Reducing the negative impact of high density killing solutions on the productivity of gas wells operating Achimov reservoirs. Part 2. Rationale for the use of blocking compositions

Nikulin V.Yu. RN-BashNIPIneft LLC Ufa
Mukminov R.R. RN-BashNIPIneft LLC Ufa
Nigmatullin T.E. RN-BashNIPIneft LLC Ufa
Mukhametov F.H. RN-BashNIPIneft LLC Ufa
Khaziev L.B. RN-BashNIPIneft LLC Ufa
Subkhangulov A.R. RN-BashNIPIneft LLC Ufa
Zakharzhevsky Yu.A. ROSPAN INTERNATIONAL JSC Novy Urengoy
Savchuk D.V. ROSPAN INTERNATIONAL JSC Novy Urengoy
Kurmanchuk N.S. ROSPAN INTERNATIONAL JSC Novy Urengoy
DOI: 10.24412/2076-6785-2023-4-16-21

Abstract
The article considers peculiarities and complications of killing gas wells in Achimov reservoirs (Ach3-4 and Ach5 2-3 formations of Novo-Urengoi and Vostochno-Urengoi license areas) using blocking compositions. The research has shown that suspension blocking compositions thickened with xanthan and starch are applicable for blocking of the bottom-hole zone in the presence of hydraulic fractures and withstand repression of no less than 14 MPa. The prospects of continuing research of blocking compositions thickened with surface active substances have been confirmed.

Materials and methods
Rationale for a new technology for killing with bottomhole zone blocking based on international experience and analysis of geological and technical conditions of the Novo-Urengoyskiy and Vostochno-Urengoyskiy license areas. Physical-chemical and filtration studies of high-density blocking compositions in the conditions of the object in question.

Keywords
Urengoyskoe field, well killing, gas wells, abnormally high reservoir pressure, high temperature, fluid loss, blocking compounds, suspensions, modification
Download article