Abstract
The aim of this work is to reveal causes of unprofitable horizontal tailing-in well operation, their further ranking according to the degree of influence, and developing reactive and pro-active measures on increasing efficiency of wells in operations as well as planned wells. During this work the retrospective analysis of horizontal termination well operation stock (horizontal well, horizontal sidetrack, horizontal drainhole well), and the analysis of current state were carried out. The influence of the conducted wellbore interventions on economic efficiency of well operations was estimated. According to the results, obtained in the research, the main direction of works on increasing efficiency will be scenario approach to planning investments at the wells. It must be considered future (potential) wellbore interventions at the wells as an integral part of well operation. It is necessary to calculate total investment attractiveness of projects on oil extraction, including the following elements: well construction; operation; in-flow stimulation; water suppression; effects via injection well stock; abandoning. Such approach to planning investments will allow to carry out correct comparative assessment of the existing well operations and repairs technologies with new ones which can push up the cost of separate subprojects, but at the same time enhance its investment attractiveness.
Published Version
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