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Chen S.-M.,Exploraiion and Development Research Institute of Daqing | Zhang Y.-G.,Exploraiion and Development Research Institute of Daqing | Jiang C.-J.,Exploraiion and Development Research Institute of Daqing
Chinese Journal of Geophysics (Acta Geophysica Sinica) | Year: 2011

With the deepening of exploration and development, volcanic gas shows the feature separate reservoir of volcanic edifice. The non-homogeneous characteristics of volcanic formation are obvious. For meeting the need of meticulous study of exploration and development, improving the level of volcanic gas reservoir comprehensive study and achieving a understanding, in the Xujiaweizi depression dense well pattern-three dimensional seismic area of Songliao basin, the authors research the seismic volcanic edifice anatomy under geological prior model constraint. Three kinds of volcanic edifices can be identified as layered, dome, and funnel-shaped. The overlying mode is in three kinds of shoestring, superimposed mosaic type. Volcanic edifice type and overlying mode are controlled by fault systems. Source


Zhang Y.-G.,Exploraiion and Development Research Institute of Daqing | Liu J.-Y.,Exploraiion and Development Research Institute of Daqing | Xin Z.-K.,Exploraiion and Development Research Institute of Daqing | Bao L.,Exploraiion and Development Research Institute of Daqing
Chinese Journal of Geophysics (Acta Geophysica Sinica) | Year: 2011

Shahezi formation is the product of a quiet period of intermittent volcano ,between two main volcanic products of Huoshiling and Yingcheng formation. It's also the main gas source of the Yingcheng formation volcanic gas reservoir in Xujiaweizi depression. On the basis of the study on whole Xujiaweizi depression, the authors analyze the distribution and growth characteristics of the Shahezi formation, using the three-dimensional seismic and drilling data. Based on the analysis of existing types of sedimentary facies, the spatial distribution of Shahezi formation sedimentary facies is predicted, indicating the features of the formation centered at the lake with surrounding water systems converging to the depression. The whole sedimentary facies of Shahezi formation evolved from the lower segment of the lake environment to the upper segment fluvial environment, which reflects the trend of the water expansion to contraction. Based on their mode of occurrence, stratigraphic contact relationship and typical deposition, the isolated volcanic edifice developed on the Xuxi fault should be attributed to the period of Shahezi. Source

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