This is going to depend a bit on how the data are structured. Using Tableau's shapefile datatype, you should be able to visualize the shapes on a map.
For predicting future gas leaks, this is most likely going to require statistical calculations in R to build a predictive model. Details of that process can be found here:
One place to start for basic prediction is to use logistic regression in R to classify samples as likely to fail or not:
Thanks for your suggestions Nathan