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2009 Vol. 31, No. 4

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 Contents Vol.31,No.4 Aug.,2009
2009, 31(4)
Abstract(972) PDF-CN(710)
Abstract:
TIME-SPATIAL DEVELOPING FEATURES OF CO-EXISTED INHERITED AND NEOGENIC STRUCTURES AND THEIR GUIDENCE TO MARINE ORIGIN OIL-GAS EXPLORATION IN THE TARIM CRATON
Wu Genyao, Yang Haijun, Wang Buqing, Li Yuejun, Zheng Duoming, Zhao Yan, Liu Yalei
2009, 31(4): 315-323. doi: 10.11781/sysydz200904315
Abstract(1374) PDF-CN(1040)
Abstract:
The Tarim Craton was created in the Jinningian orogeny by amalgamation of the North Tarim and South Tarim Blocks,with the basement structures being varied in its northern,middle and southern parts.The paper discussed,in succession of tectonic cycles,the neogenic structures in each part,including the ages,orientations and active modes.Their mechanisms were explorated in the light of coupled evolution with the surrounding orogenies.The guidence to marine origin oil-gas exploration was analysed,which revealed the NW-striking neogenic structure in central Tarim controlling the lithologic pool,and the fractures with varied orientation in northern Tarim playing different roles in oil-gas migration.Based on a comparative study with the Yangtze Craton,three distinctions could be summed up.1)The marine oil-gas in the Tarim Craton was mainly accumulated in Late Hercynian-Indosinian.The key was to understand the laws of adjustment or later secondary accumulation of the ancient pool in the Himalayan cycle since the Yanshanian movement being relatively gentle.2)In each tectonic epoch of marine deposition,some neogenic structures with varied orientations might be mobile synchronously,and the Paleozoic neogenic structures might react in the Cenozoic.It was complicated fault systems and their repeated activities that resulted in oil-gas accumulation,later adjustment or secondary accumulation,and creating a large scale multiple oil-gas accumulation play.3)The Paleogene gypsum-salt layer became an interlayer-gliding fault.The Cenozoic thrusts,stretching downwards,converged onto the layer so that the Paleozoic marine deposits and oil-gas pools relatively well reserved.The deformation mode of the Paleozoic was faulting,with folding being constrained by the faults,so the petroliferous structural belts should be fault ones.
PLAY TYPES AND DISTRIBUTION FEATURES OF COEXISTENCE OF ORGANIC AND ABIOGENTIC HYDROCARBON IN THE CHANGLING FUALTED DEPRESSION OF SONGLIAO BASIN
Zhou Liqing, Lei Yixin, Wang Hongyan
2009, 31(4): 324-328. doi: 10.11781/sysydz200904324
Abstract(1433) PDF-CN(955)
Abstract:
The Changling faulted depression,a deep large depression developed in the intersection area of two systems of lithosphere faults,with abundant lacustrine and limnetic facies source rocks and sets of favorable plays,is an area with rich organic based hydrocarbon.It is also an rich abiogentic area with sets of abiogentic based natural gas plays,due to the most active volcanism and most abundant supply of deep abiogentic based gas.The above factors cause the coexistence of organic and abiogentic plays.Abiogentic and organic natural gas reservoirs have similar fluid migration pathways,such as fractures,unconformity surfaces,glutenite and volcanic bodies of different grades,as well as similar accumulation zones.Therefore,in the course of their common migration and accumulation,two fluids from different sources are mutually accelerated and affected.Abiogentic based fluid greatly improves the migration and accumulation pathways,increases migration and accumulation efficiency and provides migration force,which promotes deep hydrocarbon accumulation and increases deep hydrocarbon production and abundance.Apparent difference in supply volumes of abiogentic and organic matter causes the fact that the southeastern part is dominant with organic based plays,northeastern and southwestern part with abiogentic and organic combination,and northern and northwestern with abiogentic plays.Therefore,targeted exploration should be carried out in different types of zones.
VARIATION CHARACTERISTICS OF THE FLUID FEATURES AND ITS SIGNIFICANCE IN CAINAN OILFIELD OF THE JUNGGAR BASIN
Zhu Yushuang, Wang Xiaojun, Li Li, Shao Fei, Liu Yuan
2009, 31(4): 329-332. doi: 10.11781/sysydz200904329
Abstract(1478) PDF-CN(898)
Abstract:
In the migration process of oil and gas,the liquid's features may change because of oxidation-deterioration and thermal-deterioration and the change of the hydrodynamic force.So the information about the migration and preservation of oil and gas can be learned from the features of the liquids in formation.The results indicate that the fault can act as a passage for the liquid flowing,including oil and gas's migration and water's permeating.The flowing includes horizontal way along the formation.The permeating water obstructs the oil and gas migrating and disappearing.The Cainan North Fault and Cainan Fault in Jurassic Xishanyao Formation are not belong to one hydrodynamic force system,and the hydrodynamic force is weaker in the west of the Cainan North Fault than in other areas.The weaker hydrodynamic force is good for the hydrocarbon preservation.The Jurassic Badaowan Formation is one hydrodynamic force system in the west of the Cainan North Fault and the Cainan Fault,and the higher water salinity is good for the preservation of oil and gas.
ANALYSIS ON EXPLORATION POTENTIAL OF NATURAL GAS IN THE TURPAN-HAMI BASIN
Wang Jinsong, Wang Hua, Liang Shijun, Huang Weidong, Lü Xueju
2009, 31(4): 333-337. doi: 10.11781/sysydz200904333
Abstract(1478) PDF-CN(908)
Abstract:
The Turpan-Hami Basin locates in the northern basin group of the northern world famous Tethyan tectonic domain,which is a huge natural gas accumulation area.By comparison with petroleum geological condition of the Kuqa Depression in the Tarim Basin,it is believed that Turpan-Hami Basin possesses the geological condition of forming large-medium gas enrichment zone.According to gas distribution rules in foreland basin,it is thought that surrounding Turpan-Hami Basin,the three gas generation centers of Qiudong-Xiaocaohu,Shengbei,and Tuokexun in Turpan Depression,foreland thrust structural zone in the northern depression,slope br eak zone of foreland depression,and southern foreland uplift zone are favorable exploration direction for large-medium natural gas enrichment zone.It points out in this paper that lacustrine mudstone of Upper Permian and marine source rock of Carboniferous developed in the lower assemblage of Turpan-Hami Basin,are the possible large natural gas reservoir areas.It also preliminarily predicts that Turpan-Hami Basin is with rich CBM resources,and great exploration potential.
SINGLE WELL PRODUCTIVITY EVALUATION AND PREDICTION IN TIGHT CLASTIC RESERVOIR ROCK OF SHAXIMIAO FORMATION IN THE XINCHANG GAS FIELD,WEST SICHUAN
Shi Lei1, Kuang Jianchao, Zeng Jianyi, Liu Xin, Luo Xin, Cai Zuohua
2009, 31(4): 338-342. doi: 10.11781/sysydz200904338
Abstract(1530) PDF-CN(894)
Abstract:
The gas reservoirs of Jurassic Shaximiao Formation in the Xinchang Gas Field of West Sichuan are typical low-permeability tight clastic ones.Due to complex geological conditions and strongly heterogeneous characteristics in this area,it is difficult to predict single well productivity.By analyzing logging information and reservoir physical property,we first extract 11 parameters related to productivity,such as interval transit time,fracture aperture,fracture permeability,etc.Second,with correlation coefficient method,6 productivity controlling characteristic parameters are determined,including fracture aperture,fracture permeability,productivity coefficient,fracture porosity,fracture developing index and composite evaluation index.Third,we select 33 tested wells as known samples,construct productivity forecast equation with the theory of support vector machine,and then get the standard error of 0.066 1 and the mean absolute error of 0.018 2.In the end,with the equation,we predict 24 untested wells to complete single well productivity evaluation of Shaximiao Formation.
EVALUATION OF OIL AND GAS EXPLORATION DOMAINS IN BACHU-MAIGAITI AREA OF TARIM BASIN
Chen Qianglu, Zhou Lingfang, Zhang Genfa, You Donghua, Yang Shenbin, Liu Zhongbao, Cai Xiyao
2009, 31(4): 343-349. doi: 10.11781/sysydz200904343
Abstract(1714) PDF-CN(923)
Abstract:
Due to erosions from Caledonian to early Hercynian,Cambr ian-Middle-Late Ordovician carbonate platform in Bachu-Maigaiti area in the Tarim Basin is thinning northward with the shape of wedge.Different layers of carbonate rock have experienced stages of multi-phase karst effect.From Carboniferous to Permian,a number of sea-level cycles result in alternating layers of carbonate rocks and clastic rocks.Continuing uplifts lead to extensive erosions in Mesozoic.Faults in Bachu region move strongly in Himalayan and Maigaiti region adjust to slope southwards.The strata of Eugene-Pliocene overlap the ancient Bachu uplift of pre-Cenozoic.Taking into consideration of structural characteristics of multi-stage transformation and late-stage strong deformation in Bachu-Maigaiti area,it is pointed out in this paper that,relatively stable region in tectonic movements,long-term targets of hydrocarbon migration and effective sealing belts are the key factors for evaluations of oil and gas tectonic belts.Three tectonic belts with different exploration risks are divided.Four exploration domains are analyzed,including Carboniferous-Permian carbonate reservoir,Middle and Lower Ordovician karst weathering crust reservoir,Upper Ordovician platform edge facies belts and dolomite reservoir under salt in Cambrian.
THE PETROLEUM GEOLOGICAL CONDITION AND EXPLORATION PROSPECT ANALYSIS IN SINIAN,SICHUAN BASIN
Sun Wei, Liu Shugen, Han Keyou, Luo Zhili, Wang Guozhi, Xu Guosheng
2009, 31(4): 350-355. doi: 10.11781/sysydz200904350
Abstract(1430) PDF-CN(878)
Abstract:
The exploration degree of Sinian in the Sichuan Basin is low according to drilled information analysis.The drilled wells distribute on Leshan-Longnüsi paleo-uplift area and orogenic belt which is around the basin,but they almost failed.The source rock and caprock are good and have good geological conditions to form large gas field.The first oil generation period was in Caledonian and the oil was destroyed to bitumen in Hercynian.The second oil generation was in Indosinian.The Leshan-Longnvsi paleo-uplift was important to oil accumulation in this period.The oil was thermal cracked to gas by deep buried before Himalayan.It also formed abnormal high pressure and induced gas dissolving into water.During the uplift processes,due to the redistribution of gas and gas released from formation water,the gas field and gas-bearing areas were finally formed.Through analyzing the reservoir forming conditions of Sinian in the Sichuan Basin,this paper points out that the paleo-structures before Himalayan and Tianjingshan paleo-uplift in Caledonian should be the favorable exploration areas in the future.
TYPES AND FORMATION MECHANISM OF SUBTLE RESERVOIR IN THE CENTRAL JUNGGAR BASIN
Qin Du
2009, 31(4): 356-361. doi: 10.11781/sysydz200904356
Abstract(1509) PDF-CN(851)
Abstract:
Based on core,well drilling and seismic data,typical subtle reservoirs in the Central Junggar Basin are studied.Accumulation pattern of the reservoirs is set up according to their accumulation mechanism and hydrocarbon distribution.Due to the differences in trap characteristics,distribution,relationship among oil,gas and water,as well as formation mechanism,the subtle reservoirs are divided into 4 types:mudstone barrier,low-amplitude tectonic background reservoir,lithologic pinching and stratal pinch-outs.
THE GENESIS AND INFLUENTIAL FACTORS OF LAYERED RESERVOIR OF YELI-LIANGJIASHAN FORMATION IN THE JIYANG DEPRESSION OF THE BOHAI BAY BASIN
Xu Chunhua, Wang Yalin, Yang Guili
2009, 31(4): 362-365. doi: 10.11781/sysydz200904362
Abstract(1549) PDF-CN(805)
Abstract:
It was discovered that abundant isolated vug occurred in the Yeli-Liangjiashan Formation of Ordovician in the Jiyang Depression of the Bohai Bay Basin,which would turn into effective reservoir once connected by fractures.The article applied the seepage reflux mechanism developed by K.S.Deffeyes in 1965 to interpret the genesis of the dolomite of the Yeli-Liangjiashan Formation,and raised that regional weathering crust was formed by Huanyuan tectonic movement,which resulted in regional uplifting in the end of Early Ordovician,and that a great quantity of weathering crust vugs were deve-loped on the basis of dolomitisation.After these isolated vugs in the formation connected by the large mounts of fractures,which were generated by later fracturing reformation,the effective dolomite reservoir was formed.At the same time,the later faults linked up the atmospheric water and the lake water and reconstructed the reservoir by secondary corrosion.So the conclusion was that the development and its scale of this kind reservoir were controlled by later fracturing.
STUDY OF FORMING CONDITION ON MARINE EXCELLENT SOURCE ROCKS AND ITS EVALUATION
Qin Jianzhong, Tenger, Fu Xiaodong
2009, 31(4): 366-372. doi: 10.11781/sysydz200904366
Abstract(1708) PDF-CN(1094)
Abstract:
Forming condition of the marine excellent source rocks was studied by the simulation experiment on hydrocarbon generation and expulsion from a mass of different types source rocks and oiliness reservoir rocks,and comparative analysis on geological setting of global large oil and gas field and its marine source rocks.The main forming condition of the marine excellent source rocks form:1)advantage sedimentary environment including intraplatform depression/basin,lagoon,platform slope,anterior border slope and fore reef etc,where have exuberance planktons,tranquilization and deep seawater and reducing environment;2) rich organic matters,total organic carbon content TOC≥2%;3) Ⅰ-Ⅱ type of kerogen;4)paleo-petroleum pool and the dispersed soluble organic matter of the source rocks and reservoir rocks in course of hydrocarbon generation are excellent regenerative gas source during the organic carbon content is large than 0.2%.
HYDROCARBON GENERATION CHARACTERISTICS AND POTENTIAL OF BITUMEN IN THE TARIM BASIN
Li Huili, Shao Zhibing, He Zhiliang
2009, 31(4): 373-378. doi: 10.11781/sysydz200904373
Abstract(1471) PDF-CN(839)
Abstract:
Hydrocarbon generation characteristics and potential of bitumen widespread in Lower Paleozoic in the Tarim Basin are studied by thermal simulation experiments of bitumen sandstone and black oil.According to the result of thermal simulation experiments,both bitumen and black oil can generate hydrocarbon when heated,characterized by hydrocarbon cracking.Not only gas but also liquid hydrocarbon could be generated.There is no obvious difference in hydrocarbon generation potential among bitumen sandstone,black oil and low maturity marine carbonate source rock.Some phenomena of hydrocarbon generation by bitumen has been observed in Lower Paleozoic in the Tarim Basin,but still needs geochemical evidences.
STUDY ON THE APPRAISING STANDARD OF ORGANIC CARBON ABUNDANCE FOR EFFECTIVE MUDDY OIL SOURCE ROCKS-A CASE STUDY FROM THE DONGYING SAG
Li Zhiming, Guan Defan, Xu Xuhui, Qin Jianzhong, Zheng Lunju, Liu Wenbin, Wu Xiaojun
2009, 31(4): 379-383. doi: 10.11781/sysydz200904379
Abstract(1387) PDF-CN(963)
Abstract:
The porosity of source rock is its hydrocarbon generating space.When the pore space of source rock is fully filled by oil,the oil can be discharged effectively from source rock.According to the relationship model of porosity between thermal maturity and density for effective muddy oil source rocks from the Dongying Sag and combined with the relationship between maturity and organic carbon rate of conversion for source rocks of various types,the appraising standard of organic carbon abundance for the effective muddy oil source rocks from the Dongying Sag has been studied.The results show that appraising standard of organic carbon abundance for the effective muddy oil source rocks is great difference.The lowest values of total organic carbon abundance for effective muddy oil source rock with type Ⅰand Ⅱ are 2.01% and 3.51% respectively,and the residual organic carbon abundance for effective muddy oil source rock with typeⅠ and Ⅱ are 0.57% and 2.07% respectively.
GEOCHEMICAL CHARACTERISTICS OF AROMATIC HYDROCARBONS OF CRUDE OILS FROM ORDOVICIAN RESERVOIR IN THE TAHE OILFIELD
Jia Cunshan, Wang Yanbin, Gu Yi, Huang Jiwen
2009, 31(4): 384-388. doi: 10.11781/sysydz200904384
Abstract(1472) PDF-CN(878)
Abstract:
Aromatic hydrocarbons as the important components of crude oils are widely used in estimating depositional environment of source rooks and maturity of oil.The maturity and migration information of Ordovician oil in the main area of Tahe Oilfield can not be exactly inferred by the normal biomarker parameters of saturated hydrocarbon because of strong biodegradation,but it can be indicated by the aromatic hydrocarbon because of its good restrain to biodegradation.The GC-MS analyses of aromatic hydrocarbon indicates the Ordovician oils have rich naphthalene,phenanthrene and dibenzothiophene,but poor dibenzofuran and diphenyl,which demonstrated that all Ordovician oils come from the same source rocks.The environment of parent material is reduction-strong reduction.The maturation degree of Ordovician oil increases from west to east,from north to south,which is proved by alkylnaphthalene index,DBT and triaromatic steroid.As a result,Manjiaer Depression in the southeast of Shaya uplift belt is regarded as the main hydrocarbon kitchen of Ordovician gas and oil.
SOURCE ROCK EVALUATION OF TAIZHOU FORMATION IN HAIAN SAG, NORTHERN JIANGSU BASIN
Liu Pinglan
2009, 31(4): 389-393. doi: 10.11781/sysydz200904389
Abstract(1370) PDF-CN(932)
Abstract:
Source rock quality and exploration potential of the Taizhou Formation in the Haian Sag of the Northern Jiangsu Basin have puzzled geologists.Based on sampling analyses,organic geochemical profile of the formation has been set up.Source rocks are evaluated and exploration potential is predicted.Dark mudstone in the middle and upper section of the 2nd member of Taizhou Formation is not very contributory for reservoir.As to mudstone and muddy limestone at the bottom of the 2nd member of Taizhou Formation,average organic carbon content is high(2.32%).Kerogen is sapropel type or mixed type mainly composed of sapropel.It is in the low maturity to maturity stage and is a set of excellent source rock.Reserve of the Haian Sag is 4 242×104 t,and remnant recoverable reserve is 1 358×104 t,indicating good exploration prospect.
GEOCHEMICAL CHARACTERISTICS AND SOURCE OF PALEO- RESERVOIR SOLID BITUMEN IN SHIWANDASHAN BASIN
He Xunyun, Zhong Ningning, Chen Jianping, Wang Feiyu
2009, 31(4): 394-398. doi: 10.11781/sysydz200904394
Abstract(1752) PDF-CN(835)
Abstract:
Systematic geochemical analysis such as bitumen occurrence,group composition of dissolved organic matter,saturated hydrocarbon chromatography,biomarker compounds,carbon isotope and bitumen thermal maturation is applied to the solid bitumen of Laohushan and Shangtun paleo-reservoirs from Permian limestones in Shiwandashan Basin of Guangxi Province,China.And combined with geochemical characters of hydrocarbon source rocks and reservoir-forming mechanism,the source and genesis of above two solid bitumen has been discussed.The results show that the content of dissolved organic matter and saturated hydrocarbon is very poor and the content of aromatic hydrocarbon(the highest being 58.60%)and nonhydrocarbon is rich.The gas chromatogram analysis of saturated hydrocarbon show that bitumen is from reduction environment originating from lower grade aquatic geology with higher thermal evolution degree.The stable carbon isotope of bitumen is -27.8‰~-28.7‰,reflecting that the main source of input of source rock is lower aquatic biology.The lower content of sterane and terpane(dominated by low molecular compounds),higher content of pregnane in sterane series and tricyclic terpane predominated in terpane indicate that the bitumen was characterised by high evolution.Like the argillaceous source rock of Permian,there is nearly no aromatic sterane in bitumen.The reflectance of bitumen is 1.9%～2.5%,and the equivalent vitrinite reflectance is 1.6%~2.0%,associated with the results of reservoiring and evolution history,it shows that the bitumen experienced 230℃ temperature.Finally combined with relative geochemical characters of hydrocarbon and certain information of reservoir-forming,it is considered that the paleo-reservoir bitumen has closer genetic relationship with Upper Permian argillaceous source rock,and it is one of the final pyrolysis products of crude oil in paleo-reservoir,(that is pyrobitumen).
OVERALL EVALUATION BY MULTI-PARAMETERS ON MATURITY OF CRUDE OIL FROM THE BOZHONG SAG,THE BOHAI BAY BASIN
Ni Chunhua, Bao Jianping, Liang Shiyou
2009, 31(4): 399-402. doi: 10.11781/sysydz200904399
Abstract(1675) PDF-CN(955)
Abstract:
Maturity is the geochemical parameter that shows the relationship between crude oil and evolution stage of organic matter of source rock,which is the base of oil-source correlation,so evaluating method is very important.Effective appraisal range and applying condition need to be considered to use maturity parameters.Through overall evaluation on maturity by parameter of light hydrocarbon,aromatic hydrocarbon and sterane terpane,according to the relative high or low of maturity,the Tertiary oils in the Bozhong Sag of the Bohai Bay Basin are divided into two kinds:high-mature condensate oil and mature oil.High-mature condensate oil has high paraffin index,heptane value and methyl phenanthrene ratio,which mainly distribute in the southwest of the sag.Mature oil has contrary parameter characteristic.The result also shows there are multi-fountain source and multi-period reservoir in the Bozhong Sag.
ANOMALY PATTERN ORIGINS OF THE WIRE-ADSORBED HYDROCARBON INDICATORS-OVER THE JURASSIC GAS RESERVOIR OF WELL YINGNAN 2 IN THE TARIM BASIN
Jiang Tao, Tang Yuping, Wu Chuanzhi, Zhang Hengqi
2009, 31(4): 403-408. doi: 10.11781/sysydz200904403
Abstract(1451) PDF-CN(813)
Abstract:
A research on the causes of the anomaly patterns of the wire-adsorbed geochemical indicators over the Jurassic gas reservoir of Well Yingnan 2 in the Yingjishu Sag of the Tarim Basin has been conducted.The knowledge was gained that the water lock effect provides the favorable trapping and accumulation conditions for this gas reservoir,and the hydrocarbon gases within the reservoir can migrate upward through different ways(such as diffusion and permeation).The Jurassic gas reservoir of Well Yingnan 2 was chosen to conduct the research of the geochemical field characteristics and the anomaly patterns of the light wire-adsorbed hydrocarbon(C2-8) and the heavy wire-adsorbed hydrocarbon(C15-19) indicators.It is found that both the characteristics of the geochemical field and the anomaly patterns of the 2 kinds of indicators differ obviously from each other.The analysis results indicate that the water lock effect of the tight sandstones and the microseepage and diffusion ways of the hydrocarbons are the root causes of these differences;and the diffusion rate of the light hydrocarbons within the water-locked sandstone area in the gas reservoir is less than that within the area without water lock effect in the edge of the gas reservoir,which causes the high anomaly values of the light wire-adsorbed hydrocarbons(C2-8) in the edge of the gas reservoir and the sub-high anomaly values of these hydrocarbons in the gas reservoir area.The study also indicates that the low-content of heavy hydrocarbons in the gas reservoir and the local diffusion coefficient of the reservoir hydrocarbon gases are the geological causes of the high value anomaly of the heavy wire-adsorbed hydrocarbon indicators(C15-19) over the top of the this gas reservoir.
COMPARISON OF DIFFERENT HYDROCARBON GENERATION SIMULATION APPROACHES AND KEY TECHNIQUE
Mi Jingkui, Zhang Shuichang, Wang Xiaomei
2009, 31(4): 409-414. doi: 10.11781/sysydz200904409
Abstract(1478) PDF-CN(948)
Abstract:
Hydrocarbon generation simulation experiment is an important approach in resource assessment and confirmation.The experiment system can be divided into 3 types:open,semi-open and closed.Different system has different advantage and disadvantage,and can be chosen to resolve different problems.The accuracy of reaction temperature,mostly determined by the frame of simulation system,has great influence on the application of experiment results.Experiments of different samples under different pressure in the same simulation system are important for researches of influence of pressure on hydrocarbon generation.
SEDIMENT LOGICAL INTERPRETATION FOR SEISMIC INVERSION RESULTS
Yang Guixiang, Huang H, ong, Gao Rui, Zhang Ruwei
2009, 31(4): 415-419. doi: 10.11781/sysydz200904415
Abstract(1520) PDF-CN(1286)
Abstract:
Research of sedimentary characteristics is very important in the process of reservoir exploration and development.Seismic inversion technology is combined with sedimentological principle to characterize sedimentary features,which is the most effective method to carry on sedimentary microfacies research based on seismic data.Seismic phase-controlled concept is br ought into nonlinear random inversion to make inversion results approach geological features.Guided by seismic sedimentology theory,combined with seismic facies analysis technique,based on high-accuracy seismic inversion results,sedimentary features are interpreted in well area C15 of CZ depression as a exploratory application,which has higher reliability than sedimentary features characterized directly on seismic section and yields better fine sedimentary microfacies characterization.
A STUDY ON INTEGRATED EVALUATION OF PETROLEUM RESOURCES WITH OBJECTS AND ITS SYSTEM INTEGRATION
Mi Shiyun, Guo Qiulin, Hu Suyun, Yang Qiulin, Zhang Qingchun, Xue Hongbing, Chen Ningsheng
2009, 31(4): 420-426. doi: 10.11781/sysydz200904420
Abstract(1366) PDF-CN(791)
Abstract:
The technology of integrated evaluation of petroleum resources with objects is one of the top ten technologies that the global petroleum industry should devote major efforts to develop in the 21st century.After analyzing its technological characteristics and application demands,an overall structure of the software system was put forward.Furthermore,the integrated software system-Integrated eva-luation system of petroleum resources with objects,RIOSys 1.0,which set exploration data management,resources assessment and objects evaluation in one,was developed.This system consists of two layers,the lower one is the integration platform and database(data and graphics),the upper one deals with series of different application software modules,such as basin studies,play evaluation and exploration decisions.RIOSys 1.0 integrates several new technologies such as data mapping database,exploration development block evaluation,assessment and decision of exploration target,spatial distribution and probability prediction methods of petroleum resources,so it provides an integrated platform for the studies of integrated evaluation of resources with objects,and will play an important role in the future petroleum exploration and research.
REE ANALYSIS METHOD AND APPLICATION-TAKING SOURCE ROCKS IN YONGAN REGION OF THE DONGYING SAG,THE BOHAI BAY BASIN AS EXAMPLE
Liu Ning, Fan Dehua, Hao Yunqing, Li Bo
2009, 31(4): 427-432. doi: 10.11781/sysydz200904427
Abstract(1524) PDF-CN(982)
Abstract:
With REE ICP-AES,based on analysis of REE in Yongan region of the Dongying Sag of the Bohai Bay Basin,REE distribution patterns of parent rocks(Ar,Pz,Mz) and sedimentary rocks(Es4 and Es3) are set up.Comparing REE distribution characteristics of parent rocks with sedimentary rocks,provenance of Es4 and Es3 in sedimentary region is analyzed.REE characteristics of Es4 in sedimentary zone and Mesozoic and Lower Paleozoic in parent rock zone are the most similar.REE characteristics of the middle and lower Es3 in sedimentary zone are similar with that of Mesozoic,Lower Paleozoic and Archaeozoic in parent rock zone.REE characteristics of the upper Es3 are similar with that of Archaeozoic in parent rock zone.The above mentioned differences in REE distribution indicate different sources during Es4 and Es3 periods.
2009, 31(4): 433-433. doi: 10.11781/sysydz200904433
Abstract(540) PDF-CN(290)
Abstract:

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