Research and application of drilling technologies in junggar basin for neogene ultra-shallow horizontal wells

Abstract

Abstract The ultra-shallow heavy oil reservoir in Chunfeng Oilfield has become an important position in increasing reserves and production. Vertical wells have low production and poor benefits. The development engineering technology of horizontal wells faces many technical problems. Aiming at the drilling problems of ultra-shallow heavy oil horizontal wells, research and application have been carried out from the aspects of drilling engineering optimization design and shallow soft formation trajectory control. Shallow heavy oil cementing and completion and key drilling and completion technologies suitable for the efficient development of ultra-shallow heavy oil in the Neogene of Junggar Basin have been formed. The field application results show that the technology has well supported the development of ultra-shallow heavy oil reservoirs and has accumulated many construction records, such as the shallowest vertical depth, the largest vertical ratio, and the shortest drilling and completion period. The new production capacity of 50 thousand tons has strongly supported the benefit and production increase of Shengli exploration area in the Junggar Basin.