Abstract
Horizontal multi-fractured wells nowadays are the most common way of low-permeability reservoirs exploitation either in Russian and foreign oilfields. Besides its high efficiency such completion has a lot of factors (usually undefined) which can together significantly decrease oil rate. Here some of them are listed:
Drilled horizontal well length and producing well length
Number of created and producing fractures
Fracture length by design and by the actual production and well-test
Fracture location in relation to well (azimuth and initialization interval).
Interference between neighborhood wells through the fractures during injection and production
Etc.
The paper deals with most interesting parts of a complex project which purpose is to realize the multi-fractured well potential and production system diagnostics. There are three main issues in this paper:
Designing – filed-sector choosing, optimum spacing and well completion calculations
Realization – well construction and studies conduction
Analysis – comparison between new project wells and common wells in the neighborhood, geological and hydrodynamic model correction
Current primary project result is a significant exploitation system efficiency growth after a change of well and fracture directions (perpendicular to the wellbore). The secondary but anyway very important results are learned lessons and new competences in well construction and studies.
