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Poly - term study of Neoproterozoic hydrocarbon migration in western Liaoning - northern Hebei

Author: ZhangMin
Tutor: DuYangSong
School: Chinese Geology University (Beijing)
Course: Mineralogy,petrology, Mineral Deposit Geology
Keywords: Western Liaoning - northern Hebei Neoproterozoic Oil and gas inclusions Asphalt oil seepage FTIR microspectroscopy Hydrocarbon migration and accumulation
CLC: P618.13
Type: Master's thesis
Year: 2005
Downloads: 217
Quote: 1
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Abstract

Fluid inclusions in one of the new means of technology as a reservoir geochemistry research has been widely used in the oil and gas migration and accumulation charging time, temperature, and fluid properties, fluid source as well as the oil and gas prospect evaluation. In this paper, fluid inclusions Neoproterozoic western Liaoning - northern Hebei hydrocarbon migration and accumulation phase study, the first of its kind in the country. Its main content is a comprehensive study of the times of the oil and gas inclusions inclusions combination microthermometry and fluid composition of the inclusions, and the combination of reservoir bitumen, oil seepage occurrence, distribution characteristics of hydrocarbon migration and accumulation period times. Liaoxi - northern Hebei region Neoproterozoic is a the North China ancient marine carbonate sedimentary strata, outcrops of asphalt and oil seepage display very extensive. Multiple tectonic movements form a seam hole through the research and field geological survey, the the Neoproterozoic study area there to form the original reservoirs of favorable geological conditions: sedimentary huge volume, part of strata rich in organic matter, and a higher degree of evolution; well developed carbonate reservoir, is conducive to the migration and accumulation of oil and gas; deposition of polycyclic history of the formation of a favorable source, reservoir and cap configuration relationship. The field asphalt oil seepage study area primarily liquid crude oil, heavy oil, and the solid bitumen three production state, which is the most common solid bitumen, followed by liquid crude oil, heavy oil is the most rare. Its major production like: crack distribution, solution porosity distribution, grain (crystal) between the pore size distribution and the distribution of the suture and dispersed like distribution. By comparison shows that the the Tieling Formation horizon Neoproterozoic oil generation conditions in the study area, followed by Wumishan. Times of the luteal phase the abundance degree (GOI), the combination of inclusions (FIA) and bitumen (oil) based on oil and gas parcels seedlings macroscopic and microscopic characteristics of found oil and gas in the the Neoproterozoic study area there are 3 to 4 migration into Tibet process. In different regions, different layers, the times and the scale of its oil and gas activities in the period of the same. Early oil and gas, mostly native, heavier oil quality, lower maturity; larger late hydrocarbon activities, the lighter the oil, the higher maturity of the major oil and gas along the rock cracks or holes migration, its activities more with tectonic movement . Homogenization temperature and salinity of the test results, the hydrocarbon accumulation times roughly divided into three, the understanding of the microscopic observation study. Fourier transform infrared (IR) micro-spectroscopy analysis of the results of the oil and gas inclusions indicate that the study area there are at least two oil and gas filling the role. -CH2-CH3 absorption peaks and their ratio, combined with the corresponding microscopic characteristics of the oil and gas inclusions study found, with higher CH2/CH3 ratio inclusions are non-fluorescent or petroleum inclusions with weak fluorescent display oil type of hydrocarbon source rocks in the low mature - mature stage of the formation of heavy (thick), with the lower the degree of evolution; the the CH2/CH3 ratio of the lower oil and gas inclusions generally have yellow or blue fluorescent hydrocarbon source rocks the product of the peak of the oil (medium - light oil), for the the main Neoproterozoic hydrocarbon accumulation in western Liaoning - northern Hebei.

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