Stress Birefrigence and Thermal Depolarization in Nd:YAG Square Thin Slice Laser Media

Gang, 李刚 Li; Guoying, 冯国英 Feng; Huomu, 杨火木 Yang; Yu, 黄宇 Huang; Shouhuan, 周寿桓 Zhou

doi:10.3788/cjl20103701.0038

Cited by 3 publications

(2 citation statements)

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“…At present [8,9] , the major method adopted in old oil field at home and abroad is that subdivision and recombination is applied to ease the contradiction in inner-layer and interlayer through the analysis of the data of injection profile or permeability contrast or remaining oil distribution, and so on [10] . The thickness of barriers, injection profile, permeability contrast and remaining oil distribution are not considered comprehensively in most methods [11] . Above factors are analyzed comprehensively for YSL well field in this article.…”

Section: Introductionmentioning

confidence: 99%

The Research of Layer System Subdivision and Adjustment Methods in YSL Block of the Low Permeability Reservoirs

Zhang

et al. 2013

AMM

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Layer system subdivision and adjustment is applied in oilfield development to ease the contradiction in inner-layer and interlayer and implement separated layer water flooding well, which is a major adjustment measure to improve developing effects. YSL is a typical low-permeability oil field, whose petrophysics is poor, and which exist many problems, such as apparent contradictions between layers, and poor development effects through separated zone water injection and so on. In this article, the thickness of barriers, injection profile, permeability contrast and remaining oil distribution are analyzed comprehensively. So a reasonable method is also proposed. Much weakness that factors are not comprehensive in adjustment method and that the problems in the development process are not accurately reflected is overcome, which exists in the past methods. The adjustment means can utilize poor thin layers better, reduce invalid water injection and ease the contradictions between layer, and oilfield development effects are improved eventually. It is a reference and guidance for other blocks or oilfield which exist the same problems.

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Section: Introductionmentioning

confidence: 99%

The Research of Layer System Subdivision and Adjustment Methods in YSL Block of the Low Permeability Reservoirs

Zhang

et al. 2013

AMM

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“…At present [7], the major method adopted in old oil field at home and abroad is subdivision and recombination that is applied to ease the contradiction between layers through the analysis of the analysis of the data of injection profile or permeability contrast or remaining oil distribution, and so on [8]. The physical property and thickness of barriers, injection profile, permeability contrast and remaining oil distribution are not considered comprehensively in most methods [9]. Above factors are analyzed comprehensively in this article.…”

Section: Introductionmentioning

confidence: 99%

The Research of Layer System Adjustment Methods in DQY103 Block of the Low Permeability Reservoirs

Yang

Liu

et al. 2012

AMR

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In order to ease the contradiction between layers, layer system adjustment is applied in oilfield development and separated layer water flooding is realized better. This method is a major adjustment measure to improve development effects. DQY103 is a typical low-permeability oilfield and physical property is poor. Many problems are existed, such as apparent contradiction between layers, and poor development effects and so on. In this article, the physical property and thickness of barrier, injection profile, permeability contrast and remaining oil distribution are analyzed comprehensively. A reasonable method is also proposed. Much weakness which exists in the former methods is overcome. For example, factors are not comprehensive and accurately reflected. Poor thin layers are produced better. Invalid water injection and contradiction between layers are decreased. Development effects are improved eventually. It is a reference and guidance for other blocks which exists the same problem.

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Adjustable and stable beam profile generation in a Yb:YAG thin-disk laser

et al. 2020

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We present a Yb:YAG thin-disk laser with an adjustable and stable beam profile. A double-cavity geometry with an acousto-optic modulator (AOM) makes the spatial separation of the gain area, in which the central and external parts are used for L G 00 and L G 01 mode generation, respectively. By changing the loss of the AOM, the beam profile of the primary cavity is adjustable from annularity to flat-top continuously. At input pump power of 44 W, 8.5 W annular, 11.1 W shallow crater-shaped, and 12.1 W flat-topped modes were obtained. Moreover, the thin-disk laser with a multi-pass pumping scheme not only improves thermal management, but also minimizes depolarization loss, allowing the optimization of mode stability and laser performances. This Letter implies that a high-power laser with an adjustable and stable beam profile can be implemented via this scheme.

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Stress Birefrigence and Thermal Depolarization in Nd:YAG Square Thin Slice Laser Media

Cited by 3 publications

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The Research of Layer System Subdivision and Adjustment Methods in YSL Block of the Low Permeability Reservoirs

The Research of Layer System Subdivision and Adjustment Methods in YSL Block of the Low Permeability Reservoirs

The Research of Layer System Adjustment Methods in DQY103 Block of the Low Permeability Reservoirs

Adjustable and stable beam profile generation in a Yb:YAG thin-disk laser

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