Dessert reservoir forecasting method and forecasting device

A prediction method and reservoir technology, applied in seismology for logging records, special data processing applications, instruments, etc., can solve the problem that the prediction accuracy is not high and it is difficult to establish low-permeability clastic rock reservoirs Problems such as physical models to achieve the effect of reducing multi-solution and improving accuracy

Active Publication Date: 2015-02-04
PETROCHINA CO LTD
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Problems solved by technology

For reservoir porosity prediction, it is generally necessary to establish a velocity-porosity relationship. Whether this relationship is linear or nonlinear, it varies with time and space with changes in longitudinal compaction and la

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  • Dessert reservoir forecasting method and forecasting device
  • Dessert reservoir forecasting method and forecasting device

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[0068] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with embodiments and drawings. Here, the illustrative embodiments of the present invention and the description thereof are used to explain the present invention, but not as a limitation to the present invention.

[0069] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0070] reference figure 1 As shown, the method for predicting a sweet reservoir in an embodiment of the present invention includes the following steps:

[0071] Step S101. The ancient geomorphology restoration technology based on seismic sequence stratigraphic interpretation delineates the distribution range of favorable sedimentary facies belts of the target layer. The specific process of this step is as follows:

[0072] First, determine the t...

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Abstract

The invention provides a dessert reservoir forecasting method and forecasting device. The method includes the steps: delineating the distribution range of a favorable sedimentary facies belt of a target layer based on ancient landform restoration technology of seismic sequence stratigraphic interpretation; forecasting the spreading range of main channel sand within the distribution range of the favorable sedimentary facies belt based on seismic attribute quantitative analysis technology of forward modeling; forecasting reservoir physical property distribution within the spreading range of the main channel sand based on CRP (common reflection point) gather optimization pre-stack elastic impedance inversion technology. Multiplicity caused by directly forecasting reservoir physical properties by the aid of three-dimensional seismic data in the prior art is reduced, so that low-permeability clastic rock reservoir forecasting accuracy is improved.

Description

Technical field [0001] The invention relates to the technical field of reservoir prediction, in particular to a prediction method and a prediction device of a sweet reservoir. Background technique [0002] Since the US Geological Survey put forward the concept of sweet reservoir in 1999, the prediction technology of sweet reservoir in low permeability clastic rock reservoir has been developed rapidly. Sweet-sweet reservoirs refer to relatively well-developed high-quality reservoirs under the background of low porosity and low permeability. Because of the small difference in geophysical response between sweet-sweet reservoirs and non-sweet-sweet reservoirs, it is difficult to identify with seismic data. In seismic reservoir prediction, physical property prediction is a difficult point. For reservoir porosity prediction, it is generally necessary to establish a velocity-porosity relationship. This relationship, whether linear or non-linear, changes with time and space with changes...

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Application Information

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IPC IPC(8): G01V1/50G06F19/00
Inventor 许多年潘建国王斌唐勇尹路瞿建华王国栋陈刚强曲永强陈雪珍李德滋黄玉
Owner PETROCHINA CO LTD
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