 In this case, these microfractures are analogous to Griffith Cracks, however they can often be sufficient to supply the necessary productivity, especially after completions, to make what used to be marginally economic zones commercially productive with repeatable success.However, while natural fractures can often be beneficial, they can also act as potential hazards while drilling wells.Natural fractures can have very high permeability, and as a result, any differences in hydrostatic balance down the well can result in well control issues.