Method of enhanced oil recovery and intensification of production from oil, gas and condensate wells by means of hydromonitor radial overbalance formation penetration

Abstract

The method includes installation in the well of high strength tubing, mechanical anchoring device, turning device, sealing device, deflector; running hydromonitor nozzle, wellbore trajectory control module, navigation system, work coil tubing section, flow re-distribution device, check valve and supply coil tubing section. By fluid supply into annulus between tubing and coil tubing and running coiled tubing, hydromonitor drilling of planned length of controlled radial channel in the formation is performed. Fluid with cuttings coming out the well through annulus between tubing and casing string, cleaned at surface and circulated back. After drilling, the work coil tubing section is retrieved from the formation and well circulation is performed until full carryover of cuttings. By mechanical turning device, the deflector is re-positioned to a different plane; the working cycle is repeated for the next radial channel. Milling of windows for all radial channels is performed beforehand during well preparation stage.

1 . A method of enhanced oil recovery and intensification of production from oil, gas and condensate wells with use of hydromonitor radial overbalance formation penetration, the method comprising the steps of:
 (a) milling of a separate window in a casing string for each radial channel for drilling of a radial channel,   (b) installing, in a well,
 a deflector having an internal channel passing through the deflector, wherein the deflector is configured to be spatially oriented in a lower level of radial channel drilling, 
 a sealing device, 
 a turning device, 
 a mechanical anchoring device, and 
 a high strength tubing, 
   (c) wellhead sealing,   (d) installing downhole equipment, the downhole equipment comprising:
 a hydromonitor nozzle, 
 a wellbore trajectory control module, 
 a navigation system, 
 a work coil tubing section, 
 a flow re-distribution device, 
 a check valve, 
 a supply coil tubing section, 
   (e) supplying fluid into an annulus between the high strength tubing and the supply coil tubing section,   (f) passing the hydromonitor nozzle through the sealing device and through the deflector to contact a rock,   (g) hydromonitor drilling a planned length of the radial channel in a formation using the navigation system and the wellbore trajectory control module, wherein the navigation system is configured to control a position of a wellbore in the formation, wherein the wellbore trajectory control module is configured to ensure wellbore drilling along a designed route,   (h) after drilling in step (g), retrieving the work coil tubing section with the hydromonitor nozzle from the formation,   (i) circulating the fluid in the well until a full carryover of cuttings occurs,   (j) re-positioning the deflector to a different plane via activation of the mechanical turning device,   (k) obtaining and changing a wellbore trajectory during radial channel drilling using the navigation system and the wellbore trajectory control module, and   (l) repeating a working cycle comprising steps (e) (k) for a further radial channel.   
     
     
         2 . The method of  claim 1  further comprising drilling a further level of radial channels after step (l) comprising the steps of:
 (m) retrieving the supply coil tubing section and the work coil tubing section from the well, 
 (n) unsetting the mechanical anchoring device with the high strength tubing, 
 (o) retrieving a tubing landing joint, 
 (p) setting the mechanical anchoring device with the high strength tubing, 
 (q) running the work coil tubing section with the navigation system, the wellbore trajectory control module, and the hydromonitor nozzle into the well, and 
 (r) performing steps (d)-(l). 
 
     
     
         3 . (canceled) 
     
     
         4 . (canceled) 
     
     
         5 . The method of  claim 1 , wherein step (e) comprises supplying fluid into the annulus between the high strength tubing and the supply coil tubing section and/or an internal space of the supply coil tubing section.