Productivity quantitative prediction method based on gas logging information

Abstract

The invention discloses a productivity quantitative prediction method based on gas logging information. The method comprises the following steps: 1, acquiring gas logging and production data; 2, determining an inflow performance equation and converting the yield in sample data into open-flow capacity; 3, analyzing productivity influence factors and determining the productivity influence factors related with open-flow capacity; 4, establishing a neural network prediction model, determining an input node of a neural network according to the productivity influence factors during training and taking the open-flow capacity converted in the step 2 as an output node; 5, calculating predicted open-flow capacity through the neural network model according to to-be-predicted well data; 6, calculating the oil yield according the inflow performance equation and the predicted open-flow capacity. The method is easy to implement, the prediction accuracy of the gas-oil ratio can be improved by sufficiently using content data of various hydrogen components from C1 to C5 (methane to pentane), the gas yield can be calculated according to oil yield and the gas-oil ratio, and the yield of petroleum and natural gas is predicted simultaneously.

Description

Technical field [0001] The invention relates to the field of oil and natural gas exploration and development, and in particular to a method for quantitative prediction of productivity based on gas logging information. Background technique [0002] With the development of the national economy, people are increasingly dependent on oil and natural gas. Oil and gas well reservoir production prediction can guide the formulation of development plans and is also of great significance for avoiding exploration and development risks. [0003] Gas logging is a ground testing technology for natural gas while drilling. It mainly measures and analyzes the composition and content of natural gas in the drilling fluid, and uses chromatographic gas measurement technology to separate, identify and measure the collected gas through a chromatographic column. , You can change C 1 ~C 5 The content of various hydrocarbon components (methane to pentane) is continuously recorded. [0004] At present, the ap...

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Problems solved by technology

At present, there are many methods for predicting oil field production capacity, and the commonly used oil production capacity prediction methods are relatively cumbersome and not convenient enough to use

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