Li T.-H.,Schlumberger |
Li T.-H.,China National Petroleum Corporation |
Meng X.-L.,China National Logging Co. |
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.
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.
Wang D.,Bohai University |
Yin Z.-Y.,Bohai University |
Li L.,Bohai University |
Fang B.-H.,Fire Service of Liaohe Oil Field |
Li K.,China National Logging Corporation
Proceedings of the 2012 International Conference on Industrial Control and Electronics Engineering, ICICEE 2012 | Year: 2012
The problems of H∞ robust fault tolerant control are studied for a class of nonlinear Descriptor systems with time-varying delays. The T-S fuzzy model is employed to represent a nonlinear system, for the actuator fault of systems with disturbance, the state feedback controller is designed. The sufficient conditions are obtained based on Lyapunov asymptotic stability theory and linear matrix inequality method, which are dependent on time delays and satisfies the H∞ performance index of the system. The relationship among the terms of the nonlinear system and the relationship among the terms in the Leibniz-Newton formula are expressed by introducing some free weighting matrices. This treatment avoids difficulties and blindness in the handing of the Lyapunov function, and less conservative results are obtained. Simulation results demonstrate the effectiveness of the proposed approach. © 2012 IEEE.
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.
Li C.,Petrochina |
Shi Y.,Petrochina |
Zhou C.,Petrochina |
Li X.,Petrochina |
And 3 more authors.
Petroleum Exploration and Development | Year: 2010
Low amplitude and low resistivity oil reservoirs are developed in the Triassic Chang 2 oil layers in A block of Changqing Oilfield. They are controlled by palaeogeomorphology, have large oil-bearing areas, and may form large-scale low resistivity reservoirs. The petrophysical origin study of the reservoirs reveals that the main reasons for low resistivity are the low oil saturation caused by the gentleness of the structure, and the different influences of fresh drilling mud filtrate invasion on dual induction logging in oil pay and water zones. A step-by-step logging identification and quantitative evaluation method was established. Through the three steps of conventional logging cross-plot, invasion factor analysis based on the invasion principle, and comparison between wells, pay zones can be effectively identified and the ability of logging interpretation is enhanced. A quantitative evaluation of oil reservoirs can be made by the forward modeling of the fresh drilling mud invasion, the inverse interpretation under the constraint conditions of geological and reservoir engineering parameters, and the quantitative evaluation result verification, thus improving the accuracy and reliability of logging identification and quantitative evaluation of low resistivity pay zones in low amplitude reservoirs. © 2010 Research Institute of Petroleum Exploration & Development, PetroChina.
Zhang L.,Northeast Petroleum University |
Shi Y.,China University of Petroleum - East China |
Yan C.,Chengdu University of Technology |
Wu X.,Northeast Petroleum University |
And 2 more authors.
Advanced Materials Research | Year: 2012
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. © (2012) Trans Tech Publications, Switzerland.
Zhu Y.-H.,China University of Petroleum - Beijing |
Zhu Y.-H.,China Petroleum Logging Company Ltd |
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.
Xiong S.-C.,Petrochina |
He Y.,Petrochina |
Tao H.-L.,China National Logging Corporation |
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.
Cai H-.Q.,Anhui Medical University |
Li Q.-L.,Anhui Medical University |
Zhou J.,Anhui Medical University |
Tang J.,Anhui Medical University |
Chen H.,China National Logging Corporation
Journal of Clinical Rehabilitative Tissue Engineering Research | Year: 2010
BACKGROUND: Studies regarding synthesizing composite bone repair materials with organic macromolecules as mineralizers template are the hot research spot. However, reports concerning using agar as bone repair materials are few. OBJECTIVE: To synthesize a novel agar-hydroxyapatite composite material, and to evaluate its physical and chemical properties as well as cytocompatibility. METHODS: (1)A certain amount of the non-nano-hydroxyapatite in hydrochloric acid solution was added into a certain amount of agar sol, and the reaction system was adjusted with PH value of 7-8. And then the precipitate was lyophilized to obtain the composite of agar-hydroxyapatite. (2)The third generation of rat bone marrow stromal cell (BMSC) was co-cultured with agar-hydroxyapatite. And the growth of cells was observed at days 1, 3 and 5 after culture. RESULTS AND CONCLUSION: The results of X-ray diffraction patterns, Fourier transform infrared spectrometer (FTIR), thermal analyzer, transmission electron microscope, and scanning electron microscope showed that agar could manipulate the growth of hydroxyapatite, and hydroxyapatite nanocrystals was equably formed on the agar-fibers with high porosity. The BMSC grew well in the composite and form a clear cytoskeletal at days 3 and 5 after culture. The results reveal that agar-hydroxyapatite composite has good physical and chemical properties and cytocompatibility.
Tan Z.-L.,Geoscience Center |
Fu H.-B.,Geoscience Center |
You J.-J.,Geoscience Center |
Chen L.-Y.,China National Logging Corporation |
Miao K.,GWDC Well Testing Company
Well Testing | Year: 2016
High skin factor of XX-6 DST3 reduced deliverability greatly. According to which is the main factor to influence deliverability of the pollution or degasification skin factor, and through the integrated analysis of well testing and well logging data of XX-6, XX-3 and XX-10, skin factor caused by pollution is the main factor leading to low deliverability of XX-6 but not by degasification based on theory of that the damage factor caused by pollution didn't change during the first shut-in and the second shut-in period of XX-6 DST3. It is suggested to perforate the upper formation of M-II formation and to test M-II and J-0-1 formation together, which would increase deliverability of XX-6 greatly. The study is meaningful to understand skin factor intensively and extend the application area of well testing data. © 2016, The Editorial Department of Well Testing. All right reserved.