Physical and Numerical Modeling of the Stability of Deep Caverns in Tahe Oil Field in China

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doi:10.3390/en10060769

A Physical and Numerical Modeling for Launching of Jackets (Case Study on Balal PLQ Platform)

Journal of Offshore Mechanics and Arctic Engineering ◽

10.1115/1.2904714 ◽

2008 ◽

Vol 130 (3) ◽

Cited By ~ 2

Author(s):

M. R. Honarvar ◽

Moharam D. Pirooz ◽

Mohammad R. Bahaari

Keyword(s):

Numerical Modeling ◽

Physical Modeling ◽

Oil Field ◽

Physical Models ◽

Lower Viscosity ◽

The Difference ◽

The Stability ◽

Stability Of Structures ◽

Similarity Laws

Platform structures are commonly utilized for various purposes including offshore drilling, processing, and support of offshore operations. A jacket is a supporting structure for deck facilities, stabilized by piles driven through it to the seabed. In a jacket design, operational and environmental loads are very important and must be intensively investigated to secure the stability of structures during their service life, as well as installation phase. The main purpose of this research is to evaluate the results of physical modeling for the launch operation of jackets from barge into the sea, as the most hazardous stage in the installation of a platform, and compare them to those of numerical modeling. Both physical and numerical modeling parameters are described and they are examined on a prototype platform, i.e., Balal oil field production and living quarter platform that is a 1700 tone, eight-legged jacket located in the center of Persian Gulf, some 100km distance from Iranian Lavan Island. It is found that both numerical and physical methods can describe the motion of the barge similarly well, but some differences are traced in the motion of jacket. The inequalities are, then, appeared to be due to the Froude-type parameters applied for modeling purpose. One notable fact investigated in this research is the necessity for choosing Reynolds–Froude type in the physical modeling of the launch, instead of Froude type. This is because, in addition to the importance of gravitational and inertial forces, the viscosity affects the drag hydrodynamic force, as well. It should be noted that viscosity and consequently drag coefficient in Froude type modeling cannot be quite applicable and this causes the difference observed between the results of physical and numerical modeling. Although there have been so many jacket launching designed and probably their physical models have been tested, but to the best of our knowledge from the literature, there was found no study on Reynolds–Froude physical modeling of jacket launch phenomenon. If one is interested in practicing a Reynolds-Froude physical modeling, it could be done either in a centrifuge test or by using a fluid with lower viscosity dependent on the scale of model, or even by finding a fluid (with new viscosity and new density) and a new gravity to have simultaneously the Froude and the Reynolds similarity laws satisfied.

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A Physical and Numerical Modeling for Launching of Jackets: Case Study on Balal PLQ Platform

Volume 1: Offshore Technology; Special Symposium on Ocean Measurements and Their Influence on Design ◽

10.1115/omae2007-29023 ◽

2007 ◽

Author(s):

M. R. Honarvar ◽

Moharram D. Pirooz ◽

Mohammad R. Bahari

Keyword(s):

Numerical Modeling ◽

Physical Modeling ◽

Oil Field ◽

Knowledge Based ◽

Lower Viscosity ◽

Operational Life ◽

The Difference ◽

The Stability ◽

Stability Of Structures

Platform structures are commonly utilized for various purposes including offshore drilling, processing and support of offshore operations. A jacket is a supporting structure for deck facilities stabilized by leg piles through the seabed. In a jacket design, operational and environmental loads are very important and must be investigated intensively to secure the stability of structures during their operational life, as well as installation phase. The main purpose of this research is to evaluate and compare the results of physical and numerical modeling for the launch operation of jackets from barge into the sea, as the most hazardous stage in the installation of a platform. Both physical & numerical modeling basics are described and they are performed on Balal PLQ (Production and Living Quarter) platform that is one 8-legged, 1700-tone main jacket of Balal oil field, located in the center of Persian Gulf, some 100 kms distance from Iranian Lavan Island. It is found that both methods can describe the motion of the barge similarly well, but some differences are traced in the motion of jacket. Then, the inequalities are evaluated to be due to the Froude-type parameters chosen for modeling purpose. The most important result achieved in this research is the necessity of choosing Reinolds-Froude type for physical modeling of launching, instead of Froude-type. This is due to the effect of viscosity in drag hydrodynamic force in addition to the importance of gravitational and inertial forces. It should be noted that viscosity and consequently drag coefficient in Froude type modeling is not quite correct and causes the difference between the results of physical and numerical modeling. To our knowledge, based on the surveyed done in the literature, although there was no results found on the physical modeling of jacket launch to be addressed, but it seems that Reynolds-Froude modeling could be done either in a centrifuge test or by using a fluid with lower viscosity dependent on the scale of model.

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The structure improved design of rod load reducer in Tahe oil field

Manufacture Engineering and Environment Engineering ◽

10.2495/meee131522 ◽

2013 ◽

Author(s):

Zhiqiang Huang ◽

Liyan Liu ◽

Qin Li ◽

Chengsong Qiu ◽

Yachao Ma

Keyword(s):

Oil Field ◽

Improved Design ◽

Tahe Oil Field

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Hydrocarbon charging histories of the Ordovician reservoir in the Tahe oil field, Tarim Basin, China

Journal of Zhejiang University SCIENCE A ◽

10.1631/jzus.2004.0976 ◽

2004 ◽

Vol 5 (8) ◽

pp. 976-978 ◽

Cited By ~ 1

Author(s):

Chun-quan Li ◽

Hong-han Chen ◽

Si-tian Li ◽

Xi-ming Zhang ◽

Han-lin Chen

Keyword(s):

Tarim Basin ◽

Oil Field ◽

Hydrocarbon Charging ◽

Ordovician Reservoir ◽

Tahe Oil Field

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Research on Factors and Model of Water Production of Bottom Water Reservoir

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.594-597.2590 ◽

2012 ◽

Vol 594-597 ◽

pp. 2590-2597

Author(s):

Liang Zhang ◽

Yi Zuo Shi ◽

Chang Hui Yan ◽

Xiao Xiong Wu ◽

Pan Zhao ◽

...

Keyword(s):

Bottom Water ◽

Water Reservoir ◽

Oil Field ◽

Control Measures ◽

High Yield ◽

Oil Well ◽

Water Production ◽

Mode Water ◽

Production Mode ◽

Tahe Oil Field

In block one of Tahe oil field, the Triassic Lower Oil Formation sand with a low-amplitude anticline has a characteristic of bottom water reservoir and a uniform oil/water contact, bottom water is energetic, natural water drive, rock and fluid depletion drive. With the continuous development, oilfield has entered high water cut stage, bottom water coning is significant, oil well has rising of the water content and production decline. Summarized influencing factors of water production and water production mode in block one of Tahe oil field. According to water production factors of oil well, we draw four kinds of water production mode: water production mode of tectonic position, water production mode of poor fault-sealing prediction, water production mode of developed into inter-layers, water production mode of high specific inflow segments. Putting forward four kinds of water production mode provide a theoretical basis to control measures for high yield water of later oil well.

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The composition of acid/oil interface in acid oil emulsions

Petroleum Science ◽

10.1007/s12182-020-00447-9 ◽

2020 ◽

Vol 17 (5) ◽

pp. 1345-1355

Author(s):

Yulia M. Ganeeva ◽

Tatiana N. Yusupova ◽

Ekaterina E. Barskaya ◽

Alina Kh. Valiullova ◽

Ekaterina S. Okhotnikova ◽

...

Keyword(s):

Hydrochloric Acid ◽

Oil Field ◽

Field Equipment ◽

Oil Emulsion ◽

Acid Oil ◽

Field Development ◽

Intermediate Layers ◽

Acid Sludge ◽

Oil Emulsions ◽

The Stability

Abstract In well stimulation treatments using hydrochloric acid, undesirable water-in-oil emulsion and acid sludge may produce and then cause operational problems in oil field development. The processes intensify in the presence of Fe(III), which are from the corroded surfaces of field equipment and/or iron-bearing minerals of the oil reservoir. In order to understand the reasons of the stability of acid emulsions, acid emulsions were prepared by mixing crude oil emulsion with 15% hydrochloric acid solutions with and without Fe(III) and then separated into free and upper (water free) and intermediate (with water) layers. It is assumed that the oil phase of the free and upper layers contains the compounds which do not participate in the formation of acid emulsions, and the oil phase of the intermediate layers contains components involved in the formation of oil/acid interface. The composition of the oil phase of each layer of the emulsions was studied. It is found that the asphaltenes with a high content of sulfur, oxygen and metals as well the flocculated material of protonated non-polar oil components are concentrated at the oil/acid interface. In addition to the above, in the presence of Fe(III) the Fe(III)-based complexes with polar groups of asphaltenes are formed at the acid/oil interface, contributing to the formation of armor films which enhance the emulsion stability.

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Effects of Low Level Graded I-Layer Doping on the Stability of A-SI:H Solar Cells

MRS Proceedings ◽

10.1557/proc-258-887 ◽

1992 ◽

Vol 258 ◽

Cited By ~ 6

Author(s):

D. Fischer ◽

N. Pellaton ◽

H. Keppner ◽

A. Shah ◽

C. M. Fortmann

Keyword(s):

Numerical Modeling ◽

Solar Cells ◽

Electric Field ◽

Conversion Efficiency ◽

Red Light ◽

Degradation Behavior ◽

Low Level ◽

Carrier Collection ◽

The Stability ◽

Light Conversion Efficiency

ABSTRACTThis work reports on attempts to tailor the electric field of a-Si:H solar cells by the graded low-level doping of the intrinsic layer to optimize conversion efficiency in the degraded state. Based on wavelength dependent collection measurements and numerical modeling, the degradation behavior of doped and undoped cells is explained in terms of the interaction of dopants and the light-induced space-charge. Low level doping is shown to shift the electric field away from the p/i interface towards the bulk of the i-layer. This results in a better carrier collection from the back part of the solar cell, and solar cells with improved stabilized red light conversion efficiency can be realized. These cells can be readily applied as bottom cells of stacked solar cells.

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