最新刊期
卷 9 ， 期 2 ， 1988
- 摘要：The distribution and evolution of the hydrocarbons with skeletons of abie-tane, pimarane and kaurane in early diagenetic process, and the structural transformation of these diterpenoids under the condition of high temperature thermo-simulation, are discussed in this paper. The authors suggest that coal-bearing strata or source rocks rich in resinite are good source rocks of the lower matured oil and gas.599|560|0更新时间：2023-05-30
- 摘要：The suture zone between the south and north China Plates has long been disputed. One of the main arguments is which plate should the area between the south of Queshan-Feizhong fault and the north of Xinyang-Shucheng fault belong to. We have discovered Heliolites cf. anhuiensis,panderodus gracilis, Kirkbyella sp. and other fossils in the carbonate gravels of the bottom conglomerate of the Yangshan Formation in Shangcheng County,Henan Province. These fossils belong to the Early Paleozoic, and most likely to the Silurian. In the mean time, Protomonocarina sp. was found in the Huyuofang Formation near Feng-huang Primary School, Shangcheng County. The above Conchostraca fossils of the Middle Carboniferous were only found in the Benxi Formation, Kaiping Basin in North China. It shows clearly that the Late Paleozoic sediments in north Huaiyang are intimately tied up with the Carboniferous system in North China Plate. We have reason to consider that north Huaiyang and North China Plat-form were linked as a whole at least in the Carboniferous Period. Based on (1)Xinyang-Shucheng fault has the nature of ductile shearing:(2) A series of overthrust nappes thrust northward; (3) Ophiolite zoneand tectonic melanges are distributed along the fault; (4) 3T-type polysilicic muscovite and C-type eclogite discovered in Luoshan-Xinxian section of the fault are produced in low temperature-high pressure environments; (5) The fault was a sudden change zone in geophysic fields; (6) Paleogeomagnetic measurement shows that the paleolatitude of the sampling point in the Meishan Group was 25-28癗, and that of the sampling point of the Fuziling Groupwas 1-5癗. This indicates that there might have been a drifting process for the two groups in geological history. We thus consider that Xinyang-Shucheng fault is a geosuture line of the Daibie suture zone in north Huiyang. Therefore,hydrocarbon exploration range in the North China Platform may cross over Queshan-Feizhong fault, and may even extend to Xinyang-Shucheng fault.Whereas the coal-bearing formation of frontal depression in north Huiyang region is significant for coal-formed oil and gas.809|416|0更新时间：2023-05-30
- 摘要：Binnan Oilfield is located in the north of Shandong Province. It is one of the Shengli Oilfields. Commercial oil was discovered in Late Eocene basalts in 1982. The effective thickness of the basalt reservoir rocks is about 13.5m. The maximum porosity is up to 25%. The main pores are vugs resulted from lea-ching of augite and basic volcanic glass in the vadose zone. A part of the pore space is filled by vadose silts, vadose ooids and vadose pisolites. Favourable conditions for the formation of the basalt reservoir are:the basalts spreaded over high paleogeomorphic and paleotectonic position, and had a great deal of tec-tonic fractures which could provide lots of passages for meteoric water to flow,it was very favourable for the formation of basalt reservoir with bigger thick-ness and higher porosity.626|626|0更新时间：2023-05-30
- 摘要：Studied the isoprenoid hydrocarbons of 50 Oligocene samples collected from the Dongpu Depression, the authors found that there are much of phytane,regular iC25 and some regular iC17 in the sediments of high saline environment.They are probably derived from archaebacteria.616|441|0更新时间：2023-05-30
- 摘要：Meso-Cenozoic terrestrial petroliferous basins in East China are rift-valley basins developed in stretch tectonic system. They occur as graben-horst or half graben-half horst configuration and have no distinct compressive deformation.The fundamental factor is deformation of sedimentary rocks caused by gravity effect. The structural deformation resulted from lowering gravity potential is known as gravity structure. Based on seismic data, the authors divide the gravity structures in rift-valley basins into seven types by their origin:sliding fault steps,rollover anti-clines, tilted blocks, slide-dropped anticlines, nappe-gliding structures, com-pactional structures and diapiric structures. The motive force that caused the structures is the uneven density and un-stable gravity potential. Such motive force makes the gravity structures to dis-tribute in order in the basins and provides fine traps for the formation of oil and gas pools.710|422|0更新时间：2023-05-30
- 摘要：Longtan coal measures of the Late Permian in Meishan, north Zhejiang Province, is a suite of delta sediments with a thickness of 130-240m. Oil can be found in sandstones there. The coal is bark liptobiolite. Its suberinite con-tent is 44.98-65.47%, and the tar productivity of dry distillation 9.3-21.4%.The coal-formed oil is rich in isoprenoid, cycloalkane, C29 sterane and C29 re-arranged sterane. All the Pr/Ph, Pr/n-C17 and Ph/n-C18 are greater than 1.The main peak of n-alkane is at C19.593|731|0更新时间：2023-05-30
- 摘要：Solution pores are the main reservoir space of Fuyu reservoir in Fuyu-Xinli region. They are mainly particle solution pores, filler solution pores and particle-filler solution pores. The acid components that resulted in the solution pores were provided by organic matter which resulted from kerogen deacidify,thermo-catalysis and thermo-transformation in middle diagenesis from overlain dark mudstone and shale of the first member of the Qingshankou Formation.The formation of the pores is not only effected by original texture and composi-tion of sand beds, but also closely related to rigional structure position (such as syngenetic structure apex), faults and fractures. A stable and appropriate tectonic condition may be particularly favourable for long term seepage and complement of acid water, and may result in various kinds of solution pores,especially feldspar pores.598|398|0更新时间：2023-05-30
- 摘要：Fuping region on the southern margin of the Ordos Basin was a distinct carbonate depositional slope in the Middle Ordovician. The characters are:1. It contains carbonate gravitational flow deposition which is the special of slope zone:2. The typical structures of slope deposition, such as rollover structure,truncated structure, rub-fold structure and slide-fold structure, well developed; 3. Though palaeoslope fossils are not rich enough In the present area,deep-water ichnofossils and microfossils developed well. 4. Trace elements as V.Ni.Sr. and Ba.show high content in the rocks; 5. The trend of the slope ranges from 128-177?, ichnofacies belong to Zoophycus and Nereites.This indicates that the water depth of the slope varied from 200 to 2000m, the average rate of sedimentation might be 318mm/1000 yrs.664|789|0更新时间：2023-05-30
- 摘要：This paper describes the method determining "gas marks" by the data of neutron log and density log. The main formulas used in this paper are quoted from Schlumberger.558|411|0更新时间：2023-05-30
- 摘要：The N-S stretched thrus nappe belt in west Ordos Basin is 600 km long and 50-100km wide with an area of 4500km2.It is composed of N-S trending struc-tural belt of the North China Platform in the east and the Liupanshan arc structural belt of Qinling-Qilianshan geocline in the southwest. The progres-sional solution of Laplace equation is used in this paper to make analytic con-tinuation on gravity data of the present area. The nature and distribution of the slip surface of the nappe belt and the property of its deeper structures are explained as follows:Zhuozishan Section:There are two slide surfaces in this section. One is the boundary surface between E-W trending high density-strong magnetic body and NNW trend high density-weak magnetic body (the Qianlishan Group),the other is the soft layer between Carboniferous-Permian coal measure and Cambrian-Ordovician limestones. Yinchuan Section, The gravity low of Yinchuan is the reflection of Yinchuan graben. The gravity high of Niushou and Helan Mountains are the reflection of shallow structures:the gravity high of Hengshanbao and Majiatan reflects structural skeleton below T9 and autochthonous rock bodies below the nappes respectively. The South Section:The gravity positive anomaly to the west of the Qing-tongxia-Guyuan rift (that is the arc structural belt of the Liupan Mountains)shows the structural property of allochthonous rock bodies. The area to the east of the rift shows gravity high and unevident feature of overthrust. It may be dominated by thrust and horizontal displacement. The fault surfaces of N-S thrust belt of the present area dip west, the tilt angles of the shallow parts are steep and the deeper parts are gentle;the north section is gentle and the south section is steep with local parts inversed. The strike of deep-seated geological bodies streches nearly EW in the north area and nearly SN in the south area. There is most likely a huge fault along Zhongning-Zhongwei line between these tow sections.616|455|0更新时间：2023-05-30
- 摘要：Through the observation of the profiles at Maqiao in Nanling, Yueshan inAnqing and Anjicun in Nanjing, the member of breccia, variegated shale and purple sand-shale are found to be successive sedimentation. Their occurrences coincide with each other and discord with underlying Qinglong Group. So the authors suggest that the breccia member should be the basal boundary of the Huangmaqing Group. According to the texture and composition of the breccia member and the differentia between upper and lower structures and their un-comfornity, we consider that Jinzi Movement, the main episode of the Indo-sinian Movement, is a presence.668|585|0更新时间：2023-05-30
- 摘要：The formation of shallow-layer oil and gas pools is controlled by structure and depositional cycles. Under specified geological and structural conditions,shallow-layer oil and gas pools may form whether in inherited depressions of oil generation, or in the depressions formed during the later period. Immatured crude oil is recently discovered above the depth of oil generation threshold (2200m) in the Jianghan Basin except matured crude oil produced by washing oxidation or biodegradation. They can be divided into two types such as in situ oil and heterotopical oil based on their migration and accumu-lation. There are geological and geochemical environments to form shallow-layer oil and gas pools in the Jianghan Basin. Potential areas for shallow-layer oil and gas exploration are mainly in the slope zones, marginal fault zones, erosional areas and uplift zones adjacent to oil-generating depression.559|486|0更新时间：2023-05-30
- 摘要：关于周口坳陷的构造特征,过去多认为中、新生代时期,构造应力以拉张性为主,形成北西西向及北东东向的两组主要断裂,并形成众多的拉张型断陷,1985年以前未发现逆断层。 经近两年的工作,随着勘探及研究工作的深入,首次在周口坳陷东部发现逆断层。这对于探讨该区构造特征及盆地形成机理、寻找油气勘探的有利地区都有一定意义。598|482|0更新时间：2023-05-30
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