石油实验地质

GEOCHEMICAL ANOMALIES OF INTEGRATED OIL/GAS EXPLORATION IN SHUANGHE OIL FIELD AND ITS SIGNIFICANCE IN SEARCH OF OIL

Zhang Jinlai

1987, 9(1): 1-7. doi: 10.11781/sysydz198701001

Abstract(439) PDF-CN(296)

Abstract:
Intergrated geochemical exploration of oil/gas, including hydrochemical and △C methods, was carried out in Shuanghe Oil Field. Hydrochemical anomaly pattern and the △C anomaly pattern were established. The hydroche-mical measurement consists of the concentrations of methane, benzene, and phenol, Ultraviolet absorption spectrum, and fluorescence spectrum. Thus, the oil/gas exploration of Miyang Oil Field is under the guidance of the hydrochemical anomaly pattern of Shuanghe Oil Field, and judged by the carbon isotopic composition of some of the samples, the hydro-chemical anomalies in Miyang Depression were evaluated, and favourable prospecting areas and sections for oil/gas exploration were proposed.

THE SEPARATION OF PHENANTHRENE AND ITS HOMOLOGUES FROM AROMATIC HYDROCARBONS BY THIN-LAYER GAS CHROMATOGRAPHY

Tian Xingguo

1987, 9(1): 8-12. doi: 10.11781/sysydz198701008

Abstract(564) PDF-CN(260)

Abstract:
In this paper, thin-layer gas chromatography is used to separate the phenanthrene and its homologues. The high resolution of this method not only eliminates the interference of saturated hydrocarbons, but also the interference of other aromatic hydrocarbons, so that the gas chromatographic determination is more accurate, reliable, and rapid.

GEOLOGICAL CHARACTERS AND THE ORIGINS OF THE NATURAL GAS OF HUANGHUA DEPRESSION

Gao Xixing, Tian Shideng

1987, 9(1): 13-21. doi: 10.11781/sysydz198701013

Abstract(519) PDF-CN(248)

Abstract:
The natural gases of Huanghua Depression are derived from various sources. On the basis of the geological characters of the natural gases in the studied area, the occurrence and the compositional features of the gas-pays and their associative relationship to crude oil are studied. The natural gases can be classified into five types, i.e. pure natural gas, gas-top gas, associated gas, condensate gas, and CO₂ gas. Based on the composition, dryness, and the features of carbon isotopic composition, the origins of the natural gas in the area have been analyzed. The hydrocarbon gases can be divided into biogenic gas, near-surface mixed gas, thermogenic gas and deep source mixed gas. The non-hydrocarbon gases can be classified into deep-sourced gas and thermogenic gas or/and the mixed gas.

SIMULATING EXPERIMENT ON HYDROCARBON EXPULSION FROM ARGILLACEOUS SEDIMENTS

Lu Shue

1987, 9(1): 22-33. doi: 10.11781/sysydz198701022

Abstract(1096) PDF-CN(258)

Abstract:
The amount of hydrocarbons expelled from argillaceous sediments (or kerogen) under elevated temperatures and pressures is estimated through the experiment which simulated the conditions of geopressure, geotemperature, the contact of source bed and reservoir, and the anaerobic environment. It provides a basis for the appraisal of oil/gas resources. In addition, according to the result of the simulation, the mechanism of primary migration is discussed.

X-RAY DIFFRACTION STUDIES ON THE TEXTURES OF KEROGENS

Xin Guoqiang

1987, 9(1): 34-41. doi: 10.11781/sysydz198701034

Abstract(468) PDF-CN(312)

Abstract:
In this paper, the texture of kerogen is studied, using x-ray diffraction to determine the aromaticity of kerogen.According to the x-ray diffraction spectra, the microcrystalline parameter of the kerogen is calculated. The study indicates that the aromaticity is related to the types of kerogen, and keeps good relationship with the H/C atomic ratio of kerogen. The microcrystalline parameter bears a direct relationship to the evolutionary level of the kerogen, i.e. the higher the maturity, the higher the value of the microcrystalline parameter. Thus, it opens a new way for the study on kerogen.

GEOLOGICAL CHARACTERISTICS OF EAST CHINA SEA BASIN AND COMMENTS ON THE PETROLIFEROUS PROVINCE

Wang Guochun

1987, 9(1): 42-48. doi: 10.11781/sysydz198701042

Abstract(471) PDF-CN(351)

Abstract:
The East China Sea Basin is a giant Cenozoic sedimentary basin and the thickness of its sedimentary sequences exceeds ten thousand meters. The basement of the basin probably had experienced Hercynian folding, then had furthermore complicated by igneous rocks. The formative evolution of the basin may be divided into four stages, i.e. faultdown, downwarp, depression and draping during Eocene,Oligocene and Pliocene-Quaternary times, respectively. The tectonic framework is differentiated between the eastern and the western zones and between the northern and the southern blocks. There are various types of oil-gas pools, such as the gas pools and conden-sate oil pools in sandstones, the oil pools in the basement and the oil-gas pools in reefs. It is believed that giant oil-gas pools will be discovered by further exploration activities and detailed researches.

THE MIDDLE TRIASSIC DEBRIS FLOWS IN GUIZHOU PROVINCE

He Ziai, Yang Hong

1987, 9(1): 49-56. doi: 10.11781/sysydz198701049

Abstract(447) PDF-CN(256)

Abstract:
The Middle Triassic reefoid continental margin of Guizhou Province can be taken as the boundary between the shelf and the back-arc basin, where the carbonate sediment of the debris flows developed. Debris flows could be developed by fracturing and collapsing of reef-margin rocks due to the over pressure of pore-fluids and the suspension of clay-water matrices. As large fragments could not be suspended completely by the cohesive force and the buoyancy of the matrices, they had to roll, slide and bounce intermittently. The debris flows are distributed in the channel on the slop which stretched perpendicular to the strike of the reef margin. Since the channels are shallow and wide, there are slight washing surfaces around the lower limits of the infilling conglometates.

STUDY ON PERMO-CARBONIFEROUS TERRIGENOUS SOURCE MATERIALS AND THEIR PROVENANCES IN NORTH CHINA AREA

Xu Hui

1987, 9(1): 57-64. doi: 10.11781/sysydz198701057

Abstract(463) PDF-CN(317)

Abstract:
North China Area lined out in this paper is situated at east of Luliang Mountains and west of Tanlu Fault, and to north by Yanshan Mountain and Dabieshan Mountains to south, and it occupies about 600,000Km². In order to work up the Upper Paleozoic lithofacies-paleogeographic map, 2500 thin sections, more than 100 heavy mineral specimens and some catho-doluminescence samples have systematically been sampled from 30 drillings and surface profiles. Based both on the field observations and in laboratory analyses, the author summarized the characteristics of Permo-Carboni-ferous terrigenous elastics and the types of source rocks in the area. There-after, the distributive regulation for terrigenous elastics are studied in more details, and the provenances of the terrigenous source materials have been approached on the basis of investigation on the direction of paleochannel. It is concluded that there are various provenances for Permo-Carboniferous terrigenous materials in North China Area, totally about 4-5 provenance areas,as well as some local depositional areas dominated by mini-paleouplifts. Such as terrigenous sediments not only derived from ancient land of Yingshan, Funiushan and the eastern part of Shandong Province, but also from ancient lands of Dabieshan Mountains and Luliang Uplift, and Zhongtiao Ancient Land in short period. Therefore, the sediments in the area were transported from all parts of north, south, east and west, and at that time, the depo-center was located at Jiyuan-Zhengzhou Area which basically is of a stable subsidence area in subsequent geological history.

OIL/GAS MIGRATION IN THE NORTHWESTERN MARGIN OF JUNGGER BASIN

Hui Rongyao

1987, 9(1): 65-73. doi: 10.11781/sysydz198701065

Abstract(472) PDF-CN(318)

Abstract:
There is an oil-rich Kewu province in the northwestern margin of the Jungger Basin, The Kewu petroliferous province is an oil-accumulated zone of a large fault consisting of three subfaults of Chehong, Kewu, and Wuxia. The main source rocks in the Kelamaii petroliferous province are attributed to Permian System, and the source is derived from Mahu Lake Depression. Generally, the oil-gas migration occurred during the peried of Indosinian Movement, and the unconformities of Permo-Carboniferous and Permian-Triassic played a significant role in the oil-migration and accumulation from the depression to the margin of the basin.

RESEARCH ON THE CONODONT NEAR THE BOUNDARY BETWEEN CAMBRIAN AND ORDOVICIAN SYSTEMS IN JIANGSHAN—YANGLIUGANG REGION, ZHEJIANG PROVINCE

Ding Liansheng, Bao Dexian, Cao Haihong

1987, 9(1): 74-80. doi: 10.11781/sysydz198701074

Abstract(865) PDF-CN(257)

Abstract:
Based on the discovery of condont fossils near the boundary between Cambrian and Ordovician systems on the Jiangshan-Yangligang Section in Zhejiang Province, three fossil assembledges Zone are defined in this paper as. 1. Proconodontus muelleri, 2. Cordylodus proavus, 3.Utahconus-Monocostodus sevierensis. The biostratigraphic boundary between Cambrian and Ordovician systems is placed between the assembledges Zone of Cor-dylodus proavus and Utahconus-Monocostodus sevierensis. The defined groups (assembledges) of conodonts can be compared not only with those both at home and sbroad, but also with macro-fossil assembledges(groups). Furthermore, the defined boundary is coincided with those made by international working group on the boundary of Cambrian-Ordovician systems which was decided by votes.

APPLICATION OF CARBON-OXYGEN ISOTOPES TO CARBONATE ROCKS

Gao Renxiang

1987, 9(1): 81-86. doi: 10.11781/sysydz198701081

Abstract(477) PDF-CN(610)

Abstract:
Based on fractionating mechanism, controlling factors, the carbon and oxygen isotopic composition sedimentation, diagenesis and metamorphism carbonate rocks are studied in this paper. It is suggested that the isotopic com-position ofcarbonate rocks could be closely related with the sedimentary environment, diagenesis metamorphism and the source materials of the carbonate rocks, as well as with the maturation of organic matter.

1987 Vol. 9, No. 1

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