最新刊期
卷 9 ， 期 3 ， 1988
- 摘要：HQ-13 Line is the first comprehensive geophysical-geological sectionstretched deeply to the bottom of the lithosphere in the Lower Yangzi Reaches.The section, over 500km long, starts form Lingbi of Anhui Province in then orthwest to Fengxian of Shanghai in the southeast. Gravity survey, aeromag-netic survey, crustal seismic sounding, crustal seismic reflection, geo-electromagnetic sounding, absorbed hydrocarbon, soil mercury measurement and ground geological survey have been carried out on the section. They have revealed the structural features of the crust and mantle of this area which have"eight sides", "seven layers" in vertical and "four blocks" in horizontal.Twelve major geological achievements have been obtained. Some of the achieve-ments belong to basic geological theory, e. g., multiple glides. multi-layerbalanced adjustment, the evolution sequence of depression-uplift exchange instructural layers in vertical: confirming the Moho to be transition layer ofseveral thousand meters thick, the multicontrol of deep-seated geologicalfactors over structural evolution of basins, etc…… Some are great regionalgeological questions, including the confirmation of both deeper and shal-olwer metamorphic crystal basements,the discovery of the Shuanggou nappe beltas the boundary between the North China Platform and the Yangzi Para-platform. Some are related directly to hydrocarbon exploration, such as the thickness, buried depth and internal structural features of Paleozoic and Me-sozoic marine sediments, the heterogeneity of geothermal fields in verticaland horizontal directions etc..580|780|0更新时间：2023-05-30
- 摘要：Immature oil has been found in a number of Tertiary basins in China.The authors studied the core profiles of the Dongpu Depression in Henan Pro-vince and made thermo-degradation experiment on immature source rocks. Itis found that after hopenes, ββ-hopanes and rear rangment sterenes disappeared successively with the increase of buried depth, the configuration of homo-hopanes came to reach equilibrium. Thermal simulation experiment has pro-ved that lower matured crude oil might be generated from some kinds ofsource rocks during diagenetic stage. The tricyclic terpanes generated in thisstage had the tendency to concentrate in crude oil. The abundance ratio oflower-molecular-weight tricyclic terpanes to higher ones can be used to sub-divide diagenesis.548|686|0更新时间：2023-05-30
- 摘要：为加强石油化探工作,地质矿产部石油地质综合大队101分队(合肥),最近更名为地矿部石油地质海洋地质局化探中心,并自七月一日起全面承办对内对外的各项有关业务。 该中心的前身101队,创建于1964年,二十多年来,坚持科研与生产相结合,大力引进先进技术和方法,在全国各主要含油气盆地进行了大量工作,为各地区含油气评价作出了可贵的贡献。724|515|0更新时间：2023-05-30
- 摘要：The method of regional seismic stratigraphy should be improved in some aspects due to the differences between fault-depressed continental basins and marine basins. The meaning of reflectional terminals varied from kind tokind. Seismic sequences should be discriminated into supersequences, sequences and subsequences according to the scale of unconformity. In the analysisof seismic facies, a reasonable program should be followed, and the internal combination of seismic facies, the gully-fan connection and the velocity-petrology parameters should be considered in addition to geometrical andphysical parameters. The inter pretation of seismic facies into correspondent depositional facies must be combined with well data as much as posible, and the seismic facies must be concordant with core facies ahd well-log facies.The study of the Langfang-Gu'an depression has provided an example of above approach.677|725|0更新时间：2023-05-30
- 摘要：The Dongpu Diwa (depression) is located at the southern end of the Bohai Bay Diwa series in Huanghe-Huaihe Diwa system, North China Diwa region.It developed on the basement formed in platform tectonic layer of the Paleo-zoic or structural basement of the Mesozoic, and had the structural form ofdouble fault graben. One of the most striking characteristics is the development of rhombic fault blocks on the basement. NNE striking Lanliao, Changyuan,Huanghe faults and nearly EW stretching Wenmingzhai-Fanxian, Huzhuangji-Maogang, Gaopingji-Xichengji, Changyuan-Gegangji, Naoli-Sanchunji faultscut the basement of the Dongpu Diwa into eight blocks. The sediments that arearranged into zones in E-W direction and blocks in S-N direction are also con-trolled by these faults. The isobath of 34 km in the Moho depth draw clearlythe outline of the Dongpu Diwa, this indicates the relation of mirror image with NNE trending swell of the mantle. Its tectonic evolution underwent two stages. The early period (the Late Eocene-Oligocene) was tensil-faulted stage,forming fault-depressed diwa; the late one (the Miocene-Pleistocene) was com-presso-depressed stage,forming depressed diwa. The formation mechanism of the Dongpu Diwa is that the tectonic evolution began with the conjuction of a de-crease of the crustal thickness and diapiric uprise of the mamtle caused by re-gional tensil stress in the early stage. The main feature was that the volume of crustal extension vary directly as the thickness of sediments; subsequently,the crust depressed due to balanced adjustment assisted by SE-NW compression in the late stage. Its principle character was the evolution of separated sagsto an unified and extensive depressed basin.601|521|0更新时间：2023-05-30
- 摘要：Trace fossils from Upper Devonian Shetianqiao and Xikuangshan Forma-tions of Xinhua County, Hunan. contain 9 genera, 14 species (including 2new species) and form 7 trace fossil assemblages as following: 1. Phycodes-Palaeophycus assemblage formed in intertidal zone, belongs toSkolithos ichnofacies. 2. Daedalus-Rhizocorallium assemblage formed in platform margin environ-ment, belongs to Cruziana ichnofacies. 3. Chondrites-Palaeophycus assemblage formed in intertidal and offshore en-vironment and belongs to Zoophycus ichnofacies. 4. Palaeophycus-Linoichnus assemblage formed in intertidal zone and belongsto Skolithos ichnofacies. 5. Planolites assemblage formed in restricted offshore environment andbelongs to Zoophycus ichnofacies. 6. Chondrites-Palaeophycus assemblage formed in offshore environmment,belongs to Zoophycus ichnofacies. 7. Skolithos-Chondrites assemblage formed in intertidal environment,belongsto Skolithos ichnofacies.590|951|0更新时间：2023-05-30
- 摘要：Oil-bearing sandbodies in the upper Triassic Yanchang Formation of north Shaanxi are mainly channel deposits related to lacustrine delta. The delta was builted by the river which discharged into a large freshlake. At that time, north Shaanxi was located on a vast shallow platform of the north flank of the lake basin, the water depth of which ranges from several metres to more thanten metres. In this setting, the river waters often flowed in by a density underflow, so that it was very difficult to form river-mouth bar. Even though thin progradational facies could be formed, it would have been scoured intensely by advancing river waters. As a consequence,channel sandbodies are commonlyin contact with lacustrine mudstone by scouring. The platform deltas are characterized by widespread banded sandbodies, the distribution map of which mainly reflects fluvial and distributary channel de-posits. These channel sandbodies are subdivided into three types according totheir sedimentary characters: sand-rich low-sinuosity channel, mud-rich low-sinuosity channel and mixed load meandering channel deposits, in which the mixed load meandering channel deposits occurred in upper delta plain are the most important reservoirs.698|900|0更新时间：2023-05-30
- 摘要：Based on the analysis of the curves of mudstone compaction, it is ascer-tained that the smallest depth of hydrocarbon-expulsion of the Xingouzui Forma-tion in Jiangling and Qianjiang Sags of the Jianghan Basin is 2100m, and thatthe expulsion coordinated very well with hydrocarbon generation. We can seefrom the maps of palaeoburiel depth made by the resumption of eroded thick-ness and the compaction correction of strata that, most Xingouzui sourcerocks began its hydrocarbon expulsion after the deposition of the Jingsha For-mation, and that the effective source rock possessed the most extensive distribu-tion after the deposition of the fourth section of the Qiangjiang Formation. A series of excess-pressure profiles and maps have been drawn out based oncompaction curves. In accordance with the direction of hydrocarbon migration suggested by these maps and other geological conditions,the authors also eva-luated the exploration prospects of the research area.604|966|0更新时间：2023-05-30
- 摘要：A lenticular sandstone with carbonized asphalt up to 8-15% is discoveredin the lowest part of the Upper Proterozoic Xiamaling Formation in Longtan-gou,Lingyuan County, west Liaoning. The authors consider that there was anoil pool in the Proterozoic which was then destroyed by the intrusive gabbro-diabase of 7.6340?0.0861 million years dated by K-Ar isotopic method, Inthe places where magmatism was weak, it is possible to find oil pools in the Proterozoic.642|821|0更新时间：2023-05-30
- 摘要：伊通断陷南北长150km,宽10—20km,面积约2400km2。基底埋深1200—6000m。1985年3月煤炭部在该区岔路河85—3孔于井深58.8—1000.34m发现稠油油砂18层31.94m。1984年,吉林油田管理局开始地震普、详查,打探井9口,普遍发现油气显示。682|501|0更新时间：2023-05-30
- 摘要：The Es34 submember in Wenliu area is a typical salt lake deposit. The rock salt js of great thickness, high purity and wide distribution. The uneven elevation and subsidence of basement fault blocks led the saline formation to varyin buried depth. Under differential compaction, the plastic rock salt flowed towards the structural apex along horizones and locally concentrated. And then,the arching of the salt body made the overlying formations curve, deform andfracture, thus forming salt domes. The salt dome apex slumped under gravityand arching force and formed a salt anticline. Subsequently, the overlying cover on the salt dome resulted in graben-subsidance and made the salt anticlinemore complecated due to the tensil force. Other structures associated withsalt flowage are: salt pillow-"pillow like" salt enrichment formed in the flowdirection due to fault or hard formation barrier: salt wedge- "wedge shaped"intrusion of salt flow along fault fracture zone; slender shin deformation-locally thinned formations due to salt loss. The salt flowage phenomena mention-ed above provided various types of traps for hydrocarbon accumulation later on.These traps, in conjuction with favourable oil-generation condition, made Wenliu area become the most abundant place in hydrocarbon resources of the whole depression.619|958|0更新时间：2023-05-30
- 摘要：The Dainan Formation in the Gaoyou Depression is a complete sedimentary cycle. It consists of lacustrine facies in an onlapping style at the lower partand fluvial facies at the upper part in a filling pattern, showing a evolution-ary process from lacustrine to fluvial facies. The various sedimentary systems as Majiazui-Lianmengzhuang long-axialdelta, Zhenwu - Caozhuang fan-delta and Zheduo delta are respectively inthe west, south steep slope and north gentle slope of the depression. Amongthem, the fan delta and long-axial delta systems are favourable for hydro-carbon accumulation.630|674|0更新时间：2023-05-30
- 摘要：南海北部湾盆地面积35000km2,水深小于50m。该盆地有涠西南、海中、乌石、迈陈等4个下第三系生油凹陷,生油岩面积22000km2,平均厚度500—720m,有机物质丰富,有机质类型好,属好—最好的生油岩。691|488|0更新时间：2023-05-30
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PRELIMINARY STUDY ON HYDROCARBON POTENTIAL OF JINGGU MICRO-TYPE FAULT-DEPRESSED BASIN IN WEST YUNNAN
摘要：A series of micro-type fault-depressed basins of the Late Cenozoic are distributed in west Yunnan Province. Each of them is less than 250 km2.Among them,there are four basins with an area of more than 80km2, sediment thickness greater than 1,000m. Now oil and gas have been discovered in theJinggu Basin. The Jinggu Basin, with an area of 83 km2, is a dustpan-like fault-depressed basin formed upon the folded basement of Early Tertiary. It containscoal-series strata of continental sand-mudstone with a thickness of more than 2,400m, and is characterized by: (1) great thickness of sediments and sourcerock; (2) source rock is rich in organic matter (organic carbon is 1.145%,chloroform bitumen A is 0.12%, total hydrocarbon is 1307 ppm), and hasreached lower matured stage (vitrinite reflectance Ro is 0.61-0.69%); (3)dis-posal relationship of generating, reservoiring and covering combination is good.535|447|0更新时间：2023-05-30 - 摘要：近两年来.四川西部天然气勘探在两个领域取得了重要成果。 一、德阳孝泉地区侏罗系上沙溪庙组紫红色砂,泥岩中发现了复杂的非常规超压裂缝性气藏。天然气产在由裂缝网络的砂岩和砂、泥岩互层以及泥岩中,深度1500-2000m,最高单井无阻流量可超100000m3/d,目前已有几口工业气井投产。608|530|0更新时间：2023-05-30
- 摘要：The most key link is to evaluate reservoir by porosity of reservoir-accumulation stage in the reservoir research. As long as we grasp this key link,we can make appropriate evaluation and estimation. Porosity types of reservoir-accumulation stage may be divided into fivetypes: 1. Primary porosity of burial stage; 2. Secondary porosity of burialstage: 3. Nearsurface secondary porosity of early diagenesis; 4. Nearsurface secondary porosity of late diagenesis; 5. Dolomitization porosity. To estimate the porosity of reservoir-accumulation stage, we must recoverthe history of porosity evolution through the medium of diagenesis re-search, and determine the stages of decarboxylation and reservoir-accumulation based on maturity of organic matter. Through the agency of the relations be-tween the evolution of porosity and organic matter, we may be able to find the space distribution of hydrocarbon reservoirs and the commercial potential.576|614|0更新时间：2023-05-30
- 摘要：The Jizhong Depression is famous for the discovery of Renqiu buried-hill oilfield. This achievement was gained after nearly 20 years of hard exploration.To review the discovery process, there are two respects worth noting: 1. Itshould be based on the option of the most favourable exploration objects with-in the whole region in stead of concentrating too early efforts on some localareas in the early stage of exploration: 2. Choosing the object bed for explo-ration should be fit in with the drill capacity and search for more oil-bearingsets for test in stead of restricting the test within some sets subjectively sothat it may enhance the discovery of oil and gas fields. The output of Renqiu oilfield has decreases progrossively after more than ten years of production. To develop hydrocarbon exploration and open up newprospect, we ought to make more exploration in lower explored places in the Jizhong Depression and draw a plan to find new hydrocarbon-bearing sets. There are a certain number of sedimentary subdepressions which are notsmall in area developed in the Tertiary and Mesozoic to be explorated in the depression. It is estimated that the decreasing trend of crude oil out put in the Jizhong Depression at present could be changed and North China oil fields will get a new development so long as suitable work load is thrown in.597|793|0更新时间：2023-05-30
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