It is obvious that the new tectonic movement has no research on the regularity of its complex structural development and transformation,the alteration of reservoir and the effect of redistribution.(3)The volcanic rocks are widely distributed,but the relationship between volcanic activity tectonic pattern and volcanic reservoir in different periods has not been studied deeply.(4)It is mainly distributed in Jingzhou anticlinal belt and acacia bridge syncline,However,the formation mechanism and evolution of salt structure and its relationship with tectonic pattern,fracture and oil reservoir have not been studied in depth.In addition to the above reasons,in the exploration process of oil and gas reservoir in Jingzhou anticlinal belt,it is affected by the quality of seismic data,and the implementation of local small structure is difficult,which leads to the low success rate of drilling.Using seismic data seismic structure interpretation,variable speed of each layer structure diagram,in the understanding of Jiangling sag overall structure features in different blocks and sag tectonic style,on the basis of using structural diagram and seismic profile,to detail the structural characteristics of each tectonic style,and the optimization inversion tectonics,salt structure and volcanic structure of three kinds of typical do fine resolution,analysis of structural evolution process of the structure,further verify the tectonic characteristics and genetic model.Jingzhou anticline belt have found Balingshan,Huayuan,Jingxi and Shashi oilfield,Jingzhou anticline belt is an important oil and gas secondary structural belt of Jiangling sag,develop a large number of fault,is a typical complex fault belt,with good accumulation conditions.Main develop north-east,north-north-east and north-north-west fault is given priority to,the north-north-east and north-east is the normal faults,fault stage main fault activity is Jingsha-Qianjiang,north-north-west fault mainly tinghe end of Guanghuasi compressional reverse fault.Plane by fault segmentation for six structural belt: Balingshan anticline zone in the north of the study area,the Huayuan block tectonic belt and Jingxi nose structure zone,south of Shashi anticline and Fanjiatai anticline,eastern Chianjie nose structure zone.Structural belt has high middle low on both sides of the southeast,southwest high characteristic.Based on the analysis of tectonic,trap identification and typical structure of fine resolution,found that the structural trap in the main development in fault block and fault nose and anticline structure,structure formation is associated with the development of salt structures not only,also affected by volcanic activity,study the structural traps formed in the period of Jingsha formation sedimentary period,Qianjiang fault-the town of tinghe period complicate the early tectonic,the vast majority of traps are in the late tinghe town sedimentary accumulation,Guanghuasi at the end of the main is the early reservoir damage effect,to adjust some of the early reservoir in local,and on this basis,analysis of tectonic movement and the relationship between the time of allocation.Summarizing the research achievements of the typical structure and typical structure in time and space with the oil and gas migration and accumulation of configuration relations,deduce the Jingzhou anticline belt of tectonic genesis,tectonic model and the relationship between the tectonic styles and oil-gas migration and accumulation in salt tectonic and volcanic structure effects on oil-gas accumulation depends on relations with native reservoirs on the space configuration and structure activity relationship with oil and gas migration time configuration.Therefore,the oil and gas exploration related to the typical structure of Jingzhou anticlinal belt is provided with reference to the validity of the trap in time and space configuration.