Offshore oilfield reservoir prediction method based on composite sand body construction plate

Abstract

The invention relates to an offshore oilfield reservoir prediction method based on a composite sand body construction plate. The offshore oilfield reservoir prediction method includes the following steps that firstly, according to the meandering stream composite sand body construction plate, composite sand body constructions at development positions of different sequences on an offshore target oil field are qualitatively forecasted; secondly, scale characteristic parameters of different types of composite sand bodies of the offshore target oil field are obtained, wherein the thicknesses of the different types of composite sand bodies are obtained through the well logging interpretation, sand / land ratios of the different types of composite sand bodies are calculated on the basis of the thicknesses of the sand bodies, the widths of the different types of composite sand bodies are calculated through ground penetrating radar interpretation and seismic profile measurement; thirdly, the predicted composite sand body constructions is combined with an obtained comparison result of the scale characteristic parameters and a standard value of the scale characteristic parameters, the exploration value of the offshore target oil field is judged and an exploration scheme is determined. The offshore oilfield reservoir prediction method can be widely applied to exploration and development of offshore oilfields with the sparse well density, the small dynamic information amount and the large absolute scale difference of construcion units.

Description

technical field [0001] The invention relates to a method for predicting oilfield reservoirs, in particular to a method for predicting offshore oilfield reservoirs based on composite sand body configuration charts. Background technique [0002] Different levels of seepage barriers in offshore oilfield reservoirs have an important impact on the formation and distribution of remaining oil. As the oilfield development enters a high water cut period, the contradiction between injection and production is becoming more and more prominent, and the division of oilfield reservoirs is required to be more and more fine. How to accurately Predicting and finely characterizing the sandbody architecture is an important problem we are currently facing. At present, the method of reservoir layer interface division and structural unit research proposed by Miall (person's name) is mainly used at home and abroad. This method is a new research method that combines sedimentology and reservoir geolo...

AI Technical Summary

Problems solved by technology

Offshore oilfields are characterized by sparse well pattern density, less dynamic information, and large differences in the absolute scale of architectures of the same type of facies, so offshore oilfields do not have the conditions for the study of single sandbody architectures

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