Staged Fracturing Technical Study On Horizontal Wells Of Baolige Oilfield Ba 19 Block

Baolige Ba19 fault block is located in Baâ…¡structural belt of southern sag of Bayindulan in the northeast of Erlian Basin Manite depression which lies in the west of Dongwuzhumuqin Banner, inner Mongolia Autonomous Region. Most of the new-drilled horizontal wells have not reached the deliverability requirements, therefore, it is determined to perform staged fracturing reform. Based on the reservoir geology characteristics, reservoir development process, the paper carried out horizontal well ball staged fracturing technology research, including ball launching device and materials research, the effectiveness of the design and calculation of ball stress, block stress and fracture morphology research and so on.Based low temperature, the middle strong water sensitivity reservoir characteristics, take the experimental study of the fracturing fluid, proposed reservoir low damage, low-friction fracturing fluid formulations suitable for Ba19 blocks; and select out low density, moderate intensity ceramic propping system.Combine with design parameters and fracture parameters of Ba19 blocks horizontal wells, completed field fracturing of three horizontal wells, monitored the result by the use of micro-fracture monitoring of four-dimensional crack monitoring, it show the length, the height and the orientation of the crack. The 100% fracturing success rate was obtained in field operation. It acquired well economic benefits and realized the purpose of increasing production.