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1. (WO2017039649) SOFTWARE SIMULATION METHOD FOR ESTIMATING FLUID POSITIONS AND PRESSURES IN THE WELLBORE FOR A DUAL GRADIENT CEMENTING SYSTEM

Pub. No.:    WO/2017/039649    International Application No.:    PCT/US2015/048069
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Thu Sep 03 01:59:59 CEST 2015
IPC: E21B 33/13
G05B 17/02
G06F 9/455
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: GUPTA, Gaurav
LOU, Zhuoming
TRIVEDI, Dhaval
Title: SOFTWARE SIMULATION METHOD FOR ESTIMATING FLUID POSITIONS AND PRESSURES IN THE WELLBORE FOR A DUAL GRADIENT CEMENTING SYSTEM
Abstract:
A dual gradient cementing system is modeled in a modeled subsea wellbore. The modeled dual gradient cementing system comprises a plurality of components including a mud lift pump (MLP) coupling a subsea rotating device (SRD) to a surface mud return line, wherein the MPL is located at a subsea depth and the SRD diverts annular fluids from an annulus away from a riser. The modeled dual gradient cementing system is simulated in operation, wherein a fluid loss value of 100% at the subsea depth of the MPL is assumed, and a fluid property of a simulated non-static fluid in the simulated dual gradient cementing system while in operation is estimated. Thereafter, an actual dual gradient cementing operation is performed in an actual subsea wellbore, wherein an actual non-static fluid corresponding to the simulated non-static fluid exhibits the fluid property.