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01 December 1996, Volume 17 Issue 4 Previous Issue    Next Issue

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TWO-SIDED THEORY ON HYDROCARBON ORIGIN AND NEW CRITERIA FOR PETROLEUM EXPLORATION Zhang Kai 1996, 17 (4):  303-308.  Abstract ( 82 )   PDF (567KB) ( 230 )   Save In terms of oil- and gas-bearing plate tectonics, petroliferous basin, exploration target, giant oil/gas fields and accumulation belts and petroleum exploration programming, new criteria for petroleum exploration was discussed according to a view of plate tectonic cycle and crust-mantle inorganic hydrocarbon origin and the 3-D model of superposition and enrichment of multiple inorganic and organic sources. New criteria fully reflect the fact that two kinds of hydrocarbon origins exist concurrently, compared with the old criteria simply based on organic origin theory, thereby gaining more from its application in exploration practices. References | Related Articles | Metrics

FLUID POTENTIAL SIMULATION AND HYDROCARBON MIGRATION IN NORTHERN TARIM BASIN Qian Xiaojun 1996, 17 (4):  309-313.  Abstract ( 79 )   PDF (358KB) ( 204 )   Save Based on the basic principle on fluid potential simulation during the study on hydrocarbon migration in the petroliferous basin, this paper gives its core equation—overpressure equation, and discusses its geological significance. Moreover, case study is made and the result analysed in northern Tarim basin. Finally, the relation between fluid potential distribution and hydrocarbon migration is discussed. References | Related Articles | Metrics

ANALYSIS OF DEEP GEOLOGICAL STRUCTURES IN SOUTHEASTERN TARIM BASIN AND ALTON AREA Lu Xinbian, Shi Yan, Tian Chunlai, Wu Yangang 1996, 17 (4):  314-317.  Abstract ( 93 )   PDF (512KB) ( 246 )   Save According to 1: 500 000 gravity data, the Moho-discontinuity depth is calculated, resulting in knowldge of the distribution of crustal thickness in southeastern Tarim basin and Altun area. The relations between deep structures in southeastern Tarim basin and Altun uplift are discussed based on geological structure of deeper lithosphere from magnetotelluric depth (MT) section across Altun mountain. References | Related Articles | Metrics

PROSPECT FOR CONTROLLING HYDROCARBON BY MULTISTAGE UNCONFORMITIES IN TARIM BASIN Chen Ziyuan 1996, 17 (4):  318-321.  Abstract ( 89 )   PDF (330KB) ( 218 )   Save Undeveloped faulting and local structures in Tarim basin suggest that it has stability and substained subsiding features, which are favourable for source rock preservation rather than hydrocarbon migration and accumulation in the basin, we should devote more attention to the transporting and controlling effects of unconformities on hydrocaitx)n to find out additional petroliferous provinces. Among the main five-stage unconformities, these zones, such as tnmcated zone, multistage unconformity stacked zone, multistage pinch-out concentrated zone and nwvable pnc^ressive unconformable zone that resulted from sedimentation of the foreland basin, are all favourable plays for hydrocaAon accumulation. References | Related Articles | Metrics

DISTRTOUTION OF STRESS FIELD IN X3AZIJIE RESERVOIR (PERMIAN) IN XIAOGUAI OILFIELD Lei Jingsheng, Li Shuliang, Somg Zhili, Jia Guolan, Chen Dayong, Nie Zhenrong 1996, 17 (4):  322-326.  Abstract ( 105 )   PDF (506KB) ( 209 )   Save The distribution of triaxial stress and fracture in Xiazijie reservoir (Permian) in Xiaoguai oilfield has been studied with manifold methods, and the results were applied in oilfield development planning such as well pattern, injection-production mode, horizontal well orientation and fracturing design etc.. References | Related Articles | Metrics

RESERVOIR PREDICTION WITH SEISMIC MODEL Li Xiaoci, Xiang Hui 1996, 17 (4):  327-330.  Abstract ( 92 )   PDF (485KB) ( 187 )   Save In Order to search for an effective method of reservoir prediction, the stratigraphy seismic model was established by using data of Jurassic in Cainar oilfield, and applied in simulation of seismic response and analysis of simulated reflection characteristics. According to the analysis of forward modelling, reflector characteristics and spectral properties, it is considered that the seismic model based on actual data can be used in reservoir prediction. Combination of spectral proj>erties and its geometric interpretation of seismic wave can improve seismic information utilization and interpretation accuracy. References | Related Articles | Metrics

STUDY ON COAL-BED METHANE POTENTIAL IN SOUTH MARGIN OF JUNGGAR BASIN Ding Anna, Hui Rongyao, Duan Yi, Zhang Zhongning 1996, 17 (4):  331-337.  Abstract ( 97 )   PDF (664KB) ( 286 )   Save On the basis of the study on distribution of coal bed,coal maceral characteristics, coal-bed methane show and its geochemical as well as adsorbed hydrocarbon amounts, this paper reviews the favorable formation coditions and exploration area for coal-bed methane in south margin of Junggar basin. References | Related Articles | Metrics

CARBONATE SEDIMENTARY FACIES AND SEA-LEVEL CHANGE IN EARLY ORDOVICIAN IN TABEI UPLDT Guo Jianhua 1996, 17 (4):  338-345.  Abstract ( 68 )   PDF (739KB) ( 221 )   Save Lower Ordovician caAonate in Tabei uplift can be distinctively divided into two types of facies belts: shallow-water caibonate plateform in the west and deep-water carbonate slope-basin in the east - The former is dominated by tidal flat facies, and the latter is obviously controlled by the tectonic setting of the passive continental margin at the eastern margin of Tarim massif. Carbonate sedimentary facies model correlates well with Tucker model. Lower Ordovician depositional cycles are abundant and regionally correlated indicating its dependence on sea-level change. Frequent short-time exposure at the top of the depositional cycle resulted in the formation of vugular-pore in carbonate deposits subjected to leaching and dissolution of meteoric fresh water. However, such pores were influnced and reworked in late diagenetic stage. References | Related Articles | Metrics

STUDY ON SEQUENCE STRATIGRAPHY OF MESOZOIC - CENOZOIC IN TABEI UWLIFT Fan Xuewen, Wan Liao, Shi Weidong 1996, 17 (4):  346-349.  Abstract ( 71 )   PDF (491KB) ( 223 )   Save Sequence and system tract were divided in Jurassic, Cretaceous, Paleogene and Jidike formation of Neogene in Tabei uplift based on sequence stratigraphy principle and its study method. Four sets of reservoir rocks, i. e. sandstone at the bottom of Jurassic, extensive Cretaceous sandstone, sandstone at tlie bottom of paleogene and sandstone at the bottom of Jidike formation, and two sets of salt-gypsum caprocks, i. e. Lower Paleogene salt-gypsum bed and salt-gypsum bed of Jidike formation were emphaticliy studied, including determination of their extent, proper interpretation of their sedimentology, valid assessment of reservoir-caprock assemblage, and selection of favorable exploration area and target. References | Related Articles | Metrics

SEDIMENTARY SYSTEM AND FACIES OF CARBONIFEROUS - PERMIAN IN WESTERN TARIM BASIN Deldar 1996, 17 (4):  350-357.  Abstract ( 131 )   PDF (752KB) ( 28 )   Save The evolution characteristics of sedimentary system and facies of Carboniferous - Permian in western Tarim basin were systematically analysed on the basis of more than thirty outcrop sections, along with drilling and seismic data. It is suggested that Carboniferous ~ Permian is a complete pericxi of transgression - regression cycle, where carbonate and clastic rock amalgamated in early period of transgression and late period of regression. Tliree sedimentary systems were divided regarding Carboniferous - Permian： Lower Carboniferous(including lower part of Lower Permian in very few areas) amalgamated continental shelf; Upper Carboniferous - lower Lower Permian carbonate platform, and upper Lower Permian - Upper Permian terrestrial clastic, sedimentary facies maps of seven periods were made. An attempt to reconstruct paleotemperature and paleogeography settings was made according to the experimental results of carbon and oxygen isotope, and trace element. References | Related Articles | Metrics

DATING OF SUBSURFACE BACHU FORMATION AND DONGHE SANDSTONE INTERVAL IN TABEI UPLIFT Zou Yisheng 1996, 17 (4):  358-362.  Abstract ( 110 )   PDF (562KB) ( 275 )   Save Correlating the subsurface Bachu formation with outcropped Bachu formation in Tabei uplift,it is considered that three sequences of subsurface Bachu formation deposited in Tounaisian period of Early Carboniferous, equivalent to the interval from outcropped upper Bachu formation to Kalasayi formation and the bottom of Xiaohaizi formation, while outcropped Bachu formation deposited in early Tounaisian period of Early Carboniferous. Donghe sandstone interval is considered to be a part of Upper Devonian. References | Related Articles | Metrics

STUDY ON THE WATER DISPLACEMENT CURVES—the 1st in series Yu Qitai 1996, 17 (4):  364-369.  Abstract ( 72 )   PDF (393KB) ( 288 )   Save Related Articles | Metrics

NEW METHOD FOR ESTABLISHING HYPERBOLIC DECLINE EQUATION OF FIELD PRODUCTION Zhang Hujun 1996, 17 (4):  370-375.  Abstract ( 95 )   PDF (361KB) ( 230 )   Save This paper analysed every solving method of Arps Hyperbolic decline equation, pointed out their respective shortcomings, and then presented a new method which solves equation. This method requires only a simple one-place linear regression and a summing operation, avoiding artificial influnce. It has a single solution and easy to operate. It should be noted that this method will give worse results with non-smothing data. In such cases, the original data should be smothed to obtain the expected results. References | Related Articles | Metrics

A NEW MODEL FOR PREDICTING OILFIELD PRODUCTION Liu Bin, Zhao Ming 1996, 17 (4):  376-379.  Abstract ( 74 )   PDF (359KB) ( 150 )   Save Based on applied mathematics and actual data of oilfield, a new model for predicting oilfield production was presented, which is applicable at both stable production stage and decline stage of oilfield. Case study showed that it is a simple and valuable method characterized by rapid calculation and high accuracy. References | Related Articles | Metrics

STUDY ON SEALING CAPACITY OF SHALE CAPROCK OF CARBONIFEROUS IN CANTRAL TARIM BASIN Fu Guang, Chen Zhangming, Wan Longgui 1996, 17 (4):  380-384.  Abstract ( 95 )   PDF (524KB) ( 282 )   Save The shale of Carboniferous in central Tarim basin, the regional caprock overlying the oil/gas reservoir in buried hill of Lower Ordovician and Carboniferous, possesses three kinds of sealing mechanisms(physical sealing, pressure sealing and hydrocarbon concentration sealing) and plays an important role in oil/gas accumulation and preservation in the area of interest. Its comprehensive evaluation in this paper is based on the synthetic weight calculation from weighted averaging of different values which are set to different ranks of its seal capacity classified with major evaluation parameters following systematic analysis of its macroscopic and microscopic seal characteristics. Results showed that it has good-medium sealing capacity. References | Related Articles | Metrics

FUZZY GENERALIZED ASSESSMENT OF RESERVOIR QUALITY VIA NEURAL NETWORKS Ran Qiquan, Li Shilun 1996, 17 (4):  385-390.  Abstract ( 72 )   PDF (516KB) ( 215 )   Save Fuzzy generalized assessment method is combined with neural network technique. Self-teaching mechanism of neural network is introduced into fuzzy generalized assessment method to calculate the weights of variables. In such case, the weights determined are of theoretical and practical values and fuzzy method becomes more mature. References | Related Articles | Metrics

FRACTAL CHARACTERISTICS OF PORE STRUCTURE IN TRIASSIC CONGLOMERATE RESERVOIR IN KARAMAY OILFIELD Yue Xinjian, Liu Shunsheng 1996, 17 (4):  391-395.  Abstract ( 79 )   PDF (352KB) ( 260 )   Save The study on fractal dimension of pore structure in Lower Karamay formation conglomerate reservoir of Tnassic in Karamay oilfield has been made by means of MIFA method for calculating fractal dimension of sandstone pore structure presented by Mr. Shen Pinning and Mr. Li Kewen, it is concluded that pore structure in Karamay conglomerate reservoir has fractal characteristics, the complexity of pore structure can be quantified by fractal dimention of pore structure, and fractal dimension is closer to 2, pore surface is smoother, reservoir quality is better. Otherwise, reservoir quality becomes worse. References | Related Articles | Metrics

COMPOSITION OF AMINOACID IN HEAVY OILS AND THEIR EMULSION PROPERTY IN DISTRICT NO.9 OF KARAMAY OILFIELD Zeng Zhaohuai, Wu Yihua, Yin Mingshan, Zuo Xiujuan, Chen Ruxi 1996, 17 (4):  396-398.  Abstract ( 117 )   PDF (357KB) ( 174 )   Save Total content of aminoacid in Ke A heavy oil and Ke B heavy oil in Distnct No. 9 of Karamay oilfield is measured at 11.6 g/kg and 74. 1 g/kg, respectively. Interaction between mixture of aminoacid fraction and non-emulsified fractions in same heavy oil sample and alkaline solution can cause increse in interfacial tension of system. References | Related Articles | Metrics