A fine reservoir prediction method in oilfield development stage

Abstract

The invention relates to a fine reservoir prediction method of an oilfield development phase. The fine reservoir prediction method comprises the steps of basic data collection, quality control and treatment: carrying out correction on problematic well log by adopting a rock physics method for the single well curve problem and the multi-well consistency problem; utilizing a rock physics analysis method to obtain well log parameters having discrimination on lithologic character, physical property or oil-gas possibility of reservoir, and determining target parameters of reservoir inversion; carrying out fine well-seism calibration to obtain an accurate time-depth relationship; adopting a routine wave impedance inversion method to obtain wave impedance data volumes as external attribute input of multiattribute inversion; for the characteristics of a multiattribute inversion method, filtering high and low frequency information of the well log by adopting a band-pass filtering means, namely, carrying out frequency matching of well-seism data; and taking the obtained wave inversion data volumes as the external attribute input and adopting the multiattribute inversion method to obtain a final inversion result. According to the fine reservoir prediction method of an oilfield development phase, the prediction precision can be effectively improved; the applicable range is wider, and the requirement of the oilfield development phase for reservoir prediction precision can be met.

Description

technical field [0001] The invention relates to the field of reservoir research in the oilfield development stage, in particular to a two-step inversion-based reservoir fine prediction method in the oilfield development stage. Background technique [0002] In the stage of oilfield development, the requirements for reservoir description accuracy are obviously improved, and higher requirements are put forward for seismic technology. Development seismic technology is an extension of exploration seismic technology to the stage of oil and gas field development. It directly meets the needs of oil and gas reservoir development and production. It is dominated by seismic technology, making full use of the advantages of spatially dense sampling of seismic data, and integrating logging, geology, and reservoir engineering. Multi-disciplinary information to achieve fine description and dynamic monitoring of oil and gas reservoir characteristics. [0003] Seismic technology in the develo...

AI Technical Summary

Problems solved by technology

The difficulty is that the current seismic resolution is difficult to meet the development needs, and the accuracy of fluid prediction using conventional seismic data is low

In the stage of oilfield development, the factors that affect the accuracy of reservoir prediction mainly include that the interpretation of oilfield seismic data usually aims to meet the needs of the exploration stage, and the accuracy of geological data decreases due to lag in the stage of oilfield development; However, the results of various logging series lack unified and standardized processing and interpretation; a large number of new inversion software and algorithms have been introduced in reservoir research, but their accuracy and applicability are low, and they cannot meet the needs of fine reservoirs in the oilfield development stage under complex geological conditions in China. Tier Forecast Actual Demand

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