Production drivers including reservoir, completion quality, and number and quality of hydraulic fracture stages influence overall production performance of a well. In an integrated engineering study, all production drivers were assumed to be very similar except for the well horizontal lateral length. Well production rate was calculated with horizontal lateral lengths varying from about 1,000 ft to 20,000 ft with an increment of 1,200 ft. Statistical field data and integrated reservoir-wellbore simulation were compared to draw a comprehensive conclusion. Different domain engineering principles were used to understand the impact of increase in lateral length on production performance of horizontal shale wells.