Oil-gas field water scaling tendency predicting system and method

Abstract

The invention discloses an oil-gas field water scaling tendency predicting system and method. According to the oil-gas field water scaling tendency predicting system and method, a placing platform isprovided with a sample preprocessing module, a sample injection module, a water quality analyzing module and a scaling predication module, wherein the sample preprocessing module is used for performing homogenization and impurity removal treatment on a water sample obtained on site; the sample injection module is used for injecting the on-site-collected water sample into the predicting system forwater quality analysis and assay; the water quality analyzing module is used for measuring component content and pH of the purified water sample; the scaling predication module is used for acquiring required parameters from the water quality analyzing module and performing predication according to a pre-established scaling tendency predicting model. The oil-gas field water scaling tendency predicting system and method is automatic in operation, short in analyzing cycle, and capable of avoiding the problems such as sample metamorphosis and scale precipitation, improving the accuracy of analysisresults and achieving timeliness; by computerizing the scaling predicting model, the oil-gas field water scaling tendency predicting system and method can avoid mistakes and personal errors of operators, achieves simplicity and rapidity and improves timeliness and accuracy.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a system and method for predicting water scaling tendency in oil and gas fields. Background technique [0002] Many oil and gas field development practices have shown that when the injected water meets the formation water with high mineral content or the salinity of the flowback water is high, a chemical reaction is likely to occur to produce inorganic salt precipitation, so that there are scales on all parts from the formation to the ground This has caused serious damage to oil layers, well bores, surface pipelines and equipment, and greatly affected normal production and economic benefits. Oilfield scale types are complex, and some scales are hard and dense, difficult to remove, and complex cleaning steps And the cost is relatively large. Therefore, it is necessary to predict the scaling trend of oil and gas field water in advance, and then optimize the s...

AI Technical Summary

Problems solved by technology

[0003] There are two main methods for determining the scaling trend of oil and gas field water. One is the empirical formula calculation method, which is adopted by industry standards and is the most commonly used method in oil and gas field production; the other is calculation by process simulation software. , using the computer to output the results quickly, but some parameters required for the calculation are difficult to obtain on site, and the cost of the forecasting software is high

No matter which method is based on water quality analysis data, it is necessary to collect water samples in advance and send them to the laboratory for analysis and testing, and then manually input parameters for related calculations. The research cycle is long and real-time prediction cannot be realized. Parameter input error

In addition, the water sample transportation process may cause problems such as sample deterioration and precipitation, which will affect the prediction accuracy

Some scales (such as calcium sulfate scale) have multiple crystal forms, which change with changes in water quality, temperature and pressure. The inconsistency between the laboratory environment and the field environment may also cause the water quality analysis data to be inconsistent with the actual situation.

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