Shale gas well re-fracturing well selection evaluation method

Abstract

The invention relates to the technical field of re-fracturing well selection, in particular to a shale gas well re-fracturing well selection evaluation method. The shale gas well re-fracturing well selection evaluation method comprises the following steps that S1, a near pressure transporting well is selected to be a re-fracturing target well from all production wells in a shale gas field; S2, shale gas well re-fracturing well selection evaluation indicators are optimized, S3, quantitative evaluation indicators are carried out to a single well one by one, and a target well is optimized; and S4, a well with a high yield-increasing potential is optimized to be subjected to repeated fracturing. The shale gas well re-fracturing well selection evaluation method can achieve a goal that the re-fracturing target well with the high yield-increasing potential can be quickly and reasonably optimized from hundreds of shale gas wells, so that the efficiency of single well repeated fracturing is improved, and the technical reference is provided for developing the shale gas reservoir reasonably and effectively.

Description

technical field [0001] The invention relates to the technical field of well selection for repeated fracturing, in particular to an evaluation method for well selection for repeated fracturing of shale gas wells. Background technique [0002] Well selection for refracturing has always been an important research content along with the development of refracturing technology, and the correct selection of target wells for refracturing is a key step that determines the success or failure of refracturing. Optimizing well selection for refracturing is the prerequisite for better effects of fracturing stimulation measures in oil and gas fields, and has great significance for the success of refracturing. There are many influencing factors considered in well selection for refracturing, and there is a very complex nonlinear relationship between each factor, which has caused great trouble to the well selection analysis. [0003] There are many methods for refracturing well selection in ...

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Problems solved by technology

Completion coefficient and reservoir quality index only consider geological factors, and the well selection method does not consider the influence of production and construction factors, which may make the selection of target wells inaccurate, thus failing to achieve the stimulation effect of single well refracturing

[0007] 2. The fracture height parameter is considered in the well completion index formula. Since gas wells are generally produced by deployment, fixed output and constant pressure, the calculated fracture height data does not fully conform to the actual fracture height of shale gas wells in the state of spontaneous flow.

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