Method for predicting geological reserve of oil reservoir

Abstract

The invention relates to a method for predicting the geological reserve of an oil reservoir, and relates to the technical field of oil exploration. The method includes the following steps that 1, in computing element division, wherein based on the planar distribution and features of the oil reservoir, reserve computing units are divided longitudinally from bottom to top; 2, in data recording, wherein based on well drilling, oil testing and well logging work of the same layer of an adjacent region, data is recorded, the type of the oil reservoir is cleared, and an oil layer division standard, asingle well effective thickness, a ground crude oil density, an effective porosity and oil saturation are determined; 3, reserve calculation is performed. With the method for predicting the geological reserve of the oil reservoir, the contradiction of an oil-water relation can be solved after a development well is implemented, through fine research on all reserve parameters, the calculation errors of the geological reserve of the oil reservoir can be reduced as many as possible, and the method has a better guiding effect when an oil reservoir development scheme is adjusted.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration, more specifically, the invention relates to a method for predicting geological reserves of oil reservoirs. Background technique [0002] For the initial stage of oilfield exploration and development or the process of acquisition and evaluation of oil and gas resources projects, in order to predict oil and natural gas geological reserves in oilfields, the existing technology provides a rapid calculation method for non-uniform oil-water interface reservoir reserves. A reservoir is regarded as a reservoir for rapid reserve calculation. Although this method can provide rapid calculation and prediction, the prediction accuracy is not enough and it is difficult to use it as a guidance basis for actual production. Therefore, after the deployment and implementation of the reservoir according to the development plan, it is generally necessary to re-understand and evaluate the reservoir to ob...

AI Technical Summary

Problems solved by technology

However, after the implementation of development wells, there is a certain or large difference from the understanding of crude oil reservoirs, the identification and evaluation of oil layers is difficult, and the oil-water relationship is complicated. If the drilling situation of later development wells is not considered, the reservoir parameters should be re-established and the reserves should be re-forecasted , will make the adjustment of the development plan unreasonable

Specifically, for example, when the oil-water interface is obtained through the geological analysis of well-tie reservoirs mentioned above, due to the fact that it is in the early stage of development and there are few wells drilled, the predicted oil-bearing range may not be accurate enough, and the reservoir reserves obtained by further calculation have large errors

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