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1995 Vol. 17, No. 2

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PRELMINARY APPROACH TO THE FAULTING GENERATIONS OF THE TARIM BASIN
Gong Ming, Shao Hongliang, Wu Hong, Wang Zehou
1995, 17(2): 105-113. doi: 10.11781/sysydz199502105
Abstract(647) PDF-CN(436)
Abstract:
The faulting evolution of the Tarim Basin has gone through four generations,that is,the normal fault generation of the Caledonian age,the thrust generation of the Haixi age,the thrust-strike-slip fault generation of the Indo-Chinese-Yanshan age and the thrtist-detechment-strike-slip fault generation of the Himalayan age.Stich evolution from an unary structural generation into ternary sturcttiral generations reflects that the faulting is sub-jected to the superimposition or reformation of tectonic movement many stages and many times during the process of evolution.The regional stress fields reflected by the faulted structure of four generations are compressional stress fields close to north-south direction except that the first generation is an extensional stress field of north-south direction.
PETROLEUM GEOLOGICAL CHARACTERISTICS OF AND EXPLORATION PROPOSALS TO BACHU-MAIGAITI AREA OF THE WEST TARIM BASIN
Zheng Xianhua
1995, 17(2): 114-120. doi: 10.11781/sysydz199502114
Abstract(696) PDF-CN(358)
Abstract:
The both sides of the Bachu Uplift in the west Tarim Basin,especially the MaigaitiSlope of the west side,are prospective oil land and key exploration area in the near futureas well.In this paper,the basic characteristics of petroleum geology of this area and its generating-bearing-capping relations have been approached,and some proposals for exploration deployment have then been suggested.
TECTONIC DEFORMATION OF PALEOZOIC BASINS IN THE NORTHERN END OF THE YANGTZE AREA
Ji Rangshou, Qin Deyu, Gao Changlin
1995, 17(2): 121-130. doi: 10.11781/sysydz199502121
Abstract(627) PDF-CN(296)
Abstract:
Three sets of prototypical basins developing within paleozoic era in the northern end of the Yangtze area are hunchbacked-loaded on the" basement" of differemt properties.They have gone through four stages of regional tectonic deformation sticcessively.Each has evolved a unique style of basin deformation.And there are six kinds of differeiit tectonic combinations.Study on the succession of Paleozoic basin deformation and its regularity has an important significance for searching the oil and gas pools of Paleozoic era.
PRELIMINARY ANALYSIS ON THE DISTRIBUTION PATTERNS OF COAL SEAMS IN THE JURASSIC SYSTEM OF THE NOKTH SONGLIAO BASIN
Li Yuzhan, Fu Taihua, Wang Chunchang
1995, 17(2): 131-137. doi: 10.11781/sysydz199502131
Abstract(615) PDF-CN(252)
Abstract:
The Shahezi Formation of Jurassic system the main coalg-athering position of the North Songliao Basin,The environment of stable tectonic movement is advantageotis to the generation of thicker coal seams.Coal seams are mainly distributed in the eastern block-rolling area.And coal-gathering environment is dominated by fluviolacustrine deltas.So the reflecting features and distribtition ranges of coal seams can be determined by means of seismic data.
ANAPPROACHTOTHEGEOCHEMICALCHARAClERISTICSAND GAS SOURCES OF NATURAL GAS IN THE NORTH TARIM BASIN
Li Xiaiiqi, Dai Jinxing
1995, 17(2): 138-146. doi: 10.11781/sysydz199502138
Abstract(612) PDF-CN(345)
Abstract:
In this paper,the geochemical characteristics and geiietic types of nattiral gas in the North Tarim Basin are comprehensively analysed from the respects of gas compositioins.carbon isotopes and associated condensates.Moreover,the gas sotirces of natural gas in this area are approached by means of carbon isotope characteristics and migration index(△Ｒ３).
GENERATION AND EVOLUTION MODELS AND PKIMARY MIGRATIONATION FEATURES OF BIOGASES
Li Mingzhai, Zhang Hongwu, Gao Jianjun
1995, 17(2): 147-155. doi: 10.11781/sysydz199502147
Abstract(633) PDF-CN(369)
Abstract:
In this paper,thegeneration and evolution models and primary migration features of biogases are mainly studied,and then the relations between their generation and migration are approached.The research indicates that biogases mainly have two inborn states and two migration patterns.The time of their large-scale migration is within their main gas-generating period.And their migration orientation is along the direction of buoyancy and residual pressure.They make short-distance migration from gas-generating centres to favorable traps nearby.
ANALYSIS ON ORGANIC ACID COMPOSITION IN THE OXIDIZED PRODUCTS OF DIFFERENT TYPED KEROGENS IN THE NOKTH SONGLIAO BASIN ANDSTUDY OF ITS EFFECTS ON RESERV OIR STRUCTURE
Huang Futang, Zou Xinfang, Jiang Hongqi, Zhang Zuoxiang, Wang Jiangui
1995, 17(2): 156-166. doi: 10.11781/sysydz199502156
Abstract(719) PDF-CN(368)
Abstract:
The analytical method of organic acids in the oxidation tests and oxidized products of kerogens is set up on the basis of a large number of indoor conditional tests.And for the first time,different typed kerogens from the Sanzhao area of the North Songliao Basin are studied using this method.By means of detecting on various ions in different comcentration of the organic acid-soaked solution of fifty-four cores from three wells and analysing and studing meanwhile on the physical properties of rocks and the changing characteristics ofpore structure,it is found that 1)different typed kerogens have clearly different oxidation yields,and 2)the existeiice of organic acids plays an important role in the developing ofthe secondary pore space of reserviors.These experimental studies give us a preliminary understanding of the genesis of secondary pore space and provicle an important scientific basis for searching the developing areas of secondary pore space in future.
RESEARCH AND SIGNIFICANCE OF VOLCANIC TUFF FROM MID-ORDOVICIAN SERIES IN THE SOUTHERN MARGIN OF THE ORDOS BASIN
Yuan Weiguo
1995, 17(2): 167-170. doi: 10.11781/sysydz199502167
Abstract(727) PDF-CN(451)
Abstract:
On the basis of the research of the petrochemical characteristics of volcanic tuff from Mid-Ordovician series in the southern margin area of the Ordos Basin,the author considers that the volcanic tuff of this area belongs to calc-alkaline rock series and tholeiite series respectively.According to δ-τ index diagrams and other judgement indexes,the author also believes that volcaiiic tuff is an island arc eruption product.This provides evidences forthe further analvsis of tectonic environments in Middle Ordovician epoch.
CARBON ISOTOPIC DISTRIBUTIVE CHARACTERISCS OF CRUDE OLL MONOMERS PRODUCED IN DIFFERENT SEDIMENTARY ENVIRONMENTS
Zhao Mengjun, Huang Difan
1995, 17(2): 171-179. doi: 10.11781/sysydz199502171
Abstract(678) PDF-CN(307)
Abstract:
In this paper,the on-line analytical technology of gas chromatography-isotopic mass spectrography(GC/C/MS)of crude oil monomic hydrocarbons is applied combined with the discussion on the carbon isotopic distribtition of crtide oil monomic hvdrocabons to make preliminary genetic classification according to the sedimentary environments of their source rocks,This can yet be regarded as an efficient method in the oil-oil and oil-source rock correlations.
APPLICATION OF THE PRASS 1 EVALUATION SYSTEM OFOIL AND GAS RESOURCES TO THE QINTONG DEPRESSION IN NORTH JIANGSU PROVINCE
Liu Wei, Zhang Huai
1995, 17(2): 180-185. doi: 10.11781/sysydz199502180
Abstract(677) PDF-CN(336)
Abstract:
The PRASS 1 evaluation system of oil and gas resources is noted for its easiness,fastness and reliableness.Its application in the Lower Tertiary play of the Qintong Depression in North Jiangsu province indicates that the evaluation results(the distribtitive scale of oil and gas pools)accord with the law of lognormal distribution,and are basically consistent with practical exploration effects and the geologists'understanding of the geological regularity of this area.
EFFECTS OF PORE EVOLUTION ON OIL AND GAS DISTRIBUTION IN THE TRIASSIC SYSTEM OF LUNNAN AREA IN THE TARIM BASIN
Xu Zhiqiang
1995, 17(2): 186-192. doi: 10.11781/sysydz199502186
Abstract(588) PDF-CN(230)
Abstract:
According to tbe data of drilling,core analysis and geochcmistry of wells deeper than 4000m in the Triassic system of Lunnan area,the author analyses and studies the geneses and evolutionary patterns of deep reservoirs and concludes that the type of the effective storing and gathering space of deep clastic rocks in the Triassic system of Lunnan area is secondary solution pore space.Based on the source of polar solution.the solution pore space in the deep Triassic system is divided into pore space of two-stage evolution,The solution pore space of Ⅰ stage is the main site for oil and gas accumulation,and the solution pore space of Ⅱ stage is the site for the redistribution and late-stage accumulation of oil and gas.On the basis of the study of pore evolution combined with sandbody distribution and its relation to oil-generating depressions,it is considered that the Triassic system of South Lunnan area is a favorable place for prospecting the oil and gas pools of solution pore space-typed reservoirs.
MAN-COMPUTER INTERACTIVE PREDICTION ON THIN-INTERBEDDED SANDSTONE RESERVOIRS
Wen Xiangquan
1995, 17(2): 193-200. doi: 10.11781/sysydz199502193
Abstract(698) PDF-CN(244)
Abstract:
In the exploration of continental basins,the prediction of thin-interbedded sandstones is always a difficult problem which perplexes the work of exploration and development.Based on the data of high-resolution treatment in this paper,the amplitude plane of reflected waves in a target stratum is orthographically demonstrated and drew by means of a seismic model on the GEOQUEST system of man-computer on-line interpretation,And then the cumulative sandstone thickness and amplitude value in practical drilling are applied to fit their relational curve,According to this relational curve,an amplitude plan is converted into a semi-quantitative plan for sandstone prediction,and drilling coincidence ratios are preliminarily confirmed.
A METHOD FOR THE CALCULATION OF HYDROCARBON-GENERATION QUANTITY BY THE RELATIONAL DIAGRAMS OF HYDROCARBON CONVERSION RATE DURING KEROGEN PYROLYSIS
Zhang Zhihuan, Zhang Wanxuan, Fang Zhaoliang
1995, 17(2): 201-209. doi: 10.11781/sysydz199502201
Abstract(1036) PDF-CN(251)
Abstract:
The calculation method of hydrocarbon-generation quantity introduced in this paper has given consideration simultaneotisly to four factors such as the type,abundance and maturity(degree of heat subjected)of organic matter and the compositional characteristics of clay mineral.The concrete method is to perform multiple pyrolyses using a CDS 820 GS analytical system after mixing kerogen with three clay mineral as illite,montmorilonite and kaolinite in certain proportion,record the experimental results under different experimental conditions,and develop"the relational diagrams of hydrocarbon conversion rate during kerogen pyrolysis"aiid other relatioiial diagrams respectively,And then hydrocarbon-generation quantity can be calculated by combining these diagrams with other geological and geochemial data.
AN APPROACH TO THE GENESIS OF CARBON DIOXIDE FROM THE THERMAL HYDRILYSIS MODELLING EXPERIMENT OF CARBONATE SOURCE ROCKS
Gao Gang, Gang Wenzhe, Hao Shisheng
1995, 17(2): 210-214. doi: 10.11781/sysydz199502210
Abstract(617) PDF-CN(335)
Abstract:
Based on the analysis of carbon dioxide(CO2)produced by the thermal hydrolysis modelling experiment of three sorts of calcium-bearing carbonate(CaCO3)source rocks,the genesis of carbon dioxide(CO2)in the gaseous products is approached.There exists both organic and inorganic genesis.The higher the content of calcium carbonate and the finer the grains of rocks,the higher the yield of inorganic carbon dioxide.The generation of inorganic carbon dioxide restrains the organic material of calcium-bearing carbonate source rocks from producing hydrocarbons at some degree.

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