TY JOUR TI Improving the accuracy of wellbore positional at the Russkoe field: Application of the “Survey Management” service using the multi-station analysis MSA KW Multi-Station Analysis (MSA) KW Survey Management (SM) KW Ellipse of uncertainty (EOU) KW Separation Factor (SF) KW positional uncertainty KW dense drilling patterns KW directional survey. JO Vestnik AGGE AU Generalov, D.O. PY 2026 IS PB Association of Geologists, Geophysicists and Engineers