石油实验地质

THE OIL/GAS POTENTIAL CALCULATED BY MATERIAL BALANCE AND THE APPLICATION IN GEOLOGY

Li Wenguo

1988, 10(1): 1-11. doi: 10.11781/sysydz198801001

Abstract(496) PDF-CN(342)

Abstract:
The calculations of oil/gas potential of various types of organic matter are discussed in this paper. Based on material balance law of chemical reaction and organic origin of oil/gas, the total sum of oil/gas, water, carbon dioxide, and nitrogen generated from the kerogen plus the residual kerogen should be equal to that of tne initial Kerogen. The analysis in this paper illustrates that oil/gas potential calculated by material balance almost coincides with the result of experimental simulations with a variance less than 5% and it can meet the needs of geological researches and explorations of petroleum.

THE FORMATION AND DEVELOPMENT OF PALEO-UPLIFT IN CENTRAL SICHUAN AND ITS OIL/GAS PROSPECT

Kang Yichang

1988, 10(1): 12-23. doi: 10.11781/sysydz198801012

Abstract(490) PDF-CN(380)

Abstract:
In this paber,the recent data from wells, regional seismic profile and regional geology have been integrated and it is concluded that the Paleo-uplift is developed through-out geological history. This nose form paleo-uplift is a structural erosion uplift with Ew trend formed during Caledo-nian movement and subsequent Devonian-Carboniferous uplifting. Thereafter, it turned to near NEE trend during Indosinian time and continued to the time of Yanshanian and Xishanian. There are plenty of gas source rocks in the uplift area and there are five sequences where the abundance of organic carbon is computed to be 2 Mt/Km², mainly attributed to Lower Paleozoic and Tengyin Formation(Zn),and some to Permian systems.Based on the resource prediction,the resources of Lower Paleozoic marine facies sequences are of 72 percent of the total resources in the area. The regional sealing condition is excellent for the Paleo-uplift and its top erosional fault plane during the peak stage of oil/gas generation in Indosinian time without any influence of Sichuan movement. The traps in the area can be divided into four types: the reservoir related to deposition, the traps related to the control of paleo-erosional plane, gas pool formed in early stage influenced by regional paleo-uplifting and paleo-structure, and various traps formed in late stage of folding and fanlting. Finally, the possible reservoir types and their oil/gas prospects are made for different locations of the paleo-uplift.

FOLDED FAULT AND ITS RELATIONSHIP TO THE THRUSTED NAPPE STRUCTURE IN NINGZHENG AND MOUSHAN AREAS

Huang Zhongjin, Shen Xiuzhi, Sun Yan, Du Dingquan

1988, 10(1): 24-32. doi: 10.11781/sysydz198801024

Abstract(526) PDF-CN(331)

Abstract:
In this paper, several folded faults are analysed in Ningzheng and Moushan Areas, Jiangsu Province, and they can be classified into following types based on their configurations: anticlinal fault, synclinal fault and complex fault. All those faults were formed under the control of folding or continuosly folding with the mechanism of thrust-nappe structures. The principal markers of such faults are of the occurrence of nappe-outlier and nappe-inlier, abrupt turning of fault line, steep flanks at both sides of the fault with small angles at the top of anticlines. The decouples of the fault plane would easily be formed at the top of anticlinal fault during folding and the fault plane can be acted as sealing if oil/gas generation conditions are favourable. So that the top of the anti-clinal fault would be favourable for the preservation of oil/gas accumulation while the type of anticlinal fault can be a new type of oil/gas trap-structure.

THE REPRODUCTION OF PALEO-STRUCTURE AND THE ESTABLISH OF EQUILIBRIUM PROFILE FOR EXTENSION STRUCTURE AREA——An Example of Bohai Gulf Basin

Liu Chiyang

1988, 10(1): 33-43. doi: 10.11781/sysydz198801033

Abstract(536) PDF-CN(407)

Abstract:
The severe denudaticn and reworks in Bohai Gulf Basin changed the geometric configuration, the rock volume, and the formation distribution of fault blocks.In addition, the occurrence of Cenozoic extension associated with shearing deformation in the basin changed the total rock area of the profile which meets the structure line at right angle. The two factors mentioned above would directly influence the quality of paleo-structure reproduction. Taking Bohai Gulf Basin as an example, the author of this paper suggested the analysis on geological reproduction combined with geometric mapping based on geological characters of extension-structure regions. Such a kind of analysis would take non-rigid tilting fault blocks as subjects and reconstruct the initial configurations of various fault blocks by reproducing the denuded rock volume without subsequent reworks of structural deformation. Thereafter, the paleo-structures would be progres-sively reprepoduced following the sequence of fault block, longitudinal section, cross-section, space and timing. Thus, the reproduction of Paleo-structural configuration in the structural extension regions Can be made, the amount of extension is quantified and the equilibrium profile can be established with good quality.

SPOROPOLLEN ASSEMBLAGE IN LATE PALEOZOIC COAL SERIES OF DANGSHAN, ANHUI PROVINCE

Lu Yanban, Yuan Xiurun

1988, 10(1): 44-52. doi: 10.11781/sysydz198801044

Abstract(504) PDF-CN(255)

Abstract:
Liang-Huai Region in Anhui province is one of the important coal bases of China. Abundant sporopollen fossils were found in core samples of well H210 and well H013 taken from Liangzhai, Dangshan, which provide the basis for stratigraphical division of that region. According to the chara-cteristics of sporopollen assemblages, Permo-Carboniferous system of that region could be divided into Benxi Group, Taiyuan Group, Lower Shihezi Group and Upper Shihezi Group. In addition, the disputed boundary between upper and lower Shihezi groups put here on the bottom of thick quartz sands between FFO13-18 and FFO13-20.

DIRECT OBSERVATION ON POROUS TEXTURE BY POROSITY CASTING IN CARBONATE ROCKS

Sun Tuo, Lin Wanxiang

1988, 10(1): 53-59. doi: 10.11781/sysydz198801053

Abstract(393) PDF-CN(305)

Abstract:
The authors of this paper use their own made porosity casting filler and filling equipment and prepare four types of porosity casts represent-ing good, ordinary, poor and very poor carbonate rocks from some typical sequences in Sichuan Area. Subsequently, the observations and analysis are carried out on reservoir rocks and integrated studies are made on the quality markers of the reservoir rocks. The direct observations of the porosity castings can illustrate the assemblage between the different porosites. Combined with the data of porous texture, it can evaluate the quality of reservoir rocks and provide scientific basis for reservoir analysis.

INFRA-RED SPECTRA ANALYSIS FOR CLAY MINERALS OF KAOLINITES

Yang Zhiqiong, Zhao Xinyuan, Zhang Ling

1988, 10(1): 60-66. doi: 10.11781/sysydz198801060

Abstract(493) PDF-CN(779)

Abstract:
Based on the characteristics absorption of Infrared spectra and the Intensity differences of absorption for OH groups in high frequency range, qualitative and quantitative analysis for clay minerals of kaollnites were made. It is thought the method of Infrared absorption spectra is more time-saving and more accurate, as comparing with X-ray diffraction. Furthermore, the interference from chlorite can be eliminated. It is particularly appliable to the samples of low content (10%minor).

HIGH-PERFORMANCE RAPID CHROMATOGRAPHY——TLC Mesh Column Chromatography

Li Yulin

1988, 10(1): 67-71. doi: 10.11781/sysydz198801067

Abstract(621) PDF-CN(289)

Abstract:
TLC mesh column chromatography is a new typed column chromao-graphy, which is based on the principles of high performance liquid chromatography. It shows several advantages over conventional column chromatography, i.e. high speed, high resolution, simplicity of equipment and easy operation. It is available to ordinary laboratories. Detailed informations such as laboratory device, packing materials, eluants, column fillings and injection methods are given in this paper.

PRESSURIZED AND HEATED SIMULATION ON COALIFICATION OF BROWN COAL AND ITS SIGNIFICANCE

Li shengjie

1988, 10(1): 72-79. doi: 10.11781/sysydz198801072

Abstract(445) PDF-CN(410)

Abstract:
Taking brown coal samples from shulan, Jilin Province, the author made simulated experiments of coalification on special designed source rock pyrolizer. The product yields at various temperature gradients of simulation, and the characteristics of gas and liquid components, and their changing patterns were systematically analysed and studied.

ANALYSIS AND APPLICATION OF INFRA-RED SPECTRA FOR KEROGEN

Ruan Jinshui, Bai Wei

1988, 10(1): 80-86. doi: 10.11781/sysydz198801080

Abstract(461) PDF-CN(310)

Abstract:
The author applied infrared spectral to kerogen study. In this paper, following topics were discussed. 1) Relationship between major absorption bands from high frequency to low frequency and chemical structures. 2) Infrared absorption characteristics for kerogens derived from different precursor. 3) Infrared absorption characteristics of thermal simulations at Various heating temperatures and its relation with the functional groups.

DATA PROCESSING TOWARD KNOWLEDGE PROCESSING ——A Discussion on ‘the Second Wave’ of Mathematical Geology

Ding Taimu

1988, 10(1): 87-94. doi: 10.11781/sysydz198801087

Abstract(565) PDF-CN(274)

Abstract:
Can computers do the job as geologists do by a mode of thinking, judging and reasoning? This is an important goal which mathematical geologi-sts are seeking for. As viewed with new informations combined with the characters of geological science and the recent developments in mathematical geology at home and abroad, the author of this paper describes the reasons why'the artificial intelligence' is introduced into the researches of mathe-matical geology, It emphasizes to open up a frontier for the quantification of geologist intelligence and weed through recent data processings to bring forth the knowledge processings. It is proposed that we are coming into the time of ‘Second Wave' of mathematical geology. Based on the developments of geologist intelligence in mathematical geology, i.e. the combination of precision in value quantification with the activated thinkings, it will provide a flexible solution for the complicated researches of geology in wider and profound degree. Finally, the introduction is briefly made on the expert system and PROLOG language, so that it will help to keep abreast current developments in geology at home and abroad.

1988 Vol. 10, No. 1

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