Liu, Jiayi

Collaborating Authors

Liu, Jiayi

Abstract In the past decade, the operators and service companies are seeking an integration solution which combines engineering and geology. Since our drilling wells are becoming much more challenging than ever before, it requires the office engineer not only understanding well construction knowledge but also need learn more about geology to help them address the unexpected scenarios may happen to the wells. Then a novel solution should be provided to help engineers understanding their wells better and easier in engineering and geology aspects. The digital twin technology is used to generate a suppositional subsurface world which contains downhole schematic and nearby formation characteristics. This world is described in 3D modelling engineers could read all the information they need after dealt with a unique algorithm engine. In this digital twin subsurface world, the engineering information like well trajectory, casing program, BHA (bottom hole assembly) status, are combined with geology data like formation lithology, layer distribution and coring samples. Both drilling or completion engineers and geologist could get an intuitive awareness of current downhole scenarios and discuss in a more efficient way. The system has been deployed in a major operator in China this year and received lot of valuable feedback from end user. First of all, the system brings solid benefits to operator's supervisors and engineers to help them relate the engineering challenges with according geology information, in this way the judgement and decision are made more reliable and efficiently, also the solution or proposal could be provided more targeted and available. Beyond, the geology information from nearby wells in digital twin modelling could also provide an intuitional navigation or guidance to under-constructed wells avoid any possible tough layers via adjusting drilling parameters. This digital twin system breaks the barrier between well construction engineers and geologists, revealing a fictive downhole world which is based on the knowledge and insight of our industry, providing the engineers necessary information to support their judgement and assumption at very first time when they meet downhole problems. For example, drilling engineers would pay extra attention to control the ROP (rate of penetration) while drilling ahead to fault layer at the first time it is displayed in digital twin system, which prevent potential downhole accident and avoid related NPT (non-production time). The integration of engineering and geology is a must-do task for operators and service companies to improve their performance and reduce downhole risks. Also, it provides an interdisciplinary information to end user for their better awareness and understanding of their downhole asset. Not only help to avoid some possible downhole risks but also benefit on preventing damage reservoir by optimizing the well construction parameters.

OnePetro

doi: 10.2118/214625-MS

SPE

SPE-214625-MS

SPE/IADC Middle East Drilling Technology Conference and Exhibition

Country: Asia > China (0.48)

Genre: Overview (0.47)

Industry: Energy > Oil & Gas > Upstream (1.00)

Oilfield Places:

Asia > China > Sichuan > Sichuan Basin > Southwest Field > Longwangmiao Formation (0.99)
North America > United States > South Dakota > Williston Basin > Bakken Shale Formation (0.98)
North America > United States > North Dakota > Williston Basin > Bakken Shale Formation (0.98)
North America > United States > Montana > Williston Basin > Bakken Shale Formation (0.98)

SPE Disciplines:

Well Drilling > Drilling Operations > Drilling optimization (0.67)
Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (0.49)
Data Science & Engineering Analytics > Information Management and Systems > Artificial intelligence (0.47)

Technology:

Information Technology > Artificial Intelligence (0.69)
Information Technology > Data Science (0.47)

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Numerical Study on the Effect of Wing Position Lifting on the Motion Performance of a Hybrid-Driven Underwater Glider

Yu, Pengyao (College of Naval Architecture and Ocean Engineering, Dalian Maritime University) | Wu, Xiangcheng (College of Naval Architecture and Ocean Engineering, Dalian Maritime University) | Lin, Xiaohan (College of Naval Architecture and Ocean Engineering, Dalian Maritime University) | Liu, Jiayi (College of Naval Architecture and Ocean Engineering, Dalian Maritime University) | Lin, Yi (CNNP Oceanic Nuclear Power Development Co., Ltd)

OnePetroJune, 2022

ABSTRACT A hybrid-driven underwater glider (HUG) is a new type of unmanned underwater vehicle which combines the advantages of traditional underwater gliders (UGs) and autonomous underwater vehicles (AUVs). In this paper, a new design scheme, equipping a foldable wing module on the top of the HUG, is proposed to reduce the drag force generated by the wing in AUV mode. And the effect of wing position lifting on the motion performance in UG mode is studied by computational fluid dynamics (CFD) methodology and motion simulation. The results show that the wing lifting reduces the lift force of the glider and increases the drag force. But the wing lifting makes the movable block movement distance smaller, which is required for the glider to reach the target gliding angle. INTRODUCTION An underwater glider (UG) is a special type of autonomous underwater vehicle which is controlled by adjusting its buoyancy. For the characteristics of low energy consumption, low cost and long range, several typical UGs have been developed and broadly applied in physical and biological oceanography, such as Slocum (Webb, 2001), Spray (Sherman, 2001) and Seaglider (Eriksen, 2001). The gliding speed of traditional UGs is usually very slow, and a thruster is sometimes added to improve the speed. The UG equipped with a thruster is usually called the hybrid-driven underwater glider (HUG). When the thruster is working, the HUG has higher velocity, but the wing produces much drag force. So, a new design scheme, equipping a foldable wing module on the top of the HUG, is proposed to reduce the drag force in this paper. There is no doubt that the change of wing structure will affect the gliding motion performance of the glider. And some scholars have studied these effects. Shankar and Vijayakumar (2020) studied the effect of wing position on the hydrodynamic characteristics of a UG by computational fluid dynamics (CFD) methodology. The results show that positioning the wing at the farthest point aft improves the performance of the glider but the increase is very small and visible at higher attack angle. Javaid (2017) studied the effect of wing form on the hydrodynamic characteristics of a UG. The results show that the glider with rectangle wings has higher lift force and drag force than the glider with tapered wings due to a larger wetted area. Zhang (2014) developed a prototype of a gliding robotic fish with two types of wings with the same wingspan but different aspect ratios. The results show that the larger wings result in shallower gliding paths but a slower gliding speed compared with the smaller wings. Liu (2014) designed an orthogonal test to study the impact of wings on the movement efficiency and stability of a HUG. The results show that the chord length has the most remarkable effect on the movement efficacy and the sweep angle has the most significant impact on the stability of the HUG.

OnePetro

ISOPE

ISOPE-I-22-253

The 32nd International Ocean and Polar Engineering Conference