Shale gas well yield prediction method

Abstract

The invention discloses a shale gas well yield prediction method, which comprises the following steps that: S1: according to a shale gas well analysis model, constructing the double logarithmic plateof theoretical model data; S2: obtaining the actual measurement data of a shale gas well to be analyzed, and constructing the double logarithmic plate of data according to the actual measurement data;S3: carrying out fitting on the double logarithmic plate of theoretical model data and the double logarithmic plate of the actual measurement data, an determining the yield prediction model parameterof the shale gas well to be analyzed; and S4: according to a preset shale gas well yield prediction model and the yield prediction model parameter of the shale gas well, determining the prediction yield of the shale gas well to be analyzed. The method is suitable for the shale gas well with irregular cracks, parameter input reliability during yield prediction is improved, the accuracy of a yieldprediction result is guaranteed, and the method performs an important function on evaluating the fracturing transformation effect, the production dynamics and the economic benefit of the shale gas well.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a method for predicting the production of shale gas wells. Background technique [0002] Shale gas is an unconventional natural gas that occurs in organic-rich shale and its interlayers, mainly in adsorption and free states, and is mainly composed of methane. Shale gas is often distributed in thicker and widely distributed shale source rock formations in the basin. Different from conventional reservoir gas reservoirs, shale is not only the source rock for natural gas generation, but also the reservoir and caprock for accumulating and preserving natural gas. Therefore, black shale and high-carbon mudstone with high organic matter content are often the best shale gas developmental conditions. [0003] Due to the low permeability of shale gas reservoirs, it is difficult to exploit them, and horizontal well drilling and multi-stage fracturing technol...

AI Technical Summary

Problems solved by technology

Due to complex factors such as multi-scale flow mechanism coupling, fracture shape identification, interaction between artificial fractures and natural fractures, flow field diagnosis, etc., the production prediction of shale gas wells is difficult, with many uncertain factors and poor accuracy.

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