It is essential to intensify research on the strike-slip tectonic system in West and Central Africa to better understand regional tectonic evolution and achieve future breakthroughs in oil and gas exploration. Based on the structural interpretation of extensive seismic data and stratigraphic paleontological analysis of more than 50 wells, this study investigated the tectonic history, sedimentary filling, and evolution of the rift basins in the West and Central Africa, and identified a novel type of intraplate strike-slip tectonic system. It exhibits the following characteristics: (i) the strike-slip tectonic system in the West and Central Africa consists of the Central African Shear Zone (CASZ) and two rift branches, manifesting as an N-shape; (ii) most of basins and rifts are characterized by rapid subsidence at one end and substantial sedimentary thickness; (iii) two types of strike-slip basins are developed, namely the transform-normal extensional basin (TEB) along CASZ and the strike-slip-induced extensional basin (SEB) at each end of CASZ; (iv) two types of basins display their own temporal and spatial evolution history. TEBs underwent two rifting stages during the Early and Late Cretaceous, with a strong inversion at the end of the Late Cretaceous. SEBs experienced three rifting stages, i.e., the Early Cretaceous, Late Cretaceous, and Paleogene, with a weak inversion; and (v) this strike-slip tectonic system was formed under intraplate divergent field, indicating a new type of system. This discovery enhances understanding of the breakup of Gondwana and provides valuable guidance for future oil and gas exploration.

The Paleozoic (Carboniferous) Amotape Formation in a metamorphic-rock buried hill in the Talara Basin, Peru is an important regional exploration target, where a series of oil and gas reservoirs have been discovered. The daily oil production of Well EA2311 located in the La Guna buried hill in Block X, Peru is 2,890 barrels per day, and the cumulative oil production of Well EA2294 is 1.1 million barrels, indicating that this region has broad exploration prospects. Paleozoic metamorphic-rock buried hills have complex reservoir conditions, and the types and controlling factors of reservoirs in the buried hill remain unknown. These factors restrict oil and gas exploration in this region. Based on paleogeomorphology analysis and by making full use of data such as core data, thin-section analysis data, scanning electron microscopy (SEM) data, well log data, and seismic data, this paper analyzes the conditions for the formation of Paleozoic (Carboniferous) metamorphic-rock buried-hill reservoirs in the Talara Basin, Peru, determines the types of reservoirs, and reveals the main factors controlling the development of fractures in such reservoirs. The results of this study show that the main types of rocks in the Carboniferous Amotape Formation are quartzite and slate, and gneiss and phyllite have developed locally in this formation; the reservoirs are fractured and porous, which can be classified into weathering crusts and inner reservoirs in the vertical direction; the level of development of fractures is related to the thickness and purity of quartzite and the transformation by paleo-tectonic stresses. This understanding provides valuable guidance for the selection of favorable exploration zones in buried hills and the search for the subsequent exploration direction.

Based on the analysis of the growth process of the southern boundary fault (FS), the location, type and characteristics of transfer zone developed at the Su south steep slope zone was studied. The control of this transfer zone on the sandbodies deposition at the steep slope zone during the Abu Garba syn-rifting period and the prediction of favorable area for forming lithological reservoirs as well as their accumulation model were also analyzed. Result shows that Southern boundary fault was composed by two segment faults and a synthetic transfer zone between two adjoining segment faults developed along this fault. This zone has an obvious impact on the the sandbodies depositing at the steep slope belt during Abu Gabra syn-rifting period, Sand ratio has an abnormally higher value in the position close to the transfer zone than that developed far away from transfer zone. The mode of transfer zone controlling the sandbodies deposition could be divided into two types. There is a potential favourable area for exploring the lithogical reservoirs at the steep slope belt, which is close to the hydrocarbon generation and expulsion center, located in the updip direction of the transverse anticlines and on the paths of oil and gas secondary migration.

The Santos Basin is a globally hydrocarbon exploration hotspot. In the past decade, a large number of major discoveries have been made in pre-salt plays in ultra-deepwater areas of the Santos Basin. The current drilling and seismic data in the Santos Basin record at least five stages of magmatic activity, forming two types of basic igneous rocks, namely, flooding facies basalt and intrusive facies diabase. Three periods of magmatic eruption activities during the early Cretaceous were recorded in the pre-salt lacustrine strata. According to the spatial development characteristics of volcanic rocks, two types of volcanic edifices can be identified, namely, fissure-type and central-type. Among them, fissure-type volcanic edifices are distributed along faults with a wide range of distribution, which are the main types of volcanic edifices in the basin. While the central-type volcanic edifices are characterized by small-scale volcanic conduit facies. According to the depositional environment, it can be further divided into subaqueous effusive facies (the second stage of igneous rocks, such as the basalt developed in the same period of the deposition of the Itapema Formation in the northeast oil field of the East High), subaerial effusive facies (the third stage of basalt during the period of deposition of the Barra Velha Formation of the third stage in the southwest basin, which is mainly formed in the Central High inside the Central Sag) and transitional effusive facies. According to the integrated interpretation of gravity, magnetic and seismic data, it is pointed out that strike-slip faults and extensional faults control the spatial distribution of pre-salt igneous rocks in the Santos Basin, while the large-scale volcanic edifices control the tectonic framework of the basin. The volcanic rocks developed on a large scale in the first and third stages have significant constructive effects on the paleogeomorphology of carbonate build-up at the end of the rift stage and sag stage, and ultimately control the distribution of favorable reservoir facies belts of lacustrine carbonate rocks.

According to the characteristics of the Pacific plate subduction plate boundary, the geometric variations of the Andes arc and back-arc foreland basin system, the Andean foreland basin system is generally divided into three tectonic domains. Based on the analysis of the tectonic-sedimentary evolution of typical sedimentary basins in the eastern piedmont of the Andes in South America, the tectonic evolution process of basins in different tectonic domains and the sedimentary filling characteristics of tectono-stratigraphy are summarized. The northern basins focus on the analysis of the Oriente Basin in Ecuador, which is composed of three tectono-sequences upwards, namely, the rift tectono-sequence, the continental margin tectono-sequence, and the retroarc foreland tectono-sequence. The foreland tectono-sequence has only one depozone characterized by the foredeep. The central basins focus on the analysis of the Ucayali Basin in Peru, which developed three types of prototype basins, namely rift basin, craton marginal basin and back-arc foreland basin. The tectonic compression at the end of the Cretaceous led to the activation and inversion of early normal faults. The shallow structural reservoirs in the basin are mostly related to the deep fault inversion at the foreland stage. This type of foreland basin is divided into four depozones in the east-west direction, namely, wedge-top, foredeep, forebulge and backbulge. The southern basins focus on the analysis of the Neuquén Basin in Argentina. The structural deformation style is basement-involved type, which has undergone tectonic evolution of rift, post-rift and foreland. The foreland basin of this type can be divided into five tectono-sedimentary units in the east-west direction: wedge-top, foredeep, forelimb, basement-involved uplift and backlimb. According to the comparative analysis of the tectonic styles and sedimentary filling characteristics of the Andean foreland system in South America, the sedimentary filling patterns of the Andean foreland basin can be divided into three types, namely, the foreland basin with a single foredeep, the classical foreland basin and the broken foreland basin. The above analysis of Andean foreland basin will be helpful to the evaluation of oil & gas exploration and the optimization of new overseas exploration projects in this area.

Based on the analysis of reservoir characteristics and crude oil geochemistry, the formation mechanism of differential oil gravity enrichment in the J oilfield in the slope zone of the Oriente basin is revealed, and it is pointed out that the structural down-dip area of the structural-lithologic reservoir in the slope zone is a favorable area for medium oil, which providing a solution for the exploration and development of structural-lithologic traps in the slope zone of the oriente basin. The results show that the J reservoir is a structural-lithological reservoir with a southwest dipping monoclinic structure in general, and a NW-SE trending mudstone belt developed in northeastern structural high to provide structural up dip sealing condition for the reservoir; The oil-source correlation analysis confirms that the crude oil in the reservoir is related to the marls of the Cretaceous Napo Formation; The dating of fluid inclusions reveals that the Cretaceous reservoir in the slope zone was formed in Miocene and experienced multiple stages of hydrocarbon charging. The results of geochemical analysis verify that the crude oil in the J reservoir is a mixture of the degraded oil filled at the early stage and the conventional oil charged at the late stage. Differential mixture of hydrocarbon accumulation is the main reason for differential oil gravity (API) distribution in the J reservoir. Comprehensive analysis predicts that the low part of the structural-lithologic trap in the slope zone is a favorable area for the enrichment of medium quality oil.

The Andean fold-thrust belt in the northwest of the Madre de Dios Basin in Peru is a geologic structure where multidirectional tectonic stresses converge, and its structural complexity is higher than that of other areas of the basin. The Permian gas reservoirs in the basin are controlled by this fold-thrust belt, and the distribution of gas reservoirs varies greatly in different tectonic belts. By investigating the structural characteristics of the fold-thrust belt and the characteristics of faults in the fold-thrust belt and the distribution of the fold-thrust belt, this paper identifies the mode of tectonic evolution of the fold-thrust belt and summarizes the formation mechanism of the fold-thrust belt. The results of this study shows that three thrust belts have formed in the north, middle and south under compressional stresses in the southwest and south directions. Due to differences in the directions and magnitudes of tectonic stresses acting on the three belts, these belts trend NW-SE in the north, nearly E-W in the middle, and E-W in the south. The traps discovered in the study area exhibit a trend of increase in both number and area from south to north. This understanding provides valuable guidance on the optimal selection of favorable exploration targets and the search for the subsequent exploration direction.

The Mishrif formation in H oilfield of Iraq is primarily characterized by lagoon deposits in the MB1–2 interval, consisting mainly of packstone and a small amount of wackestone. The reservoir exhibits a high degree of heterogeneity, and the effectiveness of water flooding is unclear, requiring further investigation. Based on extensive core and thin section observations, combined with core analysis, well logging, and seismic data, it is recognized that the MB1–2 interval was deposited in a semi-restricted platform environment, controlled by fourth-order cycles, with tidal channel deposits as the typical characteristic. The reservoir is predominantly developed in the upper part of the cycles, within packstone layers, characterized by foraminiferal pore cavities, bioturbation mold pores, and matrix micropores. Non-fabric-selective dissolution pores, such as dissolution pores and microfractures, are also present. The cemented hardground section forms barriers within the reservoir. Logging characteristics show relatively high natural gamma values, low density values, high neutron porosity, and high resistivity, along with relatively low gamma and high-density thin layers representing interbeds. The development of the reservoir indicates that it formed during the tidal channel development stage in the late stage of sequence evolution, experiencing atmospheric water dissolution and modification after the exposure of the lagoon environment. Strong localized dissolution and modification have resulted in the formation of effective reservoir zones. By combining natural gamma inversion with seismic impedance inversion, the spatial distribution of this type of reservoir was predicted, revealing that it mainly develops in the upper part of the cycles and exhibits a patchy distribution on the plane. The research findings presented in this paper hold significant implications for enhancing the development efficiency of H oilfield in the Middle East and understanding the heterogeneity of bioclastic limestone reservoirs in other oilfields within the Mishrif formation.

The Muglad basin is a continental rift basin during the Mesozoic-Cenozoic on the southern Central Africa Shear Zone (CASZ). The Fula sag is a hydrocarbon-rich depression in the north of Muglad basin. With the improvement of exploration degree, Fula sag has been in the stage of fine exploration for complex fault blocks. Therefore, strengthening the study of fault characteristics and evolution will help in deepening the understanding of the hydrocarbon accumulation rules in this area and guiding the next step of oil and gas exploration. Taking Fula sag as an example, the characteristics, evolution of faults, and their controlling effects on hydrocarbon in the study area were analyzed. Conclusions are listed as followed. We have obtained innovative knowledge as followed: faults in the study area can be divided into three levels and five combination features; continuously active faults control the formation of “inherited” sag; faults in Fula sag have a controlling role in the development of hydrocarbon source rocks and central reservoir assemblages in the AG Formation. The research results have been applied in exploration deployment.

The Sufyan sub-basin is located in the northwestern part of Muglad Basin, Sudan. Because the basin was greatly affected by tectonic activities of the Central African Shear Zone, faults greatly developed and structures are complex, especially in the Sufyan sub-basin. Fluvio-deltaic sandstones within the Abu Gabra Formation represent the primary reservoir. There are great exploration potential of the AG2 interval. The interval is mainly characterized by interbedded mudstones and sandstones. The sand layers are thin and change rapidly in lateral, which brings difficulties in reservoir characterization. The constrained sparse spike inversion (CSSI) is used to predict the reservoir in the Sufyan sub-basin since it does not rely on the model, its accuracy merely depends on the characters of original data. Reservoir distribution characteristics of five layers in AG2 was studied using precise synthetic seismogram calibration, seismic interpretation of complex faulted blocks and seismic inversion. The inversion results, in good agreement with the drilled wells, show that sandstones are well developed in the northern part of the sub-basin. This study provides a guideline for improving well deployment and exploration strategies in the future. This study proves that CSSI can be applied as a rigorous, industry-standard inversion technique in the Sufyan sub-basin, and to recommend further application to much larger data sets in the basin.

The Tarim-Qaidam collision occurred along the southeastern margin of the Tarim Craton in the Early Paleozoic. This collision resulted in the formation of the Altun Suture, a Proto-Tethyan suture. It is one of the northernmost suture zones in the Tethysides. This Proto-Tethyan suture was not re-opened during the period of Paleo-and NeoTethyan history, and, of course, no Paleo-or NeoTethyan suture was superimposed on it. The collision-related structures in response to this collision are well-preserved in the Tarim Basin. They were discovered during our careful seismic interpretation. The syn-collision structures mainly include a foreland fold-thrust belt (the Tangguzibas foreland fold-thrust belt) and three large basement-involved anticlines (the Lunnan, Tadong and Tazhong anticlines). While the post-collision structures are a series of normal faults and their combinations of en echelon fault zones. From the deformation characteristics of these syn-collision structures, it was inferred that their related collision occurred in the southeastern margin of the Tarim Craton. It is the Tarim-Qaidam collision which resulted in the formation of the Early Paleozoic Altun Suture. Analyzing the growth strata, un-conformities, fault growth index and the strata involved in the collision-related deformation, the syn-collision structures were formed in the Late Ordovician to Early Silurian, and the post-collision structures in the Middle Silurian to Middle Devonian. It can be fairly deduced that the Tarim-Qaidam collision initiated in the Late Ordovician, lasted to the Early Silurian, and then evolved into the post-collision extensional stage of the Middle Silurian-Middle Devonian.

基于渤海湾盆地牛庄洼陷的3D地震精细构造解释成果,本文揭示了伸展盆地内部正断层由旋转正断层向连通的铲式正断层递进演化过程,该演化过程划分为4个阶段:以旋转平面型正断层为主要类型的初始阶段,以多米诺断阶为主要类型的发展阶段,以单条独立铲式正断层为主要类型的成熟阶段以及以连通铲式正断层为主要类型的高成熟阶段;并建立了在伸展量的递进增加且浅层存在滑脱层的地质条件下,旋转平面型正断层向铲式正断层递进演化模式.通过分析研究区剖面伸展量数据以及系列断层断距的变化,认为伸展量在不同级别断裂(主干断裂与次级断裂)之间的分配方式是研究区该递进演化过程的主控因素.本文提出的伸展盆地内部正断层递进演化过程及其模式将有助于丰富与完善伸展盆地正断层递进演化理论,同时也可为伸展量较大的背景下,正断层样式演化程度较低的现象提供一种新的成因解释.

Based on systematic study on stratigraphic division, fault characteristics and reservoir forming mode, the fault development characteristics of Sharaf-AG low uplift and its control on reservoir formation is clarified. Considering the regional structure evolution, stratigraphy sequence, seismic reflection pattern and stratigraphic contact, the study area is divided into early strongly deformed Basement structural layer, AG-Bentiu rift depression structural layer, Darfur-Amal rift depression structural layer and Tendi-adok rift depression structural layer from the bottom to the top. By analyzing the trend, density and extension distance of faults in different periods, the author believes that there are three-level fault systems in the study area. The differences of fault growth rate curves show that the activity intensity of faults at different structural locations are obviously different, and the development of stratigraphic strata are also different. The analysis of the reservoir forming model in the structural belt shows that the faults play an important role in the process of oil and gas accumulation. They are not only an effective channel for oil and gas upward migration, but also an effective lateral sealing of the reservoirs. These understandings directly guide the oil and gas discoveries in the area in recent years.

West and Central African superimposed rift basins are Meso-Cenozoic multicycle intra-continental rift basins developed on the Precambrian crystalline basement. Previous studies mainly focused on the formation and superimposition process of several prototype basins developed in a single superimposed basin, but it is rarely documented that research on the different contemporaneous complex superimposed rift basins in the same tectonic region as well as those superimposed rift basins with different prototypes basins in vertical through time has been carried out. Based on the geological, geophysical, and geochemical data obtained during the oil and gas exploration activities in the West and Central African superimposed rift basins recently, combined with the previous research results, this paper focuses on the basin evolution, formation and superimposition process of prototype basins through time of the West and Central African superimposed rift basins. Results show that since the breakup of Gondwana, affected by the relative movements among the Northwest African block, the Northeast African block, and the Central and South African block of the African continent and the tectonic events of the surrounding plates, the West and Central African superimposed rift basins have roughly experienced three phases of tectonic evolution, namely, Early Cretaceous, Late Cretaceous and Paleogene-Neogene. Early Cretaceous evolution phase is the key period of the formation and evolution of the rift basins, during which the boundary faults of these rift basins develop and act intensively. Three types of prototype basins are developed, including rift basin, strike-slip pull-apart basin and aulagu basin. Basement subsidence of these rift basins is the largest with the fastest subsidence rate among the total subsidence. Lower Cretaceous sedimentary filling has the largest percent in the total filling, and sedimentary systems in whole rifts system are non-marine elastic deposition. During Late Cretaceous evolution phase, these early prototype basins were inherited. However, the difference in rifting and the sedimentary filling among those rift prototype basins become larger. The Early Cretaceous sedimentary system also evolved into a marine-continental sedimentary system. During Paleogene-Neogene, the evolution of West and Central African superimposed rift basins became more complex, and the difference was further intensified. The rifting, strike-slip and compression-reversion occurred simultaneously in different basins, during which the rift prototype basins or inversion deformation developed. According to the differences in prototype basin type, sedimentary filling and vertical superimposition of the prototype basins in these three phases, these superimposed rifts in Central and Western Africa are divided into two types, inherited superimposed basins and reversed superimposed basins. They are further divided into eight subtypes, namely, early-developed superimposed basins, successive superimposed basins, dynamic superimposed basins, late-developed type I superimposed basins, late-developed type II superimposed basins, and rift-inverted superimposed basins, aurora-inverted superimposed basins, and strike-slip-inverted superimposed basins. The characteristics of different types of superimposed basins are discussed. These results are of great significance for deepening the understanding of the geological evolution of superimposed rift basins and guiding the search for favorable oil and gas enrichment areas and exploration activities in such basins worldwide.

地震资料解释和野外地质调查,在塔里木盆地南部发现中生代碰撞相关构造.同碰撞构造发育于西昆仑山前、阿尔金山前和麦盖提斜坡,为晚三叠世冲断构造.既有晚三叠世新形成的冲断构造,也有先存构造的复活(如车尔臣断裂).碰撞后构造见于西昆仑和阿尔金山前,是一些规模不大的侏罗纪—白垩纪正断层及其控制下形成堑—垒构造.晚三叠世构造应力场的最大主压应力方向,在西昆仑山前和麦盖提斜坡均为NNE-SSW;冲断方向是由造山带向塔里木盆地,在麦盖提斜坡有反冲.它们是塔里木板块南缘一次碰撞造山的同碰撞构造.这是北羌塘—塔里木碰撞,是古特提斯洋复杂的闭合过程中的一次重要的构造事件.塔里木南部的侏罗纪—白垩纪伸展构造是其碰撞后构造.

Research on strike-slip faults and their control on the accumulation and distribution of oil and gas in petroliferous basins plays an important role in guiding oil and gas exploration activities. Based on the interpretation and analysis of seismic and drilling logging data, the geometry, evolution process, genetic mechanism and control on the accumulation of oil and gas of strike-slip faults in the Termit Basin are studied by applying coherent techniques. The results show that the strike-slip faults in the Termit Basin are mainly developed in the Trakes Slope in the eastern margin of the basin. The principal displacement zone of these strike-slip faults extending mainly in NNW-SSE and NW-SE, their en-echelon extension fractures (T fracture) are in south-north trending with dextral movement and right-lateral stepping. Most of these strike-slip faults are transtensional faults with few transpressional faults. Negative flower structures and Y-style fault combinations are widely developed, while straightly steep faults andpositive flower structures are locally developed. These strike-slip faults are the result of Cretaceous normal faults subjected to later shear stress in Paleogene Eocene Oligocene. The strike-slip mechanism is that differentially transverse compressive stress between blocks induces shear deformation of early normal faults. Since the Paleogene, the collision accumulation effect of the Eurasian plate and the African plate has formed a near-EW compressive stress inside the African plate. The nonhomogeneous distribution of stress at the northern boundary of the African plate caused differential movement between the Northwest African block and the Northeast African block, which induced the transformation of the Early Cretaceous normal faults on the Trakes Slope into a transtensional strike-slip faults. This series of strike-slip faults formed a group of antithetic fault block traps in Paleogene Sokor1 Formation,Sokor2 Formation and the Upper Cretaceous Yogou Formation, and these strike -slip faults are also vertical migration channels for oil and gas, which are beneficial for the hydrocarbon generated by Upper Cretaceous source rocks to migrating upward and accumulating in the Paleogene reservoirs.

KN area is located in the East of KN depression in Muglad Basin. It has lower exploratory level, only two-dimensional survey lines are distributed in most areas before, and the quality of seismic data is poor. Three wells have been drilled in this area, only one well has low oil production in Bentiu formation, and the other two wells have failed. However, oil was discovered in multiple targets in H area, which is in the SouthEast of KN area. In order to evaluate the oil and gas potential of KN area, combined with the new seismic data of KN 3D area, it is carried out of comprehensive geological and geophysical research work in KN area. By means of well correlation, precise seismic interpretation, tectonic evolution analysis and drilled wells analysis, and comparing with the reservoir forming conditions of adjacent H area, it is concluded that the oil source fault and forming time of traps are the important factors to form the oil and gas reservoir. On this basis, the residual potential of KN area is reevaluated, and it is concluded that the Eastern fault step zone is a favorable area for further exploration.

中西非叠合裂谷盆地是发育在前寒武系结晶基底之上的中-新生代多旋回陆内裂谷盆地,以往的研究主要针对跨不同世代、不同性质原型盆地叠合构成的盆地,但对于由多期裂谷活动形成的叠合裂谷盆地,其叠合改造模式及其动力学机制研究尚不深入.本文基于近年来在中西非裂谷系油气勘探开发中获得的有关地质、地球物理和地球化学资料,结合前人研究成果,重点研究了中西非裂谷系盆地演化阶段、不同阶段原型盆地发育特征、多期叠合、改造类型、模式及其动力学背景.研究表明,自冈瓦纳大陆裂解以来,受非洲大陆周缘板块构造事件及西北非陆块、东北非陆块和中南非陆块间相对运动的影响,中西非裂谷系盆地大致经历了早白垩世、晚白垩世、古近纪-新近纪三个构造演化阶段.早白垩世阶段断裂活动最为强烈,是裂谷盆地主干断裂形成时期,在不同构造部位发育了裂谷盆地、走滑-拉分盆地和坳拉谷盆地三类原型盆地,盆地基底沉降速率最大,地层沉积充填厚度大,沉积体系均为陆相碎屑沉积,奠定了裂谷盆地形成演化的基础;晚白垩世阶段,早白垩世原型盆地继承发展,但盆地间裂谷发育程度差异性凸显,沉积充填特征差异变大,由早白垩世统一陆相沉积体系演变为海、陆相并存的沉积体系;古近纪-新近纪阶段,该裂谷系盆地发育变得更为复杂,差异性进一步加剧,裂谷作用、走滑作用和挤压反转作用在不同盆地同步发生,期间可持续发育裂谷盆地或发生挤压反转和构造变形.根据三个阶段原型盆地在盆地性质、沉积充填、垂向叠加、构造变形等方面的差异,将中西非叠合裂谷盆地划分为"继承叠合型"和"反转改造型"两类,进一步划分为"早断型"、"继承型"、"叠加型"、"晚断Ⅰ型"、"晚断Ⅱ型"以及"裂谷盆地反转型"、"走滑-拉分盆地反转型"、"坳拉谷盆地反转型"八种,并讨论了不同类型叠合盆地特征及其动力学背景.这些成果对于深化裂谷盆地形成演化地质认识,指导在全球该类盆地中优选油气有利富集区和油气勘探均具有重要意义.

F Sub-Basin located in NE of M Basin which is a typical rifted basin in Sudan. With the progress of exploration and development for more than 20 years, remained traps are limited with small area, deep targets, and complex structure and the difficulty increased for exploration and development. More challenges come out for: 1) poor data quality and mis-tie of 2D and 3D seismic data of deep targets resulted from different acquisition and processing parameters in different time; 2) uncertainty and difficulty of identifying faulted traps on deep targets from complex geological conditions. More researches and methods have been tested to solve the problems. Finally, some new integrated trap identification technologies have been formed, such as integrated interpretation with processing technology, integrated seismic interpretation technology with geology and integrated seismic interpretation technology with time and spatial data etc., and new faulted traps which hadn’t been found with normal interpretation methods before have been identified and new break-through have been made for deep targets of AG in old oil fields. It is sure that systematic progressive exploration and development and the application of integrated trap identification technology are efficient ways for less input, more output and early benefit for complex faulted basin.

通过地震资料解释,首次在塔里木盆地东部发现了古生代中期的伸展构造.它们是一系列正断层,以及由这些正断层组合成的雁列状张扭性断层带.正断层走向近N?S;雁列状张扭性断层带分两组,走向分别是NE?SW和NW?SE,构成一个共轭体系,显示近E?W向的拉张作用.根据断层生长指数、断层断开的地层单元和断层断距变化的解析,这些伸展构造的形成时间是中志留世—中泥盆世.它们是原特提斯阿尔金早古生代碰撞造山带的碰撞后构造,是判定塔里木地块—柴达木地块碰撞造山作用结束时间的重要证据.