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Huang Hao ¹, Dai Tagen ¹

Affiliations
1 School of Geology and lnfo-Physics, Central South University, Hunan Province, CN

Abstract

Based on the theory of petroleum geology, the author systematically analyzed the oil and gas accumulation conditions of Liaodongdong exploration area of Shengli oilfield. Application of effective hydrocarbon source rock analysis, reservoir prediction and evaluation, basin analysis, basin simulation technology and method of hydrocarbon accumulation model is established. The research results show that Liaodongdong exploration area develops many sets of source rocks which buried depth below 2500 m. Hydrocarbon source rocks with high abundance of organic matter and excellent conditions for mineralization. This area develops Guanxia group and Dongying group of two sets of effective reservoir-cap combination, and develops variety of drainage system and various trap types. Different structural belt have different drainage system and trap types, formation of multiple trap types. Liaodongdong exploration area of Shengli oilfield mainly formed four types of reservoirs, which include lithologic-structural reservoir, stratigraphic overlap reservoir, stratigraphic erosion unconformity reservoirs, lithologic reservoirs.

Keywords

Eastern Liaodong Exploration Region of Shengli Oilfield, Hydrocarbon Source Rocks, Trap Types, Carrier Systems, Types of Patterns of Reservoirs.

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Qiu Luo ¹, Dai Tagen ¹, Yang Wu ¹

Affiliations
1 School of Geosciences and Info-Physics, Central South University, Hunan Changsha, CN

Abstract

Soil samples were collected from commercial, residential, agricultural and industrial zones in Zhuzhou city, Hunan Province. The concentrations of heavy metals in soils were determined using plasma emission spectrometer and double channel atomic fluorescence spectrometer. And the distribution characteristics of heavy metals in soils were studied in different functional zones. Based on the soil background values, the soil environmental quality and ecological risk were assessed using the single factor index evaluation method, pollution comprehensive index method and inside plum index evaluation method. The results show that the concentrations of heavy metals in soils of Zhuzhou increased with time, which was consistent with the characteristics of industrial and agricultural production in Zhuzhou. It was obvious that the concentrations of heavy metals differed in different functional zones. The concentration of industrial zone was the highest, while agricultural zone was the lowest. Industrial zone was polluted seriously, where As, Cd, Cu, Hg, Zn all exceed the National Soil Environmental Quality Standard. Commercial and residential zones were polluted moderately, where Cd also exceed standard. In the same place of Zhuzhou, the concentration of heavy metals in the upper soil is higher than that in the subsoil. It can be concluded that human activities, especially industrial production are the main reasons for the enrichment of heavy metal elements, thus should strengthen scientific control and governance.

Keywords

Soil Heavy Metals, Pollution, Distribution Characteristic, Different Functional Zones, Zhuzhou.

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Yang Wu ¹, Dai Tagen ¹, Zhang Menglong ¹

Affiliations
1 School of Geosciences and Info-Physics, Central South University, Hunan Changsha, CN

Abstract

Based on the detailed field work, geochronology, geochemistry and oxygen fugacity characteristics, accompanied with tracing the regional faults and their framework, this article makes an attempt to identify and reveal the evolution trend, material source and geological background of igneous rocks; analyze magmatic oxygen fugacity characteristics of the Yanshanian igneous rocks;discusses the characteristics of magma oxygen fugacity. This paper provides evidence for ascertaining the genetic relationship between magmatic rocks and tectonic setting of the study area; The content of trace elements in zircon showed that igneous rocks formed early generally have higher Ce⁴⁺/Ce³⁺ value, high oxygen fugacity; whereas igneous rocks formed later generally have lower Ce⁴⁺/Ce³⁺ value, indicating the magma with low oxygen fugacity.

Keywords

Oxygen Fugacity, Tectonic Evolution, Xintianling.

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