DRILLING OPTIMIZATION METHOD BASED ON STOCHASTIC DRILLING MODEL

The drilling optimization mathematical model based on the determinate drilling model has its certain limitations due to the stochastic affect which has not taken into consideration,so the drilling reliability optimization mathematical model is established on the basis of stochastic drilling model.The drilling program designed by referrence to this model provides with maximum reliability.This means the drilling operation can be accomplished under the maximum probability of reliability.Since 1989,this technique has been widely used in Daqing oil field,resulting in the average increase of drillins rate of 30% and average decrease of drilling cost per meter of 7.5%.This research project receives the first award of scientific technology progress of the Daqing Petroleum Administration in 1991.