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   Science & Technology Review
2016, Vol.34, No. 7
13 April 2016

Articles
Focus

Foreword
Columns
Scientific Community Promotion
Book Reviews
Perspectives
Scientists
News Around
News Focus
Careers
Special Issues
Special Column of Science
Suggestion
Interview
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Science & Technology Review. 2016, 34 (7): 0-0.
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Science & Technology Review. 2016, 34 (7): 5-6.
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Science & Technology Review. 2016, 34 (7): 8-8.
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Science & Technology Review. 2016, 34 (7): 10-10.
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Science & Technology Review. 2016, 34 (7): 11-11.
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Science & Technology Review. 2016, 34 (7): 152-152.
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Abstract ( 429 )
Foreword

Science & Technology Review. 2016, 34 (7): 1-1.
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Abstract ( 477 )
News Around

Science & Technology Review. 2016, 34 (7): 7-7.
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Abstract ( 450 )
News Focus

Science & Technology Review. 2016, 34 (7): 9-9.
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Abstract ( 419 )
Suggestion

Science & Technology Review. 2016, 34 (7): 12-13.
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Abstract ( 326 )
Special Issues

Science & Technology Review. 2016, 34 (7): 14-19. ;  doi: 10.3981/j.issn.1000-7857.2016.07.001
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Abstract ( 518 )

Science & Technology Review. 2016, 34 (7): 20-25. ;  doi: 10.3981/j.issn.1000-7857.2016.07.002
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Science & Technology Review. 2016, 34 (7): 26-33. ;  doi: 10.3981/j.issn.1000-7857.2016.07.003
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Abstract ( 616 )

Science & Technology Review. 2016, 34 (7): 34-38. ;  doi: 10.3981/j.issn.1000-7857.2016.07.004
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Abstract ( 670 )

Science & Technology Review. 2016, 34 (7): 39-47. ;  doi: 10.3981/j.issn.1000-7857.2016.07.005
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Abstract ( 417 )

Science & Technology Review. 2016, 34 (7): 48-53. ;  doi: 10.3981/j.issn.1000-7857.2016.07.006
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Abstract ( 412 )
Scientists

Science & Technology Review. 2016, 34 (7): 54-55.
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Abstract ( 586 )
Interview

Science & Technology Review. 2016, 34 (7): 56-58.
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Science & Technology Review. 2016, 34 (7): 59-61.
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Science & Technology Review. 2016, 34 (7): 62-63.
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Science & Technology Review. 2016, 34 (7): 64-66.
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Science & Technology Review. 2016, 34 (7): 67-69.
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Abstract ( 213 )
Perspectives

Science & Technology Review. 2016, 34 (7): 70-71.
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Abstract ( 109 )

Science & Technology Review. 2016, 34 (7): 72-74.
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Science & Technology Review. 2016, 34 (7): 75-77.
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Science & Technology Review. 2016, 34 (7): 78-79.
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Science & Technology Review. 2016, 34 (7): 80-81.
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Science & Technology Review. 2016, 34 (7): 82-84.
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Science & Technology Review. 2016, 34 (7): 85-87.
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Abstract ( 654 )
Special Column of Science

Science & Technology Review. 2016, 34 (7): 88-89.
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Abstract ( 285 )
Articles

Quantum control of ionization dynamics of H2+ with an intense two-color field

ZHANG Ji, YAO Hongbin
Science & Technology Review. 2016, 34 (7): 90-93. ;  doi: 10.3981/j.issn.1000-7857.2016.07.007
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Abstract ( 845 )
An efficient scheme for controlling the photoionization of H2+ is investigated by using an accurate 3D time-dependent wavepacket method. Compared with the one-color filed, the ionization probability of H2+ is greatly enhanced in the two-color (790-395 nm) field. By manipulating the relative carrier-envelope phase of the two-color field, the highest asymmetry modulation relative to the laser polarization reaches up to 52% in the ionization of H2+. In our control scheme, the subcycle waveform of the two-color field is manipulated to control the maixmum field amplitudes in the positive and negative directions. The sensitive dependence of the subcycle waveform in the asymmetric ionization of H2+ is explained by tracing the laser-driven motion of the electron in the dressed double well potential. In addition, the basic mechanism behind the enhanced ionization of the molecule is revealed, which provides a practical guide for the optical control of the ionization dynamics in future experiments.

Identification and screening of salinity oil sunflower hybrids and effects of salt stress on the physiological characteristics in the seedling stage

ZHANG Yanfang, SUN Ruifen, GUO Shuchun, HOU Jianhua
Science & Technology Review. 2016, 34 (7): 94-102. ;  doi: 10.3981/j.issn.1000-7857.2016.07.008
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Abstract ( 835 )
5 oil sunflower hybrids, P6, P29, P65, S13 and P50, are used to study the plant morphologies of the soil culture at 3 different concentrations of NaCl, 300, 350 and 400 mmol/L, and the plant morphologies of the water culture at 3 different concentrations of NaCl, 100, 120 and 150 mmol/L. The tolerance to the salt stress is identified for the water culture with 9 day's treatment of 120 mmol/L NaCl. Five physiological and biochemical indexes, including the soluble protein content, the Pro content, the MDA content, the SOD activity, and the POD activity about the salt-tolerance of water cultures of P50 and P29 are determined by two treatments of 120 and 150 mmol/L concentrations of NaCl, to investigate the different responses to the salt stress among oil sunflower hybrids. Results show:1) The salt tolerance capacities of five oil sunflower hybrids are in the following order:P50> P65> P6> S13> P29. With respect to the degree of salt tolerance, P50 and P65 are very strong salt-tolerant types, S13 and P6 are moderate salt-tolerant types, P29 is a very weak salt-tolerant type. 2) Five indexes show a very significant difference between P50 and P29. 3) Five indexes show very significant difference by comparing with different concentrations of the same species of P29 and P50. P50 shows a strong resistance to the salt stress.

Analysis of carbonate microfacies in Pliocene-Holocene, in Well XK-1, the Xisha Islang, South China Sea

LI Xiao, LIU Na, WU Shijiu, LIU Cai, XU Shouli, LIU Li, ZHAO Shuang, YU Yaping
Science & Technology Review. 2016, 34 (7): 103-110. ;  doi: 10.3981/j.issn.1000-7857.2016.07.009
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Abstract ( 863 )
Well XK-1, as a fullcoring scientific drilling well, provides an opportunity for comprehensive and systematic study of carbonate. This paper makes a quantitative analysis of carbonate microfacies, through careful observation of core samples and systematic analysis of thin sections, focusing on Pliocene-Holocene component types, microfacies types, and their vertical characteristics. The component of the carbonate has the characteristics of high grain content, as well as low matrix and cement content. The component microfeatures can be seen in 19 different types, mainly including the bioclast packstone, the bioclast wackstone, the coral framestone, and the bryozoa bindstone. The vertical distribution of carbonate microfacies shows that the carbonare experiences an agitated water-alternate deposition in the strongly agitated water and an agitated water-alternate deposition in the agitated water and the weakly agitated water, in Ledong formation; while it experiences the alternate deposition in the strongly agitated water, the agitated water and the weakly water-agitated water in Yingehai formation.

Physical properties and classifications of different reservoirs in difficult recovery oilfields

TIAN Xiao, YANG Zhengming, CHU Shasha, ZHAO Guomei, WEI Chengzhang
Science & Technology Review. 2016, 34 (7): 111-116. ;  doi: 10.3981/j.issn.1000-7857.2016.07.010
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Abstract ( 806 )
In view of the poor physical property and the complicated geological conditions of the difficult recovery reservoir in Qaidam Basin, the physical properties and the micro pore structure characteristics of the reservoir in 3 main blocks are systematically studied by means of the constant-rate mercury injection technique, the nuclear magnetic resonance and the nonlinear seepage experiment. In the comprehensive evaluation of low-permeability reservoirs, we add a new parameter, the brittleness index. Thus, a comprehensive evaluation method for the low-permeability & difficult recovery reservoir is proposed. It is indicated that the difficult recovery reservoir is typically a low porosity and ultra-low permeability reservoir. The differences of the physical properties and the pore-throat characteristic parameters of the reservoir in different blocks are due to the differences of the micro-pore structures of the reservoir. Meanwhile, the exploitation potential of the difficult recovery reservoir of Qaidam Basin is analyzed and evaluated. The classification results are consistent with the actual development and production of the oilfield.

Pressure transient analysis of volume fracturing well in low permeability oil reservoir

LIAO Xinwei, CHEN Xiaoming, ZHAO Xiaoliang, WANG Huan
Science & Technology Review. 2016, 34 (7): 117-122. ;  doi: 10.3981/j.issn.1000-7857.2016.07.011
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Abstract ( 727 )
The development of volume fracturing technique is still in its infancy. A large number of domestic oilfields have attempted ways of hydraulic fracturing, among which Changqing oilfield has made great progress by developing a new technique named segmented multi-cluster fracturing. As the seepage flow mechanism of volume fractured reservoir is still far from perfection, this article tries to propose a basic model for volume fractured vertical wells, which is based on the concept of SRV. Firstly, the seepage flow underground is divided into two processes:seepage flow in reservoir and seepage flow in fracture. Then the seepage in reservoir is studied with Green function and line source function, while the seepage in fracture is assumed as the Darcy flow. Finally, the two processes are coupled at the fracture surface with equivalent pressure and flow rates. The pressure and pressure derivative type curves are obtained by solving flow matrix equations, and the factors related to the type curve are studied. In the end this model is proven to be an efficient model coupling vertical fractured wells, two porosity system and radial composite reservoir, which is a foundation for pressure transient analysis of volume fractured wells.

Tight sandstone gas reservoir properties of Kelasu-structural belt in Kuqa-depression

FAN Junjia, LIU Shaobo, ZHANG Xi, ZHENG Yongping, LIU Ruilan, LI Xiuli
Science & Technology Review. 2016, 34 (7): 123-128. ;  doi: 10.3981/j.issn.1000-7857.2016.07.012
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Abstract ( 718 )
Based on the geological research of Kelasu structural belt in Kuqa depression, we analyze tight sandstone gas reservoir properties of Dabei area by using microscope and laser scanning confocal microscope (LSCM) observation, mercury-injection capillary pressure (MICP) testing, and porosity and permeability testing. The results show the followings. The major pore types in tight sandstone gas reservoirs of Dabei area are slot pores and solution pores; Expulsion pressure of tight sandstone in the study area is generally above 5 MPa, with poor pore sorting and small pore throat radius; When the sandstone reservoir porosity is less than 5%, the correlation between porosity and permeability is weak, with small porosity and high permeability, which may be resulted from the contribution of micro-fractures in tight sandstone. The major rock type in Dabei gas field is feldspar lithic quartz sandstone, and it is dominated by calcite cementation. Besides, tight sandstone reservoir shows obvious fractures reconstruction.

Permeabilities of different rank coals by injecting carbon dioxide

GUO Hui, WANG Yanbin, ZHANG Chongchong, CHEN Ye, TAO Chuanqi
Science & Technology Review. 2016, 34 (7): 129-133. ;  doi: 10.3981/j.issn.1000-7857.2016.07.013
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Abstract ( 703 )
This paper investigates the permeability change caused by reactions with different minerals in coal after injecting carbon dioxide for providing an experimental support for increasing the flow conductivity of the coal reservoir, and also for the improvement of the permeability based on the test of the nitrogen adsorption, the mineral composition and the permeability of medium-high rank coal (Tunlan mine and Sihe mine). The permeability change model is built based on the nonlinear regression analysis of the initial permeability, the reaction time and the improved permeability. The results indicate that the permeability of medium-high rank coal increases first and then decreases with time after injecting the carbon dioxide as a result of CO2-water-rock interaction; The permeability of the Sihe coal samples reaches the maximum value first, followed by the Tunlan coal samples, and the improving effect of permeability of the Sihe coal samples is shown to be better than that of the Tunlan coal samples; For the best improvements, the initial permeability is about 0.2×10-3 to 0.4×10-3 μm2; Finally, the reliability of the mathematical model is verified.

Risk assessment of water environment on basin scale

LIU Xiaohui, WANG Yong, DONG Wenping, GUO Xiaochun, BI Bin, WANG Yufan, WANG Weiliang, LU Shaoyong
Science & Technology Review. 2016, 34 (7): 134-138. ;  doi: 10.3981/j.issn.1000-7857.2016.07.014
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Abstract ( 918 )
In view of the water environment pollution on a basin scale, the risk sources and the influential factors are identificated. It is found that the main factors include the natural environment, the economy and the society, and the main pollution sources are those of nonpoint and point. According to the watershed features, the classification of the risk degrees, and the methods of risk assessment are discussed for the basin water environment from three aspects:The eutrophication, the organic matter and the heavy metals. Basin water environmental risk control strategies are proposed to reduce the pollution risk of the river basin water environment or reduce the pollution damage. It is pointed out that the water pollution control in a basin scale should be strengthened. In addition, a prevention and control system for the basin water environment risk needs to be established.
Focus

The development of emerging satellite internet constellations

LIU Yue, LIAO Chunfa
Science & Technology Review. 2016, 34 (7): 139-148. ;  doi: 10.3981/j.issn.1000-7857.2016.07.015
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Abstract ( 872 )
In 2015, OneWeb and SpaceX were developed as the Emerging Satellite Internet Constellation Projects among others. This paper reviews the development of the satellite internet constellation since the 1990s, and discusses the characteristics of different ones in different periods and the key factors that affect the success of the projects. This paper also makes an analysis of their advantages & risks on the context of the market positioning, the profit model, the satellite manufacturing, the satellite launching and the financing. The past failure lessons are used to evaluate the future new constellations. It is pointed out that the future development of emerging internet constellations will not simply repeat the past patterns. The emerging satellite constellations would have positive influences on the traditional satellite communication industry, the satellite operation, the satellite manufacturing and industry development concepts.
Scientific Community Promotion

Science & Technology Review. 2016, 34 (7): 149-149.
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Abstract ( 469 )
Careers

Science & Technology Review. 2016, 34 (7): 150-150.
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Abstract ( 289 )

Science & Technology Review. 2016, 34 (7): 150-150.
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Abstract ( 224 )
Book Reviews

Science & Technology Review. 2016, 34 (7): 151-151.
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Abstract ( 460 )

Science & Technology Review. 2016, 34 (7): 153-153.
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Abstract ( 74 )

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