Journal of Petroleum & Environmental Biotechnology

Importance of solubility and bubble pressure models to predict pressure of nitrified oil based drilling fluid in dual gradient drilling

2^nd International Conference and Expo on Oil and Gas

October 27-28, 2016 Rome, Italy

Sajjad Negahban, Wang Ruihe and Sun Baojiang

China University of Petroleum, China

Scientific Tracks Abstracts: J Pet Environ Biotechnol

Abstract:

Gas-lift dual gradient drilling is a solution for deepwater drilling challenges. As well, continuous development of drilling technology leads to increase employment of mineral oil based drilling fluids and synthetic-based drilling fluids, which have adequate characteristics such as: high rate of penetration, lubricity, shale inhibition and low toxicity. The paper discusses utilization of nitrified mineral oil base drilling for deepwater drilling and for more accurate prediction of pressure in DGD at marine riser, solubility and bubble pressure was considered in steady state hydraulic model. The standing bubble pressure and solubility correlations and two new novel models which were acquired from experimental determination were applied in hydraulic model. The effect of the black oil correlations and new solubility and bubble pressure models was evaluated on the PVT parameters such as oil formation volume factor, density, viscosity, volumetric flow rate. Eventually, the consequent simulated pressure profile due to these models was presented.

Biography :

Sajjad Negahban is a PhD student in School of Petroleum Engineering, China University of Petroleum (East China). He has 7 years of experience in oilfields. His PhD research includes study in feasibility of using oil based drilling fluid in gas-lift Dual Gradient Drilling (DGD).

Email: s.negahban@gmail.com