![]() ![]() ![]() The base case was chosen to be five wells per section (1,056 ft between wellbores) because of previous work. Reservoir simulation can help determine areas where depletion has not occurred and thus are optimal for potential infill-well development. NPV considerations are important when operators consider either infill drilling or enhanced recovery methods to improve cumulative recovery from reservoirs that have gone through primary recovery. Previous work postulated how infill-well drilling can improve cumulative recovery from shale-gas reservoirs because the distance between wells and the type of completion technique affect the amount of additional possible recovery. IntroductionĪll previously published work using reservoir modeling to ascertain optimal well density assumes idealized conditions: zero well-to-well interference through fracture communication and simultaneous production initiation for all wells. Three scenarios were evaluated: an infill scheme in which future wells are drilled between existing wells, a linear scheme in which future wells are immediate offsets of existing wells, and a hybrid scheme that is a combination of the infill and linear schemes. In this paper, the effect of timing and pattern of well placement on NPV is studied. ![]() Delaying the start of new wells is understood to reduce the net present value (NPV) of a section, but variations in the arrangement of infill wells have not been examined thoroughly. ![]()
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