From a drilling perspective, the transition from single to dual laterals resulted in a reduction in cost of 25% and 19% on a per lateral and per stage basis, respectively. Additionally, the transition from the whipstock casing window to open hole junctures resulted in a 2.5% reduction in well costs, 16% reduction in cycle time between legs 1 and 2, and elimination of the inherent operational risks of the whipstock. The tuning fork design further improved the ease of locating an ideal sidetrack point and increased reservoir access.
In terms of the completion, cost savings of approximately 13% on a per stage basis were realized from the single lateral to dual lateral design transition. Through continuous fracture design optimization, stimulation treatment efficiencies continued to improve towards 99%. Initial production rates of the dual laterals with an average of 36 stages demonstrated an 85% improvement when compared to single lateral wells with 20 stages. After 6 months, cumulative production from the dual laterals was 65% higher than the single laterals with 20 stages (Figure 3).
Dual laterals have provided a significant step change in program risk management, cycle times, and economics.
Also, through a transition to dual laterals, the impact on the surface footprint remained unchanged, providing an added environmental benefit. Overall, development with open hole dual laterals with the StackFRAC multi-stage system enables operators to transform poor quality resources into economically viable opportunities.