Study on the Separation Technology of HGS
and Its Effect on the Temperature Field
of the Wellbore During the Multi-gradient
Drilling in Deep Water
Ruiyao Zhang 1 , Jun Li 1(B) , Gonghui Liu 1,2 , Ting Yue 1 , Hongwei Yang 1 ,
and Hailong Jiang 1
1 China University of Petroleum-Beijing, Beijing 102249, China
1432679705@qq.com, junlicup@163.com, lgh1029@163.com,
1242316193@qq.com, 1539073021@qq.com, 842754542@qq.com
2 Beijing University of Technology, Beijing 100192, China
Abstract. The accurate prediction of annulus temperature is very important during multi-gradient pressure control drilling by the injection of HGS (hollow glass
sphere) in deep water. In this paper, the separation efficiency of HGS under different influence factors was studied by the combination of new separation technology
and laboratory experiment. Then, considering the influence of HGS separation efficiency on mass transfer and heat transfer process, a transient wellbore temperature
calculation model was established by the coupled heat and mass transfer as well as
the coupled temperature and pressure based on the energy conservation equation,
continuity equation and momentum equation. The model was discretized with the
finite difference method and the results calculated with the field data was compared
the field measurement data to verify the accuracy of the model. Finally, the sensitivity analysis of the important factors affecting the wellbore temperature and
thermos-physical parameters was made, such as separation efficiency, injection
rate of the HGS, position of the separator etc. The results are of great reference
significance for multi-gradient pressure control drilling in deep water.
Keywords: Multi-gradient drilling · Laboratory experiment · Separation
efficiency · Heat and mass transfer · Transient heat transfer model
1 Introduction
With the rapid development of modern industry, the demand for petroleum energy
increases rapidly, and deep water area has become a hot spot for exploration and development of global oil and gas resources [1]. However, deep-water drilling faces many
challenges, such as shallow gas, shallow water flow and narrow pressure window, which
will put the drilling process at risk [2]. In particular, the narrow pressure window makes
it difficult to control wellbore pressure, which can easily lead to well kick and even
blowout accidents. In order to deal with these problems, in recent years, scholars have
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
S. N. Atluri and I. Vušanovi´ c (Eds.): ICCES 2020, MMS 97, pp. 139–159, 2021.
https://doi.org/10.1007/978-3-030-64690-5_14
and Its Effect on the Temperature Field
of the Wellbore During the Multi-gradient
Drilling in Deep Water
Ruiyao Zhang 1 , Jun Li 1(B) , Gonghui Liu 1,2 , Ting Yue 1 , Hongwei Yang 1 ,
and Hailong Jiang 1
1 China University of Petroleum-Beijing, Beijing 102249, China
1432679705@qq.com, junlicup@163.com, lgh1029@163.com,
1242316193@qq.com, 1539073021@qq.com, 842754542@qq.com
2 Beijing University of Technology, Beijing 100192, China
Abstract. The accurate prediction of annulus temperature is very important during multi-gradient pressure control drilling by the injection of HGS (hollow glass
sphere) in deep water. In this paper, the separation efficiency of HGS under different influence factors was studied by the combination of new separation technology
and laboratory experiment. Then, considering the influence of HGS separation efficiency on mass transfer and heat transfer process, a transient wellbore temperature
calculation model was established by the coupled heat and mass transfer as well as
the coupled temperature and pressure based on the energy conservation equation,
continuity equation and momentum equation. The model was discretized with the
finite difference method and the results calculated with the field data was compared
the field measurement data to verify the accuracy of the model. Finally, the sensitivity analysis of the important factors affecting the wellbore temperature and
thermos-physical parameters was made, such as separation efficiency, injection
rate of the HGS, position of the separator etc. The results are of great reference
significance for multi-gradient pressure control drilling in deep water.
Keywords: Multi-gradient drilling · Laboratory experiment · Separation
efficiency · Heat and mass transfer · Transient heat transfer model
1 Introduction
With the rapid development of modern industry, the demand for petroleum energy
increases rapidly, and deep water area has become a hot spot for exploration and development of global oil and gas resources [1]. However, deep-water drilling faces many
challenges, such as shallow gas, shallow water flow and narrow pressure window, which
will put the drilling process at risk [2]. In particular, the narrow pressure window makes
it difficult to control wellbore pressure, which can easily lead to well kick and even
blowout accidents. In order to deal with these problems, in recent years, scholars have
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2021
S. N. Atluri and I. Vušanovi´ c (Eds.): ICCES 2020, MMS 97, pp. 139–159, 2021.
https://doi.org/10.1007/978-3-030-64690-5_14