Unlike office buildings or large plants with walls, fences and gates, many oilfield work sites have porous and loosely defined perimeters. It is often a challenge for oil & gas companies to ensure safety and enforce compliance to their policies. People may enter and leave such work sites without being accounted for. WellFence helps solve this problem by installing networked check points to identify personnel including service workers & visitors while non-compliant events are followed up and resolved.