石油实验地质

Contents Vol.32, No.3 Jun., 2010

2010, 32(3)

Abstract(1038) PDF-CN(916)

Abstract:

FAULT SYSTEMS AND CHARACTERISTICS OF THEIR CONTROLLING RESERVOIR FORMATION IN THE NORTHEAST CHINA

Luo Qun

2010, 32(3): 205-210. doi: 10.11781/sysydz201003205

Abstract(1791) PDF-CN(1318)

Abstract:
There are three fault systems with different features: the west,middle and east fault system in the Northeast China according to different tectonic settings and stress fields.This causes a great difference in the basin forming,hydrocarbon accumulating and reservoir forming in different regions.These fault systems control petroleum distribution in different regions of the west,middle and east fault system.By studying and contrasting the relationship between the petroleum accumulation distribution and fault action,this paper points out that different reasons for the petroleum accumulation are caused by fault system characteristics and these controlling factors.This paper also gives us the exploration proposes of Northeast China according to the synthesis analysis.

STRUCTURAL EVOLUTION AND MODEL OF HYDROCARBON ACCUMULATION IN BURIED HILLS IN THE CENTRAL LIAOHE BASIN

Zhang Qinglong, Ge Rongfeng, Zhao Liwen, Du Yanyan, Mu Deliang

2010, 32(3): 211-217. doi: 10.11781/sysydz201003211

Abstract(1890) PDF-CN(1149)

Abstract:
The construction and quantitative restoration of regional balanced cross-sections in the central Liaohe Basin have revealed four tectonic evolution stages: the late Mesozoic initial rifting,the Paleocene-Eocene intensive rifting,the Oligocene dextral transtension and the depression since the Miocene.The amounts,ratios and rates of crustal extension were estimated,providing detailed constraints to each evolutional stage.The characteristics of fractures on the buried hills at the southern central uplift of Liaohe Basin were suggested that they were probably secondary shear fractures induced by the sinistral strike-slip of Tanlu fault during the late Mesozoic.These fractures,however,were altered to be competent for hydrocarbon migration and reservation during the Cenozoic rifting stage.Dextral strike-slip was taken place on the Tanlu fault during the Oligocene and new EW fractures were produced,which controlled the hydrocarbon distribution in this region.In terms of petroleum geology we suggested that the local highs on the unconformity surface and the fault terminations,inflexions or intersections in the buried hills were the potential targets of hydrocarbon exploration.

ANALYSIS OF RELATIVE SEALING AND ABSOLUTE PERMEABILITY OF FAULT-TAKING PERMIAN HYDROCARBON CHARACTERISTICS OF THE REGION 8 AND THE BAIKOUQUAN AREA, NORTHWEST MARGIN, THE JUNGGAR BASIN FOR EXAMPLE

Gao Gang, Liu Guangdi, Huang Zhilong

2010, 32(3): 218-222. doi: 10.11781/sysydz201003218

Abstract(1644) PDF-CN(1119)

Abstract:
In this paper,according to the characteristic analysis of oil and gas of the Xiazijie and Fengcheng Formation in fault oil field of the region 8 and the Baikouquan area of the Northwest margin,the Junggar Basin,the authors discussed the fault's property of sealing and unsealing.Ordinarily,for the fault oil and gas accumulation,there is an intimate relation between the horizontal distribution features of hydrocarbon characteristics and the sealing property of the fault.In a strong sealing fault hydrocarbon reservoir,because of the gravitational force differentiation of oil and gas,the contents of dissolved gas in the crude oil and methane will gradually increase and the density and the viscosity of crude oil will decrease from the bottom to the top of reservoir.While in a poor sealing fault hydrocarbon reservoir,the righter hydrocarbons are easily lost near the fault.From the bottom to the top of the fault reservoir,the contents of dissolved gas in crude oil and methane will gradually decrease and the density and the viscosity of crude oil will increase.When different hydrocarbon reservoirs have same pool formation conditions,the characteristics of oil and gas will have a regularity alteration owing to the different sealing property.In the research area,there is different degree sealing to updip faults of the hydrocarbon reservoir.They have all absolute unsealing and relative sealing.For the hydrocarbon reservoir of the Xaizijie and Fengcheng Formation,there is a relatively better sealing in the region 8 than in the Baikouquan area.

PETROLEUM GEOLOGY AND HYDROCARBON DISTRIBUTION PATIERN OF HUAGANG FORMATION IN THE XIHU SAG OF THE EAST CHINA SEA

Zhang Yinguo

2010, 32(3): 223-226. doi: 10.11781/sysydz201003223

Abstract(1465) PDF-CN(962)

Abstract:
The Xihu Sag with relatively great exploration breakthrough in the East China Sea shelf basin has a great exploration potential.Huagang Formation of the Xihu Sag holds good petroleum geology conditions,which has multiple hydrocarbon sources in which the main is Pinghu Formation,and good reservoirs and regional seals are well developed.Structural trap is the main trap type,such as rollover anticline and compression anticline trap,and oil-gas reservoirs are also belong to these two types.Based on the analysis of the petroleum geology and hydrocarbon distribution pattern of the Huagang Formation,it is considered that the western part mainly contains oil,while the eastern part mainly contoins gas,and the main hydrocarbon distributes in the middle and southern part of the Xihu Sag in which the structure is more locally developed.

SANDSTONE DIAGENESIS AND THE INFLUENCE ON CHANG 6 RESERVOIR OF BAIBAO AREA, ORDOS BASIN

Guo Wei, Shi Danni, He Shunli

2010, 32(3): 227-232. doi: 10.11781/sysydz201003227

Abstract(1456) PDF-CN(1100)

Abstract:
Based on the data analysis of casting lamella,scan lectron microscope and X-ray diffractions etc,the diagenesis is belong to the"B"middle diagenesis on the Chang 6 reservoirs in Baibao area of the Ordos Basin.The compaction and carbonate-cementation destroy the primary-texture of pore intensively,which deteriorate the physical property.The cementation of clay minerals improve the pore for growth of chlorite,but will deteriorate the permeability since they jamed the throat.Dissolution and fracturing change the pore structure effectively,which improved the physical property of reservoirs.

DISTRIBUTION AND EVOLUTION CHARACIERISTICS OF ABNORMAL PRESSURE AND ITS RELATIONSHIP WITH HYDROCARBON ACCUMULATION IN THE DONGYING SAG OF BOHAI BAY BASIN

Liu Shilin, Zheng Herong, Lin Ge, Wang Yi, Yun Jinbiao, Gao Shanlin, Xu Lei

2010, 32(3): 233-237. doi: 10.11781/sysydz201003233

Abstract(1932) PDF-CN(1081)

Abstract:
Numerical simulation method is applied to analyze distribution and evolution characteristics of abnormal pressure system in the Cenozoic Dongying Sag of the Jiyang Depression,the Bohai Bay Basin.The results show that there are extensive abnormal pressure systems in the 3rd and 4th members of Paleocene Shahejie Formation in the Dongying Sag,and they are mainly overpressure ones.Overpressure system has begun to develop since the Shahejie Formation deposits,and increases gradually until the terminal of Dongying episode.In the late Oligocene strata,uplifting and denudation which result from the 2nd episode of Himalaya Movement change the overpressure system into minus-pressure system.After this,fluid pressure of overpressure system increases once more along with the sedimentary period of Guantao Formation in Miocene,and achieves maximal area and maximum in the period of Minghuazhen Formation and Quaternary.At present the normal pressure system locates at the formation above 2 200 m in depth,and the overpressure system is formed at the formation below 2 200 m.High sedimentary rate of the Shahejie Formation makes the development of overpressure system during the early stage,whereas both clay mineral dehydration and hydrocarbon generation result in dramatically rising of fluid pressure of overpressure system since the Late Oligocene.Combined with research conclusion of hydrocarbon accumulation stages,overpressure systems which develop in the terminal of Dongying period,the terminal of Guantao period,and the Minghuazhen-Quaternary period have good relationship with the 3 hydrocarbon accumulation stages of the Dongying Sag.It suggests that hydrocarbon generation is an important reason for overpressure development;meanwhile,overpressure is a favorable power for hydrocarbon migration.

PETROLEUM GEOLOGICAL FEATURES AND EXPLORATION POTENTIAL ANALYSES OF THE BONAPARTE BASIN, AUSTRALIA

Huang Yanqing, Bai Guoping

2010, 32(3): 238-241. doi: 10.11781/sysydz201003238

Abstract(1850) PDF-CN(1359)

Abstract:
Bonaparte Basin is an important oil and gas producing basin in Australia and one of the world-class gas-rich basins.It experienced several stages of rifting and the remobilization of the faults.The basin was filled with about 15 km thick sediments.Some sets of source rocks and reservoir were developed in Bonaparte Basin.Hydrocarbon is mainly reserved in the Permian,Triassic and Jurassic.Regionally,oil is mostly distributed in the Vulcan Sub-basin and the northwest of the basin.Condensate is distributed in the Sahul Platform and the northwest of the basin.Gas is mainly distributed in Calder Graben and Sahul Platform.Integrated petroleum geological analyses indicate that the basin has considerable exploration potential.The moderately explored Calder Graben,Malita Graben and the northwest of Petrel Sub-basin comprise the areas with the best exploration potential.

CHARACTERISTICS OF THE CHANG 6 RESERVOIR OF THE FUXIAN AREA IN THE ORDOS BASIN

Zhang Hui, Meng Xiangzhen, Guo Yanqin, Zhang Xiaoquan, Yang Hua, Liu Yan, Feng Hui

2010, 32(3): 242-246. doi: 10.11781/sysydz201003242

Abstract(1802) PDF-CN(954)

Abstract:
Delta sediments are the main deposits in the Chang 6 oil beds of Yanchang Formation in Fuxian area of the Ordos Basin and the sand bodies of distributary channel and subaquatic distributary channels are main reservoirs for the hydrocarbon.Fine lithic arkose sandstone and fine arkose sandstone are main sandstones of the Chang 6 reservoir.They have line and point-line contact forms with pore and thin film cementation between rock grains.The Chang 6 reservoir is characterized by the low component maturity and high textural maturity.The main pore types are granular pore and secondary feldspar-dissolution pore which are mainly composed of small hole and micropore.The Chang 6 reservoir has super low permeability and is accessed densify reservoir of which the permeability is less than 3×10^-3μm².The strong compaction and cementation are the main factors which cause the low porosity and low permeability of the reservoir,while dissolution is the main factor for improving the physical property of the reservoir.

HYDROCARBON ACCUMULATION PROCESS IN SOUTH STEEP SLOPE, BIYANG SAG, NANXIANG BASIN

Xia Dongling, Yin Wei, Li Zhi

2010, 32(3): 247-251. doi: 10.11781/sysydz201003247

Abstract(1520) PDF-CN(983)

Abstract:
Evolution history of hydrocarbon source rocks and tectonics dominates hydrocarbon accumulation in the south steep slope of the Biyang Sag,the Nanxiang Basin.In the slope,early paleo-reservoirs are formed by small-scale hydrocarbon charging during the late Eh¹-Eh² of Paleogene.The middle key reservoirs of Eh³ are formed by relatively larger volume of hydrocarbon charging during the late El uplifting stage of early Paleogene.The shallow secondary oil and gas reservoirs are formed by destruction and redistribution of paleo-reservoirs due to late Himalayan tectonic movement at late Neogene.In ge-neral,it is the early and middle uplifts during late Eh¹-Eh² of Paleogene which control oil and gas accumulation in the south steep slope,while the structural adjustment in the late stage dominates the pre-sent distribution of oil and gas.The small-sized uplifts developed in shallow formations,the lithologic traps developed in flanks of large-sized uplifts as well as the fracture traps developed in bedrock are important targets for future exploration.

SEDIMENTARY CHARACTERISTICS AND MODE OF THE YANCHANG FORMATION MIDSECTION OF BAIBAO AREA IN THE ORDOS BASIN

Guo Deyun, Guo Yanqin, Li Wenhou, Zhang Hui, Li Keyong

2010, 32(3): 252-257. doi: 10.11781/sysydz201003252

Abstract(1477) PDF-CN(991)

Abstract:
To identify the sedimentary characteristic and divide the sedimentary type of Chang 4+5 and Chang 3 Member of Yanchang Formation midsection of Baibao area in the Ordos Basin,the main me-hods used include the core observation,well logging data analyses and description of deposition system and sedimentary facies.It is found that the deposition system is lacustrine-delta in which the delta front develop in the northeast of the studying region and the shallow-lake deposits develop in southwest which scale is small.The shallow water platform delta is develop chiefly in region of studying and the completion prograded sequence is absent.Owing to the subaquatic distributary channels diversion,the sand of subaquatic distributary channels and the mudstone of interchannel are intimate associated and repeated overriding or the sand of subaquatic distributary channels is located on the mudstone of lacustrine facies directly in individual well section.

PETROLEUM MIGRATION SYSTEM AND NEOGENE PETROLEUM ACCUMULATION FEATURFS IN THE BAXIAN SAG, BOHAI BAY BASIN

Lu Xuejun, Liu Hua, Wang Jianrui, Zhang Yongfeng, Lian Baofeng

2010, 32(3): 258-261. doi: 10.11781/sysydz201003258

Abstract(1609) PDF-CN(1029)

Abstract:
Neogene reservoirs are mainly distributed in Guantao Formation of Wen'an slope,the Baxian Sag of the Bohai Bay Basin.Reservoir types are fault nose reservoirs and fault block reservoirs controlled by fault.The distribution of reservoir is clearly subjected to effective migration system.By studing oil and gas shows,effective pore space,fluid properties and nitrogen compounds,effective migration system and petroleum accumulation features in Wen'an slop area are analyzed.And accumulation models of Neocene reservoirs are established.Studies have shown,the passage system in the study area is made up of sand bodies,faults and unconformities.Oil and gas is mainly from source rocks in Es₁ subsection,then it migrates through sand bodies of upper Es₁ subsection,Dongying Formation and Guantao Formation,faults and unconformities.With the increasing migration distance,migration horizons are getting newer,in the end it gathered in Neogene strata of the Wen'an slope.

HYDROCARBON-FORMING ORGANISMS IN EXCELLENT MARINE SOURCE ROCKS IN SOUTH CHINA

Qin Jianzhong, Tao Guoliang, Tenger, Bian Lizeng, Xie Xiaomin, Fu Xiaodong

2010, 32(3): 262-269. doi: 10.11781/sysydz201003262

Abstract(1742) PDF-CN(946)

Abstract:
Based on previous studies,excellent marine source rocks in South China were collected and studied by Scanning Electron Microscope and Energy Dispersive Spectrometer.Compositions,hydrocarbon-forming organisms,sedimentary environments and hydrocarbon potential of the excellent marine source rocks were discussed.There are three types of hydrocarbon-forming organisms in the excellent marine source rocks: 1) Pelagic algae,including siliceous Mallomonas,Acritarchs(siliceous Leiosphaeridia,Diatom,Micrhystridium and so on),Cyanophyta(calcareous Chroococcus and so on),and calcareous Tasmanaceae.2) Benthic organisms,including siliceous or baritic or ferruginous algal mats,siliceous sporangium,siliceous filaments relic,siliceous sponge,and original Nematothallus(containing clay).3) Fungi,including calcareous fungi hypha(containing organic matter),calcareous bacteria(containing organic matter),sulfur bacteria(not always containing organic matter),iron bacteria(containing organic matter),calcareous nanobacteria,and so on.Palaeoenvironment was analyzed according the elements and hydrocarbon-forming organisms compositions.Modern algae hydrous pyrolysis in closed system and pyrogenation of oil shales which contain single hydrocarbon-forming organism were carried out.Hydrocarbon potential of pelagic algae was equivalent to type Ⅰ kerogen,and the benthic algae was equivalent to type Ⅱ kerogen.

THE CHARACTERISTICS OF MINERAL COMPONENTS FOR EFFECTIVE SOURCE ROCKS FROM DONGYING DEPRESSION OF BOHAI BAY BASIN AND ITS SIGNIFICANCE

Li Zhiming, Yu Xiaolu, Xu Ershe, Jiang Hong, Xi Binbin, Yang Qi

2010, 32(3): 270-275. doi: 10.11781/sysydz201003270

Abstract(2440) PDF-CN(1533)

Abstract:
The results of X-ray diffraction of effective source rocks in Dongying Depression of the Bohai Bay Basin show that the main mineral components of effective source rocks for Es^3(下) and Es^4(上) are quartz,feldspar,clay(illite and illite-smectite),carbonate(calcite and dolomite);the minor mineral components are pyrite,gypsum,anhydrite,mineral salt and brongniartine.This suggests that both source rocks are deposited in moderate deep or deep lacustrine facies with brinish,alkalic and strength reduction water body.The percent of smectite in illite-smectite(%S) of effective effective source rocks can quite truly reflect the thermal maturity of source rocks.The characteristics of mineral components for both source rocks are similar to the shale with high production of shale gas,that is rich in brittle minerals and lower in clay mineral.This means both source rocks in Dongying Depression are favorable to form fracture and can be fractured easily,and are also favorable to produce shale gas.The favorable places for prospecting and developing shale gas in Dongying Depression are at the main sag of Lijin and Minfeng.

EVALUATION OF JURASSIC-CRETACEOUS MARINE HYDROCARBON ROCKS IN THE BOLIN BASIN, SOUTHWESTERN TIBET

Wang Licheng, Wang Chengshan, Wu Xinhe, Li Yalin, Wei Yushuai

2010, 32(3): 276-281. doi: 10.11781/sysydz201003276

Abstract(2053) PDF-CN(1028)

Abstract:
The Bolin Basin,located on the southwestern margin of Tibetan Plateau,is a Mesozoic marine petroliferous basin covering an area of 30 000 km².The basin has been received little hydrocarbon interest for its severe climate and life conditions,although it situates in the east of Tethyan realm,which is concentrated about 70% of the total world petroleum resources.Measured section and geochemical ana-lysis are combined to better understand the hydrocarbon potential.Two major source rock units have been identified: the Upper Jurassic Menkadun Formation and the Lower Cretaceous Gangba Group.Their potential source rock successions,mainly composed of dark shales during Oxfordian-Tithonian and Aptian,respectively,were deposited in outer shelf.TOC content ranges from 0.67 to 1.62 weight percent with an average value of about 1.03 weight percent for the Menkadun Formation and 0.7 to 1.08 weight percent with an average value of about 0.86 weight percent for the Gangba Group.All shale samples are composed of a mixed typeⅡ₁(oil prone) kerogen.The vitrinite reflectance data and biomarker suggest that the Gangba Group is at late mature with respect to petroleum generation and the Menkadun Formation is overmature with respect to liquid hydrocarbon generation.These data indicate the shales of the units are good potential source rocks.Therefore,the good source rocks supply abundant matters for the formation of oil and gas in this area.

PHYSICAL PROPERTY VARIATION OF CRUDE OIL IN BEACH AREA, LIAOHE BASIN

Xie Chen, Hai Junjie, Liu Zhengjun, Ge Mingxi

2010, 32(3): 282-284. doi: 10.11781/sysydz201003282

Abstract(1360) PDF-CN(973)

Abstract:
Based on relationship between crude oil density,viscosity and depth,it is established in this paper the data model and the complete geologic profile of crude oil physical property in beach area of the Liaohe Basin.Physical properties of crude oil from different wells and formations are analyzed.Figures are drawn and it is concluded that density and viscosity of crude oil increase with depth and the variation trend varies in different formations.The distribution of crude oil physical property assumes ring-shaped surrounding the hydrocarbon kitchen in plane.Viscosity and density of crude oil show regular decreases in ring from hydrocarbon kitchen to the surroundings.It is also consistent with the distribution characteristics of oil and gas accumulation zone,which appears zonal distribution around the depression.

CHEMICAL CHARACIERISTICS OF FORMATION WATER SIGNIFICANT TO OIL RESERVOIR IN DONGYING FORMATION, NANPU SAG, BOHAI BAY BASIN

Xu Deying, Zhou Jiangyu, Wang Hua, Zhuang Xinguo

2010, 32(3): 285-289. doi: 10.11781/sysydz201003285

Abstract(1388) PDF-CN(1000)

Abstract:
The Nanpu Sag is a hydrocarbon-rich sag in the north of Bohai Bay Basin.The Dongying Formation is an important oil and gas exploration target.Statistical analyses of chemical characteristics of the Dongying Formation water have indicated that the formation water in the sag belongs to NaHCO₃ type with medium-low mineralization degree.Preservation conditions in member Ⅰ and Ⅱ of the Dongying Formation as well as in the Beipu Oil Field are the best.Fault sealing tracing has been done with parameters of chemical characteristics of formation water.Combined with analyses of characteristics of regional cap rock,fault activity and hydrocarbon accumulation,it is found out that in the regional cap rock generation area,main faults and shallow branch faults are the important targets for shallow oil and gas exploration.The region around the main faults below member 2 of the Dongying Formation is the main target for middle-deep oil and gas exploration.

WELL LOGS RESPONSE AND PREDICTION MODEL OF ORGANIC CARBON CONTENT IN SOURCE ROCKS-A CASE STUDY FROM THE SOURCE ROCK OF WENCHANG FORMATION IN THE PEARL MOUTH BASIN

Xu Sihuang, Zhu Yiqing

2010, 32(3): 290-295. doi: 10.11781/sysydz201003290

Abstract(1856) PDF-CN(1387)

Abstract:
The evaluation of source rocks from well loggings can make up for the insufficiency of source rock core and discontinuity of samples examined.Organic-rich source rocks show relative increase in response to resistivity,neutron,sonic transit time and gamma loggings and decrease in response to density logs.Based on this response relationship,well logging data not only can be used to identify qualitatively source rocks from non-source rocks,but also predict quantificationally organic carbon content in source rocks.The predicting models proposed during past fifty years can be summed up as qualitative identification model,volume model,cross plot model,regression equation model,ΔlogR technique,and fuzzy model.The TOC of Wenchang Formation source rock in Huizhou Depression and Panyu 4 Sag in the Pearl River Mouth Basin shows similar degree of correlation respectively to resistivity,neutron,sonic transit time,gamma and density.So,the five variate regression equation should be the best prediction model for this study area.The organic carbon content of whole Wenchang Formation of one well in Panyu 4 sag predicted by this numerical model,and it shows good results verified by the lithological description and the TOC test of core samples in this well.

THE FIELD EXPERIMENT AND RESULTS ANALYSIS OF CO₂ MISCIBLE DISPLACEMENT IN CAOSHE OILFIELD OF THE NORTH JIANGSU BASIN

Zhang Fengdong, Wang Zhenliang

2010, 32(3): 296-300. doi: 10.11781/sysydz201003296

Abstract(1677) PDF-CN(984)

Abstract:
The Taizhou Fm reservoir in Caoshe Oilfield of the North Jiangsu Basin is a complicated and small fault block reservoir,its oil recovery by water displacement is only 32%.Combinating the laboratory and simulation results on CO₂ miscible displacement and field experiment,the theorical and pratical analysis and contrast of oilfield development are accomplished.The oil recovery of this reservoir could be enhanced upto 47% according to results of laboratory experiment and numerical simulation,and higer 15% than water drive.From May 2005 to Dec.2009,the field experiment of CO₂ miscible displacement has been finished in Taizhou Fm reservoir of Caoshe Oilfield,the cumulative amount of CO₂ gas flooding is upto 5 842×10⁴m³,the production of crude oil is increased 3×10⁴t,the oil recovery is enhanced 2%.CO₂ miscible displacement is an effective method of enhancing oil recovery,which has important reference value on tertiary oil recovery in complicated and fault block reservoirs.

ESTABLISHMENT AND APPLICATION OF GC-PFPD ANALYTICAL METHOD FOR THIOPHENIC COMPOUNDS

Xu Daqing

2010, 32(3): 301-304. doi: 10.11781/sysydz201003301

Abstract(1726) PDF-CN(925)

Abstract:
By use of gas chromatograph(GC) and pulse flame photometric detector(PFPD),after series of conditional experiments,the GC-PFPD analytical method for thiophenic compounds in oil and source rock has been established.Thanks to this method,the low-abundance 7 benzothiophenic compounds,19 dibenzothiophenic compounds and other sulf-aromatic hydrocarbons in oil and source rock are detected,with better precision than the GC-MS method.In application of this method,it has indicated that for the thiophenic compounds of crude oil and source rock in the Jiyang Depression of the Bohai Bay Basin,the dibenzothiophenic compounds are predominant and the content of benzothiophenic compounds is very low.The 'V' type distribution of the four methyl-dibenzothiophenic compounds is not only for carbonate rock,but also for mudstone deposited in salt water.And the distribution of the 4 compounds is influenced by both sedimentary environment and thermal evolution of t source rocks.

MONTE CARLO SIMULATION-A CASE STUDY OF MARIB-SHABWA BASIN IN YEMEN

Gao Jiji, Bai Guoping, Qin Yangzhen, Zhou Zhilong

2010, 32(3): 305-308. doi: 10.11781/sysydz201003305

Abstract(1868) PDF-CN(1092)

Abstract:
In the World Petroleum Assessment 2000 project,U.S.Geologic Survey(USGS) adopted the method of probabilistic multiplying,namely Monte Carlo simulation to obtain the forecast for undisco-vered petroleum resources.This method is applied to the resources assessment of the Marib-Shabwa Basin in Yemen,and the results show the undiscovered resources will be 102 million tons of oil equivalents(TOE).In the study area,the syn-rift play is considered to be mature,while the fractured basement play is supposed to be highly promising.

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