The Research On Reservoir Protection In Gas Well Completion

Natural gas reservoirs are distributed widely in Jilin oilfield with many gas reservoir types. Reservoir damage factors are complex to different types of gas reservoirs. Reservoir damages can be easily caused in the operation of gas well. With the deepening of natural gas exploration and development of Jilin oilfield, reservoir protection problems gradually increase in the completion operation of gas well. In order to reduce reservoir damage in the operation of gas well, technological researches of anti-pollution operation in natural gas well need to carry out.Research system evaluates reservoir sensitivity characteristics of different types of natural gas reservoir in Jilin oilfield. Aiming at characteristics of reservoir sensitivity and operation conditions, reservoir protection technologies are optimized and chosen. Firstly,according to large-scale fracturing in new well, research and form completion technology with snubbing service, after completion, quickly back flow fracturing fluid, fundamentally avoids reservoir pollution; secondly, aiming at measures and operation of maturing gas well with medium and shallow reservoir depths, by studying and develop killing fluid with low cost and low pollution to reduce reservoir damage in the operation of old wells; thirdly,according to start-up and operation of new well with medium and shallow reservoir depths,apply series of integrated technologies of production and completion, simplify operation sequences and shorten occupation time of oil well to reduce reservoir pollution.This research has been applied efficiently in the oilfield, has achieved good effect。This study to solve fundamentally the reservoir pollution on gas well,and the problem of gas production seriously reduce after completion。This research has been used over 200 once,the gas well production all have been recover。The subsequent development of gas reservoir in Jilin oilfield has played a certain reference role。...