Method and system for analyzing and processing subsequent flow data in well testing data

Abstract

An embodiment of the invention discloses a method and a system for analyzing and processing subsequent flow data in well testing data. The method includes premeasuring relationships between isochronous rate and various influence factors under various lithological conditions, acquiring relationship data between the isochronous rate and reservoir lithology, reservoir structures and fluid characteristics, and establishing an isochronous rate math model; in the process of reservoir well testing, respectively collecting bottom hole pressure at different collection time points, and acquiring a measured isochronous rate curve between the isochronous rate VP and an isochronous time interval t; selecting well testing explanation model parameters, calculating model isochronous rates VP' at different time points according to the isochronous rate math model and the selected well testing explanation model parameters, and acquiring a model isochronous rate curve between the VP' and a model isochronous time interval; fitting the model isochronous rate curve with the measured isochronous rate curve, and acquiring reservoir characteristic parameters. By the method and the system, analyzing and processing of the subsequent flow data in the well testing data can be realized.

Description

technical field [0001] The invention relates to an evaluation, analysis and processing technology of well test data in oilfield exploration and development, in particular to an analysis and processing method and system for continuous flow data in well test data. Background technique [0002] Well testing (also known as: testing) is an important means of timely obtaining reservoir characteristic information and quantitative evaluation and analysis of oil and gas layers in the process of oilfield exploration and development. The results are calculation of oilfield reserves, reservoir models, formulation of exploration Reservoir characteristic parameter data necessary for plan, development plan and measure optimization. [0003] Well test interpretation is a key link in the evaluation, analysis and processing of formation testing and well test data. The data obtained by the well test process must apply well test interpretation theory and methods, and obtain reservoir characteri...

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Problems solved by technology

[0008] The theory and method of well test interpretation based on the radial flow seepage theory cannot evaluate and analyze the continuous flow data, and has not formed a corresponding theoretical basis and evaluation and analysis method. method, mechanical correction method, early freewheeling time correction method, single well mathematical model and other methods, through subdivided flow rate, well shut-in time correction, production time compensation, etc., are all inseparable from the continuous flow data through certain experience correction or Mechanical correction, so that the data that do not conform to the radial flow theory can be analyzed and processed by applying the radial flow theory after correction. Due to the application of its theoretical basis, there are certain problems, and the interpretation method established thereby is complicated and has great potential. It can only be used as a reference analysis in empirical comparative research and personality analysis evaluation, and cannot meet the evaluation analysis of well test data and mine application requirements.

[0009] Therefore, the application of the radial flow well testing theory and method cannot systematically and comprehensively process and evaluate the continuous flow data, and the lack of reservoir characteristic parameter data obtained through well testing has become the dominant factor restricting oilfield exploration and development.

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