石油实验地质

ON THE ORIGIN OF THE NATURAL GAS IN THE NORTHERN TARIM BASIN

Qian Zhihao, Chen Zhenfu

1992, 14(3): 217-226. doi: 10.11781/sysydz199203217

Abstract(505) PDF-CN(295)

Abstract:
The authors of this paper study the original types of the natural gas in the Northern Tarim Basin on the basis of the carbon isotopic data of light hydrocarbons C₆～C₇ and their chemical compositions. At the sametime,it is proposed the original types and the discriminating criteria, such as maturity etc. for the natural gas in the Northern Tarim Basin.

THE DIAGENESIS OF 7CHE SANDSTONE RESERVOIR IN THE JURASSIC—CRETACEOUS SYSTEMS OF THE HAILAER BASIN

Lin Zhongqian

1992, 14(3): 227-235. doi: 10.11781/sysydz199203227

Abstract(474) PDF-CN(333)

Abstract:
This article deals with various diagenesis which are closely related to the development of pores in the Jurassic-Cretaceous sandstone reservoirs. Through the analysis on a large number of cast thin-sections of cores in the Hailaer Basin and many measurements of cath-doluminence, electronic micro-probe, SEM EDX, isotope etc., the criteria for the recognition of diagenesis caused by meteoric water apd freshwater have been discussed in this paper. Furthermore, the diagenetic sequences are reconstructed in the terms of differentiated diagenesis patterns. Therefore, it is the both theoretic and practical significance to study the burial history of basins, the evolution of pores and reservoir development.

ANALYSIS ON THE DEFORMATION OF THE LINKED THRUSTING SYSTEM IN THE HUAINAN REGION, ANHUI PROVINCE

Zhu Zhongpei, Chai Minli

1992, 14(3): 236-243. doi: 10.11781/sysydz199203236

Abstract(641) PDF-CN(228)

Abstract:
The Huainan Linked Thrusting System consists of a series of south-dipping thrusts and overthrusts with near-EW strike. The certain functional relations exist between the shortening and the relative expanding rate of thrustings along the basement plane, the sliding rate and the depth of dissection. Although it is difficult to get numerical solution up to date, the sheet strain and the characters of the structural strain can be illustrated by graphic solutions. Consequently, the maximum depth of the basement and the shortening of sedimentary sequences could be estimated. In addition, the graphic solution can suggest the relationship between the style of thrusting expansion and the mechanic property of rocks. Forthermore, the explanations of the tectonic significance could be described for the Huainan Linked Thrusting System.

THE ORIGIN OF MUDCONE AND ITS RELATION TO THE OIL/GAS IN THE YINGGE SEA BASIN

Zan Lisheng, He Jiaxiong

1992, 14(3): 244-251. doi: 10.11781/sysydz199203244

Abstract(506) PDF-CN(287)

Abstract:
The seismic reflections of T₂-T₆ in the depocenter of the Yingge Sea Basin are of thick argillite sequences with rich organism. Since the organic matters in the sequences have been buried at depth over 3250m, i. e the oil/gas generating threshold,they are already transformed into hydrocarbon and the oil/gas accumulation occurred under the high pressure/high temperature in the argillite sequences. Because of the coarse grained-granules deposited at the margin of the basin and their downslidings along the basement towards the depocenter, it brought about lateral compression. Consequently, the thick argillite sequences in the depocenter upwarped along the vertical fractures and faults and the mudlump diapirism caused the formation of mudcone structures. The trap structures developed in the sequences of T₂-T₆ reflections at the both flanks of the mudcone and its top part could trap the oil/gas generated from source rocks and the hydrocarbon released during the stage of mudlump upwarping, being formed into oil/gas pools.

METHODOLOGY AND APPLICATION OF DIRECTSIMULATION ON THE HYDROCARBON EXPULSION

Li Mingcheng, Qin Ruozhe, Ma Shuanming

1992, 14(3): 254-258. doi: 10.11781/sysydz199203254

Abstract(539) PDF-CN(291)

Abstract:
Applying the direct-simulation on hydrocarbon expulsion, the authors of this paper study the hydrocarbon expulsion and the expulsion rate in a certain depression of the Bohai Gulf Region. Furthermore, the main characteristics of hydrocarbon migration have been studied in this paper.

ON THE RELATIONSHIP BETWEEN THE COMPACTION OF ARGILLITES AND PETROLEUM MIGRATION IN THE YING-QIONG BASIN

He Jiaxiong, Zan Lisheng, Liang Kerning

1992, 14(3): 259-271. doi: 10.11781/sysydz199203259

Abstract(656) PDF-CN(333)

Abstract:
Focusing on the relationship between the characteristics of argillite and petroleum migration, the authors have studied and discussed the regularity between argillite compaction and the primary migration of oil/gas within the basin, on the basis of the data of a-coustic time and fluid pressure. It is suggested that low pressure zones or hydrostatic pressured zones are the orientation prefered by petroleum migration and accumulation, and therein the areas of petroleum enrichment. Pressure seals formed in the abnormal high-pressured zones are considered as important factors for the formation of gas pools while the release and disappearance of the pressure in the abnormal high pressured zone during argillite compaction and expansion caused by hydrocarbon generation are the driving forces for the primary migration.

APPROACH TO GENERATION, MIGRATION AND ACCUMULATION OF OIL AND GAS IN THE SIKESHU DEPRESSION, THE JUNGGAR BASIN

Kuang Jun

1992, 14(3): 272-281. doi: 10.11781/sysydz199203272

Abstract(801) PDF-CN(294)

Abstract:
The Sikeshu Depression initiated its subsidence from the Jurassic and the most severe subsidence occurred in Neogene. Two suites of source beds, i. e the Jurassic coal series and the sequences of the Anji and the Hehai formations of Eogene are developed, of which the Jurassic coal series is widely spreaded with a great thickness and richness of organic matter, and high levels of thermal evolution, being considered as a major contributor to hydrocarbons in the area. However, migration is oriented to the Tuositai Region and the Dushanzi Anticline. The various types of traps occurred in the former and the deep-seated traps in the lattter are favourable places for hydrocarbon accumulation.

DISCUSSION ON THE INFLUENTIAL FACTORS OVER THE QUALITY OF NATURAL-GAS CAPROCKS AND THE TIME OF THE CAPROCK FORMATION

Li Xuetian, Zhang Yigang

1992, 14(3): 282-290. doi: 10.11781/sysydz199203282

Abstract(626) PDF-CN(220)

Abstract:
Based on the experimental analysis of caprocks and reservoir rocks of natural gas, the authors of this paper study the influential factors over the quality of natural-gas caprocks and the time of their formation in the Jiyang Depression. The analysis data of the mineral compositions of argillites reveal that the quality of natural-gas caprocks is dominated by sedimentary environment, compaction and diagenesis levels of argillites.Furthermore, the experimental analysis on the expulsion pressure and the breaking pressure of the reservoir rocks suggest that the caprocks could be taken as capping beds as the suffient sludges deposit and become stratified sequences.

ON THE ORIGIN OF PAGODA STONES IN THE SHIQIAN REGION, GUIZHOU PROVINCE

Zhou Shuxin, Wang Jiangguo

1992, 14(3): 291-295. doi: 10.11781/sysydz199203291

Abstract(566) PDF-CN(398)

Abstract:
On the concavo-convex bedding plane of the pagoda stones within the Baota Group of Middle Ordovocian systems in the Shiqian Region of Guizhou Province, the network-filled fissures consist of two sets of intersected sutures which form a pagoda-shaped structure. Their lithology can be attributed to limestones with bioclasts and clay. It is believed that the pagoda stones deposit under the subtidal environment of limited sea area on the basis of geochemical characters. The pagoda structure is irrelevant to the mapcracking of evaporation. However,it is suggested that the pagoda structure is a product of diagenesis. Since the differential compactions which exist between lime-mud and clay laminaes, in addition to deep-pressure solution, it would bring about the, development of two sets of suture lines.

ON THE FORMATIVE MECHANISM OF THE ANOMALY HIGH-PRESSURE IN THE CARBONATE ROCK SYSTEM OF THE SICHUAN BASIN

Du Fengqin

1992, 14(3): 296-301. doi: 10.11781/sysydz199203296

Abstract(562) PDF-CN(384)

Abstract:
The author of this paper describes the anomaly high-pressure in the Triassic and the Permo-Carboniferous systems based on the features of the carbonate diagenesis combined with the geological structures, sedimentary characters, petroleum evolution and the exploration practice in the Sichuan Basin. It is concluded that the high-pressure results from various geological actions during the stage of petroleum generation, migration and accumulation in the basin.

A SERIES OF ON-LINE CARBON ISOTOPIC ANALYSES OF MONOSOMERIC HYDROCARBONS IN CRUDE OIL BY GC/C/MS

Zhang Wenzheng, Pei Ge

1992, 14(3): 302-311. doi: 10.11781/sysydz199203302

Abstract(564) PDF-CN(282)

Abstract:
The method of on-line carbon isotopic analyses by GC/C/MS, on a gaseous isotopic spectrometer modelled GC-delta S, is systematically introduced. It allows for more accuracy and precision and a large amount of carbon isotopic data of monosomeric hydrocarbons derived from different samples of mixed hydrocarbons, and provides plenty of scientific information for petroleum geochemistry.

A SIMPLIFIED MEASUREMENT OF K-V ANALYSIS

Zhou Jinnan

1992, 14(3): 312-317. doi: 10.11781/sysydz199203312

Abstract(597) PDF-CN(242)

Abstract:
The paper introduces a simplified measurement of K-V analytical method, by using which the pyrolytically released hydrocarbons can be quantitatively analysed with chro-matogram in sections. Therefore, it would simplify the procedures of analyses and improve the subsequent data process.

PETROLEUM CARBON IN CHEMICAL EXPLORATION OF OIL/GAS AND ITS DETERMINATION

Yue Fulin

1992, 14(3): 318-321. doi: 10.11781/sysydz199203318

Abstract(503) PDF-CN(237)

Abstract:
The author made an objection to the geological term of altered carb6nate in oil/gas exploration, henceforth, it is suggested a new terminology with more exactness in connotation, i. e. petroleum-carbon. The contribution of petroleum-carbon to chemical exploration of petroleum along with a rapid and accurate determination is also presented in the paper.

1992, 14(3): 322-322. doi: 10.11781/sysydz199203322

Abstract(431) PDF-CN(292)

Abstract:

1992 Vol. 14, No. 3

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