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1995 Vol. 17, No. 1

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NON-MARINE SEDIMENTARY FACIES AND DISTRIBUTION OF SOURCE ROCKS AND RESERVOIRS IN CHINA
An Zuoxiang
1995, 17(1): 1-7. doi: 10.11781/sysydz199501001
Abstract(882) PDF-CN(500)
Abstract:
For scores of years,the petroleum exploration of China has been mainly targeted at non-marine sedimentary facies.However,the relations of sedimentary patterns with source and reservoir rocks are roughly as follows:source rocks occurred in deep lacustrine,hypabyssal lacustrine and paludal facies,while reservoir rocks could be developed in various environments,in China being predominated by deltaic facies,alluvial fan and shallow lake beach-bar,as well as the weathering crust of basinal basement rocks.During the process of sedimentation,the source and reservoir rocks generally occurred in cycles,which can be grouped into source-reservoir-cap assemblages distinguished as 4 types i.e.lower,upper,auto-land lateral geneses.
THE FLUID-FLOWING CONVECTION AND THE FORMATION OF DIAGENETIC TRAPS IN THE DONGPU DEPRESSION
Ji Youliang, Zhao Chenlin, Liu Menghui
1995, 17(1): 8-16. doi: 10.11781/sysydz199501008
Abstract(660) PDF-CN(439)
Abstract:
The discussions are made on the influence of fluid-flowing convection over the formation and distribution of secondary pores.It is pointed out that the upwelling of fluid-flowing should cease in the depth of 4000m in the reservoirs of the depression due to the barrier fault of upward dipping players,the existence of overpressure and insufficient fluid source.Therefore,the thermal-cyclic convection flowing is predominated and the continuous transformation of soluted material took place by the convection flowing,bringing about the formation of secondary pores and diagenetic traps in deep part of the Dongpu Depression
ON THE TYPE OF THE YINING BASIN AND ITS SIGNIFICANCE OF PETROLEUM GEOLOGY
Dong Xiufang, Xiong Yongxu
1995, 17(1): 17-25. doi: 10.11781/sysydz199501017
Abstract(644) PDF-CN(268)
Abstract:
Three stages of tectonic evolution for Yining composite basin are distinguished:Carboniferous early Permian,late Permian and Meso-Cenozoic,correspondingly three prototype basins,i.e.an intra-arc basin,an intra-arc remnant basin and intermontane basin dynamically dominated by distal collision were successively formed.The intra-arc basin is a typical extensional basin,and the intra-arc residual basin is attributed to a depressed basin resulted from the cooling shrinkage of the mantle,both with developed source rock series.The distal-collisional intermontane basin is a compressive basin,with poor developed source rocks.Therefore the former two basins have a promising prospect for oil-gas exploration
PREDICTION ON RESERVOIR PARAMETERS WITH A CONDITION OF TWO DRILLING WELLS
Jin Qiang, Zeng Yi, Ren Huaiqiang, Yang Shaochun
1995, 17(1): 27-33. doi: 10.11781/sysydz199501027
Abstract(688) PDF-CN(303)
Abstract:
The prediction on reservoir parameters between drilling wells can only be carried out with the data from many drilling wells by convention mathmatical statistics.However.the authors developed a new method available for the prediction on reservoir parameters of only two wells,applying geostatistics combined with fractional geometry in reservoir description.By this method,the parameters at any point of certain reservoir target stratum between two wells can be predicted,even more the parametric section of target strata linked with two wells can be achieved.Therefore,it details the characterization of reservoirs and promotes the digitization of reservoir description.
FLUME-EXPERIMENTAL STUDY ON THE FORMATION AND EVOLUTION OF LAKE DELTA SANDBODY
Liu Zhongbao, Lai Zhiyun, Wang Qisheng
1995, 17(1): 34-41. doi: 10.11781/sysydz199501034
Abstract(720) PDF-CN(379)
Abstract:
In this paper,the modelling of formation and evolution of delta sandbodies is made with lake sedimentary environment in a condition of 3.5m×1.0m×0.6m flume and 5.0m×2.5m×0.6m basin.In addition,the authors model on the process of regression and progredation.The main achievements of such experimental studies can be concluded as:1)the geometry and deposition rate of delta sandbodies are controlled by water depth of lakes;2)the ratio of sandbody width/height is the key parameter for recognition of delta sandbody geometry and 3)the flood would play an important role for the deformation of the delta sandbodies.
ON THE ORIGIN OF PRESSURE FIELD IN THE FUYANG FORMATION OF THE NE SONGLIAO BASIN
Lou Zhanghua, Zeng Yunfu, Gao Ruiqi, Jiang Chuanjin
1995, 17(1): 42-46. doi: 10.11781/sysydz199501042
Abstract(523) PDF-CN(308)
Abstract:
The pressure field in the Fuyang Formation can be obviously divided into 4 areas which are mainly controlled by the origin and evolution of hydrodynamic field.The pressures in centripetal and cross-formational flow areas are normal with the coefficients decreasing from 1.02 to 0.97 along flow direction,while the pressure in centrifugal flow area is dominated by overpressures,with the coefficients decreasing from 1.30 to 1.06 along flow direction,being normal pressures towards its rim,and motionless area is dominated by subpressures with the coefficients of 0.96～0.75.The pressures are related with the recharge-discharge system of pore fluids and pressure field is also influenced by(1)gas escaping,(2)evaporation of water,(3)hydration of unstable debris,such as feldspar and volcanic fragments,(4)unloading caused by bed evasion,and(5)geothermal decrease.
STUDY ON BURIED HILL RESERVOIR OF CARBONATE ROCKS IN VIEW OF THE KARST CHARACTERS IN GUILLIN AREA
Xing Yun
1995, 17(1): 47-54. doi: 10.11781/sysydz199501047
Abstract(639) PDF-CN(232)
Abstract:
After an investigation and survey on the karst topography in Guilin area,the paper concludes that three important topics should be considered for a better understanding of carbonate buried hill reservoirs,namely a prediction on the occurrence of sandstones,the relation of the occurrence of solution openings and fissures in a buried hill with their lithologies and textures;and the relation of reservoir spaces with tectonics.
GEOCHEMICAL CHARACTERISTICS OF CARBONATE ROCK DIAGENESIS
Li Shuangying, Jin Fuquan, Wang Daoxuan
1995, 17(1): 55-62. doi: 10.11781/sysydz199501055
Abstract(907) PDF-CN(464)
Abstract:
The paper deals with the distribution of trace elements,such as Sr.Na,Fe.Mn in carbonate rocks occurred under various diagenetic environments with a case study of the carbonate rocks(Z-T)in the Chao County.The limestones(O,upper part of C1h.C2h.C2c)origined mainly from meteoric diagenesis are characterized by low concentrations of Sr(188ppm),Na(132ppm),Mn(149ppm),while the limestones(Clj,lower part of C1h.P1q,T1n)mainly derived from submarine diagenesis by high concentrations of Sr(515ppm),Na(396ppm),Mn(404ppm).The penecontemporaneous sabkha dolomites(T2d),in comparison with penecontemporaneous-back poly-origin dolomites(Z-∈)which origin mainly from diagenesis dolomitization,has high concentrations of Sr(138ppm),Na(806ppm),and the later have low concentrations of S(103ppm)and Na(604ppm).It is significant for the difference in Mn content between the dolomites.The dolomite rocks,in comparison with the limestones,have high Na and low Sr,Mn.Moreover,it is obvious that Fe content tends to be negative correlation with Ca+Mg content and it is suggested that Fe content should be influenced by terrigenous cleposits.
DETRITAL MODES OF SANDSTONE, CHEMICAL COMPOSITIONS OF MUDSTONE AND STRATIGRAPHIC DIVISION OF THE PRE-TERTIARY SYSTEM IN THE HUANGHUA DEPRESSION
Li Jiangtao, Li Ling
1995, 17(1): 63-91. doi: 10.11781/sysydz199501063
Abstract(618) PDF-CN(313)
Abstract:
Based on the analysis of detrital modes of sandstone and chemical compositions of mudstone in Pre-Tertiary system in Huanghua Depression,it is suggested that there are some important differences in the types of sandstone or in the trace elements and chemical compositions of mudstones because of different geological time.The cluster analysis indicates that the samples in same sequence are clustered into one group while the samples in different sequences show poor interrelation.In this paper,the characteristics of detrital modes and chemical compositions of sandstone and mudstones of the Upper Paleozoic and Mesozoic are presented.In the same time,the strata in this area can be divided into several sequences,especially for the overlain red beds occurred during the different geological time.This method can contribute the unique effect in stratigraphic division.
AN APPROACH TO PERMEABILITY MEASUREMENT ON LOOSE SANDBODIES
Zhang Chunsheng, Lai Zhiyun, Cai Qiaoying, Tan Guohua
1995, 17(1): 72-76. doi: 10.11781/sysydz199501072
Abstract(579) PDF-CN(330)
Abstract:
This paper presents a method available for measuring permeability of modern sedimentary loose sandbodies with advantages of its direct measurement on field samples.The permeability of reservoir sandbodies obtained by this way could be fairly correlated with that measured on oilfield sandstone samples as the influence of diagenesis on reservoir is considered.Since the method can be carried out on simply equipped device with easy operation and reliable results,it is one of available techniques for the study of modern reservoir sandbodies.
ANALYSIS ON SHORT-CHAIN CARBOXYLIC ACIDS FROM OIL-FIELD WATER
Cheng Zhongdi, Ying Fengxiang
1995, 17(1): 78-80. doi: 10.11781/sysydz199501078
Abstract(666) PDF-CN(312)
Abstract:
In this paper,high pressure liquid chromatography(HPLC),ion chromatography(IC)and capillary electrophoresis(CE)are applied to analyze the anion(RCOO-)content and distribution of short-chain carboxylic acids(C1-C5 monoaiomic acid,C2-C6 biatomic acid)from oil-field water and the hydrothermal degraded solution of kerogens.HPLC method(ODS-C18column)is suitable for oil-field water,IC method(AS-1 Dionex column)for the degraded solution of kerogens while CE method(hollow capillary column)for the both kinds of samples with conventional concentration.The liquid samples only need to be through a filter film,being analyzed by direct injection of samples.Therefore,this method is simple and convenient with fair repeatability.
AN INTERVAL VELOCITY ANALYSIS AND LITHOLOGICAL PREDICTION IN THE LUXI DEPRESSION, INNOR MONGOLIA
Zha Ming, Zhang Weihai, Zhu Xiaomin, Lei Angui, Cang Ruibo
1995, 17(1): 81-88. doi: 10.11781/sysydz199501081
Abstract(643) PDF-CN(338)
Abstract:
On the basis of abundant data of seismic profiles and velocity spectra,the authors of this paper firstly calculated and analysed the seismic interval velocity and distributive characteristics in the upper Jurassic of the Luxi Depression,Innor Mongolia;then drafted the master curves of sandstones and mudstones in the area.Thereafter,the percentages of sandstones in various intervals are estimated by using acoustostratigraphic smooth and correlation of compactions.Based on the analysis of interval velocity and interpretation of lithology,the correlative relation among the velocity,seismic facies and sedimentary facies could be comfirmed and it would provide quantitative basis for prodicting favourable facies belts in the study area.
A DIRECT MEASUREMENT ON TRACE STRONTIUM AND BARIUM FROM ORGANIC SOLUTION WITH LIQUID PHASE NON-FLAME ATOMIC ABSORPTION SPECTROPHOTOMETRY
Xu Yang
1995, 17(1): 89-94. doi: 10.11781/sysydz199501089
Abstract(606) PDF-CN(244)
Abstract:
The paper introduces a direct measurement on trace metal elements of strontium and barium in organic liquid phase by atomic absorption spectrophotometry.Compared with an ash test,it is simpler and quicker,by which sample preparation can be greatly simplified,with an improved sensitivity and accuracy.
A LENEAR REGRESSION APPLIED TO PROCESSING THE ANALYTICAL DATA OF THERMALLY RELEASED MERCURY
Hang Yiping, Tian Shuyun, You Gexin
1995, 17(1): 95-98. doi: 10.11781/sysydz199501095
Abstract(808) PDF-CN(320)
Abstract:
The paper mainly describes the application of the linear regression method to processing the analytical data of thermally released mercury for chemical exploration.As the experimentaldata from all the sampling points in a measured area are taken into consideration,the functional expressions derived from the linear regression will completely reflect an overrall regularity for experiments,thereby distinguish the mercury geochemical anomaly.The method brings about far less error than that of Beer's law.
THE CHARACTERISTIC ANALYSIS ON GAS LOGGINGS OF THE TOP OIL/GAS BEDS, CARBONIFEROUS SYSTEM,IN MAI NO.3 WELL
Chen Jianfei
1995, 17(1): 99-103. doi: 10.11781/sysydz199501099
Abstract(572) PDF-CN(283)
Abstract:
The study illustrated logging analysis in a case when a drilling well has to be stopped by a technique accident after a thickness of only 1.01m is drilled down into the possible oil/gas horizons.In such a circumstance,the study affirmed the petroliferousness of a new exploratory region,by a full use of the measuring data from gas loggings.Moreover,these data can be significant either for a prospect evaluation,or as a compensation for the loss of drilling accident in potential evaluation of new oil/gas horizons in a new region.
1995, 17(1): 104-104. doi: 10.11781/sysydz199501104
Abstract(544) PDF-CN(281)
Abstract:

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