Edge water gas reservoir water breakthrough time prediction method

Abstract

The invention belongs to the petroleum and natural gas development technical field and discloses an edge water gas reservoir water breakthrough time prediction method. The method includes the following steps that: edge water gas reservoir geological data and analysis test data are obtained; a three-dimensional geological model under combination modes of four kinds of heterogeneous reservoir stratums is established, and a gas area and an edge water area of an edge water gas reservoir are divided, and a virtual well is established in the gas area of the edge water gas reservoir; and the gas well water breakthrough time of the edge water gas reservoir under the combination modes of the different kinds of heterogeneous reservoir stratums can be accurately predicted through using response relationships between the gas well water breakthrough time and the heterogeneous feature parameters of the reservoir stratums. The method can be used for guiding the adjustment of gas reservoir development work systems. With the method adopted, the output of a well which is to be subject to water breakthrough can be decreased timely, and production pressure difference can be controlled; the advance speed of edge-bottom water can be effectively slowed down; and therefore, technical support can be provided for long-term stability of edge water gas reservoirs.

Description

technical field [0001] The invention relates to the technical field of oil and natural gas development, in particular to a method for predicting water breakthrough time in edge water gas reservoirs. Background technique [0002] In the development of water drive gas reservoirs, the early identification of water intrusion is the premise of making full use of the water-free period for production and actively implementing water control measures. During the whole process of development, formation water monitoring and water invasion dynamic tracking analysis and prediction must be continuously strengthened, gas well allocation should be done according to formation water advancement status, and formation water prevention and control should be further improved, which is conducive to improving the stable production period of gas reservoirs and the ultimate development benefits of gas reservoirs. [0003] At present, there are mainly two kinds of water breakthrough prediction methods...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of low accuracy of water breakthrough time in edge water gas reservoirs predicted by the prior art, and the conventional numerical simulation method requires many parameters and heavy workload, which makes it difficult to meet the needs of early warning of water intrusion in gas wells in edge water gas reservoirs. A Prediction Method of Water Breakthrough Time in Edge Water Gas Reservoirs

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