石油实验地质

Contents Vol.32,No.1 Feb.,2010

2010, 32(1)

Abstract(1012) PDF-CN(942)

Abstract:

TIME-SPATIAL DEVELOPING FEATURES OF CO-EXISTED INHERITED AND NEOGENIC STRUCTURES——A TANGENT IN POINT OF BASIN-OROGENY COUPLING THEORY GUIDING PETROLEUM EXPLORATION

Wu Genyao, Ma Li, Li Qun, Liang Xing, Chen Fanghong, Liang Jiangping, Zhu Defeng, Yang Jianguo

2010, 32(1): 1-9. doi: 10.11781/sysydz201001001

Abstract(1360) PDF-CN(1026)

Abstract:
The study on time-spatial developing features of co-existed inherited and neogenic structures might be a tangent in point of basin-orogeny coupling theory guiding oil-gas exploration,which was expounded from the three aspects: super-continental cycles,basin-making dynamics and petroliferous structural belts.The study emphasized to "get to the root" and "trace to the source",namely,to analyze the neogenic structure as well as influence of the basemental(or pre-existed) ones in each tectonic phase,so that the basin research was deepened into petroliferous structural belts in the basin,and the basin kenematics was made further advances on the basin dynamics.Based on two tendencies of neogenic structural evolution,three main target areas was pointed out for marine original oil-gas exploration,which marked the basin-orogeny coupling theory taking an important step to guide the(marine original) oil-gas exploration.To take the neogenic structural evolution as the key link,to synthesize the studies on source,migration,concentration and accumulation,and to draw lessons from recently new fruits of petroleum geology,the basin-orogeny coupling theory would be developed further and become one of the bringing forth new ideas for oil-gas exploration,specially for marine original oil-gas exploration.

HYDROCARBON PRESERVATION CONDITIONS IN LONGMEN MOUNTAIN, WEST SICHUAN BASIN

Luo Xiaoquan, Li Shubing, He Xiubin, Li Zhikui

2010, 32(1): 10-14. doi: 10.11781/sysydz201001010

Abstract(1282) PDF-CN(1056)

Abstract:
Based on researches of hydrocarbon in thrust nappe belt at home and abroad,from aspects such as tectonic deformation,cover,and relationship between hydrocarbon and preservation,studies of oil-and-gas preservation have been carried out in the Longmen Mountain thrust nappe belt.Main controlling factors of accumulation have been summarized.On the basis of zone evaluation,it has been pointed out that,the east to the Jiangyou-Dujiangyan fracture is favorable for hydrocarbon preservation and accumulation.Tectonic deformation preservation model of the Longmen Mountain thrust nappe belt has been set up.Evaluation methods and index adapted to the study area have been concluded.The Shanbantan and Yazihe anticlines have been predicted as favorable exploration targets.

RESERVOIR CHARACTERISTICS AND DEVELOPMENT SUGGESTION OF CHALKY LIMESTONE IN THE ZAGROS BASIN, IRAN

Xu Dejun, Zhang Wencai, Du Xiujuan, Li Yanjun, Su Yu

2010, 32(1): 15-18. doi: 10.11781/sysydz201001015

Abstract(1471) PDF-CN(1162)

Abstract:
Reservoirs of Sarvak Formation in the Y Oilfield of the Zagros Basin,Iran are rich rudist-bearing chalky limestone.Reservoir spaces are mainly porosities and vuggs,with few fractures.The reservoirs were deposited in slope of marginal neritic carbonate platform and marginal reefs.The heterogeneity in intralayer is weak while strong in interlayer.In charge of sedimentary environment and diagenesis,high-quality reservoirs developed in slope of marginal neritic carbonate platform and marginal reefs which with slightly chalk-diagenesis.Sarvak Formation is a multi-layer stacked reservoir with weak edge water and a tilted oil-water contact.Development must depend on reservoir characteristics and reservoir types.

THE FORMATION MECHANISMS AND CHARACTERISTICS OF THIN-LAYER MUDSTONE CAPROCK AND ITS RELATIONSHIP WITH HYDROCARBON ACCUMULATION IN THE TERRESTRIAL BASIN——AN EXAMPLE OF THIN-LAYER MUDSTONE CAPROCK IN THE SOUTH-CENTRAL LIAODONG BAY

Li Huiyong, Xu Changgui, Liu Tinghai, Deng Jinhui, Liu Mingling, Yao Changhua

2010, 32(1): 19-23. doi: 10.11781/sysydz201001019

Abstract(1436) PDF-CN(1002)

Abstract:
A series of thin-layer mudstone caprock reservoirs have been found in the last two years in the south-central Liaodong Bay,Bohai offshore area.This paper comprehensively summarizes the formation mechanisms and characteristics of thin-layer mudstone caprock,and then analyzes the relationship between thin-layer mudstone caprock and hydrocarbon accumulation.Through systemic research,the following important conclusions are obtained.Under favorable trap shape condition,thin-layer mudstone caprocks have good sealing effect.Mudstone quality has obvious effect on reservoir height.But mudstone thickness has no relation with reservoir height.Reservoir height raises great along with the better trap shape under the similar sealing condition.The result of this research can broaden exploration thought for the future: In reservoir development area,large and medium oil and gas fields can be found as long as traps are in good condition.

NEW COGNITION ON GENETIC MODEL OF JURASSIC SUBTLE RESERVOIR IN THE MXZ AREA OF THE HINTERLAND OF THE JUNGGAR BASIN

Li Qun, He Jinhai, Wang Baocai

2010, 32(1): 24-27. doi: 10.11781/sysydz201001024

Abstract(1247) PDF-CN(928)

Abstract:
To establish the formation model of subtle reservoir in the MXZ area of the central Junggar Basin,after sequential analysis on core,well drilling/logging and seismic data,this paper integrated two sets of oil layers into the low-stand system tract of Sequence 1.Through follow-up investigation and research on this sequence boundary,it was detected that,in the vicinity of the slope break belt,tract sedimentary strata thickened with obvious foreset sand in the low-stand system tract,so oblique strata should be compared;in gentle terrains without the slope break,flat strata should be compared.Sequentially,formation mechanism of subtle trap is ascertained,and it is concluded that the change of base level is the main factor that controls the formation of subtle trap in the MXZ area.Based on that conclusion and the analysis on sand distribution,new formation model of subtle reservoir is summarized,i.e.,the plane is lobate,transverse section is lentoid,and longitudinal section is sphenoid with gentle slope.

THE COMPARISON RESEARCH OF HYDROCARBON GEOLOGIC CONDITIONS IN THE AUSTRALIAN NORTH WEST SHELF, NIGER DELTA BASIN AND THE CAMPOS BASIN

Xu Xiaoming, Yu Shui, Luo Zongqiang, Kang Hongquan, Nie Zhimeng

2010, 32(1): 28-34. doi: 10.11781/sysydz201001028

Abstract(1748) PDF-CN(1550)

Abstract:
There are not only similarities but also unique characteristics among Campos Basin,Niger Delta Basin and Australian North West Shelf(NWS).The major unique characteristics are in three areas: 1.The oil and gas of the NWS rich in the rifting sequence,but Campos Basin and Niger Delta Basin rich in the drifting sequence.Its reason is the NWS has a few periods rifting or the others have one period rifting.2.Because the characteristics of hydrocarbon source rocks are different,the distribution characteristics of oil and gas are different in different basins.The NWS is abundant in gas and less in oil,otherwise the others abundant in oil and less in gas.3.The major controlling factors for distribution of oil and gas are different in the three basins,the factors of Campos Basin are the turbidity sands and salt movements,the factor of Niger Delta Basin is contemporaneous faults,the factor of the NWS is structure.

SEDIMENTARY CHARACTERISTICS AND OIL-AND-GAS DISTRIBUTION IN MEMBER 4 OF QUANTOU FORMATION, ANDA AREA, SONGLIAO BASIN

Zhao Bo, Feng Zihui, Liang Jiangping

2010, 32(1): 35-40. doi: 10.11781/sysydz201001035

Abstract(1395) PDF-CN(1051)

Abstract:
Researches of core samples,main facies markers and well logging facies have indicated that,2 main subfacies(delta plain and delta front) generate in the Member 4 of Quantou Formation,Anda area,the Songliao Basin.6 microfacies are further classified: distributary channels,interdistributary bays,crevasse splays,subaqueous distributary channels,subaqueous interdistributary bays and sheet sand.Using high-resolution stratigraphic theory and research methods,the Member 4 of Quantou Formation in Anda area is divided into 1 long-term sequence cycle,6 medium-term sequence cycles and 10 short-term sequence cycles.Delta plain subfacies develop in sequence K₁q₄-sq₁ and K₁q₄-sq₂,while delta front subfacies develop in sequence K₁q₄-sq₃.According to data from 7 wells such as D25 and DS401,main reservoirs in the study area are distributary channels and subaqueous distributary channels facies.Lake facies mud in the Member 1 of Qingshankou Formation works as good source and cap rocks.

RESERVOIR CHARACTERISTICS AND COMPREHENSIVE EVALUATION OF NANBAXIAN OILFIELD IN NORTH MARGIN OF THE QAIDAM BASIN

Jiang Fujie, Wu Li, Li Xia, Ma Zhongzhen

2010, 32(1): 41-45. doi: 10.11781/sysydz201001041

Abstract(1445) PDF-CN(995)

Abstract:
Reservoir comprehensive evaluation has great meaning for residual oil development in Nanba-xian Oilfield,locating in north margin of the Qaidam Basin,which has been developed for more than 50 years.Feldspar sandstone and debris-arkosic sandstone are the main rock types of the Tertiary reservoir sandstone with high matrix and cement content in detritus in Nanbaxian Oilfield.Well sorted original pore and secondary dissolved pore are the main pore types.Reservoir diagenesis is relatively weak.The separate out of carbonate is the main factor for original pore decrease.Intergranular porosity is the main pore type,which is connected by bend sheet-sheet shape pore throat.The reservoir has middle porosity-middle permeability and well connectivity.Diagenetic facies is early B period,which is favorable for the development of secondary dissolved pores.Comprehensive reservoir analysis by cluster analysis method showed that reservoir type in Nanbaxian Oilfield was mainly type Ⅲ,the next was typeⅡ,while typeⅠ was relatively small.

HYDROTHERMAL FLUID ACTIVITIES AND MAIN CONTROLLING FACTORS OF DEEP RESERVOIR DEVELOPMENTIN THE LOWER PALEOZOIC OF THE TAHE OILFIELD-TAKING WELLS S88 AND TS1 AS EXAMPLES

Li Kaikai, Cai Chunfang, Cai Liulu, Jiang Lei

2010, 32(1): 46-51. doi: 10.11781/sysydz201001046

Abstract(1247) PDF-CN(963)

Abstract:
⁸⁷Sr/⁸⁶Sr,δ³⁴S and fluid inclusions were analyzed on the fracture fillings of thick dolomites in Wells S88 and TS1 in the Tahe Oilfield.The results indicate that the deep hydrothermal fluid has a significant effect on the dolomite reservoirs of the Penglaiba Formation from Well S88 and the Qiulitage Formation from Well TS1.The hydrothermal fluid is characterized by high temperatures and ⁸⁷Sr enrichment,and may have up-migrated with H₂S and CO₂,which resulted likely from thermochemical sulfate reduction(TSR) of hydrocarbons.The migration of acidic hydrothermal fluid resulted in dissolution of carbonates and generation of abundant secondary vugs and micropores in Wells S88 and TS1,thereby,which improves the quality of reservoir properties.Also,faults and micro-fractures may have served as migration pathways for the hydrothermal fluid in Wells S88 and TS1.The degree to which the hydrothermal fluid influenced on quality of Penglaiba Formation in Well S88 was mostly controlled by lithology and cracks.The reservoir of dolomite strata is better than limestone strata,and fracture zone is prone to form better reservoir.In Lower Qiulitage Formation of Well TS1,TSR was enhanced by the occurrence of gypsum/anhydrite in dolomite strata,and thus might be one of main controlling factors in the development of deep favorable reservoirs.

CAUSES AND SIGNIFICANCE OF ABNORMAL THERMAL EVOLUTION OF ORGANIC MATTERS IN CHANGYANG AREA, HUBEI PROVINCE

Liu Guangxiang, Luo Kaiping, Peng Jinning, Deng Mo, Guan Honglin

2010, 32(1): 52-57. doi: 10.11781/sysydz201001052

Abstract(1954) PDF-CN(942)

Abstract:
Studies of vitrinite reflectance and illite crystallinity from Upper Sinian to Lower Triassic in Chang-yang area of Hubei Province have indicated that,there are 2 abnormal zones of equivalent vitrinite reflectance and illite crystallinity between Permian-top of Silurian and bottom of Silurian-top of Lower Cambrian.The upper abnormal zone is formed by thermal effects of advection hot liquid flowing along D₂y,S₃sh sandstone reservoir as well as D₂y/S₃sh,C₁y/D unconformity surface.The lower abnormal zone is formed by thermal convection of hot liquid in-C₁s-O reservoir.Hydrocarbon generation in P and O₃w-S₁ln should stop at the end of Middle Triassic;however,due to thermal effect of hot liquid during the Yanshanian stage,it continues to the end of Jurassic,hence favorable for petroleum accumulation.

HYDROCARBON GENERATION HISTORY OF UPPER PALEOZOIC SOURCE ROCKS OF JIYANG AND LINQING DEPRESSIONS, BOHAI BAY BASIN

Zhu Jianhui, Hu Zongquan, Lü Jianhong, Wang Baohua, Zhou Xinke

2010, 32(1): 58-63. doi: 10.11781/sysydz201001058

Abstract(1443) PDF-CN(908)

Abstract:
The TSM basin model software based on analysis of basin superposition and reformation has illustrated hydrocarbon evolution of different source rocks of Upper Paleozoic in the Bohai Bay Basin.The Upper Paleozoic source rocks in the Jiyang and Linqing Depressions have reached hydrocarbon threshold before the end of Middle Triassic and are regionally stagnated by the Indosinian movement.Differences of Meso-Cenozoic basin evolution have resulted in differences of ‘secondary hydrocarbon generation' of the Upper Paleozoic source rocks in different sags,hence influencing evaluation of hydrocarbon generation potential of the Upper Paleozoic source rocks.Studies have indicated that,the Upper Paleozoic source rocks in the Jiyang Depression have experienced 2 processes of ‘secondary hydrocarbon generation' during Yanshan and early Himalayan epoch,respectively.During the early Himalayan epoch,hydrocarbon generation amount has reached the maximum and the center of hydrocarbon generation migrates at any time.As to the Dongpu Sag,‘secondary hydrocarbon generation' starts in the early Himalayan epoch and the average hydrocarbon generation intensity is high.

DINOFLAGELLATES AS POTENTIAL PRECURSORS OF 24-NORCHOLESTANES

Wang Guangli, Li Shu

2010, 32(1): 64-66. doi: 10.11781/sysydz201001064

Abstract(1252) PDF-CN(914)

Abstract:
Occurring widely in oils and ancient sediments,24-norcholestanes are useful to oil-source correlation and petroleum age evaluation.24-norcholestanes mainly derive from diatoms;however,they are also identified unambiguously from dinoflagellates.Abundant 24-norcholestanes occur in oils and source rocks of the Shahejie Formation,but no diatom fossils have been distinguished from the Shahejie Formation.Thus,other potential precursors might be responsible for these 24-norcholestanes.A correlative relationship between 24-norcholestanes and dinocysts or triaromatic dinosteroids has been observed,revealing that dinoflagellates should be potential precursors of 24-norcholestanes.It seems that 24-norcholestanes come from dinoflagellates and diatoms,respectively,for different basins.Notwithstanding the fact that 24-norsterols have low concentrations in contemporary dinoflagella test,it is concluded that dinoflagellates are key contributors to 24-norcholestanes within subtropical lacustrine sediments of the Eocene-Oligocene Jiyang Depression.

COMPOSITION ANALYSES OF INDIVIDUAL HYDROCARBON INCLUSION

Rao Dan, Qin Jianzhong, Zhang Zhirong, Zhang Qu, Jiang Qigui

2010, 32(1): 67-70. doi: 10.11781/sysydz201001067

Abstract(1208) PDF-CN(915)

Abstract:
Researches of compositions of individual hydrocarbon inclusion have attracted much attention in the world.Connecting laser micropyrolysis system to gas chromatography-mass spectrometry system by means of sample input and enrichment system,analysis instrument for compositions of individual inclusion has been made.Individual inclusion is cracked with laser.Hydrocarbon is concentrated and gas chromatography-mass spectrometry studies are carried out.Analyses of C₆₊ in individual inclusion have come true for the first time.Inclusions of different stages are studied respectively,providing significant ways for studies of petroleum accumulation and evolution history in marine facies superimposed basins.

THE STUDY ON ADSORPTION AND DE-ADSORPTION BEHAVIOR OF SOME BIOMARKERS ON DIFFERENT TYPE-Y CHINESE MOLECULAR SIEVES

Wang Huitong, Wei Caiyun, Zhang Shuichang, Zhang Dajiang, Yang Aidi

2010, 32(1): 71-75. doi: 10.11781/sysydz201001071

Abstract(1337) PDF-CN(815)

Abstract:
This paper investigates the column chromatographic adsorption and de-adsorption behavior of different type-Y Chinese molecular sieves on some biomarkers(e.g.steranes,hopanes).USY molecular sieve and DNSY molecular sieve and DASY molecular sieve to the steranes and hopanes have the same adsorption and de-adsorption,which can't be used for the separation of steranes and hopanes.CDY molecular sieve to the different configurations of steranes,hopanes has the different adsorption,but to the C₂₉ hopanes and 5α,14α,17α-20R C₂₉ steranes,CDY sieve has similarity adsorptive capability;The MOY molecular sieve and the REUSY molecular sieve have very strong adsorption to hopanes,but weak to the steranes,the gammarane,β-carrotane adsorption,which can enrich the steranes,the gammarane and β-carrotanes;The NaY molecular sieve has the different adsorption behaviors to the different configurations of steranes,hopanes,gammarane and β-carrotane,which is maybe the best type-Y Chinese molecular sieve to separate steranes,hopanes,gammarane and β-carrotane.

OILFIELD WATER ION CHROMATOGRAPHIC ANALYSIS TECHNIQUE AND ITS APPLICATION IN OILFIELD DEVELOPMENT

Li Wu, Ning Lirong, Lu Li

2010, 32(1): 76-82. doi: 10.11781/sysydz201001076

Abstract(1133) PDF-CN(945)

Abstract:
A research on the oilfield water ion chromatographic analysis technique has been conducted in order to overcome the problems encountered in constant ion analysis of oilfield water by conventional chemical analysis method.The new technique has been applied into the oilfield water analysis in the Anpeng Oilfield of the Biyang Sag,and has provided liable analysis data for oilfield development.The results indicate that the reservoir condition of the Anpeng Oilfield is poor,the oilfield water is influenced significantly by the reservoir features,and the erosion effect of the injection water to the reservoir is strong.The characteristics of the oilfield water in the shallow-middle and the deeper parts of the Anpeng Oilfield in the Biyang Sag are obviously different,with the greater influence of the injection water in the deeper part.The closed area composed by the Bi 185-An 2108-An 65-An 27-An2029-Bi185 is a unified reservoir with good performance for oil and gas accumulation.So oilfield water ion chromatographic analysis technique has important significance in the research of the continuity of the reservoirs and the effect of injection development.

STUDY ON CONCEPTUAL MODEL OF OIL AND WATER DISTRIBUTION IN WELL GROUP TK461 OF ORDOVICIAN RESERVOIR IN TAHE OILFIELD, TARIM BASIN, CHINA

Yang Min, Lu Zhengyuan, Dou Zhilin, Lu Xinbian, Li Feng

2010, 32(1): 83-86. doi: 10.11781/sysydz201001083

Abstract(1269) PDF-CN(833)

Abstract:
The reservoir space of the Ordovician dense carbonate in Tahe Oilfield,the Tarim Basin,is a complex system,mainly composed of one or several large pipeline-shaped cavities which were communicated by natural and acid-fracturing fractures.The development performance shows that there are a number of different invading pathways of edge or/and bottom water bodies in Well Group TK461,which are different from the common water invading process from lower to higher position gradually.After water injection from Well TK461 in the lower-position,water production in Well TK432 decreased and Well TK435 produces no water but pure oil.The conceptual model of oil and water distribution has been established in Well Group TK461 according to the relationship between water and oil during the development.The model reveals that water injection from a well in the lower position may increase the energy of remaining oil in the wells in the upper position wells-from the reverse direction of the original invading pathway,resulting in water containing drop and control water coning in wells in the upper position.

THE EFFECT OF STRUCTURAL FACTOR ON APPARENT FREQUENCY ON THE SEISMIC PROFILE-AN EXAMPLE FROM WUERXUN SAG OF THE HAILAER BASIN

Wang Xuefeng, Li Zhongquan, Meng Qi'an, Zhu Defeng, Hang Wenyan, Chen Junliang

2010, 32(1): 87-92. doi: 10.11781/sysydz201001087

Abstract(1360) PDF-CN(1143)

Abstract:
Apparent frequency is an important information for seismic data interpretation.The analysis of the relationships between apparent frequency in the seismic profile and structural evolution,the sediment controlled by structure,denudation caused by tectonic uplift,violent degree of tectonic action in different times in the Wuerxun Sag of the Hailaer Basin,show that structural factor is one of the important factors that influence the change of apparent frequency on seismic profile.It affects the apparent frequency by controlling and reforming the sedimentary stratigraphic structure.The lateral abrupt change of apparent frequency on the seismic profile reflects faults and vertical abrupt change reflects tectonic unconformities,especially parallel unconformity based on some theories.

MAIN CONTROLS FOR OIL DISPLACEMENT EFFICIENCY BY THE MICRO-MODEL WATER FLOODING EXPERIMENT IN ULTRA-LOW PERMEABILITY SANDSTONE RESERVOIR

Wang Ruifei, Sun Wei

2010, 32(1): 93-97. doi: 10.11781/sysydz201001093

Abstract(1372) PDF-CN(1229)

Abstract:
By the sandstone micro-model water flooding experiment of ultra-low permeability sandstone reservoir in the Ordos Basin,the controlling factors for oil displacement efficiency are studied in this paper.It's discovered that the wettability is different,so is the displacement mechanism.There are displacement and denudation mechanism in water wet reservoir,while there are displacement and flow mechanism in oil wet reservoir.There are many factors that affect the oil displacement efficiency such as the property,the pore structure,the injection volume,the injection rate,the wettability,and so on.The water drive development is sensitive to the injection speed in ultra-low permeability sandstone reservoir.For different reservoir,appropriate injection speed should be adopted in order to improve the effect of development.

STUDY ON THE INFLUENCE OF WATER VAPOR TO THE MEASUREMENT OF TRACE HYDROGEN IN NATURAL GAS

Meng Qingqiang, Jin Zhijun, Liu Wenhui, Tao Cheng, Sun Dongsheng

2010, 32(1): 98-100. doi: 10.11781/sysydz201001098

Abstract(1328) PDF-CN(865)

Abstract:
The water vapor can affect the measuring result of the hydrogen isotopic composition which was attained by improved measuring method for trace hydrogen.It was proved by experiments that standard deviation was 17.15 for 6 measured results of trace hydrogen,whose content was 0.1% before the chromatographic column was heated to remove the water vapor,it was suggested that although the measured result had an average which was similar to the generally accepted value for the employed hydrogen in the experiment,the measured result had a wide distribution range and each single measured result had a relatively weak reliability.After the chromatographic column was heated to remove the water vapor,the 6 measured results for the same sample had a standard deviation of 4.56,which suggested that the measured results were relatively concentric.It was safely to conclude that heating the chromatographic column can significantly improve the reliability of the measured result.What's more,the average value could not be used as the real isotopic composition for lower content hydrogen gas,the measured result should be assessed taking the standard deviation value into account.

2010 Vol. 32, No. 1

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