Complex Carbonate Hydrocarbon Reservoir Modeling and Reserve Calculating: Taking the Buried Carbonate Hill Oil-Gas Pool Reserve Calculation as an Example
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摘要: 油气藏地质建模是储量计算的基础和前提.针对复杂碳酸盐岩储量计算中油气藏建模、参数求取等具体难点, 通过石油地质、地球物理等多学科新技术、新理论的综合运用, 创新性地建立了潜山准层状油气藏模式, 为计算单元的正确划分、计算方法的适当选择、储量参数的合理取值提供了可靠依据.首次提出并实现了该类油气藏孔洞型和裂缝型储集体油气储量的分别计算, 且对含油体积、有效厚度下限、孔隙度、饱和度等参数的求取进行了计算方法创新和软件开发, 促成了轮南古隆起复杂碳酸盐岩油气储量的大幅度上升, 并为类似油气储量计算提供了依据.Abstract: The modeling of complex hydrocarbon reservoirs is the premise and basis of the calculation of the reserves. In this paper, focusing on the modeling and parameters acquiring in reserve calculation of carbonate rock, a model of karstificated weathering crust-type quasi-layered reservoirs was established by using the new techniques and theories in petroleum geology and geophysics. On the basis of this model, the calculated units could be correctly divided, the calculating method could be properly chosen, and the parameters of reserves could be reasonably selected. Thes proposed and realized a way to calculate the reserves of the vug-type reservoirs and the fissure-type reservoirs respectively. Furthermore, the method for calculating a series of parameters such as the oil-bearing volume, the lower limit of valid thickness, porosity and saturation was innovated, and the corresponding computer software was developed. These innovations dramatically increase the calculated reserves of the complex oil-gas pool in carbonate rocks, and provide an example for the reserve calculation of similar reservoirs.
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图 1 轮南奥陶系准层状油气藏模式
Fig. 1. New pattern of Ordovician quasi-layered pool in Lunnan uplift, Tarim basin
图 2 轮古奥陶系孔隙度解释岩石物理体积模型
Fig. 2. Petrophysical volume model by prosity interpretation in Ordovcian of Lungu
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