Gas well investment evaluation method and device

Abstract

The invention discloses a gas well investment evaluation method and device. The method comprises the following steps: setting a target internal yield rate and an expected target-reaching probability; establishing a normal distribution probability function model of the target internal yield rate with respect to a unit open flow capacity investment based on the sample gas well investment of the sample gas wells, the original open flow capacity of the sample gas wells, and the sample internal yield rate; finding out the critical unit open flow capacity investment corresponding to the expected target-reaching probability according to the normal distribution probability function model; obtaining the unit open flow capacity investment of the gas well to be evaluated according to the gas well investment to be evaluated of the gas well to be evaluated and the original open flow capacity of the gas well to be evaluated; comparing the unit open flow capacity investment of the gas well to be evaluated with the critical unit open flow capacity investment. The method and device may perform investment evaluation after acquiring gas well original open flow capacity and budgeting the investment after oil testing, greatly advances the gas well benefit evaluation time, overcomes the hysteresis of the traditional gas well benefit evaluation, and shortens a gas field development and construction investment decision cycle.

Description

Technical field [0001] The invention relates to the technical field of oil and gas development, in particular to a gas well investment evaluation method and device. Background technique [0002] At present, the domestic oil industry gas well investment project benefit evaluation method is to use the cash flow method to determine whether the gas well is profitable by calculating the internal rate of return within a certain period of time after the gas well is put into production. The industry believes that when the internal rate of return is greater than 12%, gas well investment can be profitable. [0003] Although this method can evaluate the investment benefit of a single well, it is of little significance for gas well investment decision-making. Gas field decision makers always want to judge the investment benefit of gas wells as early as possible, rather than after a certain period of production. Whether the drilling investment and well site construction investment of this well...

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Problems solved by technology

[0003] Although this method can evaluate the investment benefit of a single well, it has little guiding significance for the decision-making of gas well investment. Gas field decision makers always want to judge the investment benefit of the gas well as early as possible, rather than after the gas well has been produced for a certain period of time. Is the drilling investment and well site construction investment of this well profitable?

[0004] Therefore, there is currently a lack of a technology that can judge whether the gas well investment is cost-effective in advance

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