This course provides in-depth background and state-of-the-art tools necessary to maximize the performance of Horizontal wells. Practical examples will illustrate how candidate horizontal wells are selected and designed using multi-disciplined team efforts to ensure both technical and economic benefits are maximized. Methods used to predict well performance; such as, expected producing rate, drainage area, and fluid coning will be explained through class problems. Optimization of Multi-stage Fracing of Horizontal Wells (MFHW), including the number frac stages, spacing between the frac stages, size of the fracs, and how to take advantage of the “sweet spots”, will be illustrated using advanced software. Mini frac benefits to improve the frac design, including test interpretations; pre-closure and post closure data. The art of well test interpretations and the challenges of evaluating the performance of MFHW’s will be discussed for various formations including tight oil (Cardium, Pekisko, Bakken, Spearfish, etc…), shale gas (Horn River, Duvernay, Barrent), and tight gas (Montney, Doig, Baldonnel).