庫車坳陷原油中重排藿烷類化合物的組成特征與成因探討
[Abstract]:Rearranged Epimedium is an important component of the biomarker of saturated hydrocarbon, which is widely distributed in source rocks and crude oil in geological bodies. In recent years, the research results of source rock and crude oil of high abundance reader compounds have been reported, but the source and cause are not clear. Therefore, the high content of the geological bodies is discussed. The formation conditions, main controlling factors, genetic mechanism and application in petroleum geology are important for the key problems of oil and gas exploration, such as the fine contrast of oil source in the oil and gas exploration of some superimposed basins, and the accurate determination of the main source rocks is of great significance. This paper is widely investigated in this paper. On the basis of relevant geological data from the domestic and foreign literature and the Kuche depression of the Tarim Basin (DA Wan Qi oilfield and daybei oilfield), 46 crude oil samples were collected systematically. The geochemical characteristics and distribution rules of crude oil were systematically analyzed by chromatography and chromatography-mass spectrometry. A series of comparative studies were carried out. The differences and composition characteristics of crude oil in the biological standard combinations were depicted. The effects of depositional environment, biological sources and maturity on the formation of rearrangement of rearranged plants were discussed. The following main understandings should be obtained: 1, 46 crude oil samples in the Kuche depression of Tarim Basin are mainly light oil and condensate oil. Color from colorless to dark brown. In general, the properties of crude oil have 6 low characteristics: low density, low viscosity, low sulfur content, low wax content, low glial asphaltene and low solidification point. All hydrocarbon chromatographic features are large. The distribution of n-alkanes in some crude oils is complete, with the presence of benzene and methyl cyclohexane, and some of the crude oil samples are affected by the secondary alteration of different degrees.2, and the relative percentage of methyl cyclohexane (MCyC6) is dominant in the C7 light hydrocarbon series of crude oil, and the C27, C28 and C29 of regular steranes are mainly asymmetric "V" type distribution. C29 sterane is dominant; naphthalene series compounds are the main compounds in aromatics, and fluoranthene, benzo, [a] anthracene and pyrene are detected and detected. It shows that the source of organic matter is mainly by land source. The crude oil saturated hydrocarbon Pr/Ph is between 1.2-3.0 and the ratio of gamma paraffane / C30 is 0.18-0.28, indicating the condition of fresh water and brackish water. The study on the maturity parameters of.MPI-1, MPR, F1 and F2 in the weak oxidation and weak reduction environment all indicate that the crude oil in Kuche depression in Tarim Basin is in the mature stage, and the difference of maturity is small. The origin type of the crude oil is divided into two kinds: the first kind of crude oil has the advantage of gamma paraffane, rearrangement sterane, the abundances of rearrangement of the rearrangement of the crude oil, the second kind of crude oil gamma wax The abundance of alkanes is relatively low, rearrangement of sterane, rearrangement of the rearrangement of.3, and the detection of 17a (H) - rearrangement Epimedium series by GC-MS, 18 alpha [(H) - Epimedium series and early eluate rearrangement rearrangement series of three rearrangement anadytine series. The rearrangement of the rearrangement of the rearrangement of the rearrangement of the rearrangement of the /C30 and the C30*/C30H) The relative abundance is divided into three grades: the abnormal high abundance rearrangement Epimedium (27 crude oil samples) at C30*/C30H1.0, the high abundance rearrangement Epimedium type (16 crude oil samples) and the low abundance rearrangement Epimedium (3 crude oil samples) at the time of C30*/C30H=0.2 to 1. The relationship between the rearrangement rearrangement of the crude oil samples shows that the relationship between the rearrangement and the rearrangement of the crude oil samples shows the phase. The correlation of the rearrangement reschedule like compounds with carbon skeleton is relatively good, but the correlation between the rearrangement reschedule compounds with different carbon skeletons is slightly worse than that of the former. It shows that the same series of compounds in the rearrangement reschedule compounds have the same evolutionary path and formation mechanism, and the rearrangement of the rearrangement of the rearrangement of the compound is different. The formation mechanism of the compound may be different.4, the relationship between the rearrangement of the crude oil in the crude oil and the biological standard combination: the distribution of the gamma paraffane ratio (G/C30) in the crude oil samples is between 0.1-0.29, and the mean value is that the relative abundance of the 0.16. rearrangement anadine compounds with Pr/Ph and G/C30H three shows a certain correlation. The sedimentary environment may have a certain influence on the relative abundance of rearranged padeanes. C24 tetracycline /C23 triterpene (C24Te/C23TT) in crude oil is between 0.26-1.79 and 1.28; C24 tetracyclic terpene /C26 triterpenane (C24Te/C26TT) is between 0.67-4.5, and the average value is 2.9. different series of rearrangement and C24. There is a positive correlation between Te/C23TT and C24Te/C26TT, which reflects the possible relationship between the C24 tetracycline and the rearrangement of the rearrangement of the compound. The /C27 regular sterane ratio of the C27 rearrangement sterane in the crude oil is between 0.21-1.8, with a mean of 0.89; the C29 rearrangement sterane /C29 gauge is distributed between 0.18-0.65 and 0.5. There is a good positive correlation between rearrangement and rearrangement of sterane parameters, which reveals that rearrangement sterane may be similar to.5, and the relationship between rearrangement reschedule and aromatics in crude oil: low abundance of PAH and arene (low cyclic aromatic hydrocarbons) in crude oil The relative percentage of the crude oil in the rearrangement of the crude oil is low, between 94.66% and 98.95%, with an average of 96.84%. The relatively high percentage of the crude oil in the crude oil of high abundance and abnormally high abundance of rearranged oil is 98.37%, the 98.55%. four ring and the five ring aromatic hydrocarbons (polycyclic aromatic hydrocarbons) are in high abnormally high abundance rearrangement. The relative content of the crude oil in the crude oil is relatively low, and the content of the crude oil in the low abundance rearrangement oil is relatively high. The rearrangement of the rearrangement compound increases with the increase of the relative content of the low cyclic aromatic hydrocarbons and increases with the decrease of the relative content of polycyclic aromatic hydrocarbons. There are relatively similar forming conditions and parent material sources. The three fluorene Series in crude oil are mainly composed of fluorene (OF), with a relative percentage of 55.17%, and the relative content of sulfur fluorene (SF) is the average of the relative abundance between the rearrangement and OF/ (F+OF) of the 23.97%. crude oil samples. The relationship between the two has a similar sedimentary environment.6, and the relationship between the rearrangement and secondary effects of the rearrangement of the crude oil is mainly the effect of the migration and fractionation on the rearrangement of the rearrangement compound. The abundances of alkyl naphthalene in the naphthalene series in the crude oil are decreased with the abundance of poly alkyl naphthalene, and the abundance of naphthalene or methylnaphthalene is obviously increased; As the relative abundance of do Kifi decreased, the abundance of phenanthrene in methyl phenanthrene and non alkyl side chains increased. Due to the small difference in maturity of crude oil, and the slight degradation of microbes had little effect on the composition of aromatics, this distribution was likely to be related to the migration and fractionation of the original oil. The relative ratio of adamantane compounds with strong degrading ability is used as a parameter to measure the size of crude oil migration and fractionation, and the ratio of different rearranged alanine compounds with 1- methyladamantane / 1- ethyl adamantane (1M-AD/1Et-AD), 1- methyladamantane / 4- methylene dimethyladamantane (1M-AD/4-MDD) has a certain correlation. The relative abundances of the rearrangement of the rearrangement of the compound were affected by.7. Through the comprehensive study, the relative abundance of the rearrangement of the oil in the Kuche depression of the Tarim Basin was mainly controlled by the sedimentary environment and the biological source. In the weak oxidation weak reduction ring, the salinity of the water body was low and the tribute of the high terrestrial plants was given. The migration and fractionation has a certain effect on the relative abundance of the rearrangement of the rearrangement of the rearrangement, but not the main control factor. In addition, the maturity of the crude oil is similar, and the relative abundance of the rearrangement of the rearrangement of the crude oil in the crude oil has no good correlation with the correlation of maturity parameters.
【學(xué)位授予單位】:長江大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:P618.13
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