Study On Limited Entry Fracturing Technology Of Multiple Thin Layer In Third Encryption Well

The limited entry fracturing technology is a main way to stimulate low permeability andthin reservoir,whose key design is the optimization of perforation project. The traditional wayis that the perforation amount is determined by depth of each layer,then the fluid amount andsand amout are computed prorata by perforation amount during the construction.However,theeffect is not considered in this method,such as the physical property has an effect upon thefracturing result and perforation amount、crack disturbance during the construction,and thedegree of difficultly or easily fracturing has an effect upon the fluid amount of each layer.In this article, after the experiment that the sand amount and construction displacement areincreased in third encryption well, the optimal amount of sand and construction displacementcan be concluded,and the interference between fracture of different depth of interlayer in thelimited entry fracturing also can be summarized in third encryption well.After adjusting therank of fracturing tubing string and independent segment group,the difficultly fracturingreservoir can be made best use of.At last new techniques such as fracturing fluids of lowdamage、bridging jack and etc.are tested in third encryption well.it finished an individualdesign proposal of limited entry fracturing technology of Multiple thin layer in thirdencryption well of Xingnan development area.