石油实验地质

1985, 7(1): 1-2. doi: 10.11781/sysydz198501001

Abstract(397) PDF-CN(289)

Abstract:

COMMENT ON SEVERAL TOPICS IN THE GEOCHEMISTRY CARBONATE SOURCE ROCK

Chen Peiji

1985, 7(1): 3-12. doi: 10.11781/sysydz198501003

Abstract(525) PDF-CN(450)

Abstract:
Based on the data from home and aboard, several important aspects in organic geochemistry of carbonate source rock, such as the abundance and eovlution of organic matter and the time of oil generation are discussed comprehensively. Meantime, the author put forward her view point on these topics.

STUDIES OF AROMATIC SERIES COMPOUNDS IN SOURCE ROCKS

Cheng Zhongdi, Jiang Naihuang

1985, 7(1): 13-19. doi: 10.11781/sysydz198501013

Abstract(443) PDF-CN(244)

Abstract:
In this paper,the components of aromatic HC in source rocks are analyzed by GC-MS. According to the general fromula C_nH_2n-p(P: 6, 8, 1,0……20),11 Series of aromatic HC are identified and more than 200 mass peaks are calculated. The component and the total carbon number distribution of aromatic series compounds in source rocks with various source type and maturity are listed to provdied data for further understanding of the thermal evolution of source rocks.

A METHOD FOR ANALYSING MICRO-LIGHT HYDROCARBON (C₂-C₉) IN ROCKS

Wu Jie, Zhang Yijia

1985, 7(1): 20-24. doi: 10.11781/sysydz198501020

Abstract(451) PDF-CN(324)

Abstract:
This method is a Modification of the hydrogen extraction method of Schaefer et al.and referring to the theory of the phase balance of volatile component in solids and the discrete gas extraction suggested by Kolb. This method can be used to determine C₂-C₉ hydrocarbons in the sedimentary rocks, limestone etc. The limit of detection is I ppb. The error in determination of the total amount (C₂-C₉) is 20%.

SEPERATING BRANCHED NAPHTHENES AND N-ALKANE BY PAPER CHROMATOGRAPHY OF UREA COMPLEXATION

Fan Shanfa, Shi Jiyang, Hong Ziqing, Lü Guoying

1985, 7(1): 25-28. doi: 10.11781/sysydz198501025

Abstract(530) PDF-CN(335)

Abstract:
Paper chromatography of urea complexation is used to seperate chained-naphtene and n-alkane, which improved the method of 5 Amolecular sieve adsorption and simplified the complicated process of urea complexation. Based on the principle of urea complexing n-alkane, saturated solution of urea formaldehyde is directly spreaded on chromatographic paper with quick spatting. As a result, alkane and urea in the sample are complexed rapidly. Then n-alkane is seperated from alkyl component by drying and developing. Through experiments, it is proved that the method is easy in practice, and very effective.

CHANGE OF PORE VOLUME IN DOLOMITIZATION

Chen Yanhue, Liu Ying, Sun Tuo

1985, 7(1): 29-37. doi: 10.11781/sysydz198501029

Abstract(508) PDF-CN(355)

Abstract:
The changes of pore volume in dolomitization is essential to the reservoir properties. Recently, there are three kind of views in recongnizing the change: 1.There is an increase of pore volume during dolomitization; 2.There is a decrease of pore volume during dolomitization; 3.There is no volume change during dolomitization. The author suggests that dolomitization is nearly a volume for volume replacement. There is little effect on pore volume in simple dolomitization. The author presents 2 models of the formation of "Sucrosic" dolostoen which preserved good reservoir properties. (1) Replacement-soution model, and (2) Replacement-conversion model. The formetion of "Sucrosic" Dolostone is not an inevitable result of dolomitization but a product of specific dolomitization environment and certain textural condition.

THE PALEOGEOGRAPHIC CHANGES OF LATE PALEOZOIC IN QILIANSHAN REGION

Jin Songqiao, Zhu Weiyuan, Zuo Guochao

1985, 7(1): 38-46. doi: 10.11781/sysydz198501038

Abstract(451) PDF-CN(368)

Abstract:
The 506 pieces of section of Upper Paleozoic have been collected by the author to compile six lithofacies paleogeographic maps which can be summarized as follows: 1.After Qilian movement, ancient Qilian trench transformed into continent, and six deep N60° intermontane basins, trending parallel, with very thick sediments were formed. At the end of Late Devonian, elevation gradually appeared in the northern Qilian basin, while southern Qilian that had been paleoplain, became an intermontane basin. 2.In Early Carboniferous, the three southern Qilian intermontane basins were linked up by marine transgression, with Late Carboniferous further extended. Ancient Qilianshan was a wide and shallow epi-continental sea, which was connected with North China. The sediments,paleontologic groups and ore-bearing in the areas are very similar. 3. In Early Permian, the sea water receded southward, and the epicontinental sea of Northern Qilian became intermontane basin, the deposits are similar to that of North China. In Late Permian, Northern Qilian basin uplifted in the east, while southern sea area contracted and became asea bay. This is possibly caused by the controlling of Qi, Liu, Helan ε-type structures and Kang-Zang η-type structure.

COMPLICATED STRUCTURE OF NANNOFOSSILS IN LIMEMUD LIMESTONE AND CLASSIFICATION OF THEIR ORIGIN AND STRUCTURE

Huang Xingzheng

1985, 7(1): 47-54. doi: 10.11781/sysydz198501047

Abstract(494) PDF-CN(372)

Abstract:
This paper deals with 118 samples of limemicrtescanning electron micro-scope (SEM) is mainly used on studying the structure of ultrafossils in limemicrete, the diameter of ultrafossils discovered in limemicrite is about 5-30μ the shapes can be described as walnut, regular round and ellipes, irregular round and ellipse, bottle, sowl, star, gear, whell, flower shape, etc.. In the last decade the ultrafossil plates were established from the period of Jurassic.This paper mainly studies on the old stratum prior to Jurassic.At present, however there is no standard fossil plate available for reference, so problematical ultrafossils are advanced for the discussion. In addition, the structures visible in the thin section and relative to the activity of algae life are analyseed. It is one of the basis by which the biogenie micrograin of limemicrite is ascertained. Three geneses of limemicrite can be observed under SEM., as follows:chemogenic, mechanogenic and biogenic. They are distinguished one from another according to their structures. It is suggested that a genetic prefix should be added to limemicrite, that means on the basis of the structure nomenclature of limemicrite/grain content to add a genetic nomenclature.

SEDIMENTARY FACIES OF CARBONIFEROUS IN SICHUAN-HUBEI AREA AND ITS PETROLIFEROU-SNESS

Yu Jinshou, Wang Huamin, Li Tieshen

1985, 7(1): 55-59. doi: 10.11781/sysydz198501055

Abstract(485) PDF-CN(229)

Abstract:
According to Lithogy, texture, structure of Carboniferous in Sichuan-Hubei area, three facial regions are identified. 1.continental facial region; 2.onshore facial region; 3.carbonate platform facial region. The onshore facial region is well developed in Eastern Sichuan,which is a prospecting zone of oil generation and oil storage. The carbonate platform facial region appears to be a promising reservoir. By analysing the distribution of facial regions, it is suggested that in view of prospecting, gas is more favorite rather than oil; in view of strati-graphic sequence, the Middle Carboniferous System is the best; in view of area, it is the Eastern Sichuan, Western Hubei, and Jianghan are more important.

EVALUATION AND EVOLUTION OF THE MAJOR RIFT VALLEY OF MESO-CENOZOIC IN EASTERN CHINA

Wu Zhenming, Liu Hefu, Tang Liangjie, Gao Jinxi

1985, 7(1): 60-69. doi: 10.11781/sysydz198501060

Abstract(577) PDF-CN(490)

Abstract:
The main rift systems developed in Eastern China are Huaxia rift system, Fengwei rift system and Taidong rift system et al. Take Huaxia rift system as a typical example of continental rift evolution, which can be devided into four stages: dome and fracture stage, Spreading stage, rigional depression and depauperization stage, along with the evolution of rift valley there were mainly five types of structures: horst and graben fault (or basin and range structure); antithetic tilted fault block; symthetic tilted fault-block) step slip fault. Generally,the types of rift valleys are related to taphrogemic movement and orogeny, e.g. (1)impactogenic rift (Fengwei rift system) is related to arch trace) (2) convergent marginal rift (Taidong rift system) is related to oblique convergeny (3) continental fracturing rift (Huaxia rift system) is related to tensional shear fracture. Thus, the development of eastern rift system was controlled by the combination of taphrogeny,orageny, shearing, and gravitivity, while basal slip might be the dynamic force that caused the extension of rift valley. Rift valley basin is among the type of basin that has very promising prospect.

INFRASTRUCTURES OF LOWER YANGTZE BASIN AND THEIR RELATION TO EVOLUTION OF THE BASIN

Ding Youwen, Zhu Huijuan, Yun Lingling, Hu Dezhao, Xu Mingjie, Wang Shunling

1985, 7(1): 70-78. doi: 10.11781/sysydz198501070

Abstract(549) PDF-CN(365)

Abstract:
Data of seismic sounding from two profiles shot in Yougping county, Jiangxi Province and Shui county, Hubei Province, which have been coupled with characteristics of regional Bouguer gravity anomalies, are digitized and processed to prepare a crustal isopachous map. It is concluded that, in general, the neotectonic movement were taken place in an overall tensional setting. Through tectonic cycles of Yanshan orogeny, Himalayan orogeny, Nworiented compressional movement of Pacific plate against Ryukyu region and the subduction of the Pacific Plate at the Ryukyu trench, the Ryukyu arc was separated from the Asian continent and, parallelling to the arc,the Nw-trending Okinawa trough and the East China Sea basin occured simultaneously in back arc area, resulting in a tectonic pattern of intersection of the present East China Sea basin with the NW-trending North Jiangsu-Southern Yellow Sea basin.

1985, 7(1): 79-79. doi: 10.11781/sysydz198501079

Abstract(389) PDF-CN(242)

Abstract:

1985, 7(1): 80-81. doi: 10.11781/sysydz198501080

Abstract(362) PDF-CN(229)

Abstract:

1985 Vol. 7, No. 1

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