石油实验地质

DISCUSSION ON THE DISTRIBUTION OF THE TRIASSIC SYSTEM IN SOUTHERN NORTH—CHINA

Zhou Xingxi, Yuan Rong

1984, 6(2): 87-94. doi: 10.11781/sysydz198402087

Abstract(531) PDF-CN(310)

Abstract:
This article presents the distribution pattern of the Triassic System in Southern North-China.It is stated that the Triassic System in the area studied is an extensive and stable clastic formation of continental facies.The original depositional thickness and settings have been reconstructed through analyzing the burial-thermal evolutional history.

SEDIMENTATION AND HYDROCARBON POTENTIAL OF EARLY TRIASSIC CARBONATE ROCKS OF SHIWAN DASHAN BASIN IN GUANGXI

Zeng Hui

1984, 6(2): 95-100. doi: 10.11781/sysydz198402095

Abstract(653) PDF-CN(364)

Abstract:
It is reported that marine deep-water carbonate rock rich in hydrocarbon resources can be assigned to the transitional facies between continental slope and deep sea basin.Nevertheless,this paper argues that the example given here is an exception.Tectonic background,sedimentation,sedimento-structural feature of the deep-water carbonate rock facies of the platform fault-scarp slope are studied.An attempt to classify breccia of this facies is made and the depo-sitional models of the slope are establ ished.Assessment of its hydrocarbon potential shows bright oil and gas prospects of deep-water carbonate rock on the fault-scarp slope of early Triassic platform in the Shiwan Dashan Basin in Guangxi.

APPLICATION OF THE CONCEPT OF THE SEE—SAW ACTIVITY IN SEARCHINC FOR OIL

Yan Xiugang

1984, 6(2): 101-107. doi: 10.11781/sysydz198402101

Abstract(477) PDF-CN(307)

Abstract:
See-saw activity is one type of crustal wavy movement.This activity has occured from west to east and even from land to sea across the Chinese continent during various geological time.It takes the uplifts(or intrabasinal sub-uplifts)and the fault zones between platform and basin as the axis in its see-saw rocking turn,controlling the growth and development of the basin and the distribution of oil and gas.This article makes a preliminary approach to the relationship between the major petroliferous basins and the see-saw activity on the basis of the concept of crustal wavy movement and mosaic tectonics.The effect of this see-saw activity upon the formation of oil and gas deposits is also discusssed.

APPROACH TO THE CONTROL OF THRUSTING OVER MIGRATION AND ACCUMULATION OF OIL AND GAS

Tan Min

1984, 6(2): 108-117. doi: 10.11781/sysydz198402108

Abstract(499) PDF-CN(360)

Abstract:
This article makes an approach to the control of thrusting over migration and accumulation of oil and gas in light of the characteristics of the thrusts during their development.It is believed,through theoretical derivation and comparing the results of simulation experiments with the objective reality,that it is most possible for oil and gas to accumulate in places where the thrust surface becomes steeper.It is suggested that geologists should pay more attention to this belt in search of oil and gas deposits.This article focuses discussion on the control of thrusting over migration and accumulation of oil and gas,rather than the process of their migration or accumulation.It is hoped that this paper could provide useful informations for the search of additional oil and gas resources in thrust belts and for further advancing the works on new domains and new areas.

ON RELATIONSHIP BETWEEN THE PERIOD OF OIL GENERATION—MIGRATION AND THE STRUCTURAL SETTINGS FROM THE YUJIANG STAGE OF LOWER DEVONIAN TO LOWER CARBONIFEROUS IN THE CENTRAL GUANGXI DEPRESSION

Hua Xiuxiang, Nong Bin

1984, 6(2): 118-123. doi: 10.11781/sysydz198402118

Abstract(562) PDF-CN(326)

Abstract:
According to the informations of subsurface geothermal data,the burial history of source rocks and the main characteristics of the tectonic stages,this paper discusses the relationship between the main period of oil generation-migration and structural settings from the Yujiang Stage of Lower Devonian to Lower Carboniferous in the Central Guangxi Depression.It is believed that the main period of oil generation-migration of the Devonian System came to an end at an earlier time.It is advisable to search for gas rather than oil in structures and other types of traps formed during Dongwu and Indo-China movements.For searching of oil,it is necessary to study structures and other types of traps of pre-Dongwu movement.However,the main period of oil generation-migration of the Lower Carboniferous completed at a later time,oil and gas formed in these source rocks could be trapped in structures and other types of traps of the Indo-China or pre-Indo-China movements,which should be regarded as the principal target for exploration.

COMPREHENSIVE EXPLANATION OF SEISMIC STRATIGRAPHY OF THE QIAOBAI AREA IN THE DONGMIN DEPRESSION

Lou Shiyi, Chen Xueying, Lei Zhifu

1984, 6(2): 124-132. doi: 10.11781/sysydz198402124

Abstract(640) PDF-CN(290)

Abstract:
On the basis of seismic informations obtained from analogue magnetic tape,this article gives comprehensive explanation of the various seismic information and the results of drilling and logging in the Qiaobai district in Dong-min Depression.Examples are cited to demonstrate the foundation and methodology of explaining seismic facies analysis,velocity analysis and regional sedimentary facies analysis.New basis is provided for deepening the explanation of the seismic information obtained from analogue magnetic tape,for dividing the lower Tertiary sedimentary facies of this area and for predicting its lithofacies as well.The lithofacies zones favourable for oil and gas accumulation,local structures and the possible sites for planning drill are indicated in the article.

SEDIMENTARY CHARACTERISTICS OF THE MESO—CENOZOIC BASINS IN ZHEJIANG PROVINCE AND ITS RELATIONSHIP WITH TECTONICS OF THE ZHEMIN UPLIFTZONE

Xu Ronyuan

1984, 6(2): 134-141. doi: 10.11781/sysydz198402134

Abstract(521) PDF-CN(319)

Abstract:
The numerous basins of small and medium size in Zhejiang Province can be grouped according to their tectonic origin into four types,i.e.,Shou-chang,Yongkang,Jinqu and Tiantai.Basins of the same type were formed in the same period with similar structural features and evolutional history.Classification of the basin types provides informations of the structures which may serve as the basis for analogizing basins and estimating oil and gas resources.Classification of basins can be carried out according to their basinal outlines and structural trends.Therefore,overlapped basins or the deeper strata of basins can be predicted.Through studies on the structures of basins,paleo-stress field in the Zhemin uplift zone and the structural history cf the uplift can be reconstructed.This would be helpful in the search of the basement structures of the Yellow Sea and East China Sea and making assessment of oil and gas resources in this attractive area.

ON ORGANIC ORIGIN OF ORE DEPOSIT IN VIEW OF THE SEDIMENTARY ENVIRONMENT OF DARK SILICEOUS ROCKS OF SEDIMENTARY TYPE

Li Daoqi

1984, 6(2): 142-145. doi: 10.11781/sysydz198402142

Abstract(516) PDF-CN(283)

Abstract:
It is proposed in this paper that the sedimentary dark siliceous rock is of enclosed gulf facies or lagoon facies according to the characteristics of rocks,minerals and paleontology.This denies the possibility of regarding them as of swamp or deep sea facies.Dark siliceous rock is essentially a kind of biological skeleton boundstone.This kind of rock serves not only as favourable source rock and reservoir but also as favourable bed for metal to be enriched there to form various kinds of ore deposit.Further study on the formational condition of this kind of rock, its sedimentary environment and changes in the landscape can be of much help in reconstructing the global tectonic of both the past and the present.

1984, 6(2): 146-150. doi: 10.11781/sysydz198402146

Abstract(417) PDF-CN(233)

Abstract:

PROBABILITY DISTRIBUTION OF ORGANIC MATTER ABUNDANCE IN INORGANIC ROCKS

Yang Wenkuan

1984, 6(2): 151-157. doi: 10.11781/sysydz198402151

Abstract(570) PDF-CN(274)

Abstract:
It is shown by experience that the abundance of organic matter in inorganic rocks accords with the Γ-distribution,which is denoted as:where y is the probability density,x the organic matter abundance,6 the the minimum value of x,and a and β the parameters determining the patterns of the distribution curve,respectively.When the mean value of samples x and the standard deviation S are obtained,a and β can be defined by.

1984 Vol. 6, No. 2

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