Based on the geology and geochemistry of gold-bearing quartz veins in the Jiudian gold deposit of Pingdu, Shandong Province, the geological and geochemical indicators of occurrence of deep-seated ore bodies in the Jiudian gold deposit have been summarized. Extent occurence of wide, intensive, varied alteration zones around the gold-bearing quartz veins and continual presence of diorite porphyrite and lamprophyry indicate the probable occurrence of deep-seated ore bodies at depth of gold lodes. As, Sb and Hg belong to the head halo elements, and their anomalies could reveal the probable occurrence of the deep-seated ore bodies below.

In low permeability porous media which permeability anisotropy is ubiquitous, the percolation of fluid no longer follows linear Darcy's Law. Oil-water two phase flow euqation of low permeability reservoir with permeability anisotropy is established based on generalized Darcy's law and starting pressure gradient, corresponding finite element program is developed and simulated based on the Finite Element Program Generator system (FEPG). The results show that energy-gathering exists in the flow event of flowing area front in low permeability reservoir. In the process of energy-gathering, the flow velocity changed little but increased rapidly as soon as the pressure gradient exceeded the starting pressure gradient of the reservoir, then gradually stabilizeed. The greater the starting pressure gradient is, the greater the near wellbore pressure drop is, the smaller the water flood swept area is. There will be more difficulties in water injection to the same extent.

Varying degree of velocity anomalies has been appeared in Shijiutuo uplift in Bohai Sea, which are mainly demonstrated in the inconsistent between seismic interpretation and the actual drilling depth. In this paper, QHD33-1S area is taken as the example. First of all, the main reason that causes the velocity anomaly phenomena is the effect of sand-formation ratio by forward model analysis, and then technical approaches to improve the accuracy of the velocity field and the degree of understanding of anomalies are further explored, resulting in more precise determination of horizontal variation trend of the velocity in QHD33-1S area. Consequences of actual applications indicate that through the accurate analysis of the velocity anomaly, we can not only realize the fine description of low-amplitude structure, but also the effective prediction of the hydrocarbon-bearing properties of the reservoir. Meanwhile, the results also have certain significance to the other low-amplitude structures in Bohai Sea.

According to the working environment of the polar glacier core drilling, a separatory funnel capillary viscometer which can be used for testing the viscosity of liquids under ultra-low temperature conditions was designed. This viscometer has a simple structure and it is easy to operate, which can meet the testing requirements of different temperature conditions. The viscosity of the dimethyl silicone oil KF-96L-2.0cs was measured under different temperatures using this designed viscometer, and it is found that the viscometer coefficient K changes linearly with temperature. This testing method has relatively high test accuracy and its relative error is less than 4%, which can be used to test the viscosity of the different liquids in ultra-low temperature conditions.

This study presents the use of the method of wavelet transform modulus maxima (WTMM) to detect boundaries of potential field sources. The boundaries of causative sources can be judged by calculating the local modulus maxima of wavelet coefficients at different scales. For the potential field data with noise, the detected boundaries at small scales are easy to be distorted by noise, however, at large scales, the noise can be suppressed greatly and presents more accurate boundary detection results. Therefore, we can get a better boundary judgment by considering the detected boundaries at all scales. Applying the WTMM method to synthetic models and a real data set of Meishan iron deposit, both get a good effect.

Based on the method of probability and statistics, the authors analyzed the physical and mechanical properties of loess in specified area, and discussed its main indexes, the coefficient of variation, and the correlation among the physical and mechanical indexes. Regression equations are built among those indexes, the results show that the variability of mechanical indexes is higher than that of the physical indexes. The conclusions of this study would contribute to further research about loess in western Liaoning.

Taking Zhuyu reservoir in Shannan of Tibet as the test site, the authors collected soil samples for laboratory analysis, and devised infiltration-clogging equipment for laboratory test to research the effect of clogging process on permeability of loose dam foundation of plateau reservoir. Through laboratory test, the soil can cause clogging effect by itself, and the effect of clogging is relative to the water pressure. The clogging effect can be caused obviously by adding fine particles, and the clogging effect of the particles with 0.063-0.25 mm diameter is best, which verifies the rationality of the optimal diameter interval. It provides the realistic significance for the anti-seepage of the plateau reservoir dam foundation.

The subways or underground construction have been built nationwide in 25 cities. The pre-assessment and systematic planning are requested for building a new metro lines. The reason is the inevitability that new construction projects have to face the various difficulties and geological environment risks in accordance with their diverse urban geological environment under underground space development and construction. Taking the Kunming City planning as an example, the sudy assesses the suitability and analyzes its high risk factors on urban underground space development and utilization, using the extenics research methods under complex geological conditions. It would provide a reference to underground space development in the similar urban geological conditions.

Collecting 44 oil-sand specimens of Pu-I Member in two inspection wells before and after polymer flooding in the thirteenth district of Xingshugang oilfield, with experimental analysis, the author obtained the data about oil viscosity, flow, oil saturation, and oil displacement efficiency. The result shows viscous oil predominates in the main remaining oil in Xingshugang oilfield after water flooding with a certain amount of low viscosity oil, high viscosity oil and heavy oil; after polymer flooding, the viscous oil is main ingredient. Compared with water flooding, the low mobility and poor oil can be spread by polymer flooding, expanding the affected area and improving sweep efficiency and oil recovery. The geochemical affecting factors of water flooding and oil displacement efficiency refer to reservoir flow, permeability and the viscosity of residual oil. In the reservoir with permeability from low to high, the polymer flooding efficiency is better than water flooding. It provides the basis for improving the water and polymer flooding efficiency is better than water flooding. It provides the basis for improving the water and polymer flooding efficiency of the Xingshugang oilfield.