| Seismic technology has been widely used in oil exploration, it is one of the important ways of gas exploration. Since the1970s,3-D seismic had been used in commercial application for the first time,seismic technology has made great progress, and finished the simulation to the digital, seismic from2-D to3-D, from common3-D seismic to high resolution3-D seismic,and3-D to4-D seismic. Some basin3-D seismic work area has been close to or can achieve fully covered the scale of the basin, such as domestic jiyang sag, nanpu, etc. the3-D seismic data covered with large area, reflect the objective sedimentary bodies of three dimensional form and macro formation touch each other relations and continuous tracking and other characteristics, and offer scientific basis to establish basin the s stratigraphic framework.Seismic record can indirectly reflect and invert the primary sedimentary environment of geologic record. With the development of modern seismic technology, the information of lithology, lithofacies, geometric shape and the internal structure of sedimentation and sedimentary petrology can be further obtained from seismic record. Due to the background factors such as different landscape and resource, which control the development of sedimentary system, it is important for the study of reservoir and sand distribution to restore the factors accurately. In addition, the technology of seismic properties analysis can quantitatively describe sedimentary volume, lithology and so on. This is theoretical basis and prerequisite of seismic sedimentology, which use seismic exploration technology in sedimentary study, and combine with sedimentology.Junggar basin is complex and compress OGB dating from late Paleozoic to new generation, and is part of the Eurasian plate according the regional tectonic position, membership of Kazakhstan old plates, neighbor of Siberia plate in the north, Kazakhstan plate in the west and Karim plate in the south. Basin goes through haixi, yinzhi, yanshan and Himalayan phase4of sedimentary spinning, and now being thick in the south and thin in the north, tilts to the south. With the development of the carboniferous and Permian, the Triassic, Jurassic, and cretaceous tertiary and fourth department, sedimentary thickness is more than14km, this basin develops into a large OGB with multiple hydrocarbon generation and storage. The heave of Baijiahai is a positive north-to-east tectonic element in the east of central sag It is fukang sag in the south, dongdao haizi northern sag in the north, wucaiwan say in the northeast, with the saxi fracture as a boundary in the southeast, be neighbor to fault zone of shazhang and saqi heave, and be close to fukang sag in the west.Since XISHANYAO period, climate began to become wet, structure is relatively stable, material sources mainly come from north east, the second is the northern material sources, sedimentary area is is farther from the provenance distance, elastic material supply degree become weak, lake plane steady rise in general, forming a meandering river delta depositional. Delta lobes wide at less than1:1, in northeast to southwest. Meandering river delta relative braided delta speaking, belongs to the fine grain of delta, than an average of0.4to sand, meandering river sand land belongs to the scope of the ratio. The electrical characteristics mainly for bell-box combination. The study area under the condition of humid climate meandering river delta material sources of supply relative degree than the braided fluvial river delta clastic particle supply to low level, and the damp climate, vegetation development, resulting in the meandering river delta plain seam comparison with development, distribution range is wider.Under the study of the geology background of the research area, mainly researched sedimentary and sedimentation model, using the image from the high resolution seismic data to discover distributed shape and interior component of lithosomic body, realizing Fine depict to palaeosedimentary environment。Including:①geologic model building through present deposition and the outcrop research;②using the geologic model conduct forward research, conform seismic response of the model;③Based on forward, using high precision of sequence stratigraphy to analysis the seismic data, building spatial distribution regularities of the depositional system;④Make full use of seismic analysis technology and imaging technology to store collective fine description and get the sedimentation of the comprehensive accurate understanding, then guide to the favorable zones of prediction.In the Jurassic sedimentary xishan kiln system research, using seismic sedimentology research results, this paper summarizes the characteristics of sedimentary facies and sediment group depositional model. Xishan kiln extensively develop meandering river delta deposition. Xishan kiln a sand body more development, vertical overlapping buy, a stack of tile form, connectivity is poorer, has more than one because of the formation of the migration of lake argillaceous space strip.Through two years of painstaking research, complete the following tasks:1, the White House was raised-north slope area tectonic characteristics research;2, reconstruction late Jurassic White House raised the ancient tectonic form;3and sedimentation on earthquake in xishan kiln Jurassic sedimentary facies research group。 Including:(1)Structure interpretation of the main work is complete:1) The White House3d work area of purpose for the Jurassic layer xishan kiln group earthquake fine structure explained2) The White House3d work area of the Jurassic xishan kiln group structure maps3) The White House3d work area of xishan Jurassic ancient tectonic map of kiln4) Complete White House3d work area of1000km2sea Jurassic xishan kiln group log constrained wave impedance inversion5) The White House3d work area of the Jurassic xishan kiln group seismic multi-attribute extraction6) In the seismic section tracking Jurassic of sequence interface of xishan kiln, establish seismic stratigraphy grid lines of article10, and in all the work area encryption to50×50way, key of sequence track to10×10way.(2)In the deposition and sequence of the main work completed1) perfect the research work area:collecting, sorting, load120mouth drilling data;2) complete43mouth single well the sedimentary facies in the division,3) complete contrast sand body wears graph article25;4) to complete sand than1of isoline map;5) complete plan1piece of sedimentary facies;6) in the identify of sequence interface, complete three dimensional stratigraphic framework profile stratigraphic classification (drilling+earthquake), involves drilling20mouth;7) finish30Wells of middle period purpose base-level cyclic division, the establishment of sequence profile article6... |
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