Advanced Materials Research Vols. 1010-1012

Abstract: Differing from the current inversion methods, the frequency-divided inversion is depend on well logging and seismic data, using the methods of support vector computer to study the amplitude response in different detective frequencies (amplitude versus frequency, simply called AVF), taking AVF as independent information of inversion and creating the non-linear mapping relationship between wave impedance curves of logging data and seismic waveform, fully using the information of low, medium and high frequencies in seismic data to reduce the inversion uncertainty and get a higher resolution result. Frequency-divided inversion is also a high resolution seismic inversion method which no needs wavelet extraction and prior model.

Abstract: Now, water testing in horizontal well is still a worldwide problem, has not yet been mature and reliable technology is widely used in oil fields. Liaohe oilfield test center after three years of scientific research, has made some progress, developed a set of suitable technology for water testing in Liaohe oilfield horizontal wells, and to apply this technology to the water testing in oil wells, a good test results have been achieved.

Abstract: The continuous promotion and application of new drilling technology greatly improves the speed of drilling, protects the reservoir from pollution, but bring challenges to the logging explaining of oil and gas layers evaluations. The debris samples are very small, have poor representation, carry oil and gas information which has been wiped out by the drilling fluid.To find the abnomal oil and gas through the debris makes incredibly difficult. The study improves the divided measures of the gas thickness,which use the "3H method" to identify oil and gas show, improve the identification level of gas measurement data and oil and gas show.

Abstract: In recent years, the proven reserves of lithological reservoirs account for a little more than two-thirds of the total proven reserves in SL Oilfield. The seismic predication technique as the key exploration method of lithological reservoirs focuses on identifying and describing reservoirs, especially on sand bodies. For the lacustrine faulted basin with various complex lithological reservoirs, based on the different geological characteristics of the reservoirs, a series of techniques suitable for channel sand, sandy conglomerate, turbidite and beach bar reservoirs have been developed and applied in the lithological reservoir identification and description and have made great progress in the actual exploration.PrefaceSince 1990s, the exploration in SL Oilfield has already developed to that of subtle reservoirs. The proven reserves of lithological reservoirs account for nearly 70% of the total reserves. The seismic predication technique as the key exploration method of lithological reservoirs focuses on identifying and describing reservoirs, especially on sand bodies. For lithological reservoir exploration in complex geologic conditions, lots of studies have been completed in order to obtain great success in many areas [1-7]. With the increasing degree of exploration, lithological reservoirs will become the key role in the future. It is very important to apply geophysical data for identification and description of lithological reservoirs. It has significant effect to improve exploration benefit and the production.

Abstract: The permeability of tight oil reservoir is very low and general perm-plug method always has a big difference. The results can’t reach the test accuracy requirements. This paper measured 26 block rocks of Changqing tight oil reservoir and several typical tight oil reservoirs in CNPC with pulse decay new method. The result shows that the pulse decay permeability measured in the new method and steady-state Klinkenberg-corrected permeability have a good relationship. We drew a figure about the porosity and steady-state Klinkenberg-corrected permeability of these tight oil reservoirs. This research offers a technical support to the tight oil reservoirs about basic data permeability measurement.

Abstract: The underground situation of Haita oil field is complicated, the chasm develop better, prone appear card and collapsed situation in drilling process. Formation dip larger and prone appear well deviation in drilling process, repeatedly corrected well deviation cause the quality of well bore worse, leading to a large segment of "pregnant", "the candied fruit" well hole. Well diameter irregular and well bore quality assurance is not easy, bring difficulty on ensure cementing project quality. Statistics substandard quality cementing wells during drilling, the average single well corrected well deviation up to 3 times. The oil well cement fluid loss reducer of our country experiencing imitation, self-study and self-improvement process. Especially since the 1990s, the research and application of domestic oil well cement fluid loss reducer rendered vitality, a series of fluid loss reducer products gradually replace foreign products.

Abstract: The purpose of this study to establish the optimum ultrasound-assisted extraction (UAE) parameters of Polysaccharides from Agaricus bisporus mycelia (PABM). Single factor experiment was employed to determine the preliminary range of the extraction parameters including liquid-solid ratio, ultrasonic time, extraction temperature, and ultrasonic power. Then, an orthogonal experiment design was employed to determine the best extraction parameters of PABM. the results showed that the optimal UAE parameters of PABM was liquid-solid ratio of 40 ml/g, ultrasonic time of 70 min, extraction temperature of 55°C, and ultrasonic power of 660 W.

Abstract: The aim of this work was to find out an alternative drying process for semi-dry fermented sausages. Fermented sausages were subjected to hot air drying (HA) and microwave vacuum drying (MWV), respectively. The HA was carried out at 70 °C for 60 min. For MWV, three temperatures i.e. 30 °C, 40 °C and 50 °C were applied with pressure controlled at 80 kPa and microwave intensity at 6 kW for 2 min. After drying, the dehydration rates were determined immediately. The products were stored at room temperature until the end of experiment. The pH value, 2-thiobarbituric acid (TBA) and total volatile basic nitrogen (TVB-N) contents were measured at 0, 7, 14 and 28 days, respectively. In addition, the sensory properties were evaluated at 28 d. The results showed that compared to the HA, MWV could postpone the rise of pH value, TBA and TVB-N contents during the storage. Moreover, the sensory properties of MWV were better than that of HA, indicating that MWV would be a greatly promising drying process for semi-fry fermented sausages.

Abstract: These sausages were manufactured with mutton and tail fat by starter culture. The microbiological of fermented mutton sausages were evaluated to determine their quality characteristics during ripening and storage. Two groups of fermented sausages manufacture using the same technology were named control group (CO) and starter culture group (SC). In this study, Lactic acid bacteria counts in sausages made with combinations of starter cultures increased to 8 logcfu/g. The total bacteria counts in the SC were lower (P < 0.05) than in the control (CO) after drying and storage time. During ripening, total bacterial counts in the SC were 7logcfu/g, which was significantly lower (p<0.05) than in the CO. The Micrococci-staphylococci counts of the SC were 6 logcfu/g and significantly lower (P < 0.05) than of the CO during ripening.

Abstract: Freeze-dried gelatinization glutinous rice starch (FGGRS) was prepared, characterized and evaluated. The functional properties of native starch and FGGRS were studied, respectively. Scanning electron microscopy (SEM) suggested the structure of FGGRS is looser and more porous, and the surface is rough and scaly. Due to the rapidly cooling process, the movement of starch chains was curded and X-ray diffraction (XRD) showed the peak strength of FGGRS is lower than the original, presented as a diffuse state and indicated that it is a V-type structure. Its particle was determined by mastersizer 2000 particle size analyzer and resulted in particles with a mean size of 11.33μm. Rheological tests confirmed FGGRS is pseudoplastic fluids and demonstrated that it belonged to shear thinning system. FGGRS presented a lower apparent viscosity and performed better freeze-thaw stability. The light transmittance of FGGRS was 27.67%, and presented a better transparency. In addition, due to its formation of new crystal types and its loose microstructure after lyophilization the cold water solubility of FGGRS is excellent.