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2004 Vol. 26, No. 2

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2004, 26(2): 113-114. doi: 10.11781/sysydz200402113
Abstract(617) PDF-CN(399)
Abstract:
CHARACTERISTICS OF PETROLEUM GEOLOGY IN THE SICHUAN BASIN——COMMEMORATING MR. HUANG JIQING’S 100TH BIRTHDAY
WANG Jin-qi
2004, 26(2): 115-120. doi: 10.11781/sysydz200402115
Abstract(752) PDF-CN(635)
Abstract:
This paper first expounds the Polycycle Theory of Mr.Huang Jiqing related to oil and gas in the Sichuan Basin,then enumerates the development and characteristics of 6 great cycles.It confirms that,the principal contradiction of oil and gas in Sichuan is seriously tight reservoirs,and the research on fractures and looking for porous reservoirs are two paths we must follow.Due to the reservoirs deep buried and supertight,natural gas is dominant in the Sichuan Basin,with the characteristics of early accumulation and late trap.This paper simply discusses the problem of oil resource.With advanced technique will the petroleum potential of Sichuan Basin be fully released.
RETHINKING ABOUT THE TECTONIC EVOLUTION OF THE CENOZOIC CONTINENTAL MARGINAL BASIN OF THE WEST PACIFIC OCEAN IN ACCORDANCE WITH SOME IMPORTANT ADVANCES OF STUDIES OF PETROLEUM GEOLOGY IN EAST CHINA SEA——AN EVOLUTIONARY MODEL OF RESIDUAL BACK ARC BASINS DEVELOPED IN THE LOCATION OF TRENCHES RETREATING TOWARDS THE OCEAN
SUN Zhao-cai
2004, 26(2): 121-137. doi: 10.11781/sysydz200402121
Abstract(618) PDF-CN(563)
Abstract:
Asia is the most complicated continent in the view of global geological tectonics.There is not only mosaic structures consisting of small blocks and giant orogenic belts,but also modern continental margin with trenchs,island arc and basins lasting for 20 000 km.Chinese geologists,presented by Academian Huang Jiqing and Zhu xia,elaborated the geological tectonics of China by theories of "polycycle","three tectonic domains (PaleoAsian,marginal-Pacific and Tethyan-Himalayan tectonic domains)"and "two frontal lines both in west and east".Under the light of their theories,the tectonic evolution of continental margin of west Pacific ocean and the development of basins in the area were studied with the idea of "trench retreating towards ocean and residual backarc basins",which was in accordance with some important advances of studies of petroleum geology in East China Sea.
RELATION OF MULTICYCLES TO OIL AND NATURAL GAS IN THE ORDOS BASIN
ZHANG Fu-li
2004, 26(2): 138-142. doi: 10.11781/sysydz200402138
Abstract(631) PDF-CN(621)
Abstract:
With history and construction analysis,Prof.Huang Jiqing and other geologists founded "multicycle tectonic movement theory",after long-term research on Chinese earth structure.This theory summarized the basic characteristics of Chinese earth structure,developed the multicycle theory,enriched the theory and research method of Chinese earth structure,and made great contribution in directing national oil and gas prospection.On the occasion of Prof.Huang Jiqing's 100th birthday,the author reviews the oil and gas achievements acquired under the multicycle theory and the further analysis on oil-gas geologic condition of the basin,generation and distribution of oil-gas,and the oil-gas exploration decision during the 50 years' oil-gas exploration in the Ordos Basin,expressing honor and cherish memory for the older generation of geologists.
MATCHING MODE OF NORTH CHINA AND YANGTZE PLATES AND STRAIN CHARACTERISTICS OF THE PALEOZOIC BASIN IN THE NORTH EDGE OF THE YANGTZE PLATE
JI Rang-shou, GAO Chang-lin, QIN De-yu
2004, 26(2): 143-152. doi: 10.11781/sysydz200402143
Abstract(884) PDF-CN(574)
Abstract:
With history and construction analysis,Prof.Huang Jiqing and other geologists founded "multicycle tectonic movement theory",after long-term research on Chinese earth structure.This theory summarized the basic characteristics of Chinese earth structure,developed the multicycle theory,enriched the theory and research method of Chinese earth structure,and made great contribution in directing national oil and gas prospection.On the occasion of Prof.Huang Jiqing's 100th birthday,the author reviews the oil and gas achievements acquired under the multicycle theory and the further analysis on oil-gas geologic condition of the basin,generation and distribution of oil-gas,and the oil-gas exploration decision during the 50 years' oil-gas exploration in the Ordos Basin,expressing honor and cherish memory for the older generation of geologists.
CHARACTERISTICS OF OIL GENERATION IN COMPRESSIONAL SUPERIMPOSED BASINS IN NORTHWEST CHINA
KANG Yu-zhu
2004, 26(2): 153-160. doi: 10.11781/sysydz200402153
Abstract(608) PDF-CN(487)
Abstract:
The area of northwest China is 260×104km2 and more than 100 oil and gas fields have been discovered in the area.It has rich hydrocarbon resource.The characteristics of oil generation in compressional superimpositional basins were summarized after tens years of exploration and study.They are Characte-rized by polycyclic evolution,complicated tectonic deformation,multiple-age source rocks,multiple combinations of reservoirs and seals,multistage accumulation,and unique properties and distribution of oil and gas fields.
KURUKTAG UR-OCEAN RIFT AND MANTLE PLUME IN THE TARIM BASIN
GAO Chang-lin, YE De-liao, HUANG Ze-guang
2004, 26(2): 161-168. doi: 10.11781/sysydz200402161
Abstract(660) PDF-CN(521)
Abstract:
A hot mantle plume,i.e.the one in between of continental rift and oceanic spreading,indicated by geochemical data,was developed during Sinian to Early Ordovician in Kuruktag area of the Tarim Basin.The Sinian volcanics are typical bimodal volcanic rocks in Kuruktag area,which are consisted of acidic and basic volcanic rocks but with rare medium acidic one.REE distributive pattern of basic volcanic rocks showed steep right dip and was rich in light REE which is in accordance with REE geochmical characters of basalt from mantle plume.In the northeast of Tarim Basin,depositional facies were arranged as basinal,slope,platform margin and restricted-open platform facies from east to west in Cambrian to Ordovician,which showed the sedimentation of passive continental margin.Therefore,the Kuruktag ur-ocean rift and Manjaer original continental margin were proposed.There is potential for petroleum exploration around the Manjaer original continental margin.
THINKING ON THE PRESENT RESEARCH OF BASIN-MOUNTAIN COUPLING
ZHANG Jin, MA Zong-jin, REN Wen-jun
2004, 26(2): 169-175. doi: 10.11781/sysydz200402169
Abstract(727) PDF-CN(460)
Abstract:
Recently,the research of basin-mountain coupling has become one of the hotspots in Geology.Based on the previous research,we think that the basin-mountain coupling is not only on vertical profiles but also on planar profiles.On vertical profiles,the relationship between orogenic belts and basins is showed by the coupling of the structures in different depth;on planar profiles,the relationship is showed by the structure combination of basins and mountains (such as the grouping of faults,the deformation styles of rocks and the assemblage of topography).So in the research of basin-mountain coupling,we should pay attention not only to the balance of materials but also to the mechanical relationship.The coupling of the young basins and mountains maybe pervasive,however that of the older ones is possible not.The conception of the basin-mountain coupling is not a complete one.And in fact,basin-mountain coupling is the coupling between the plates or blocks,and the mountain building is one of the results of the coupling process.
EFFECTS OF THE HIMALAYAN MOVEMENT ON THE FORMATION OF OIL-GAS RESERVOIRS IN THE JIANGLING SAG
YANG Chang-qing, CHEN Kong-quan
2004, 26(2): 176-179. doi: 10.11781/sysydz200402176
Abstract(778) PDF-CN(360)
Abstract:
In the Jiangling Sag,there were intensive tectonic movements of the Himalayan cycle (mainly occurring as three phases),which exerted significant effects on hydrocarbon migration and accumulation.These effects appeared in following aspects:1)the strong compression stress derived from the Himalayan movement provided a great power for the expulsion of hydrocarbon from the Xingouzui Formation,with the three phases of the intensive Himalayan tectonic movement corresponding respectively to the three phases of hydrocarbon expulsion;2)the late phase of the movement changed the fluid dynamical conditions for the secondary migration of hydrocarbon,and thus tended to influence the direction and way for the secon-dary migration of hydrocarbon as well as the sites for hydrocarbon accumulation;3)the effects resulted in the decreasing of hydrocarbon-filling degree in structural highs,and led to the increasing in structural lows;4)the early and middle phases of the movement formed important structural conditions for hydrocarbon accumulation,while the late phase of the movement tended to adjust and change the early hydrocarbon reservoirs,and even destroyed them to reform some secondary hydrocarbon accumulation.
SIGNIFICANCE AND DISCOVERY HISTORY OF TAHE OILFIELD OF THE TARIM BASIN
LI Yu-zhan, XU Chuan-hui
2004, 26(2): 180-186. doi: 10.11781/sysydz200402180
Abstract(845) PDF-CN(449)
Abstract:
Tahe oilfield is located in the south part of Arekule arch of Shaya uplift in Tarim Basin,which was discovered in 1990s,During exploration and production of Tahe oilfield,regularity of hydrocarbon accumulation was continuously recognized.Taking the large paleo-slope near main source rocks as the exploration targets and discovering large primary reservoirs closing to large faults and uncomformities are the basic strategy for petroleum exploration in the area.Much technology,such as identification and prediction of accumulation,protection of reservoir,and acidizing and fracturing of oil-bearing formation,was established and developed.Tahe oilfield is first oilfield of superdeep unconventional reservoirs of marine carbonates in China.It contributed a lot for the economic development in Xinjiang and showed important significance for development strategy of petroleum industry.
POOL-FORMING RULES OF OIL AND GAS IN THE THIRD MEMBER OF THE FUNING FORMATION, THE NORTH JIANGSU BASIN
ZHOU Li-qing, LIU Chi-yang, LU Huang-sheng, ZHANG Huai
2004, 26(2): 187-193. doi: 10.11781/sysydz200402187
Abstract(594) PDF-CN(480)
Abstract:
The oil and gas assemblage in the third member of the Funing Formation(Ef3),the North Jiangsu Basin is a main target stratum of progressive increasing in proven oil reserves and output recently.The good-quality brackish-water-facies source rocks formed in the middle-lower part of the Fu-2 Member (Ef2) of the basin is the principal source rocks of Ef3 oil pools.The favorable reservoirs lie in the upper parts of upper and lower Ef3 sandstone,and thick layers of lake-facies mudstone with poor hydrocarbon-generating ability lie between the reservoirs and the middle-lower part of Ef3 source rocks.Therefore,the association of source rocks,reservoirs and caprocks becomes worse,and need to be linked up by faults so as to form good oil pools.Oil pools of Ef3 appear in definite locations.They are mainly formed nearby inherited nose uprift belts and contemporaneous faults or large late-stage faults.Favorable structural types and organic matching of sedimentary systems,tectonic frameworks and trap bodies are necessary elements to form the oil and gas pools of Ef3.The pool-forming model of oil and gas in Ef3 showed that the main objects of oil and gas exploration should be focused on inherited uplift belts and contemporaneous faults or large late-stage faults in the districts with unfavorable source rock-reservoir-caprock matching.
PETROLEUM EXPLORATION DOMAINS OF CONTINENTAL NONSTRUCTURAL TRAPS IN CHINA
HE Zhi-liang
2004, 26(2): 194-199. doi: 10.11781/sysydz20040219
Abstract(623) PDF-CN(571)
Abstract:
Exploration activity in main continental oil-producing area in China has entered a stage focusing on exploration of nonstructural traps.The development and distribution of nonstructural traps in fault basin,depressional basin and foreland basin were summarized in accordance with the main controlling factors of basin formation and its total structural pattern.The following 6 domains must be paid more attention to:a) area with repeated depositional facies change;b) unloading area of depression;c) break in steep slope and flexural fold in gentle slope;d) pericline,pitching end and overlying stratigraphy of paleo-uplift;e) lower part and footwall of fault block;and f) synclinorium.Exploration in Ordos,Songliao,Bohaiwan,north Jiangsu and Nanyang basins are dominated by nonstructural traps.However,exploration of nonstructural traps in basins in central and west China and offshore area has just been started and many potential domains for petroleum exploration are remained.
STUDY OF OIL MIGRATION AND INJECTION DIRECTIONS BY NITROGEN COMPOUNDS
LI Xian-qing, HOU Du-jie, XIAO Xian-ming, YANG Kai-lin, TANG You-jun, BAO Jian-ping, MA An-lai, XIONG Bo
2004, 26(2): 200-205. doi: 10.11781/sysydz200402200
Abstract(704) PDF-CN(543)
Abstract:
Based on the composition and concentration changes of nitrogen compounds in the study oil samples as well as the maturity indexes of saturated and aromatic biomarkers,this paper investigated the oil migration and injection direction of Caofeidian and nearby areas in the offshore part of the Bohai Bay Basin.The results showed that the distribution and composition characteristics can indicate oil fractionation effects.With the increasing of oil migration effects,the concentration of nitrogen compounds decreased whereas the ratios of shielded nitrogen compounds to exposed or semi-shielded ones increased.The oil migration and injection direction of the Shaleitian Uplift was from east to west,with the main charging point in the east.Two oil migration and injection directions (i.e.,eastnorth and southwest) were found in the Shadongnan tectonic zone.Oil in the Shijiutuo Uplift and the inclined end migrated from northwest.This is consistent with oil migration directions deduced from the gradient changes of hydrocarbon biomarkers.All these conclusions are also accorded with the regional oil occurrences and exploration facts.
EVALUATION OF THE HYDROCARBON——GENERATING POTENTIAL FOR THE POSSIBLE HYDROCARBON SOURCE ROCKS OF THE MIDDLE——UPPER PROTEROZOIC IN NORTH HUABEI AREA
WANG Jie, CHEN Jian-fa, DOU Qi-long
2004, 26(2): 206-211. doi: 10.11781/sysydz200402206
Abstract(772) PDF-CN(601)
Abstract:
Marine carbonate rocks are widespread and their deposit layers are huge thick in the Middle-Upper Proterozoic of North China.At the same time,many outcrops of asphalt and oil seepages in the Middle-Upper Proterozoic strata indicate that their hydrocarbon-generating potential appraising is an important subject to further study.In this article,by managing the pyrolysis data of organic matter,we concluded that kerogen was mainly humic (Ⅱ) type and humic-sapropelic (Ⅲ) type with few Ⅰ type.This is of great differences with the fact that the evolution of living beings standed on initial stages and organic matter held sapropelic type at that time.Moreover,as for the oil-generating potential,the kerogen type of the Xiamaling Group is better than that of other groups.By systematical studying of the organic matter abundance,the hydrocarbon-generating potential and the kerogen types of samples,the authors synthetically determined the hydrocarbon-generating potential of samples in the Middle-Upper Proterozoic of North Huabei area and found three positions of better hydrocarbon-generating potential,namely,the Xiamaling Group,the Tieling Group and the Hongshuizhuang Group.
APPLICATION OF GROUND PENETRATING RADAR IN OUTCROP GEOLOGICAL STUDY——AN EXAMPLE OF THE ORDOVICIAN CARBONATE OUTCROPS IN THE TARIM BASIN
ZHANG Xing-yang, LUO Ping, GU Jia-yu, ZENG Xiao-feng, WANG Shen-guo, LING Peng
2004, 26(2): 212-216. doi: 10.11781/sysydz200402212
Abstract(682) PDF-CN(495)
Abstract:
Ground penetrating radar (GPR) is a high-resolution electromagnetic method to inspect the shallow subsurface features.Foreign geologists have used GPR in many fields of outcrop geological studies such as 3D reservoir molding,sedimentary facies analysis,high-resolution sequence stratigraphy,3D fracture imaging,shallow-fault finding,paleokarst study and so on.The Ordovician carbonate outcrops of Bachu Dawuzitage hills in the Tarim Basin are well developed and present abundant geological phenomena including bioherm-beach assemblages,intrusion of igneous rocks,karst features and so on.Ground penetrating radar experimental survey with frequency of 32-500 MHz has been conducted in this area.The results indicated that the penetrating depth can be up to 20 m with the maximum resolution of decimeter.Many geological features,such as reefs,channels in the reef,small-scale faults and karst caves,have typical responses in the high-resolution GPR profiles and can be corresponded well with outcrops.This provides a new associate approach for the outcrop study of carbonate rocks.

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