Model building for Chang-8 low permeability sandstone reservoir in the Yanchang formation of the Xifeng oil field |
| |
Authors: | SONG Fan HOU Jia-gen SU Ni-na |
| |
Affiliation: | School of Resources and Information, China University of Petroleum, Beijing 102249, China |
| |
Abstract: | In order to build a model for the Chang-8 low permeability sandstone reservoir in the Yanchang formation of the Xifeng oil field, we studied sedlimentation and diagenesis of sandstone and analyzed major factors controlling this low permeability reser-voir. By doing so, we have made clear that the spatial distribution of reservoir attribute parameters is controlled by the spatial dis-tribution of various kinds of sandstone bodies. By taking advantage of many coring wells and high quality logging data, we used regression analysis for a single well with geological conditions as constraints, to build the interpretation model for logging data and to calculate attribute parameters for a single well, which ensured accuracy of the 1-D vertical model. On this basis, we built a litho-facies model to replace the sedimentary facies model. In addition, we also built a porosity model by using a sequential Gaussian simulation with the lithofacies model as the constraint. In the end, we built a permeability model by using Markov-Bayes simula-tion, with the porosity attribute as the covariate. The results show that the permeability model reflects very well the relative differ-ences between low permeability values, which is of great importance for locating high permeability zones and forecasting zones favorable for exploration and exploitation. |
| |
Keywords: | Xifeng oil field low permeability reservoir attribute parameter Markov-Bayes model permeability model |
本文献已被 维普 万方数据 等数据库收录! |
|