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Structure Interpretation and Reservoir Forecast of Gaotaizi Block in Changyuan, Daqing

Author: HuangWei
Tutor: ChenHanLin；ZhuZuo
School: Zhejiang University
Course: Geology
Keywords: Daqing placanticline 3D seismic fold fault reservoir interpretation application
CLC: P618.13
Type: Master's thesis
Year: 2010
Downloads: 143
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Abstract


For improving the development effects of Gaotaizi work area encompassing constructing inside digging, extension development and potential evaluation of Fuyu oil layer, the well-seismic structure and fault interpretation methods are identified based on the analysis and research, as well as that the structural interpretations of PuⅠformation oil layer of 328 km2 and Fuyu oil layer are completed. Simultaneously, the quality of logging curve in the work area is analyzed and calibrated, as well as, logging curve and inversion method that applied in the reservoir inversion are identified. Several understands are concluded as following:1. Combine 3D seismic with well data to interpret finely, and the fine structural forms of 6 beds of interest-T06 (top ofⅡformation of Nenjiang group), T1 (top of Yaojia formation), T1-1 (top of PuⅠformation), T2 (top of QuanⅣformation), FⅡ(top of FuⅡformation) and FⅢ(top of FuⅢformation) are investigated.2. The structural form from T2 to T06 is inherited, and the whole structural trend is shown south high and north low which is presented 3 obvious associative anticlines, including a saddle in the middle of work area. The overall structural axial is NNE which characterizes steep west wing and gentle east wing. The development of fault reduces from bottom to top gradually, boundary as top of Yaojia formation, fault is characterized as 2 periods of development features, and the lower QuanⅣformation is faulted, encompassing large lower fault throw as well as small upper.3 sets of faults for NNW, near SN, NE trend of work area are developed in the horizon, and the characteristic of zonality of fault is obvious.3. The reservoir inversion results show that in PuⅠformation, the development scale of channel sand body is small, phase transition in the plane is fast, and the straight narrow channel sand body that belongs to infront is main part.4. In general, the distribution and origin of residual oil in PuⅠis distributed in the area that understanding fault deeply, and single sand bed is mainly distributed inside the channel sand body that with imperfect injection/production. The reservoir type of Fuyu oil layer is mainly fault-lithologic composite hydrocarbon reservoir, and the fault-lithologic reservoir formed by inverse. normal fault is one of the reservoir types in this area. The better deployment between high horst block as well as high structural part and sand body is the favorable place that gather reservoir, and the channel sand body is the main accumulative body of this area. The form of reservoir in Fuyu oil layer is the result of organic coordination for oil resource, structure, sand body and sedimentary facies, and the west actic region advantages to explore lithologic reservoir.

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