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Lin B.,Jilin University | Zhang X.,Sinopec | Xu X.,Jilin University | Yuan J.,Jilin University | And 3 more authors.
Earth-Science Reviews | Year: 2015

The Tarim Basin, as the largest inland, oil-producing basin in China, is a large-scale composite basin, which formed from a Palaeozoic craton basin that was overprinted by a Mesozoic-Cenozoic foreland basin. Based on comprehensive analyses of gravitational data, aeromagnetic data and seismic data from the basin, 38 basement faults can be identified, demonstrating that the Tarim Basin has undergone several tectonic cycles. According to their distributional locations in the basin, basement faults can be divided into marginal and internal basin basement faults. Moreover, on the basis of the distribution characteristics in the plane and controlling effects on the basin, the basement faults can be divided into 20 primary basement faults and 18 secondary basement faults. Combined with the interpretations of seismic profiles, we can determine the relationship between the basement faults and sedimentary cover faults. Considering the section balance of seismic profiles, we find that some basement faults are syn-depositional with continuous long-term activity during the basin's evolution and control the deposition in the basin. By counting fault growth indexes of the main sections, it is obvious that different parts of the same fault have different growth indexes but show similar activity within the same geological period. The faults' stress states remain consistent with their geological history, although the growth indexes of different faults are inconsistent. © 2015 Elsevier B.V. Source


Zhang X.R.,Jilin University | Zhang X.R.,Key Laboratory for Oil Shale and Coexistent Energy Minerals of Jilin Province | Zhang X.R.,Key Laboratory for Evolution of Past Life and Environment in Northeast Asia | Fang S.,Jilin University | And 4 more authors.
Applied Mechanics and Materials | Year: 2013

The later-period structure of Fuyang oil layer is very complex, and the reservoir mainly consists of river-way sand. The form of the reservoir is narrow and distributed differently, so it is very hard to identify. To accurately predict sand bodies, the sand bodies in the river way are comparatively studied using multiple post-stack seismic attributes, and finally a conclusion is made as follows: the reservoir interpretation technology based on frequency possesses a high spatial resolution and can test the spectrum lateral variation caused by different deposits, and then the plane distributions of the river-way and other deposits are described using equifrequent slices, and the combination characteristics of different deposit rhythmic layers are quantitatively analyzed, and also the thickness change of the river-way can be quantitatively analyzed under the ideal condition. Meanwhile, spectrum imaging is implemented using the tuning frequency of the different thickness of the sand bodies, and the reservoir is identified through the spatial changes of amplitude energy, facies values, and frequency attenuation attributes under the different chosen frequency, so that the spatial discontinuity of the deposits is effectively described. Therefore, it can meet the exploration and development needs of the oil field to a certain extent. © (2013) Trans Tech Publications, Switzerland. Source


Fang S.,Jilin University | Fang S.,Key Laboratory for Oil Shale and Coexistent Energy Minerals of Jilin Province | Fang S.,Key Laboratory for Evolution of Past Life and Environment in Northeast Asia | Zhang X.R.,Jilin University | And 4 more authors.
Applied Mechanics and Materials | Year: 2013

The later-period structure of Fuyang oil layer is very complex, and its reservoir mainly consists of riverway sand bodies; the oil and gas reservoir is significantly concealed, so it is greatly difficult to identify. In order to accurately predict sand bodies by using seismic data, a well constrained inversion is made to the layer flattening seismic data using Jason software under the high-resolution sequence framework. Through a comprehensive analysis on seismic and geological data, the absolute error is within ±500, the relative error is within 10%; the predicted sand body plane distribution is reasonable, and the absolute error of 82% sand bodies is less than 10%. This proves that well constrained inversion for the Jason-based layer flattening seismic data under the high-resolution isochronous framework has an obvious effect on the areas of complex later-period structure, and thin and complex changed sand bodies. Therefore, it can meet the needs of the oil field exploration and development to a certain extent. © (2013) Trans Tech Publications, Switzerland. Source


Zhang X.R.,Jilin University | Zhang X.R.,Key Laboratory for Oil Shale and Coexistent Energy Minerals of Jilin Province | Zhang X.R.,Key Laboratory for Evolution of Past Life and Environment in Northeast Asia | Fang S.,Jilin University | And 4 more authors.
Applied Mechanics and Materials | Year: 2013

Fuyu oil layer in Changyuan of Daqing is a strategic area for Daqing oil field to increase and stabilize production at present, but its reservoir is structured mostly by riverway sand bodies. The sand bodies are thin and change with complexity, so they are difficult to identify. Through PNN probability neural network, and combined with the seismic multi-attribute and earthquake frequency division data, wave impedance inversions are implemented, and the maximum correlation coefficient is 0.517 if a single attribute is described and it is raised to 0.773 by linear weighting, and also 9 independent attributes are used for PNN network training so that a more complex nonlinear relationship is obtained. Then, the correlation coefficient continues to increase until 0.869, so that the spatial distribution characteristics of the sandstones in the study area are accurately described. This indicates that the PNN neural network inversion based on the integration of seismic multi-attribute with frequency division RGB can play an obvious effect in the areas of thin and changing sand bodies, and can meet the needs of the oil field exploration and development. © (2013) Trans Tech Publications, Switzerland. Source


Fang S.,Jilin University | Fang S.,Key Laboratory for Oil Shale and Coexistent Energy Minerals of Jilin Province | Fang S.,Key Laboratory for Evolution of Past Life and Environment in Northeast Asia | Zhang X.R.,Jilin University | And 4 more authors.
Applied Mechanics and Materials | Year: 2013

The formation in Wudong area is complex, and oil and gas reservoirs are seriously concealed and very difficult to identify. Thus, to accurately predict the sand bodies by using seismic data, the facies controlled multi-point geological statistical model constrained inversion technology under the isochronous framework is applied. Through a comprehensive explanation on the seismic and geological data, the deposit facies space distribution in the study area is reveled, and then a very stable space variation function is solved in combination with the multi-point geological statistical model analyzed in the developed well. Seismic stochastic inversion constrained by the model is implemented, and its prediction accordance rate of the sand bodies reaches 87.5%, proving the facies controlled multi-point geological statistical model constrained inversion technology under the isochronous framework are only targeted at a few wells, and plays a very significant effect on the area of few wells, uneven distribution, and complex formation evolution. Thus, the model can meet the needs of the oil field exploration and development. © (2013) Trans Tech Publications, Switzerland. Source

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