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Li L.,China University of Petroleum - Beijing | Li H.-Q.,China University of Petroleum - Beijing | Xie S.-L.,China National Logging Corporation
Jisuanji Jicheng Zhizao Xitong/Computer Integrated Manufacturing Systems, CIMS | Year: 2012

To realize process mining and to overcome the disadvantages that Standard Particle Swarm Optimization (SPSO) was easily getting into pre-maturity and local optimum, mutation operation based particle swarm process mining was proposed. In evolutionary process of SPSO, all particles followed the optimal particle to search, which led population diversity to appear premature convergence after decreased rapidly. Under genetic algorithm inspiration, the algorithm was flung off restraint of falling in local extreme point by carrying out mutation operation for particle in population. Thus algorithm's ability to extricate escape from the local optimum was improved. Experimental results showed that the proposed method got good effect in accuracy and speed of solution. Source

Zhu Y.-H.,China University of Petroleum - Beijing | Zhu Y.-H.,China Petroleum Logging Co. | Tao G.,China University of Petroleum - Beijing | Fang W.,China National Logging Corporation
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2010

The dynamic behavior of oil-water surface that leads to the oil-water two-phase separation phenomenon in rock physics experiments was numerically simulated by using potential model of two-phase immiscible fluids in lattice Boltzmann (LB) method. The microscopic feature of two-phase flow in porous medium was analyzed, and the interfacial tension factor Gf of two-phase immiscible fluid was theoretically determined. The oil-water two-phase separation caused by interfacial tension was simulated successfully. Based on this, the influence of wettability on two-phase separation of pore fluid in real cores of reservoir rock was investigated, and global dynamic visualizations were realized. LB method is simple and visual in image to take oil-water two-phase segregation in reservoir rocks. It is an important evaluation method to research the behavior and character of fluid separation. Source

Xiong S.-C.,Petrochina | He Y.,Petrochina | Tao H.-L.,China National Logging Corporation | Liu W.-D.,Petrochina
Oilfield Chemistry | Year: 2011

The alkaline solution transmission equation in the porous media of stratum mineral was built which applied dissolution speed constant and multi order reaction co-efficiency to the one-dimensional fluid equation and two-dimensional fluid equation. The concentration distribution of alkaline solution was calculated. The results showed that numerical value and physical value were similar and their regularity fit well. This calculating method could be used for analyzing the alkaline transmission mechanism and simulating displacement process. The influential factors of alkaline concentration regularity were studied, such as adsorption, diffusion, injection volume and dissolution, and so on. This model could be used for predicting alkali consumption, optimizing alkali solution concentration and suitable injection, and improving the oil recovery. Source

Li T.-H.,Schlumberger | Li T.-H.,China National Petroleum Corporation | Meng X.-L.,China National Logging Corporation | Ma J.-H.,China National Petroleum Corporation | And 2 more authors.
Xinan Shiyou Daxue Xuebao/Journal of Southwest Petroleum University | Year: 2010

Tainan gas field is located at the central sag area of Qaidam Basin, Qinghai province, the field is very high in salinity, which results in very low reservoir resistivity, the reservoir rocks are dominated by thinly interbeded sandstone and mudstone. Because of the limitation of vertical resolution, conventional well logging curve can not really demonstrate the interbeded formation characteristics, which makes hydrocarbon recognition more difficult. The existing method improving vertical resolution of well logging curve is more placed on theory and geological data is lacking, the operability is poor. Sharplite thin bed processing method is presented by Schlumberger aiming at the situation mentioned above, high resolution well logging curve is obtained by integrating high resolution FMI images and conventional well logging curve to carry out reverse processing. The application in Tainan gas field shows the sharplite thin bed processing method can greatly improve the vertical resolution of conventional curves so as to effectively identify hydrocarbon in thin beds. Source

Dong W.,Bohai University | Cheng C.Q.,Bohai University | Kai L.,China National Logging Corporation | Fang B.-H.,Fire Service of Liaohe Oil Field
2011 International Conference on Electronics, Communications and Control, ICECC 2011 - Proceedings | Year: 2011

Aimed at the serious phenomenon of drunk driving in modern society, a MCU electronic circuit board is used in the system. With alcohol sensor MQ303A, the alcohol concentration is detected. Through ADC0809, the detection signal is converted to digital signal, which is handled directly by MCU. According to the digital signal, the car is controlled automatically, can't be driving after driver drinking, thus avoid the occurrence of drunk driving. © 2011 IEEE. Source

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