Tectonic Evolution And The Characteristics And Forming Of The Fuling Regional

The southeast Sichuan Fuling block large pool of stem structure gas field inthe east, west of the large the Tianchi structure gas field, geological structurebelongs to the eastern Sichuan fold belt-Wanxian Synclinorium, reef dam toGoujia field to the echelon Huangnitang anticline with structure NE directionextending complex structural form. In this paper, the theory and methods ofstructural geology, seismic data, starting from the structural characteristicssoutheast of Sichuan Basin Fuling District Silurian-Triassic key explorationtarget layer structure and fracture characteristics, tectonic evolution detailedpalaeogeomorphology research. Through research, the following results wereobtained and understanding.(1) seismic synthetic seismogram calibration, interpretation of the Siluriansystem under the bottom boundary the (Chi bottom), stacked under the ECbottom boundary (end-Permian), the bottom boundary of Upper Permian (UpperPermian bottom), Upper Permian Changxing Formation in the bottom boundary(L bottom), Triassic Feixianguan Formation in the bottom boundary (fly bottom),Triassic Feixianguan Formation four bottom boundary (fly bottom) UpperTriassic to home Hedi sector (subject to the bottom),8the Jurassic LowerZILIUJING the bottom boundary of the reflective layer, studies have shown that,from the bottom reflective layer reflected wave energy intensity change is notvery large, often show before phase energy strong and continuous, after the phaseof reflected energy is relatively weak. Required at the end of the western part ofthe reflective layer measurement area is a strong phase in other places as twostrong phase change of the strength of the reflected energy is not continuous. Thereflective layer at the bottom of long reflected wave energy intensity change isnot too large. Upper Permian bottom reflective layer performance of a singlestrong phase, reflectance characteristics of stability, continuity. Lower Permianbottom reflective layer is generally Crest reflection, reflection characteristics more stable, better continuity. Chi bottom reflective layer performance of a singlestrong phase, reflectance characteristics of stability, continuity, no significant changethroughout the region.(2) other current structural form in good agreement in the Triassic Xujiahe before,was the NE-SW trending syncline overview, less fault development, south east andnorth-west to the different degrees of uplift work area The basic structural low.Triassic family the River group structure morphogenesis significant change in themiddle of the study area is still the structural low, but the structural form graduallytowards Nancy divergence form of relief, the fracture more developed, showing a NW-SE direction, before the Triassic NE-SW direction is significantly different.(3) structural history of tectonic deformation in North West-South East, has notyet formed prior to the deposition of the Permian Longtan fold fault structure, thewidespread occurrence of tectonic deformation in the Permian, the tectonicdeformation occurs later, constructed The main factor influencing the Yanshanmovement affect the formation of the Himalayan movement. Overall, weak tectonicdeformation in the NE-SW direction the strata are stable, today the structural formslightly North East, Nancy terrain features.(4) The method of mold recovery palaeogeomorphology studies have shown thatbefore the Mesozoic sedimentary study area is basically a slightly North East, Nancyancient geomorphological features, but local undulating changes showed varyingdegrees. The different periods palaeogeomorphology studies have shown that thebefore the Permian palaeogeomorphology has a good inheritance, relatively highterrain of eastern North in turn to Nancy Southern reduce the, local undulating form ascale ranging from ancient uplift and ancient depressions. However, before theTriassic, palaeogeomorphology obvious Alice Pour change of, Nancy higher andlower North East palaeogeomorphology. The combination of structural characteristicsand tectonic evolution of studies have shown that ancient landscape significantlyaffected by the tectonic evolution of the control, in the late Mesozoic, Sichuan Basinbegan constructing significant deformation, resulting in ancient geography haschanged.