Salt bed of great thickness horizontal drilling technology in Uzbekistan

The Luke Drilling Project of haowuzhake Oilfield in Uzbekistan involves two technical problems in both long-reach drillingand drilling in salt bed of great thickness. There is no such a precedent under similar circumstance, and we have no precedent to go byfrom other domestic oilfields. There are a lot technical problems demanding prompt solution. The paper analyzes the technical characteristicsof horizontal drilling in salt bed of great thickness, studies the optimization technology of well trajectory and wellbore configurationfor long-reach well, the control technology of well trajectory for long-reach well, the stability technology of borehole wall in salt bed ofgreat thickness, the friction-reduction technology for long-reach well, and the prevention technology for complex accident. On the basisof the above technologies, the long-reach horizontal drilling technology in salt bed of great thickness is developed. The directional whipstockingand well trajectory control are achieved in salt bed of high purity with TVD of almost 400 m. The controlled intervals in slat bedamount to 1000 m. The long-reach well 173G with bottom horizontal displacement of 1500 m is drilled, and the horizontal interval is 686m. The successful drilling in the well may be good reference to the long-reach well drilling in salt bed of great thickness.