N E W E N E R G Y 76
77
N E W E N E R G Y 78
79
N E W E N E R G Y 80
Beijing 100027; 2. Zhanjiang Branch of CNOOC Ltd., Zhanjiang City, Guangdong Province 524057 Abstract: The Yanan sag of Qiongdongnan Basin is located in pressure transition zone, and it is characterized by complicated reservoir-forming conditions and oil & gas accumulation rules, deeply buried targets, great lateral variation of reservoir, and strong physical heterogeneity. On the basis of fully study of reservoir characteristics and selecting the technology for reservoir prediction and oil & gas detection, the spatial distribution of lithologic reservoir of Sanya Formation is described, the distributed areas of effective reservoir are confirmed, and favorable zone and targets for oil and gas reservoir exploration are identified, by using the acoustic impedance inversion technology, the spectral imaging analysis technology, the technology for analysis of attenuation by absorption and other technologies. Key words: reservoir prediction; oil & gas detection; impedance inversion; spectral imaging; absorption analysis Application of Logging Reconstruction and Constrained Inversion to Reservoir Modeling in CH-2 Area, Dagang Oilfield/Zhang Yi 1, Dou Songjiang 2, Jia Yumei 2, Li Yunxiu 2, Zhang Ying 2 //1. China University of Ming & Technology, Beijing 100083; 2. PetroChina Dagang Oil Field Company, Tianjin 300280 Abstract: CH-2 area is located in beach area of Dagang Oilfield, where the special geological environmental results in difficulty in data acquisition and only a few wells scatter. To build model on this condition, this paper puts forward the geological modeling idea based on seismic data. It mainly depends on the three-dimensional seismic data and the predicting results of logging reconstruction and constrained inversion, using stochastic modeling, to predict distribution of reservoir sand bodies between wells and variation of reservoir properties, and to establish high-precision three-dimensional geological model of reservoir. This approach greatly reduces uncertainty of cross-well reservoir prediction and risk in development, and simultaneously provides good reference for precise reservoir evaluation in similar work area. Key words: beach; deterministic modeling; stochastic modeling; conditional simulation; Dagang Oilfield Detection of Channel Sands of Minghuazhen Formation in Gangxi Oilfield/Wang Juan 1, Li Dongping 1, Lin Guikang 2, Li Chengbao 2, Jiang Longcong 2 // 1. Department of Oil & Gas Reservoir Assessment, PetroChina Dagang Oilfield Company, Tianjin 300280; 2. IntSeis, Beijing 100028 Abstract: Typical meandering stream deposits developed in Tertiary Minghuazhen Formation on the north slope of Gangxi Oilfield, of which channel lag deposit and point bar deposit (point bar) combination are important reservoir types in the area. In order to detect the sands of Minghuazhen Formation, the generalized S transform is applied to frequency-divisional processing of post-stack seismic data, and precise time window analysis is used to collect seismic attributes on the amplitude tuning dominant frequency spectrum data volume along the layer, so as to show the distribution characteristics of the channel. The results show that channel characteristics are clear and natural and fully consistent with the drilling results, achieving the desired purpose. Key words: detection of channel sands; spectral decomposition; precise time window; physical wavelet transform; generalized S transform Provenance and Sedimentary Features of Northern Bonaparte Basin, Australia/Zhou Chuan 1,2, Wang Yingmin 1,2, Huang Zhichao 3, Lu Jinbo 1,2, Zhuo Haiteng 1,2 Han Yong 1,2 //1. Faculty of Natural Resource & Information Technology, China University of Petroleum, Beijing 102249; 2. Key Laboratory for Petroleum Resources and Geophysical Prospecting, Beijing 102249; 3. Institute of Shanghai Offshore Oil & Gas Company, SINOPEC, Shanghai 200120 Abstract: Based on the seismic and drilling data and the provenance-supply mode, the sedimentary sequence, provenance features and oil-gas exploration prospects are analyzed. The study area has the typical double-layer geologic structure of rift-depression, and has double provenance supply in the north and south. The provenance supply in rifting period was mainly from the southern Darwin shelf, and was also from the northern Sahul Platform, while the provenance supply in depression period was mainly from the southern Darwin shelf. In the rifting period, the southern sediment formed a large-scale progradation body, and encountered the delta formed by the northern provenance in the central depression; in the depression period, large-scale neritic deposits developed in Cretaceous, and relatively large-scale platform limestone developed in Sahul Platform and its surroundings in the study area. The seismic data and basin data indicate that, the multi-stage reservoirs of delta, fan delta and shore of Jurassic-Cretaceous could be the good exploration targets. Key words: Northern Bonaparte Basin; sequence; structural evolution; provenance; deposit Study on Formation Laws and Controlling Factors of Oil Shale Deposits in Extensional Basins in Northeast China//Liu Renhe 1, Tang Shuheng 2, Liang Feng 1 //1. Research Institute of Petroleum Exploration and Development-Langfang, Langfang City, Hebei Province 065007; 2. China University of Geosciences, Beijing 100083 Abstract: Oil shale is distributed all over China, concentrating in Mesozoic and Cenozoic basins. It is mainly distributed in extensional basins, flexure basins, strike-slip basins and cratonic basins in accordance with basin type, and extensional oil shale basins are in the majority. Through the study on the extensional oil shale basins in Northeast China, this paper emphasizes on the formation law of oil shale in Songliao Basin and Dalianhe mining area of Yilan Basin, sums up the factors controlling the formation of oil shale deposits in the extensional basins in Northeast China. The formation of oil shale deposits is mainly affected by the sedimentary environment, paleostructure, paleoclimate, organic matter sources, redox conditions, paleotopography, paleosalinity, etc. The study on the formation law of oil shale deposits in extensional oil shale basins has promoted the development of China's geological theory of oil shale and the exploration and development of similar oil shale basins. Key words: oil shale; extensional basin; sedimentary environment; formation law; controlling factor