Petrovietnam Journal

Pre-drill pore pressure prediction using seismic interval velocity and wireline log: Case studies for some wells in Cuu Long and Song Hong basins

Van Hoang Nguyen — 2022-09-14

Pore pressure can be obtained from seismic interval velocity by the velocity to pore pressure transform technique. In this paper, the authors present the Eaton experimental method to calculate pore pressure for some wellbores in the Cuu Long and Song Hong basins, where complex processes of subsidence, burial, geological transformation, and geothermal activity took place, causing abnormal pressure zones.
The obtained results show that the pore pressures calculated from the seismic interval velocity data are closely correlated with the values measured by well logging methods and the density of the drilling fluids. Therefore, using seismic interval velocities to calculate pore pressure values, identify and predict abnormal zones by the Eaton method can be effectively applied in frontier areas to improve safety, reduce risks while drilling.

Study on the preparation of PVChem MgO expansive additive and a recipe of cement slurry to prevent gas migration and channelling

Anh Trung Kieu — 2022-09-14

During the process of cementing, MgO-based expansive additives are widely used to increase bond and adhesion of the cement stone annulus with the wellbore and casing. Under the high-temperature condition of the bottom hole area, the additives help prevent gas channelling and migration in the well.
The paper presents the results of a study on the preparation of the PVChem MgO expansion additive based on the magnesite ore from Kong Queng mine (Gia Lai province). The analyses of density, water separation, water discharge, rheological properties, thickening time and strength of cement stone then showed that adding 0.75% PVChem MgO expansion additive into the cement slurry mixture prevents gas ingress and migration effectively.

An economic model to manage the production of Petrovietnam’s oil and gas projects

Van Thuan Doan — 2022-09-14

Managing Petrovietnam's oil and gas production projects both domestically and abroad requires efficient tools to support timely decision-making in an accurate response to market volatility and other risk factors.
The article introduces an economic model built and developed in accordance with the characteristics of Petrovietnam’s oil and gas projects, which is a tool to help management agencies and oil and gas enterprises improve the efficiency of portfolio management against fluctuation of input factors.

Analysing the spatial distribution of land surface temperature at Nghi Son Refinery and Petrochemical Complex using Landsat and Sentinel 2 satellite image data

Le Hung Trinh — 2022-09-14

The Landsat 5, Landsat 8 and Sentinel 2A satellite image data are used for extracting land surface temperature, thereby mapping the spatial distribution of land surface temperature at Nghi Son Refinery and Petrochemical Complex. The obtained results then can be used in monitoring land surface temperature changes, for land use planning as well as in minimising the impact of production processes to the environment.