Balanced Cross-section Appling In The Structure Research Of Hailar Basin

The hailaer basin which is in control of basement fracture is an extensional basinand formed in a regional dextral tension-shear stress field. The hailaer basin fracturetype is various, and the oringin is complex,it can be divided into the basement faultsystem, pull apart fracture system, tension-twist fault system, reverse fault systemand in all four systems. The synsedimentary fault developed considerably, butdifferent characteristics. Formed in early period faults’number (Xinganling group—Tongbomiao group) is less, long activity duration, large size; late stage,the number offaults is more activity duration,short and small scale. Nantun group, normal faultsdeveloped comparatively,Damoguaihe preiod the north-south faults started to develop.Fractures are the major controlling factors of oil and gas accumulation degreedifferences among different areas of hailaer basin.Balanced cross section technique is the forward-backward method of geologicalprofile followed the principle of geometric conservation and is an effective way ofmensurable analysis about the developing history of the structure。The correctness ofSeismic data interpreting is crucial to the result and the accuracy of reserv,irprediction,so balanced cross section is as an assisted method well constrainting themulti-resolution about Seismic interpretation, offering a new way out for quantitativestuding. With the development of technology of the computer and the combination ingeology, balanced cross section Computer simulated technology is used widely inoil and gas reservoir and geological exploration，is Standard measure criterion ofstructural properties interpretation。Balanced cross section of extrusion constructor has been widely used in orogenicstructural analysis，but in the extensional tectonic area， balanced cross section ofexamples are still rare. The project is on the basis of traditional methods such as theuse of3d seismic interpretation, and follow the basic method of basin structureanalysis, using inversion technology and method of basin, recover the geologicalstructure in sequence or phases. Through the practice of Hailaer basin Wu er xun–Beier dip section，recover basin tectonic deformation in different times to reveal themain oil layer in Hailar Basin and the tectonic evolution history. Thesis aimed atmake full use of the existing large geology, drilling, well logging testing and seismicdata，using balancing profiles restoration method and dynamic analysis， to study thebasin evolution of dynamic and analyses the development of faults and tectonic evolution characteristics. With modern petroleum geological theory as the guide,appling petroleum system theory to evaluate gas prospect in different areas, findingout the controlling factors of the hydrocarbon accumulation and differences inhydrocarbon accumulation conditions,pointing out the favorable traps and regions ofoil and gas.