Sand Washing And Plugging Removal From Outside Tube And Sand Control Integration Technology For Horizontal Wells

With the extensive application of horizontal wells and extend the production time in oilfield development, horizontal wells there have been many problems in production management, work over job, string treatment and stimulation measures to implement ineffective, and many other issues, especially late due to blockage resulting in a sharp decline in production problems staggering, the sand control of horizontal wells and supporting technologies become Dongxin oilfield EOR unconsolidated sandstone reservoir, an important means to draw on reserves rate, stable production and reservoir management to achieve old goals.Formation of this article appeared fine sand clogging large number of applications for the current oilfield open hole screen sand horizontal wells producing in the late, systematically studied the outside of horizontal pipe blockage and sand washing sand control integration technology. On this basis, and then secondary sand, prevent the possibility of a fundamental re-annulus open hole is blocked formation of fine sand.Studied the outside the pipe blockage and sand washing pipe segment out gravel pack integration technology. Use a flush valve as pipe sand washing and gravel pack outside the channel, combined the outside sand washing, broken down and gravel fill, convenient for operation and application.In view of the open hole sieve tube horizontal well washing valve cannot be used, studied outside sand washing pipe blockage and pipe segment out filling and the integration technology of gravel pack inside. In the oil well horizontal section at the bottom of the perforated small hole, as a communication shaft and external annular channel, complete the broken down and sand washing progresses, and then to tube perforation gravel pack sand control.During the study of the sand washing and plugging removal from outside tube and sand control integration technology for horizontal wells, the effect of focusing on improving the gravel pack, filling material for horizontal wells, sand-carrying fluid system optimization and construction parameters were related research, the theoretical basis for gravel packing techniques to optimize the construction process of the scene.