石油实验地质

Contents Vol.32,No.2 Apr., 2010

2010, 32(2)

Abstract(1113) PDF-CN(875)

Abstract:

THERMAL EVOLUTION DEGREE AND ITS HYDROCARBON GEOLOGICAL IMPLICATIONS OF THE MAIN STRATA SERIES IN THE SOUTHERN NORTH CHINA CRATON

Zhao Junfeng, Liu Chiyang, He Zhengguang, Liu Yongtao

2010, 32(2): 101-107. doi: 10.11781/sysydz201002101

Abstract(1402) PDF-CN(1028)

Abstract:
The southern North China Craton is one of the area in China experienced decades of exploration while no industrial reservoir has been found.To objectively evaluate the thermal status and its evolution processes is one of the key in this area.Based on more than 600 suits of Ro data and other geothermometer data,the thermal evolution characteristics and its hydrocarbon geological implications of the Paleogene,Mesozoic and Upper Paleozoic are discussed in this paper.The values of Ro from the Paleogene System are higher in the north and lower in the south.Most of the organic matter in Zhoukou Depression is immature and low mature,in contrast with the mature status in Jiyuan and Zhongmou Sags of Kaifeng Depression.Thermal evolution degree of the Mesozoic is higher than the one of the Paleogene in general.The Lower Cretaceous in Tanzhuang-Shenqiu Sags and the Trassic in Jiyuan sag are now in the peak liquid hydrocarbon-generating stage.The thermal evolution degree of the Upper Paleozoic shows strong heterogeneity in space,ranging from immature to overmature,and decreased from north to south.Taikang Uplift and adjacent northern Luyi Sag are inferred to well prospective area for normal nature gas or coal bed methane exploration.Some areas such as the mid-south part of Niqiuji Sag,the east part of Tanzhuang-Shenqiu Sags and the south of Xiangcheng Sag in Zhoukou Depression have the potential of secondary hydrocarbon generation.

CHARACTERISTICS AND MAJOR CONTROLLING FACTORS OF CARBONATES RESERVOIR IN THE MIDDLE ORDOVICIAN YIJIANFANG FORMATION, TUOFUTAI AREA, TAHE OILFIELD

Peng Shoutao, He Zhiliang, Ding Yong, Zhang Tao, Xia Dongling, Ji Shengzhen, Yun Jinbiao

2010, 32(2): 108-114. doi: 10.11781/sysydz201002108

Abstract(1459) PDF-CN(1224)

Abstract:
Based on analysis of 30 wells data of logging,well logging,oil production test,geophysical,and rock core and rock thin-section observation,the results show dissolved pores and/or caves,factures are the main reservoir spaces with low matrix porosity in Middle Ordovician Yijianfang Formation,Tuofutai area of Tahe Oilfield.On the plane the reservoir types have the feature of "north-south zoning distribution,east-west heterogeneity".The karst reservoirs mainly formed in middle Caledonian and were controlled by such factors as paleo-geomorphology,faults or fractures,lithology and facies,etc.,showing distinct features of fault-controlled and strata-bound.Thus it is predicted that the areas of favorable reservoir rocks would be developed in the congruent sites of the high position of Caledonian paleo-geomorphology,concentration area of faults or fractures and high energy reef-flat facies,which are mainly distributed in the middle and northern part of Tuofutai area.

STUDIES OF LAVA DEVELOPING FEATURES AND THE ACTION OF TECTONISM OF EASTERN AREA OF CHANGLING FAULT DEPRESSION

Wang Dexi, Lu Jianlin

2010, 32(2): 115-119. doi: 10.11781/sysydz201002115

Abstract(1391) PDF-CN(1003)

Abstract:
Volcanic rocks are well developed in the Changling Fault Depression.The lithology and lithofacies had been analysed systematically.The volcanic activity cycles of the Yingcheng Group had been divided into third and fourth cycles according the research of the evolution of tectonic cycle and the changes in intensity of volcanic eruptions;The controll process of the structure of Changling eastern area had been anatomized,and it obviously controlled the spatial and temporal distribution of volcanic rocks.The tectonic movement and later reconstruction are the main controll factors of volcanic rock traps.Fault zones are the favorable regions of volcanic reservoir exploration.

STUDY ON CONTROL FACTORS OF QUALITY OF COMPACT SANDSTONE RESERVOIR-TAKING HE8 FORMATION OF THE JINGBIAN GAS FIELD AS AN EXAMPLE

Xie Runcheng, Zhou Wen, Yan Ningping, Song Rongcai, Zhao Ankun, Wang Xin

2010, 32(2): 120-123. doi: 10.11781/sysydz201002120

Abstract(1312) PDF-CN(977)

Abstract:
The He8 Formation develops a set of excellent accumulation conditions,and is an important succeeding layer in the Jingbian gas pools.But the sandstone is tight,and its physical properties are not good.According to study on the characteristics of petrology,sedimentary microfacies and diagenesis,and so on,the following under-standings were obtained.The He8 Formation is low porosity and ultra-low permeability reservoir.The secondary intergranular pores are the main pore space.And the pore texture is not preferable.The distribution of reservoir is controlled by the deposition,but the deferent of physical properties is not remarkable in varies sedimentary microfacies.And mechanical compaction is a main factor which reduced the porosity in the He8 Formation.The kaolinite and chlorite had dual contribution to porosity,and the dissolution of aluminosilicate and carbonate is the controlling factor for high-quality reservoir development.

SEDIMENTARY TYPES AND CHARACTERISTICS OF LoWER CRETACEOUS RESERVOIR ROCKS IN TANZHUANG SAG, ZHOUKOU DEPRESSION, SOUTHERN NORTH CHINA BASIN

Chen Xiang, Zhang Qin, Zhu Xiaomin, Wang Xunjie, Ji Hancheng, Jiang Yongfu

2010, 32(2): 124-129. doi: 10.11781/sysydz201002124

Abstract(1522) PDF-CN(865)

Abstract:
Sedimentary types and properties of the Lower Cretaceous clastic rock reservoirs in the Tanzhuang Sag,Zhoukou Depression,Southern North China Basin are studied in this paper based on data of core,well logging and thin-section.Two ways of sediment provenance exist in the Tanzhuang Sag during the Early Cretaceous.The south of the basin mainly develop fan delta facies from south.The north of the basin mainly develop delta facies from north and northwest.The center of the basin mainly develop lacustrine and turbidite fan.Reservoir rocks consist of glutenite and sandstone with low componential and textural maturities.Fine sandstone is the dominant rock type.Clastic reservoir properties are very poor due to low rock maturity,strong compaction and cementation as well as weak dissolution.Reservoirs with different generation types have different properties.Delta-plain sandstones buried less than 2 200 m deep have the most effective reservoir properties.As depth increases,the properties fall rapidly.At the same depth,reservoir properties reduce from fan delta front and fan delta plain to shore-shallow lacustrine.

A COMPARATIVE STUDY OF RESERVOIRS OF THE CHANGXING AND FEIXIANGUAN FORMATION BETWEEN PUGUANG GASFIELD AND JIANNAN GASFIELD IN THE SICHUAN BASIN

Guan Honglin, Jiang Xiaoqiong, Wang Shuyi, Bao Yunjie

2010, 32(2): 130-135. doi: 10.11781/sysydz201002130

Abstract(1352) PDF-CN(1004)

Abstract:
Puguang Gasfield and Jiannan Gasfield are located in Northeast Sichuan Basin.As the main gas bearing zones,the Permian Changxing and Triassic Feixianguan Formations are all reef-bank deposits.However,the reservoir scale and property are greatly different between Puguang Gasfield and Jiannan Gasfield.The reservoirs in Puguang Gasfield are mainly a large set of dolomites with the characteristics of dissolution pores,great thickness,medium porosity and medium permeability,high porosity and high permeability.However,the reservoirs in Jiannan Gasfield are mainly limestones and a little dolomites with the characteristics of thin thickness,low porosity and low permeability.Based on the comparative study on the formation conditions,the primary factor for differences towards the reservoirs between Puguang Gasfield and Jiannan Gasfield is the origin of the dolomites.The former well developed penecontemporaneous dolomitization and formed a large set of dolomites while the latter developed burial dolomitization and formed a little dolomites.Correlation analysis results showed that there is a close correlation to the differences of the sedimentary environment.The reef-bank facies are adjacent to the restricted platform facies or evaporate platform facies in Puguang Gasfield,however,which are adjacent to the open platform facies in Jiannan Gasfield.As a result,the former is easier to acquire saline water of high Mg/Ca values and beneficial to penecontemporaneous dolomitization while the latter is not avail to penecontemporaneous dolomitization.Consequently,it is suggested that the reef-bank facies adjacent to the sedimentary environment such as restricted platform facies or evaporate platform facies are advantageous to forming quality reservoirs.

THE DEEP RESERVOIR EXPLORATION ANALYSIS IN THE GANCHAIGOU REGION OF NORTH AREA OF WESTERN QAIDAM BASIN

Lu Jungang, Chen Shijia, Ou Chenghua, Zhang Daowei, Xue Jianqin, Wang Mingfa

2010, 32(2): 136-139. doi: 10.11781/sysydz201002136

Abstract(1352) PDF-CN(1394)

Abstract:
Ganchaigou area is located in the transition zone from the south to the north of Western Qaidam Basin,which has the Shizigou enriched sag in the southwest.Although it is the hot exploration area of the Qaidam Basin,it doesn't has larger exploration breakthrough.Based on the analysis of the geological and geochemical features of source rock and the reservoir extract,this paper points out that the oil source is sufficient in this area and the feature of reservoir extract of the deep structure is same with that of E23 source rock of the Ganchaigou region and the Shizigou Sag.This paper analyses comprehensively the structure and reservoir features and pointes out that source-reservoir-cap assemblage is good in this area,and deep structure of the Chai 3 well area especially has better oil-gas exploration potential.

RESEARCH OF SEDIMENTARY FACIES OF FORTH MEMBER OF YINGCHENG FORMATION IN XUJIAWEIZI FAULT DEPRESSION IN THE SONGLIAO BASIN

Luo Jiaqiang, Ren Yanguang, Wu Chaodong, Liu Wenlong

2010, 32(2): 140-146. doi: 10.11781/sysydz201002140

Abstract(1412) PDF-CN(1273)

Abstract:
The Xujiaweizi Fault Depression is a half graben-like fault basin that is fault in the west and transgression in the east in tectonic style,and that is thicker in the west and thinner in the east in formation thickness.There have the characteristic of multi-depocenter,many and near matter source.The volcano is the main matter source in Anda aera.By means of the research of rock core observation more than 20 wells,and well logging,seismic,test data and so on,there has chiefly a set of coarse fragment sedimentation of river and lacustrine facies from gritstone to cobblestone in K1yc4;there are 7 lithofacies types and 5 depositional systems.In it,there are fan delta sedimentary system in the north of research area in the lower member of K1yc4,there are alluvial fan and flood basin in the south.There are mainly braided delta sedimentary system in the east of Songxi Fault and fan delta sedimentary system in the west of Songxi Fault in the upper member of K1yc4;there are mainly delta sedimentary system in the south.But there are shore and mere sediment in the front of every depositional system.

ORIGIN OF DOLOMITE OF ORDOVICIAN MAJIAGOU FORMATION, WESTERN AND SOUTHERN MARGIN OF THE ORDOS BASIN

Huang Qingyu, Zhang Shaonan, Ding Xiaoqi, Duan Jie, Xiang Lei

2010, 32(2): 147-153. doi: 10.11781/sysydz201002147

Abstract(1500) PDF-CN(1593)

Abstract:
A large amount of dolomite is developed in the Ordovician Majiagou Formation in western and southern margin of the Ordos Basin.The massive dolomite which has large exploration potential mainly distributes in the northern Tianhuan Depression and Weibei Uplift.Based on the study of outcrop section and borehole core,the lithology and mineralogy characteristics,the geochemical data and sedimentary diagenetic-structural setting,the dolomite in study area can be divided into three types: penecontemporaneous dolomite,burial dolomite and hydrothermal dolomite.Penecontemporaneous dolomite developed in Majiagou Formation Member 1,3 and 5.Its origin is evaporative pumping dolomitization.The genesis of burial dolomite which forms main body of the dolomite of Majiagou Formation can be explained as seepage-reflux dolomitization during shallow-burial stage and compacting flow dolomitization and landform-driven flow dolomitization.Hydrothermal dolomite which fills in fractures is discovered in Dingbian,Fuxian,Huangling and Linyou area.The deep thermal fluid rising along faults and fracture systerm is relate to the origin of hydrothermal dolomite,it plays an important role in forming reservoirs in this area.In addition,this article describes the textural characteristic and evolution of the dolomite,for having an intuitive cognition with the forming process of various types of dolomite.

FORMATION OF THE SUBTLE RESERVOIRS AND THEIR EXPLORATION IN THE CENTRAL JUNGGAR BASIN

Mu Kun, Yun Jinbiao

2010, 32(2): 154-158. doi: 10.11781/sysydz201002154

Abstract(1273) PDF-CN(889)

Abstract:
The deep sag was located in the depression of the Junggar foreland basin.The early hydrocarbon accumulation in reservoirs,the development of fluvial-delta sand body and the distribution of unconformity and sequence overlaps were controlled by the Chepaizi-Mosuowan paleo-uplift formed in the Jurassic.The subtle reservoirs consisted of stratigraphic,lithologic,faults or their combination were developed in the area.Due to late strong tilting,trap types and their validity around the paleo-uplift were changed.The reservoirs underwent late modification and late hydrocarbon recharge and various kinds of reservoirs were formed.Hydrocarbon formation and distribution in the deep sag was controlled by the paleo-uplift.

OIL AND GAS RESOURCES IN CENTRAL ASIA-AZERBAIJAN REGION AND THE COOPERATION POLICY

Zhang Qingyun

2010, 32(2): 159-163. doi: 10.11781/sysydz201002159

Abstract(1418) PDF-CN(853)

Abstract:
The objective of the cooperation on oil and gas is to obtain oil and gas resources.Thus,it is necessary to study the distribution of resources.Favorable investment environment and stable investment policies are the premise for the cooperation object to carry out smoothly and obtain benefit in the end.However,the non-uniform distribution of oil and gas resources,different investment environment and foreign cooperation policies exist in Central Asia and Azerbaijan.On basis of analysis of the total resources and their distribution in Central Asia and Azerbaijan region,the investment policies in host country of the resources was studied and 4 recommendations were made for extending cooperation with those host countries.

CHARACTERISTICS OF ULTRAMICROSCOPIC ORGANIC LITHOLOGY OF EXCELLENT MARINE SHALE IN THE UPPER PERMIAN SEQUENCE, SICHUAN BASIN

Qin Jianzhong, Fu Xiaodong, Shen Baojian, Liu Weixin, Tenger, Zhang Qingzhen, Jiang Qigui

2010, 32(2): 164-170. doi: 10.11781/sysydz201002164

Abstract(1392) PDF-CN(1463)

Abstract:
The characteristics of ultramicroscopic organic lithology of excellent marine shale were investigated by means of whole rock X-ray diffraction and Scanning Electron Microscopy(SEM) equipped with Energy Dispersive Spectrometer(EDS).Excellent marine shales consisted mainly of quartz and calcareous mineral(calcite),the content of clay minerals such as illite and montmorillonite was commonly lower than 20% and the average was only about 5%.The total organic carbon content(TOC) had a positive correlation with the quartz content but a negative correlation with clay minerals content.Excellent marine shales in the Upper Permian sequence of inner-platform sag in northeastern Sichuan Basin chiefly composed of silicesous mineral(quartz) and calcareous mineral,but contained almost no clay.The siliceous minerals and calcareous minerals in excellent marine shale were organic origin because that they were developed originally from the siliceous bioclastic of hydrocarbon generation orga-nism experienced diagenesis.Almost ultramicroscopic particles of the siliceous bioclastic contained orga-nic carbon and sulfur,and there were a positive correlation between the contents of carbon and sulfur.Inner platform sag sedimentary environment was favorable for deposition of shale with high TOC and silices mineral but low clay contents.

RESEARCH OF A DOUBTFUL TUBE FOSSIL FROM THE LOWER CAMBRIAN SOURCE ROCKS IN SONGLIN, ZUNYI, GUIZHOU

Zhang Wentao, Tenger, Qin Jianzhong, Zhang Qingzhen, Xie Xiaomin, Bian Lizeng

2010, 32(2): 171-174. doi: 10.11781/sysydz201002171

Abstract(1351) PDF-CN(1260)

Abstract:
A new type of silicic tube fossil is discovered from the lower part of Niutitang Formation(Lower Cambrian) in Songlin,Guizhou Province.The founded tube fossils are characterized by porous tube wall,and are only 470 nm in diameter.They are regarded as a new species,and might in some cases reflect characters of spongia.The development of source rocks is closely related to ancient biology activities.The doubtful tube fossils may indict many life activities in ancient water,which is helpful to explain why the silicalite has a high TOC.The silicalite is thought to deposit in deep-shelf environment influenced by hot water,which is beneficial for the formation of high quality source rocks.

CHARACTERISTICS OF BIOMARKER COMPOUNDS IN THE MIDDLE JURASSIC CARBONATE SEQUENCE OF THE BUQU FORMATION AND THEIR IMPLICATION IN THE QIANGTANG BASIN, THE NORTHERN TIBET

Li Zhongxiong, He Jianglin, Du Baiwei, Wang Zhengjiang

2010, 32(2): 175-180. doi: 10.11781/sysydz201002175

Abstract(2366) PDF-CN(946)

Abstract:
Characteristics of biomarker compounds from Middle Jurassic marine carbonate sequence in Well QZ2 are reported for the first time.Abundant biomarkers,including n-alkanes,isoprenoid,steranes and terpanes,have been detected by GC-MS in this stratum.Chromatogram figure shows that n-alkanes contain nC₁₂-nC₃₅ with a relatively wide range,nC₁₇,nC₂₀,nC₁₈,nC₁₅ or nC₁₆ can be as the highest peaks.Examination of the relative abundance also shows an absolute dominance of low carbon molecular components in the n-alkane.OEP ratio ranges from 0.37～1.14 with the average of 0.89.This data shows little dominance of odd-even carbon number in the alkane.Pr/Ph ratio ranges from 0.56 to 1.03 with an average of 0.75,which shows an obvious dominance of phytane in isoprenoids.The relative abundance is pentacyclic triterpane>tricyclic terpane>quartcyclic terpane.Steranes also contain a little gammacerane.Sterpane ∑C₂₇/∑C₂₉ ratio ranges from 0.67 to 1.22 and this data fluctuates in the vertical carbonate sequence.Sterpane ∑(C₂₇+C₂₈)>∑C₂₉ and this parameter also indicates that the organic matter is originate from algae and the contribution from terrestrial plant sources cannot be confirmed yet.Different kinds of parameters indicate that the organic matter of the whole carbonate sequence is in the mature stage.Full sedimentary environment of carbonate sequence is in the reduction condition and sea water salinity is normal.

THE DISTRIBUTED CHARACTERISITIC OF MIDDLE JURASSIC BUQU FORMATION CARBONATE SOURCE ROCK IN MIDWEST AREA OF NORTH QIANGTANG DEPRESSION

Chen Ming, Wang Jian, Tan Fuwen, Du Baiwei

2010, 32(2): 181-185. doi: 10.11781/sysydz201002181

Abstract(1412) PDF-CN(824)

Abstract:
According to the typical section measured and the auxiliary correlation section observation,as well as massive system samples data analysis,we thought that the Middle Jurassic Buqu Formation in the North Qiangtang Depression is mainly composed of a set of thickness huge semi-restricted lagoon facies micrite,marl and the tidal flat grain limestone,the gypsolith,the mudstone and so on.The carbonate source rocks mainly is the lagoon facies dark color micrite and the marl.The source bed in on longitudinal mainly delivers its lower segment and the upside;on crosswise from the depression interior to the depression edge,source rock thickness attenuates gradually and the organic carbon content variations characteristic.The source bed distribution characteristic of the Buqu Formation is controlled by the sedimentary facies and the sea level fluctuation change obviously.Its distributed characteristic have the vital significance to appraise uncooked oil prospect and seek the main uncooked oil depression.

RESEARCH ON GEOCHEMICAL EXPLORATION TECHNIQUE FOR NATURAL GAS IN THE NORTHEASTERN SICHUAN AREA

Sun Changqing, Chen Yinjie, Rong Fazhun, Ren Chun

2010, 32(2): 186-191. doi: 10.11781/sysydz201002186

Abstract(1434) PDF-CN(822)

Abstract:
The hydrocarbon gases-oriented geochemical exploration technique has the advantage of quickness,effectiveness and low cost,and may play active roles in natural gas exploration.Some experiments and researches,including experiments for sample-collecting methods,researches on the effectiveness and the repeatability of the geochemical indicators,have been made in the Puguang Gasfield and Yuanba Block in the Northeastern Sichuan Experimental Area in order to select the effective geochemical indicators suitable for the surface and geological conditions of the study area.As the result,the geochemical indicators of headspace hydrocarbon,acid-extraction hydrocarbon and heat-released hydrocarbon of the common surface residual soils caused by the weathering of the red Jurassic mudstones have been selected.The results show that when the high concentration values,the accumulation factor,and the dryness degree(C₁/C₂+) of these hydrocarbons are used to determine the main anomaly,they can quickly identify the favorable accumulation area for natural gases,and have already achieved good prediction effects in Yuanba Block.

EVALUATION ON UPPER TRIASSIC HYDROCARBON SOURCE ROCKS OF WESTERN SICHUAN DEPRESSION, SICHUAN BASIN

Wang Dongyan, Zeng Huashen, Wang Jinyi

2010, 32(2): 192-195. doi: 10.11781/sysydz201002192

Abstract(1316) PDF-CN(881)

Abstract:
Based on detailed pre-treatment works of hydrocarbon rocks in the Upper Triassic of Western Sichuan Depression of Sichuan Basin,organic geochemistry features are analyzed.Hydrocarbon source rocks have high organic matter abundance in total.Organic matter is mainly humosapropelic,and is during the mature and post mature evolutionary phase.Studies have shown that expulsion intension can ultimately materialize the quality of source rocks.In this paper,based on expulsion intension,the study area has been divided into 3 categories.Type Ⅰ locates in Shifang,Pengzhou,Wenjiang,Dayi and Dujiangyan,covering about 5 412 km².The hydrocarbon source rock thickness is about 1 000-1 650 m,and the expulsion intension is about(100-270)×10⁸m³/km².Type Ⅱ locates in Mianyang,Mianzhu,Zhongjiang and Chengdu,covering about 6 281 km².The hydrocarbon source rock thickness is about 700-1 500 m,and the expulsion intension is about(50-100)×10⁸m³/km².Type Ⅲ locates in Anxian,Fenggu and Longquanyi,covering about 4 895 km².The hydrocarbon source rock thickness is about 400-700 m,and the expulsion intension is about(10-50)×10⁸m³/km².

THE CALCULATION METHOD FOR THE CONTRIBUTION RATE OF THE BIODEGRADED MIXED-SOURCE OILS

Zhao Chunhua, Wang Jibao, Zhu Yangming

2010, 32(2): 196-200. doi: 10.11781/sysydz201002196

Abstract(1569) PDF-CN(861)

Abstract:
The mathematical models of biodegraded mixed-source oils' biomarkers change along with the mixed proportion,and the calculation method for the contribution rate of oil sources were established by mathematical demonstration and artificial oil-mixing experiment,and in addition,the effect of biodegradation on the mixed proportion is illustrated.The research indicated: when the biomarkers content is used as a parameter,if we use normal crude oils or less biodegraded crude oils as end-member oils,instead of the biodegraded mixed-source oils,we will overestimate the contribution rate of the high biomarkers content crude oil,otherwise,we will underestimate the contribution rate of the high biomarkers content crude oil,so we should use considerable extent of biodegraded oils to calculate.When the biomarkers ratio is used as a parameter,as to biodegraded mixed-source oils in the same degree,biodegradation will have no effect on the mixed proportion,and we can use normal crude oils as end-member oils.However,the situation will appear more complicated if we use normal crude oils rather than biodegraded end-member oils in varying degrees,the contribution rate of crude oils of the high biomarkers ratio will be overestimated or underestimated.In this case,we should use the corresponding degree of biodegraded crude oils as end-member oils to calculate.

THE APPLICATION OF THE QUANTITATIVE GRAIN FLUORESCENCE ANALYSIS TO STUDY THE RESERVOIR IN THE TAHE OILFIELD

Jiang Hong, Shi Weijun, Qin Jianzhong, Rao Dan, Luo Yueming, Xi Binbin

2010, 32(2): 201-204. doi: 10.11781/sysydz201002201

Abstract(1406) PDF-CN(839)

Abstract:
In order to analyze the property of hydrocarbon adsorption in reservoir,oil fluid inclusions are often investigated by fluorescent microscope and micro spectrum.However,there are some problems in the testing for the uncertainty of fluid inclusions in reservoir due to the characteristics of lithology,oil-and-gas injection rate and sedimentary condition.Not only the samples from Well S87 and S102 but also the 8 samples from Well S110 are analyzed by the QGF-E and QGF before the quantitative grain fluorescence analysis of the reservoirs in Tahe Oil Field.The result shows that there is an interface between oil and water layers in the Carboniferous Bachu Formation and the Lower Silurian Kepintage Formation.The Ordovician Yinshan Formation,the Yijianfang Formation and the Lianglitage Formation are all oil layer,and the result agrees well with the logging data.This is important for the modeling of oil-and-gas formation in the Tahe area.

2010 Vol. 32, No. 2

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