Modeling of Carbonate Fracture-Vuggy Reservoir: A Case Study of Ordovician Reservoir of 4th Block in Tahe Oilfield
详细信息
- 责任者：Hou Jiagen (School of Geosciences ; China University of Petroleum (Beijing) ; Beijing 102249 ; China) ; Ma Xiaoqiang
- 刊名：Earth Science Frontiers
- 出版年：2012
- 卷期：19(2)
- 关键词：碳酸盐岩储集层 ; carbonate reservoirs ; 裂隙型储集层 ; fractured reservoirs ; 新疆 ; Xinjiang
- 页码：p.59-66
- 图表：8 illus., 1 table, 23 refs.
- 分类号：1003
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
The carbonate fracture-cavity reservoirs have experienced multiple tectonic movements,strong weathering,denudation and eluviations and the storage space has various types,irregular geometrical shape and stochastic spatial distribution,resulting in the difficulties in 3D description of the reservoirs and direct application of the existing modeling method of clastic rock reservoir.This paper proposed the research idea of classification modeling of large cave,solution pores,large scale fractures and small scale fractures about carbonate fracture-vuggy reservoir.Taking drilling and seismic interpretation as deterministic data of large cave,restrained by large cave development probability cube from seismic wave impedance interwell,under the frame of vertical karst zoning and planar paleogeomorphy division,we use the sequential indicator simulation with a trend to establish the discrete distribution model of large cave;using large cave discrete distribution as the facies controlling condition,taking the solution pores interpretation from borehole as hard data,making use of the sequential indicator simulation algorithm,we establish the stochastic distribution model of solution pores;according to the fault information automatically extracted from seismic ant cube,revising seismic interpretation fault data by man-machine interactive,we build the deterministic discrete distribution model of large scale fractures;obtaining the interwell development probability body of small scale fractures based on discrete distribution model of large scale fractures,integrating the fracture density and attitude of borehole,we set up the discrete distribution model of small scale fractures by combination of the annealing simulation and the object-based marked point processes simulation.Finally we use the above modelling methods,taking the Ordovician carbonate reservoirs in Tahe oilfield 4th block as an example,to set up the geometrical spatial model of fracture-vuggy reservoir.The model can display 3D structure shape of the reservoir.
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