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Wu M.,Geoscience Research Institute of Shengli Oilfield | Wu M.,Tongji University | Lu S.-Q.,Geophysical Prospecting Research Institute of Shengli Oilfield | Yang F.-L.,Tongji University
Wutan Huatan Jisuan Jishu

Several sets of fan-delta develop in the forth member of shahejie formation, in Luojia area, Jiyang depression. It has been conformed by well and core data that the effective reservoirs usually consist in the micro-facies of subaqueous distributary channel in sub-facies of fan-dalta front. However, structural complexity and rapid lateral changes of reservoirs and low seismic resolution have been restricted the facies precise identification in conventional wave-impedance inversion seismic data. Therefore, high-density seismic data is used and the reconstructed-logs pseudo-wave impedance seismic inversion is adopted in this paper. These attempts increase the facies seismic i- dentification accuracy to micro-facies, obtaining sound effects. Source

Zhang X.,CAS Institute of Geology and Geophysics | Zhang X.,Geoscience Research Institute of Shengli Oilfield | Wen Z.-F.,Geoscience Research Institute of Shengli Oilfield | Wang W.,Geoscience Research Institute of Shengli Oilfield | Cui X.-D.,Geoscience Research Institute of Shengli Oilfield
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science)

The forming mechanism and geophysical characteristics of associated diapir structure in Dongxin Oilfield were studied based on the seismic interpretation results of high-precision three-dimensional seismic data. The results show that "Y"-type fault combination is the common associated diapir structure in Dongxin Oilfield, and "X "type fault combination is a major factor in the formation of fault system. "X"-type faults, there are two cutting methods, one of which appears in the concentration area at the top of arch, taking place at the same grade or different grade faults; the other one is caused by tension at major faults in the arch for the passage. The pressure change of faults should be analyzed during fixed period. The pressure on lower grade faults is bigger than that on higher grade faults during certain period, and lower grade faults could cut through higher grade faults. This interpretation could solve multi-department structure mapping of the confusion, and some of the sequence was cut off grade level to improve, which could help in fault sealing analysis and reasonable interpretation of relations between oil and water. Source

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