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| THE OPTIMIZATION OF ALGORITHMS FOR LITHOLOGIC MODELING IN THE GASI OIL FIELD |
| LI Mi1, LI Shao-hua2, HE Huo-hua2 |
1. The Puguang branch of Zhongyuan Oil Field, Dazhou 635000, China;
2. School of Geosciences, Yangtze University, Jingzhou 434023, China |
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Abstract This paper deals with optimizing algorithms of lithologic modeling. Firstly, under the guidance of high resolution sequence stratigraphy, geological, outcrop, seismic, logging and other static data are applied to the fullest possible extent. The logging data advantage of high vertical resolution and the seismic data advantage of rich lateral information are exploited to the full to establish the high accuracy isochronous stratigraphic model under the restraint of geological regularity. Then, taking the petrographic data obtained from well log data as the condition data, and using indicator kriging algorithm, truncated Gaussian simulation,object-based simulation and sequential indicator simulation, we can establish the sand body distribution model. Lastly, algorithms are optimized through sampling inspection so as to establish three-dimensional high-precision geological model under the conditions of different well densities and different development stages. It may contribute to establishing 3D geological model in some oilfields with similar geological backgrounds. A comparison shows that the optimized indicator kriging and sequential indicator simulation can better characterize geological features of the target area.
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Received: 01 April 2011
Published: 10 April 2012
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