最新刊期
卷 14 ， 期 3 ， 1993
- 摘要：The co-existence of both Upper Triassic organic-rich sediments and super-tight sand-stone is a very typical petroleum geological condition in Western Sichuan Basin.The oil-generating peak period in the end of Middle Jurassic was just the time when original porosity of the sandstone reduced and secondary porosity increased gradually.Favourable condition,combined with various traps formed earlier,formed the first upsurge of lateral migration and accumulation.After continuous subsidence of more than 100 million years of the basin,the rocks were already getting super-tight (average Φ<7%),hydrocarbon generating was slow down and turned to craking,and superpressure formed in sedimenta-ry rocks,thus resulting in the sluggishness of natural gas.Himalayan tectonic movement resulted in many new structural traps,and fractures connected pore spaces in the super-tight sandstone.This let to the second upsurge of both horizental and lateral migration and accumulation.The porosity of supertight sandstone tended to be“pseudo-limit”of gas migration,this made things more complicated for gas accumulation and recovery:1.Linear gas-pool groups distributed along fracture system;2.Layer-like reservoirs formed by felty sand-stone with fracture system could be good anticlina gas pools with edge water drive,but the gas production would vary remarkably in different wells.However,this type of gas poolsare still the main targets for gas prospecting in West Sichuan.3.Porosity lower than the“pseudo-limit” (Φ≈2.5%,throat T≈10nm)is not valuable,but the gas would flow out from fracture belt suddenly into the wellbore and even make blowout sometime,then the production will decline rapidly.4.Gas fields with certain reserve might form in local places where better porosity of sandstone equivalent to the tight sandstone class (8%—15%)at the shallow formations or favourable facies and petrogenetics.The production is high when fissure developed in the sandstone;otherwise,it is low.This is another target for gas exploration.关键词：超致密砂岩;构造裂缝;次生气藏;晚期成藏;四川盆地;上三叠统682|713|0更新时间：2023-05-30
- 摘要：The typical thrust-fold nappe structural belt occurred in the south margin of Jiuxi Basin is broad in scale,very complicated in structure and the evolution process is tortu-ous.The structures include thrust nappe which is mainly composed of Paleozoic Erathem and the fold nappe that is mainly made up of Meso-Cenozoic.The rule of its tectonic transports and emplacements is frontal imbrication. Based on the paleomagnetic and geological structure data of the structural belt,the belt has become a part of North China Plate since the beginning of Devonian,and it con-nected with Tarim Plate along Altun Fracture after Permian.The napping distance of the nappe structural belt has reached more than 200 km since Permian,of which about 100 kmwas done after Jurassic.In the course of its formation and development,the belt underwent NE-SW direc-tional tension from Z to O2,NE-SW directional compression from O3 to P,counterclock-wise rotation from T to J,and near SN directional compression after J.The nappe belt has controlled the range,basement shape,type of deposits and condi-tions for organic matter evolution and hydrocarbon preservation of the basin.Hydrocar-bon exploration areas thus can not be restricted in the front part of the nappe belt,but should also further extend into its inner part so as to discover oil pools in the nappe andthe overriding belt;hydrocarbon resources could not noly be found in Jurassic-Cretaceous Systems,but also in Permo-Carboniferous sediments.关键词：酒西盆地;推覆构造;古地磁;盆地演化;含油领域715|402|0更新时间：2023-05-30
- 摘要：The gas fields in Central Ordos Basin are in an unified and broad block.The gas in the fields is mainly from Upper Paleozoic coal measures.The principal evidences for this are:the δ13C values of the gas from Ordovician reservoirs are basically the same in wide areas and are well-matched or only have about 2‰ deviation with that of the gas from the Upper Paleozoic;the δ13C values of the gas-condensate light hydrocarbon monomeric molecule are consistent with that of condensate from Permo-Carboniferous;the δ13C val-ues are generally heavier than -25‰ and relatively enriched in heavier carbon isotope 13C;the carbon isotopes of the n-alkane,pristane and phytane all suggest that they are the products of high-matured coal measure source rocks and have a close parental rela-tionship with Upper Paleozoic coal measures.Besides,the compact rocks of O1m54 -O1m56 are overlained by gas productive rocks,whereas the compact rocks of O1m56 -O1m57 gas reservoir are poorly gas-bearing;bitumen are rarely present in the Lower Paleozoic rocks.关键词：鄂尔多斯盆地;天然气田;奥陶系;油气源;煤成气610|465|0更新时间：2023-05-30
- 摘要：Growth thrusts that were widespread in Tertiary deposits of Gasi fault subsidence in Qaidam Basin controlled the structural framework of the three main kinds of structures,and formed growth anticlines,drag anticlines and fault nozes.The tectonic evolution pro-cess could be divided into formation stage,growth stage and stagnation stage.As for the source rocks,that in the footwall of the thrust are characterized by high maturity and transformation ratio of organic matter,high oil saturation and excess pore-fluid pressures.The growth thrusts might act as the passage path for hydrocarbon migration.The growth structural traps derived from the thrusts generally have following favourable conditions:1.close to oil source,especially the growth anticlines which usually form hydrocarbon pools of lower formation generated-upper formation reserved type;2.long time and multi-stage of hydrocarbon supply due to early formed traps;3.abundance of oil source and multi-layer of oil supply.关键词：生长逆断层;柴达木盆地;尕斯断陷;牵引背斜;生长背斜;有机质成熟度;过剩孔隙流体压力;油气运移;石油聚集677|925|0更新时间：2023-05-30
- 摘要：Remote sensing images reveal that the nappe structures in Jurong Basin might relateto E-W or NEE striking arcuate linear structures in the basin.The tenso-shear fault linear structural system in Ningzheng Mountains that stretches into the basin once had been in-terpreted to be imbricate structures in seismic profile by mistake rather than nappe structures.According to v-circular structure-tonal anomaly model of remote sensing,hydrocar-bon tone halos are mainly located in the east side of Jurong gravitational high,suggestingthat the distribution of the halos is controlled by NNE-strike torsion structures and their subsidiary faults,and by NW-strike cross faults and near NS-directional faults.Thus thehalos could be considered as ground indication of hydrocarbon traps.It is proposed thatnon-seismic techniques such as remote sensing,geochemical exploration,radio activeprospecting should be strenghed in the study area,and a synthetic assessment model of hy-drocarbon traps should be established so as to make a break throug in its oil and gas explo-ration.This is the general trend for hydrocarbon exploration in Paleozoic and Mesozoic carbonate rocks in the middle and lower reaches of the Yangtze River.关键词：句容盆地;叠瓦状断层;张扭性断裂;断裂线性体;环形构造;油气色调晕圈;v-环-色模式;油气圈闭775|519|0更新时间：2023-05-30
- 摘要：According to the research result of carbonate rocks in Guizhou,North China and Songliao Basin,the diagenetic environment and diagenetic facies of the carbonate rocks were classified and summarized;some views concerning to variation properties and iden-tification markers of different diagenesis were proposed,and the relationship of various diagenetic environments to pore evolution,the formation and distribution of secondary pores were described.关键词：碳酸盐岩;成岩环境;成岩相;孔隙演化735|420|0更新时间：2023-05-30
- 摘要：According to geochemical data (including the data of simulated test of thermal degradation),the correlations between vitrinite reflectance and organic matter/residual carbon,H/C in kerogen were discussed and 13 correspoundent regression equations were given in this paper.关键词：干酪根;有机质热演化;降解残碳率;H/C—Ro关系595|794|0更新时间：2023-05-30
- 摘要：Lanliao fault belt on the east margin of Puyang Depression is a tensile fault belt formed in Yenshan Epoch.The belt,being 140 km long and 6-8 km wide,is situated close to a deep-depressed oil-generating belt in the west and the Luxi Uplift in the east.Most of the Mesozoic and Upper Paleozoic are absent in its upper wall,but sediments of various geological times are well preserved on its foot wall.The 3rd member of the Neogene Sha-hejie Formation is the main source rock.Along the fault belt,a lot of nose structures and subaqueous fans developed on the footwall,and buried-hills and bioherms on the upperwall.Hydrocarbon could be found on both walls.The main types of hydrocarbon traps in the study area are faulted-nose structure formed by basement uplift of the footwall,fault-nose resulted from the slope of slumping conglomerate on steep slope,bioherm,structural-stratigraphic trap and buried hill.关键词：东濮凹陷;兰聊断裂带;油气控制因素;入字型构造;圈闭类型;滑塌砾岩633|668|0更新时间：2023-05-30
- 摘要：This paper deals with the depth of diagenetic evolution,the coexistence and inhere-tance of diagenetic event,diagenetic anisotropy,the variation of pH value in diagenetic water and the reflection of diagenetic information on log curves.关键词：成岩作用;成岩演化;成岩相;成岩水;测井曲线836|550|0更新时间：2023-05-30
- 摘要：Middle Triassic in Shaya Uplift and the adjacent area is one of important exploration targets.Based on the analysis of hydrocarbon-bearing condition,a Middle Triassic drape structural play was identified by adopting play-analysis method.In the calculation and es-timation of hydrocarbon-bearing probability of exploration play and exploration prospect,the parameters of oil-gas pools,the number of drillable prospects as well as functional re-lationship of five geological variations,the above mentioned data and functional relation-ship were inputted in FASPUM.The result suggests that the play shows wonderful prospects in hydrocarbon exploration,and the amounts of recoverable resources are re-spectively 0.82543?108-3.9124?108T and 265.7?108-1453.0?108m3.Favourable tar-gets for hydrocarbon exploration are the central and southern parts of Ackule-Harahatang area.关键词：塔里木盆地;中三叠统;披覆构造;勘探层法;油气资源评价606|500|0更新时间：2023-05-30
- 摘要：Undeveloped oil reserve in Karamay Oilfield accounts for one-third of the proven oil reserve and is characterized by wide distribution,various reservoir types,complex in-situ condition and low produc-tion.The feasibility of developing this type of reserve is restricted by copious unfavourable factors,but it offers the advantage of economizing exploration cost and utilizing preexisting facilities in the deve-loped area.If a full use of it could be made,it will take an inestimable role in oilfield construction.In present paper,major geological and engineering factors that effect the reserve were analysed by application of development feasibility assessment technique.Based on the assessment of reserve reliabili-ty,water-injection method was selected,reasonable well spacing was determined,development index was predicted,and the economic assessment method of undeveloped oil reserve was proposed.The unde-veloped reserve was then classified as recoverable,hard to recover,unrecoverable and undetermined re-serves.In consideration of the economic effect of post-development,a set of indices(predominantly dy-namic)were optimized to economically classify the undeveloped reserve.The analysis examples have proved the realiability and coincidence of this economic classification and the criteria of the reserve assessment.关键词：石油储量;储量评价;储量经济分类;石油开发822|740|0更新时间：2023-05-30
- 摘要：吕华、苏云山、韩景行、王金琪、蔡乾忠、张国鼐等编著的《中国石油天然气的勘查与发现》一书,由地质出版社于1992年出版问世。这是一部油气勘查的科学论著,以地质矿产部门油气勘查的史料与重大事件为主线,油气发现为中心,油气理论、规律的总结为归宿,展现40年来我国油气勘查的发展历程、辉煌成就和理论建树。527|393|0更新时间：2023-05-30
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