Jiang S.L.,China University of Geosciences |
Jiang S.L.,China HuaDian Engineering Company |
Zeng C.L.,Chongqing Institute of Geology and Mineral Resources |
Wang S.X.,Chongqing Institute of Geology and Mineral Resources |
Li M.,Shandong Shengli Vocational College
Advanced Materials Research | Year: 2014
In order to carry out a more comprehensive discussion on shale gas accumulation conditions of Lower Cambrian Shuijingtuo Formation and Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation, the distribution, source rock conditions and reservoir conditions of these two shales are comprehensively analyzed, these two shales are both have the characteristics of high organic carbon content, high maturity, appropriate thickness and mainly type I kerogen as source rocks, and interbedded with siltstone and/or fine sandstone, rich in quartz and other detrital components, easy to break and form the cracks, micro cracks as reservoirs, these characteristics provide a favorable material basis and reservoir space for shale gas accumulating. On this basis, the effective distribution areas of these two shales are further determined and shale gas resources are preliminary evaluated, eventually come to the results of shale gas resources of Lower Cambrian Shuijingtuo Formation and Upper Ordovician Wufeng Formation-Lower Silurian Longmaxi Formation respectively are 0.409×1012m3 and 0.389×1012m3. © (2014) Trans Tech Publications, Switzerland.
Lei Z.,Shandong Shengli Vocational College |
Lei Z.,Beijing Technology and Business University |
Weng Y.-F.,Beijing Technology and Business University
Proceedings - 2010 International Symposium on Intelligence Information Processing and Trusted Computing, IPTC 2010 | Year: 2010
The optical flow is widely used in detection and dynamic analysis of moving objects, but it has the heavy computational burden, so it has not been able to in the real-time progress needs. Cellular Neural Network is a kind of neural network with outstanding image processing capabilities, and can be utilized in real-time applications. This paper presents an optical flow analysis method based on CNN, and for extract the interested moved object accurately, an approach which can be realized by CNN was given. Simulation results confirm the validity of the approach developed herein. © 2010 IEEE.
Lei J.,Beijing Electronic Science and Technology Institute |
Lei Z.,Shandong Shengli Vocational College
Proceedings - 2011 International Symposium on Intelligence Information Processing and Trusted Computing, IPTC 2011 | Year: 2011
This paper studied the chaotic cipher based on CNNs chaotic equation and its application in the network environment. Firstly, a improve method for CNNs chaotic properties was given, the variables which has better statistic property and more sensitive to the system parameter be get to generate binary sequence for encrypt. And then, for applying chaotic cipher in network environment, the synchronization method based on the state variables transmission mechanism was proposed, this method can solve the synchronization problem of chaotic stream cipher, and the simulation test results confirm the validity. At last, a chaotic cryptosystem key distribution strategy in network environment was designed. © 2011 IEEE.
Zhang L.,Shandong Shengli Vocational College
Advanced Materials Research | Year: 2013
A improve robust watermarking algorithm is proposed for binary images. The primary focus of the proposed algorithm lies in finding more flippable pixels and enhancing the robustness of watermarking. Based on Haar Wavelet Transform, the more flippable pixels was found not only in the neighbourhood but also in the Wavelet Transform domain. The embedding mechanism based on dynamic step size was proposed for enhancing the robustness of watermarking. And the experiment results and analyses demonstrate that proposed algorithm can find more flippable pixels, and is has better in robustness and invisibility. © (2013) Trans Tech Publications, Switzerland.
Huang W.-A.,China University of Petroleum - East China |
Huang W.-A.,University of Western Australia |
Qiu Z.-S.,China University of Petroleum - East China |
Cui M.-L.,Shandong Shengli Vocational College |
And 3 more authors.
Petroleum Science | Year: 2015
In order to overcome serious instability problems in hydratable shale formations, a novel electropositive wellbore stabilizer (EPWS) was prepared by a new approach. It has good colloidal stability, particle size distribution, compatibility, sealing property, and flexible adaptability. A variety of methods including measurements of particle size, Zeta potential, colloidal stability, contact angle, shale stability index, shale dispersion, shale swelling, and plugging experiments were adopted to characterize the EPWS and evaluate its anti-sloughing capacity and flexible adaptability. Results show that the EPWS has advantages over the conventional wellbore stabilizer (ZX-3) in particle size distribution, colloidal stability, inhibition, compatibility, and flexible adaptability. The EPWS with an average particle size of 507 nm and an average Zeta potential of 54 mV could be stable for 147 days and be compatible with salt tolerant or positive charged additives, and it also exhibited preferable anti-sloughing performance to hydratable shales at 77, 100, and 120 °C, and better compatibility with sodium bentonite than ZX-3 and KCl. The EPWS can plug micro-fractures and pores by forming a tight external mud cake and an internal sealing belt to retard pressure transmission and prevent filtrate invasion, enhancing hydrophobicity of shale surfaces by adsorption to inhibit hydration. The EPWS with flexible adaptability to temperature for inhibition and sealing capacity is available for long open-hole sections during drilling. © 2015, The Author(s).
Chen Q.,China University of Petroleum - East China |
Liu Y.,China University of Petroleum - East China |
Liu Y.,Shandong Shengli Vocational College |
Feng J.,China University of Petroleum - East China
Journal of Networks | Year: 2013
A new method is used to quantify the relationships between stress field and primary fracture characters (aperture, density) in low-permeability sandstone reservoirs based on laboratory experiments and mathematical development, through which, quantitative fracture modeling is set up. Using this modeling, we can load it into the stress analysis software (Ansys 10.0) to acquire 3D palaeo stress field and current-stress field after selecting appropriate mechanical parameters and stress loading. © 2013 ACADEMY PUBLISHER.
Yu K.-P.,Shandong Shengli Vocational College
Xiandai Huagong/Modern Chemical Industry | Year: 2012
The stable palladium nanoclusters catalyst templated by PAMAM with different generations, different end groups and different degrees of crosslinking are prepared. The catalytic efficiency is evaluated by the Suzuki reaction. The results show that, the palladium nanoclusters catalysts templated by 4.5GPAMAM-OCH 3 can be separated and reused easily. The yield can reach 96% with high purity under the mild reaction condition. In particular, the cage-like template prepared by coupling 50% end groups of 4.5GPAMAM-OCH 3 with ethyl diamine plays a great role in preventing the palladium nanoclusters from aggregation. The formed catalyst exhibits excellent reusable properties.
He L.-M.,China University of Petroleum - East China |
Yang D.-H.,China University of Petroleum - East China |
Luo X.-M.,China University of Petroleum - East China |
Li D.-Q.,China University of Petroleum - East China |
Yang F.,Shandong Shengli Vocational College
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2011
The insulated high voltage electrode and four types of electrostatic coalescers were designed and made. By using the micro high-speed camera system and image processing technology, the coalescence characteristics of water droplets at AC electric field were studied with water in crude oil emulsion. The effects of electric field intensity, number of electrode layer and electrode spacing on water droplets coalescence were investigated. The results show that the insulated high voltage electrode can effectively prevent electric breakdown. High electric field intensity and long residence time are conductive to water droplets coalescence, but if the electric field intensity is higher than critical one, the water droplets will rupture. If the electric field intensity is high enough to promote droplet coalescence, the number of electrode layer is not important. But the coalescer with multielectrode can enhance the flow rate and more economical. When electrode spacing is small, the power consumption is low but the electric field is badly distorted. If the electric field can effectively promote water droplet coalescence, the electrode spacing can be increased to avoid adverse effect. The power consumption is affected by water content, number of electrode layer, electrode spacing and so on, and the power consumption should be decreased in consideration of the field condition and electrode structure.
Fang S.,Shandong Shengli Vocational College
Oilfield Chemistry | Year: 2015
The corrosion of pipe network in oilfield water injection system was a problem which was difficult to solve effectively in oil production process. The corrosion was caused by many factors, including physical factors, chemical factors and biological factors. In order to reveal the correlation between corrosion factors and corrosion, the physical and chemical properties of sewage effluent of 55 different stations in Shengli oilfield were analyzed. The correlation between physical, chemical and biological factors in sewage and corrosion was analyzed by SPSS program. The results showed that the correlation index between salinity(<20 g/L), dissolved oxygen, suspended solids and corrosion rate was 0.345, 0.440, 0.305, respectively, the probability (P) was 0.039, 0.001, 0.044, showing a significant positive to corrosion. The correlation index between pH value, temperature and corrosion rate was 0.127, 0.185, respectively, the P was 0.356, 0.177, showing a limited correlation to corrosion. The correlation index between oil content and corrosion rate was -0.295, the P was 0.029, showing a significantly negative correlation. The correlation between bacteria and corrosion rate was reduced for antiseptic injection. © 2015, China International Book Trading Corp. (Guoji Shudian). All rights reserved.
Huang W.,China University of Petroleum - East China |
Huang W.,University of Western Australia |
Wang Y.,China University of Petroleum - East China |
Qiu Z.,China University of Petroleum - East China |
And 3 more authors.
Materials Research Innovations | Year: 2015
In the preparation of a hydrophobic bentonite, the clay was first purified and then converted to sodium form with sodium fluoride before being made hydrophobic by intercalation with octadecyl dimethyl phenylmethyl ammonium chloride (ODPAC). Elemental and mineral compositions of the sodium-modified bentonite were determined using X-ray fluorescence spectrometry (XRF) and X-ray diffraction (XRD). The swelling capacity and colloid index were also determined. For the hydrophobic bentonite, the following were characterised microstructure, interlamellar spacing, composition, thermal stability, wettability, surface energy and dispersity using a range of techniques: SEM, XRD, FTIR, thermogravimetric analysis (TGA) and contact angle. The colloid fraction and rheological properties were also determined. Sodium modification caused a certain increase in clay and Na2O contents and decrease in quartz content. The interlamellar spacing was also decreased to 10.03 Å. Hydrophobic bentonite displayed a larger interlamellar spacing of 18.73 Å confirming that intercalation by the surfactant has occurred. The hydrophobic bentonite particles displayed a thick flat layered morphology. It displayed high thermal stability with the organic modifier (ODPAC) decomposition occurring at a temperature higher than 2608C. It is much more hydrophobic and has a smaller surface energy than sodium bentonite. It dispersed easily in white oil 5#, white oil 7# and synthetic base causing an increase in viscosity and yield point as intended. © W. S. Maney & Son Ltd 2015.