This study uses analytical models to examine the independent impacts of proppant and fluid on Middle Bakken child well production. Parent wells were defined as having no neighbors within 3000 feet at the time of completion +180 days. A ‘spacing factor’ for the remaining (child) wells was calculated by combining well spacing, producing days, and coverage (‘boundedness’), differentiating less-impacted and more-impacted child wells. Parent wells were assigned an arbitrary spacing factor, allowing their ‘spacing’ to be quantitatively compared to child wells.
Non-linear regressions were performed for each well class to predict five-year production from eight input variables including well log properties and reservoir, drilling, and completion data. The models allowed inspection of variables’ impact on each well class, but for all classes production correlated strongly negatively to water cut and positively to lateral length, proppant-per-foot, and resistivity. In child wells, proppant-per-foot and depth were more important than in parent wells. Fluid-per-foot was of relatively low importance in all models.