Advanced Materials Research Vols. 734-737

Abstract: In this article,based on the terrestrial heat flow data, the terrestrial heat flow map in the area, geothermal gradient map and different depth geothermal contour map of study area within the Territory of China, I explored respectively the relationship between geothermal field and tectonic, geologic structures by analyzing respectively the corresponding relationships between the structural diagram and terrestrial heat flow diagram, temperature contour map, geothermal gradient map in study area. The main conclusions are as follows. Geothermal field has been restricted by the India plate and Eurasian plate collision. So the study area as a whole is a geothermal abnormal area. Features of regional geological structure control the geothermal flow distribution. Geothermal abrupt changing occurs between different tectonic units.

Abstract: Putaohua reservoir is the principal producing formation in Daqing oilfield Xingbei block. The spatial distribution of single sand body is particularly important for the residual oil tapping in the middle-late stage of oilfield development. The paper studied sedimentary microfacies of Putaohua reservoirs in the zone, established high-resolution sequence stratigraphic framework of the area and a typical single sand body logging phase mode on the basis of logging features, finely portrayed single sand body type and spatial distribution on this basis to lay the solid geological foundation for oilfield subsequent residual oil tapping and provide a scientific geology guide.

Abstract: Sequence stratigraphic features of the Jurassic succession in Central Junggar Basin were investigated by integrating multiple materials including cores, well and seismic data. Due to their unique formation mechanism, sequences of the target interval were analyzed with a binary systems tract mode (each complete sequence contains a transgressive systems tract and a highstand systems tract) rather than the traditional one. Basic principles and analytical methods of high-resolution sequence stratigraphy were also applied to this research. By adopting cyclic correlation and hierarchical control techniques, eight sequences (Sq1-Sq8) were identified in the target interval. Especially, coal seams are of great significance in the sequence identification and they were considered to be closely relevant to maximum flooding surfaces (mfs).

Abstract: Geza island arc located in the southwest Sanjiang tectonic igneous rock belts, it was a products of Ganzi-Litang oceanic crust diving to Zhongdian Landmasses in late Triassic and a important of newly discovered copper polymetallic belts in the recent years in China. The regional strong tectonic-magmatic activity throughout the island-arc orogenesis from beginning to the end, the rich mineralization developed in the different times and different circumstances. Based on the development stage of island arc orogenic,the distribution of intrusive rocks, rocks composition, geochemical characteristics, Geza island arc granit belt can be divided into three belts. Lithogeochemical characteristics show that the porphyry (porphyrite) and island-arc granite rocks have the same rock series (high-K calc-alkaline) and the same genetic type (I-type granite); these rocks trace elements very similar to granite of island arc, which enriched in Ba, La, Hf, Au,chalcophile elements Cu,Pb, siderophile elements Mo, Ni, and depleted in Rb, Nb, P, Ti.

Abstract: The eastern part of Heilongjiang province is an important energy base in northeast China, with more than fifty small and medium sized coal basins. The article analyzed the relationship between the basins characteristics and the coal-bearing series deposits in this area. In the early Cretaceous, all the eastern Heilongjiang province area was a large continental margin basin, with the main provenance area located in its west. This makes the coal accumulating effect at that time occurs mainly in the west of the near provenance areas, forming the main coal seam in this province. The second major coal accumulating, mainly in rift basins, happened in Paleocene. In late Cretaceous and Paleocene, the former coal accumulating basin was transformed and damaged because of tectonic forces, so that the current coal-bearing series distribution is characterized by isolated small and medium sized coal basins.

Abstract: The adaptive deconvolution processing is a kind of processing method for different background conditions. The reservoir of FuYang group in Yushulin oil field has the typical uneven feature with low porosity and low permeability. After the oil reservoir flooded by ejecting water, the zones without water and the zones with water interlaced with each other, that makes the induction logging curves with lower longitudinal resolution hardly reflect actual water-flooding condition. This paper takes adaptive deconvolution processing method selecting background conductivities according to the measurement points’ conductivities, which improve the resolution of induction logging data significantly. The processing value of resistivity is similar with the true formation resistivity.This method is better on identifying the water flooded condition of the oil reservoir.

Abstract: The seismic data interpretation shows that faults in Pubei Oilfield developed in the form of the lower, middle and upper fault systems, vertically corresponding to the tectonic evolution stages of Songliao Basin which are rifting, depression and inversion stages; in the plane the faults in Pubei Oilfield appear dense characteristics to be belts, especially in Fuyang oil layer, but not clear and sparse in Putaohua oil layer; faults dense belts in Fuyang oil layer from five orientations combine alternately, cutting Fuyang oil layer into the grid feature, but the faults distribution of Putaohua oil layer is related with the fault blocks division of the Pubei Oilfield. Generally, 8 fault belts separate the Pubei Oilfield into seven fault blocks.

Abstract: Clay minerals are widely distributed in the middle 3rd member of Shahejie Formation (Es₃) in Dongying Depression. Based on the types, contents and combination features of clay minerals, this paper studies the transverse distribution regularities of clay minerals in this strata. Through the study, it can be found that the main types of clay minerals include kaolinites, illites, chlorites, illites/smectites. By adopting the single factor analysis method, the planar distribution of the main clay minerals is studied and the main controlling factors for the distribution of clay minerals are comprehensively analyzed. The research shows that different types of parent rocks determine the original components of clay minerals, warm and humid climate influences the weathering of clay minerals, sedimentary environment provides the condition for deposition and preservation, and diagenesis changes the components of parts of clay minerals.

Abstract: Gas hydrate is a solid ice-like compound and is stable at low temperature and high pressure conditions found beneath permafrost and in marine sediments on continental margins offshore. In the marine environment, the bottom-simulating reflector (BSR) in seismic reflection profiles is interpreted to indicate the base of the gas hydrate stability zone (GHSZ).In many locations two or more sub-parallel BSRs have been reported. We not only compared the BSRs characteristics from reported areas but also discussed the mechanism of GHSZ shifts by climate change, sedimentation process and tectonic movement. We also considered the mix gases composition hydrate stability in certain marine environment and gave a simple model for the BSR differences on water depth.

Abstract: The provenance tectonic background of Late Jurassic Mohe Basin was researched through the geochemical composition of sandstone. The Late Jurassic Mohe Basin is characterized by multiple provenances. One provenance is the active continental margin, and another is the island arc. Comparing with the regional lithology, the active continental margin may be from the Mongolia-Okhotsk orogenic belt, and the island arc may be from the northern of the Da Hingan Mountains. The characteristics are concerned with its geotectonic position.