基于岩石类型约束的碳酸盐岩油藏地质建模方法——以扎格罗斯盆地碳酸盐岩油藏A为例

doi:10.11743/ogg20130419

Abstract

Abstract: For carbonate reservoirs which undergo significant overprint of diagenesis,sedimentary facies-constrained reservoir modeling method is no longer applicable.This paper puts forward a rock type-constrained geological modeling method for this kind of reservoirs.By taking advantage of the available core data such as porosity,permeability and capillary pressure,we used Winland R₃₅ method to identify the rock types of carbonate reservoirs,and to derive porosity-permeability relationships for different rock types.The relationships between rock types and log responses were then established for the cored wells,and were utilized to predict rock types in uncored wells.A porosity model was finally built based on the coordinated constraint of rock type and seismic acoustic impedance volume,and a permeability model was built by using the porosity-permeability relationships for different rock types.The reliability of geological model was checked by the method of decreasing wells.This method is particularly applicable to carbonate reservoirs with strong diagenesis and deep burial depth.

Key words: seismic acoustic impedance, rock type, KNN algorithm, Winland R₃₅ method, carbonate rock, geological modeling

CLC Number:

TE122.2

Tan Xuequn, Lian Peiqing, Qiu Maojun, Li Yanhua, Dong Guangwei. Rock type-constrained geological modeling of carbonate reservoirs：a case study of carbonate reservoir A in the Zagros Basin[J]. Oil & Gas Geology, 2013, 34(4): 558-563.

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Rock type-constrained geological modeling of carbonate reservoirs：a case study of carbonate reservoir A in the Zagros Basin

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