Abstract: The research of carbonate rock of our university is supported by “Mineral Detailed Survey and Exploration” which is the key subject of Sichuan province, and relies on “Carbonate Rock Laboratory” which is approved to found by the previous Ministry of Petroleum Industry and “the Key Laboratory of Natural Gas Geology” of Sichuan universities. It aimed at carrying out scientific research on important basic theory and problems of application technology in carbonate rock areas in China. After nearly 50 years of construction and development, a series of research directions which were steady, and featured the theory, method, and technology of carbonate rock and natural gas exploration were established. The special report “Enhance the Superority of the Research on Carbonate Rocks, Contribute for Oil and Gas Exploration” introduced the research status in detail to readers from aspects of academic thought, research characteristics, main research directions and advantages, main research contents and achievement.
“Recognition and Correlation of Two Distinct Types of Fan Delta Facies”, by Prof. Chen Jingshan and other authors, studied the steeper slope of basin-margin, eustatic sea level change, depositional hydrodynamic and depositional feature. Two distinct types of marine fan-delta facies in Yacheng Formation, Oligocene, Qiongdongnan Basin are identified, which are near alluvial fan and near mountains fan. It pointed out that it’s in favor of growing fan-delta facies near mountains when there are steeper slope and higher sea level in the basin margin and when there are gentle slope at downthrow block and relatively low sea level, then, it is in favor of growing fan-delta facies near alluvial fan.
“The Hydrocarbon-Expulsion Characters and the Potential Resource Evaluation of the 3rd Member of Shahejie Farmation in Dongying Sub-Depression” was finished by Jiang Fujie and other authors. In this paper, based on the theory of hydrocarbon-expulsion threshold, the hydrocarbon-expulsion characters and the potential source evaluation of the upper, middle, lower sections within the 3rd member of Shahejie Formation are discussed using the hydrocarbon-generated potential method.
At the present, to the research flowing through porous media in most of low permeable reservoirs, the relation between permeability and start-up pressure gradient is dained by core flooding experiment, which is time-consuming and highly cost, and also, the factors taking into consideration are simple. “A New Method and the Application on Calculating Start-up Pressure Gradient in Low Permeable Reservoirs” was written mainly by Xu Jianhong. Through the core flooding experiment, the core samples are from a certain low permeable reservoir in west China and with different permeability, processing and regression analysis of the data are carried on based on the mechanism of fluid flowing through low permeable porous media, a new physical model is set up, and a new method soluting start-up pressure gradient is gained.
With the development of main oil fields in China, the water contained in produced liquid becomes more and its quality more complex. Since most of the produced sewage should be injected back to formation after being treated, oil waste water treatment urgent need solve. “Application of High Temperature Hydrocarbon Degradation Bacteria on Biochemical Treatment to Produced Oily Water” was finished mainly by Liu Junqiang. In order to improve the biochemical treating effect of oilfield produced water, three bacteria strains are isolated from produced fluids in Shengli oilfield to carry on biochemical treatment test under indoor locale simulation station. The result shows that the mixed bacteria improved the feasibility of oil water treatment to some extent, which provided theoretical basis to oilfield sewage treatment.
The thesis “Dynamic Characteristics of the Compound Rock Breaking System of Single Tooth-Enclose”, mainly by Yang Chunlei, with finite element analysis software, established the single bit tooth-row compound movement rock-breaking system model. In the paper, the single bit tooth-row compound movement rock-breaking system is simulated using simulated rock, which is of important meaning in appraising the rock breaking efficiency of different drill styles.
Many factors can influence stability of well wall in the area of petroleum drilling engineering. “Influence of Rock Fractures on Mechanical Stability of Well-Wall”, by Qin Qirong, using 3-D infinite element numeric analysis technology, simulates the influence of fractures on the stability of petroleum well wall, concluding influence degrees of stability of well wall correspondingly with the types, attitudes, densities, combination patterns and embedding depth of the fractures, which has the innovation.
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