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| Quantitative Analysis of Sedimentary Heterogeneities |
| HUANG Xiu1,2, LIU Ke-yu1,2,3, WU Song-tao1,4, GUI Li-li1,2 |
1. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China;
2. CNPC Key Laboratory for Basin Structure and Hydrocarbon Accumulation, Beijing 100083, China;
3. CSIRO Energy Flagship, P.O.Box 1130, Bentley, WA 6102, Australia;
4. CNPC Key Laboratory for Oil and Gas Reservoir, Beijing 100083, China |
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Abstract Sedimentary heterogeneities, which exist in nature at all scales, can be quantitatively characterized by using geostatistics and numerical simulations. In this study, a three-dimensional stratigraphic forward modelling program, Sedsim, was used to simulate the development and evolution of the shallow-water deltas of the Chang 8-6 members of the Yanchang Formation in the Odors Basin. The results showed that bath geostatistics and stratigraphic forward simulations can characterize the sedimentary heterogeneities well. For instance, the geostatistical approach, such as LevySim, can effectively characterize the heterogeneity parameters of sedimentary facies without tedious subdivision, while numerical simulations, such as stratigraphic forward modelling tools (Sedsim), can be used to rapidly test multiple working hypotheses of the relationships between the hydrodynamic processes and depositional facies at various scales. The combination of the non-Gaussian geostatistical method and stratigraphic forward modeling approaches not only can effectively characterize sedimentary heterogeneities at different scales but also can provide a new way for the quantitative evaluation of unconventional reservoirs.
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Received: 30 June 2014
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