最新刊期
卷 17 ， 期 1 ， 1996
- 摘要：The sequence stratigraphic analysis of epicontinental coal-bearing basin differs from thatof continental margin basin. In the vast epicontinental coal basin of the Late Paleozoic inNorth China, the sea level changed suddenly and frequently, the paralic coal measuresformed in this condition is thinner than the sequence of marginal sea basin. Based on thebasin-filling characteristics, the control of sea level change over the types and spatial distribution of depositional systems, the basic thought and method of sequence stratigraphic analysis of epicontinental basin have been proposed as fallows:the classification of third order sequence and the intrasequence structural units could be taken at the same time; the recognition of maximun marine flooding surface,sequence interfaces,subsequence interface and depositional system tract could be taken at the same time关键词：内陆表海;含煤盆地;层序地层分析;晚古生代;思路;方法781|663|0更新时间：2023-05-30
- 摘要：The subsurface markers for identifying wrench structure could be concluded as follows:(1)echelon structure 3(2) flower-form structure;(3)braid structure;(4).narrow deformationzone;(5) deep narrow half-graben;(6) narrow thick coarse deposit zone;(7) unmatchablestrata across a fault;(8)swaying and variable fault dip;(9)clutter seismic reflection.However,the trend of overstating the effect ofwrenching may occur due to inaccurate identification in actual application, especially in identifying echelon structure and flower-formstructure.The key problems are(1) tenso-echelon does not always indicate wrench fracture;(2) as for the shallow-rooted structures in a basin,"basement-involving"could not be theessential identificative criterion of wrench fault I(3)the back--thrust blocks that widely developed in oil provinces in West China are mostly not flower-form structures.关键词：扭动构造;鉴别标志;问题;花状构造;雁列构造;背冲断块677|497|0更新时间：2023-05-30
- 摘要：Cyclic deposition on a global scale is the product of the changes in sea-level,tectonics,climate, geography and depositional features of the global or the combination of these. Globalcyclostratigraphy is defined as the study of cyclic depositional patterns in the geologic recordproduced by the interaction of climate and tectonic processes. It is a stratigraphic branchwhich is developed based on the sequence stratigraphy. Stratigraphic changes through estimating sediment types and depositional environment in a basin can be predicted by means ofthe global cyclostratigraphy. This paper introduces systematically the fundament of theglobal cyclostratigraphy and application to predicting the stratigraphic thickness,lithofaciesdistribution and growing patterns of carbonate.关键词：全球旋回地层学;层序地层学;地质旋回;地层模拟;旋回地层带597|510|0更新时间：2023-05-30
- 摘要：There are two domains of petroleum exploration in Tibet-the Mesozoic marine domainand Cenozoic continental domain.The marine domain can be further divided into Qiangtang,Lasa and Jiangzi blocks. Among them,Qiangtang block has relatively favourable prospectsbecause the deep tectonic movement and the deformation of sedimentary cover in it are lessserious than the other two blocks. Continental domain mainly includes two kinds of basinswith different properties:compresso-depressed basins and strike-slip faulted basins. LunpolaBasin,a typical strike-slip faulted basin, is the focal target for oil and gas exploration in Tibet recently since commercial oil flow has been drilled in this basin.Various kinds of residual plateau basins developed in the region since Himalaya movement. They are a special kind of basins in orogenic zone. Wether a complex of geomorphicstructural-sedimental basin could form is an important factor to determine hydrocarbon potential of the plateau basins; the depth of oil oxidation surface in the basin is also a key factor in evaluation of preservation condition.关键词：西藏;高原盆地;勘查领域;氧化界面;油气远景635|908|0更新时间：2023-05-30
- 摘要：The distribution of open-fracture in Eogene abnormal overpressure mudstone and shaleof Changdong-Nanpi Sag in Huanghua Depression suggests that the mudstone and shale withopen fractures centralized in certain depth interval in vertical, but laterally the overpressurezone is regionally distributed. The porosity,the content of ascanite, the residual total hydrocarbons/total organic carbon (TH/TOC) and ααα20S/20S+20R C29 of the mudstone and shale decrease more than that of the upper and lower beds. It thus proved that so long as the openfractures form,a large scale of continuous fluid expulsion would start and the fractures wouldnot close until the expulsion potential exhaust. According to the distribution of the open fractures,the main zone of oil and gas migration could be determined.关键词：异常超压;开启泥岩裂隙;油气初次运移599|714|0更新时间：2023-05-30
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THERMAL HISTORY ANALYSIS OF DONGYING DEPRESSION,SHENGLI OIL REGION: EVIDENCE OFAPATITE FISSION TRACK
摘要：The analysis of apatite fission tracks of 12 samples collected in Dongying Depressionindicates that the depression experienced a continuous cooling thermal history after its formation. Two distinct cooling processes took place during 50～60 Ma and 20～30 Ma respectly,and the cooling during 20～30Ma was resulted from the uplift and erosion of the depressionin the end of Dongying Formation,and the estimated thickness of the uplift and erosionamounts to more than 200 m. The depth of apatite fission tracks annealing zone ranges from 2 000 m to 3 400 m,which is well consistent with the depth of oil generation window.At thesame time,the rapid increase of recent temperature due to burial depth led to the high temperature range of the annealing zone.关键词：磷灰石;裂变径迹;东营凹陷;热历史608|768|0更新时间：2023-05-30 - 摘要：Selecting pertinent scale, the spatial distribution capacity of oil-gas fields in SichuanBasin can be calculated by fractal dimensions. Meanwhile,self-similarity of fault spatial distribution can be examined more effectively by using multifractal theory. Calculating results ofmultifractal dimensions of different zones in Sichuan Region show that spatial distribution ofoil-gas fields and faults are fractal structures and have quit.6 well self-similarity with correlation coefficients better than 0. 99.Oil-gas fields are closely related to the spatial distributionof faults in these zones.The fractal dimension of capacity, information dimension and correlation dimension of fault spatial distribution are about 1.02,1.03 and 1. 04. These zones aremain oil-gas enriched provinces.Therefore, oil--gas exploration and development should bestrengthened in southeastern and central Sichuan and Mianyang--Leshan Regions and in otherplaces,hydrocarbon exploration should be focused on deep-seated pools关键词：分形;分维;空间分布;油气田;四川盆地718|737|0更新时间：2023-05-30
- 摘要：Though marine oil provinces in the Middle Yangzi Region underwent serious deformation due to Yenshan movement,and as a whole,the hydrocarbon preservation condition of theregion is poor,some blocks favourable for oil and gas preservation could be found within theregions according to the analysis of their sealing condition and geochemical property of subsurface fluid. It is proposed that Mianyang and Dangyang blocks should be considered as thefirst favorable ones,Lixian block could be taken as secondary favourable one, andChangyang,Qianjiang blocks might be the third ones.关键词：中扬子区;保存条件;晚期烃源;有效圈闭;现实保存;凹中隆起568|625|0更新时间：2023-05-30
- 摘要：The reservoir rock of the third member of the Shahejie Formation in Hubuzai, DongpuDepression is compacted sandstone with poor petrophysical property, but its reservoiringproperty improved a great deal due to well-developed fractures within the reservoir rock. It isconsidered that the hydraulic fracturing that was resulted from high-pressure fluid of saltinterlayers and the regmagenesis caused by uplift--unloading and stress release are importantorigin of the fractures in the area.关键词：户部寨;储层;微裂缝;水力破裂;卸载破裂524|538|0更新时间：2023-05-30
- 摘要：Middle Yangzi Region is an ancient stable latform of continental crust type that is characterized by great.thickness of lithosphere and low heat flow value. Post indo-China structural reformation could not change the whole stable framework of the platform,nor could itessentially damage the Lower Paleozoic oil pools of the region. The protection of Silurian detached formations and the delay of hydrocarbon evolution resulted from cold crust favour theremigration,accumulation and preservation of deep seated oil and gas. The Cenozoic extending basins in which Jianghan Basin is the main body is not located at the continental riftzone,its formation time is new and it is less disturbed. It could be considered as a oil provincewith completely developed structural configuration.关键词：中扬子地台;物理场;岩石圈厚度;基底;含油气性520|618|0更新时间：2023-05-30
- 摘要：Marine sediments with enormous thickness deposited in Qiangtang Basin, North Tibet inLate Paleozoic-Jurassic. This provides favourable material base for hydrocarbon generation.According to the deformation feature and the framework of the basin's basement,the basincould be divided into three tectonic units as North Qiangtang Depression,GangmacuoXiyargang Uplift and South Qiangtang Depression. The North Qiangtang Depression is considered as the most prosperous one for hydrocarbon exploraton due to its well-developedsource-reservoir-cap assemblage and relatively gentle deformation and transformation. Duogecuorenxi, Qulonghe-Cuoni and Donghu in the depression are the most favourable blocksand could be taken as the first targets for oil exploration.关键词：羌塘盆地;构造区块;区块评价;油气远景611|809|0更新时间：2023-05-30
- 摘要：Dongting Basin,covering an area of 1.5×104km2,is a Meso-Cenozoic fault-depressedbasin developed on the basement of the Proterozoic.It subsided several times and received 100～334 m thick Quaternary sediments under the influence of neotectonic movement. Biogasshowing could be seen very often. The accumulation of the biogas is primarily controlled bygas source and reservoir conditions. The organic-rich dark sediments are good source beds;sand beds and gravel beds are major places for biogas accumulation, the clay and sand claybeds of the upper part of the Proterozoic are fine regional cap beds.It is suggested thatXiaojiawan-Yazigang and Sanxianhu-Chapanzhou regions are favourable for Quaternary biogas exploration of the basin.关键词：洞庭盆地;第四系;生物气;地质特征;远景分析630|705|0更新时间：2023-05-30
- 摘要：According to the geological model for evaluating condition of hydrocarbon generation,an artifical neural network with three-layer networks,multi-imput and single output isbuilt. The hidden layer consists of four neural cells'This neural network can acquire weightby itself, and modify constantly the connections between the cells. The weight-assigned connections are automatically built by the artifical neural network, thus renewing the old methodof manned weight-assignment. This method is more objective and accurate.The method isused to evaluate the hydrocarbon generation condition of the Ordovician System in OrdosBasin, the result is basically the same as that of the expert system.关键词：人工神经网络;权重;生烃条件;评价599|688|0更新时间：2023-05-30
- 摘要：Coal measures in Hunan Province are mainly in the Lower Carboniferous Cheshui Formation and Upper Persian Longtan Formation. The coal-bearing areas totalled 5. 5?104km2. The coal series wiThin the study area are well developed. The degree of coal evolutionhas reached mature-over mature stage with relatively strong gas-producing capacity and absorbality. The gas content of the coal beds is controlled by the depositional envoironment, thedegree of coal evolution, buried depth, hydrologic condition and geological structure of thecoal-bearing measures, while its porosity and permeability are mainly controlled by coal-rocktype, coalification degree and ground stress. Hydraulic fracturing and cave completion are effective ways to improve poor porosity and permeability. Hongshandian lean coal experimentalzone in Central Hunan and Duolishan coke coal experimental zone are the most favourable regions to develop coal-bed methane.The target bed is the Upper Permian Longtan Formation.关键词：煤层气;地质特征;生气能力;远景评价;试验区;湖南650|656|0更新时间：2023-05-30
- 摘要：Lishi fractural zone, situated between Ordos Basin and Shanxi Rise,is characterized by.en echelon fault system in its north section and compresso-shear structures in south section.The faulting of the north section started in Late Paleozoic and the system has the property ofsimasphere fault;the compresso-shear started in Middle Triassic and the structures are considered to be sialsphere faults. The fault zone is not in lithosphere but in the earth crust since'it does not separate active zone from stable zone but secondary struetural units within NorthChina Plate关键词：断裂带;展布;特征;演化;离石640|451|0更新时间：2023-05-30
- 摘要：Geological data collected from Tarim Basin indicate that detachment beds are closely related to depositional sequeces.Mudstone-shale detachment is generally corresponding todense section of the depositional sequence; gypsum-salt detachment is roughly equivalent to low-water level system reaml of the sequence. Under certain condition, the two kinds ofdetachment could be used to identify dense section and low-water level system domain and toclassify depositional sequence关键词：滑脱层;沉积层序;密集段;低水位体系域;塔里木盆地544|653|0更新时间：2023-05-30
- 摘要：Data of well-test pressure could effectively reflect the vados characteristics of reservoir.But in describing reservoir heterogeneity with well-test data, one must pay attention to thedetermination of fluid phase variation in well-test,the time-correction of the test data, thenoises caused by low accuracy and low resolution of mechanical pressure gauges.关键词：试井压力;储层;非均质性;流体相态变化;时间校正;噪声536|546|0更新时间：2023-05-30
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