濱里海盆地B區(qū)塊KT2段儲層預(yù)測及目標優(yōu)選
[Abstract]:After many years of exploration work in B block of the coastal Caspian basin, the whole area has been covered by conventional 3D seismic data, and the large oil and gas fields in Troy oilfield have been discovered by using conventional seismic data. With the major breakthrough in the exploration of large-scale tectonic-lithologic reservoirs on the Trulwaxi slope, in order to better carry out the evaluation of the reservoirs and reservoirs on the Trulwaxi slope and to improve the success rate of drilling in this area, a wide azimuth has been deployed in the Trulwaxi slope. Wide-band, high-density, high-precision three-dimensional seismic data. On the basis of high precision 3D seismic data, this project is aimed at the key exploration of the oil formation of KT2 formation of Carboniferous system, and the three characteristics of high precision 3D seismic data, and the research work is carried out in the light of the three characteristics of the high-precision 3D seismic data. Firstly, fine structural interpretation is carried out by using high-precision imaging data. On the basis of this, the time-depth transformation of velocity field is established by using high-density velocity spectrum, and the structural characteristics of the top boundary of the main oil-bearing formation KT2 formation are high in the southeast. A large, broad, slow nose structure with low in the northwest; Secondly, the low frequency inversion is used to predict the reservoir by using the low frequency component of the broadband data, and the reservoir distribution characteristics of the No. 2 oil group are carried out. The inversion results show that the reservoir of the No. 2 oil group is mainly distributed in the middle of the block, and the reservoir is distributed in the north-east direction. The inversion results are in good agreement with the drilling results. Then using the azimuth information to carry out the heterogeneity analysis and fracture prediction work, it is clear that two groups of fractures are mainly developed on the top surface of the No. 2 oil formation, the strike of the fractures is mainly in the north east and the north west, and the fractures are mainly developed in the areas where the salt dunes are developed. Is closely related to the distribution of salt dunes; Finally, using low-frequency seismic information to carry out oil and gas detection and analysis, the favorable oil-gas zone is implemented, and finally the oil and gas distribution in the study area is mainly in the eastern part of the block and in the three north-east strike zones. Finally, the favorable exploration zone is selected through comprehensive analysis, and 8 wells are suggested to be selected in the favorable exploration area.
【學(xué)位授予單位】:東北石油大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2016
【分類號】:P618.13
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