SAND CONTROL SYSTEM WITH MULTILAYER GRAVEL PACK FOR HOT - RECOVERY CASING WELLS
Gravel packing sand control completion process is aimed at productive formation and loose formation and easy sand production well.
Gravel packing operation is carried out at the early stage of completion. Gravel packing is used between screen tube and casing (perforation) shaft wall to fill it, forming a continuous and stable high strength sand body, preventing formation sand from migrating to the wellbore, thus solving the problem of sand production.
A single multilayer gravel pack sand control process is designed to fire multiple oil and gas Wells simultaneously inside the casing, and each layer needs to be filled with sand control completion.In this process, multi-layer sand control tools and service tools can be inserted at one time to set and fill layer by layer. The isolation seal and isolation packer can ensure that the filling fluid will not cross layers.It can realize the gravel pack sand control operation of multiple uneven pay zones under a single string, greatly reducing the completion time.
◎ Tthe packer setting and filling of each layer can be completed in a single well with multiple layers and a single string, so as to improve operating efficiency;
◎ multi-layer sand control tools and service tools are inserted into the pipe string in one trip;
◎ positioning tool locates the filling position to prevent the displacement of the pipe string during filling;
◎ any filling layer shall be isolated from other layers to prevent completion fluid leakage;
◎ after filling each layer, the filling can be tested. If the filling effect is not good, the filling can be repeated.