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1.
Processes of normal fault evolution in a siliciclastic sequence: a case study from Miri, Sarawak, Malaysia 总被引：1，自引：1，他引：1
Detailed field observations of normal faults formed at shallow depth in a deltaic sand–clay sequence near Miri, Sarawak are used to study the main structural elements during the early stages of fault development. We studied over 450 segmented faults, many of which contain clay smear, in an excellent outcrop exposing a collapsed crest structure.In agreement with previous studies we find that important elements of fault zone evolution are: (i) clay smear, (ii) telescoping on parallel strands, and (iii) preferred deformation of fault-bounded lenses. We model the consequences of telescoping on parallel strands and conclude that the reliability of juxtaposition diagrams can decrease dramatically in the presence of undetected multiple fault strands. The across fault connectivity can either increase or decrease depending on small variations in many of the input parameters.All the faults studied have a continuous clay smear over the interval studied, except for the places where a sand bed has an offset smaller than its thickness, and therefore has not moved past clay. Although on average the clay content observed correlates well with the average clay content of the faulted section, there are large variations in clay content controlled by local complexity in deformation. Understanding of this local complexity is a prerequisite for further improvement of clay smear in the subsurface. 相似文献
2.
断裂带是一个宽度、长度和高度均与断距呈正比关系的三维地质体,具有典型的二分结构：即断层核和破碎带。断层核由多种类型的断层岩和后期胶结物组成,具有分选差,粘土含量高,颗粒粒径小等特征,表现为具有比围岩更低的孔渗性。破碎带同围岩相比发育大量的裂缝,裂缝的密度随着离断层核距离的增大而逐渐减小,孔渗性较高。断层岩类型取决于断移地层的岩性、成岩程度和断裂变形时期。对于同生断层而言,泥岩和不纯净的砂岩主要发生泥岩涂抹作用;纯净砂岩发生解聚作用,形成颗粒重排的变形带。中成岩阶段发生断裂变形,泥岩发生泥岩涂抹作用,不纯净的砂岩发生碎裂作用和层状硅酸盐涂抹作用,形成碎裂岩和层状硅酸盐 框架断层岩;纯净砂岩主要发生碎裂作用,形成碎裂岩。晚成岩阶段发生断裂变形,碎裂作用成为主要的变形机制,泥岩破碎形成大量断层泥,不纯净的砂岩和纯净的砂岩均形成碎裂岩,其中纯净砂岩形成的碎裂岩由于石英的压溶胶结变得更致密。因此不同成岩阶段、不同岩性形成的断层岩类型不同,泥岩涂抹的排替压力高于层状硅酸盐 框架断层岩和碎裂岩,即使都是碎裂岩,其渗透率相差7个数量级。从断裂带结构看油气运移和保存,断层垂向封闭主要靠剪切型泥岩涂抹的连续性,侧向封闭能力取决于断层岩物性,物性很高的碎裂岩自身封闭能力很差,依靠两盘岩性对接封闭油气,最小断距决定油水界面位置。物性很低的断层岩一般能封住一定高度的油气柱,其是断裂带中泥质含量的函数。断层在储盖层段变形机制差异,决定了断裂输导与封闭油气的耦合,即破碎带双向输导充注,盖层段剪切型泥岩涂抹顶部封闭,断层核遮挡成藏。 相似文献
3.
Joyce Schmatz Marc Holland Steffen Giese Wouter van der Zee Janos. L. Urai 《Journal of the Geological Society of India》2010,75(1):74-88
The aim of this study is to improve our knowledge of the processes that lead to clay smear during faulting of a layered sand-clay
sequence in an analogue sandbox model. We carefully characterized mechanical properties of the materials used by a series
of geotechnical tests. Displacement field was quantified using PIV (Particle Image Velocimetry). The model is water-saturated
to allow the deformation of wet clay and sand in one experiment comprising a sand package with a horizontal layer of clay
above a predefined rigid basement fault. The thickness and rigidity of the clay layer are the parameters varied in this study.
The model shows a range of structures that are related to competence contrast between sand and different clay types. Results
show ductile shearing of soft clay with a transition to brittle fracturing of stiff clay accompanied by the formation of rotating
clay blocks in the fault zone. Localized deformation is observed through time showing (i) the propagation of one active fault
migrating laterally through the sediment package, and (ii) the formation of a stable prism between two or more active faults
that gets progressively smaller with minor rotation of the hanging wall fault. Continuous clay smear is observed resulting
from the lateral injection of clay as well as from a reworked mixture of sand and clay. 相似文献
4.
Faults can act as either conduits or barriers for hydrocarbon migration, because they have complicated anisotropic flow properties owing to their complicated three-dimensional structures. This study focuses on the Zhu I Depression, Pearl River Mouth Basin (PRMB), China. In this area, hydrocarbon migration and accumulation occurred over a relatively short period of time and were contemporaneous with fault activation, so the characteristics of hydrocarbon accumulations can be used to deduce the effect of active faults on hydrocarbon migration and accumulation. This study addresses the effect of fault activity on flow properties during hydrocarbon migration through a quantitative and comparative analysis of fault activity vs hydrocarbon accumulation. The fault slip rate and shale smear factor parameters were used to characterise faulting and elucidate its effect on hydrocarbon migration and accumulation. Active faults are generally excellent vertical conduits with strong fault activation resulting in vertical migration of most hydrocarbons and little preservation; traps near faults with fault slip rates greater than 20 m/Ma rarely contain commercial oil and gas accumulations. Faulting can form shale smear, which, if continuous, can act as a barrier to hydrocarbon migration. An active fault can allow hydrocarbon transport from deeper formations and to be trapped by continuous shale smear in shallower strata. Most of the oil and gas in the Zhu I Depression have accumulated near faults with a moderate fault slip rate (<20 m/Ma) and development of continuous shale smear (SSF<4–6). 相似文献
5.
J. H. TerHeege B. B. T. Wassing B. Orlic S. B. Giger M. B. Clennell 《Rock Mechanics and Rock Engineering》2013,46(3):465-478
Prediction of hydrocarbon column heights in structural traps critically depends on proper analysis of the sealing capacity of faults. Entrainment of clay in fault zones in upper crustal levels may lead to the development of continuous clay smears that dramatically increase the sealing capacity of faults. In this study, direct shear experiments on large-scale samples of layered sandstone–claystone–sandstone are simulated using two-dimensional discrete element numerical models to study the development of clay smears for different claystone types and normal stress conditions. Analysis of clay smear structures in terms of drag, slicing, wear and flow of clay reveals that drag is dominant at low shear displacements and high local stress concentrations, slicing and wear become important at higher shear displacement and low stresses at source bed near the fault zone. Correlation between critical fault displacements in the experiments and local stress ratios (shear stress divided by normal stress) in the models is used to determine smear failure and leakage for all claystones and normal stresses. A smear breach diagram with sealing/leaking conditions for faults containing clay smears shows that clay smears may be sealing at larger displacements than predicted by other fault seal algorithms, such as shale gouge ratio, in particular for low shale content and high normal stress. 相似文献
6.
P. Van Rensbergen A. Rabaute A. Colpaert T. St. Ghislain M. Mathijs A. Bruggeman 《International Journal of Earth Sciences》2007,96(1):185-197
This study documents the suite of processes associated with source-to-seafloor fluid migration in the Connemara field area
on the basis of 3D seismic data, well logs, 2D high-resolution seismic profiles, subbottom profiles, short cores and sidescan
sonar data. The combination of datasets yields details about fluid migration pathways in the deep subsurface, in the unlithified
shallow subsurface and about the distribution of fluid and gas seeps (pockmarks) at the sea floor. The Connemara field area
is characterized by vertical fluid migration pathways (“seismic chimneys” or “gas chimneys”) that extend from the top of the
Jurassic sequence, cross-cutting the entire Cretaceous sequence to the Upper Tertiary deposits over a vertical distance of
up to 1.5 km. Their localization is mainly structurally controlled to the crest of tilted fault blocks along the main hydrocarbon
migration pathways. These chimneys are important conduits for focused vertical fluid/gas flow from the deep to the shallow
subsurface. However, gas seeps (pockmarks) at the sea floor are almost randomly distributed, which indicates a change from
focused to diffuse fluid/gas migration in shallow, unconsolidated sediment. Where the vertical chimneys reach up to unlithified
Eocene to Miocene sands, widespread deformation, interpreted as fluidization, occurs around the main conduit. This deformation
affects about 32% of the entire unconsolidated Tertiary section (Late Eocene – Miocene). A Plio-Pleistocene glaciomarine drift
with up to five horizons with iceberg ploughmarks seals the Tertiary sands. In the near surface sediments it is observed that
gas accumulation occurs preferentially at iceberg ploughmarks. It is inferred that lateral migration at five levels of randomly
oriented ploughmarks dispersed gas over larger areas and caused random pockmark distribution at the sea floor, independent
from the underlying focused migration pathways. This study demonstrates that fluid flow migration changes from structurally
controlled focused flow in the deep consolidated subsurface to diffuse flow, controlled by sediment variability, in the shallow
subsurface. This result is relevant to a better understanding of the distribution of seepage-induced features at the seafloor
related to focused hydrocarbon migration pathways known from industry data and fluid flow modeling. 相似文献
7.
Fault zone architecture and fluid flow in interlayered basaltic volcaniclastic-crystalline sequences
Faults in continental flood basalt sequences potentially control subsurface fluid flow. We present field and microstructural observations from fault zones cutting interlayered basaltic volcaniclastic-crystalline sequences within the North Atlantic Igneous Province. Fractures likely initiate within lava units, before linking through the volcaniclastic units. Through-going faults show refraction, with subvertical faults in the lavas joined to variably inclined faults in the volcaniclastic layers. At >1.0 m displacement, volcaniclastic units are progressively dragged into the fault plane forming a smear. Volcaniclastic sandstones deform by flow. Claystones fracture, and are incorporated into smears as breccia. Experimentally measured host and fault rock sample permeabilities, at aquifer to reservoir pressures (i.e., 10–90 MPa; ∼0.3–3.0 km depth) show fault rocks from low displacement faults have relatively low permeability (10−17–10−20 m2); fault rocks from higher displacement structures have comparatively high permeability (10−15–10−17 m2). Our observations suggest that permeability is determined by the opposing influences of clay mineralization, which decreases permeability, versus the development of interconnected, higher permeability zeolite veins. Brecciation and the formation of zeolite vein networks within claystone smears results in high permeability. Zeolite veins in volcaniclastic units form poorly-connected, spaced sets, parallel to the slip plane, hence sequence permeability remains low. 相似文献
8.
莺歌海盆地DF1-1底辟断裂系统及其对天然气成藏的控制 总被引：4，自引：1，他引：4
莺歌海盆地的巨厚充填，高地温梯度及大规模的超压流体活动等特殊的地质背景，造就了DF1－1底辟构造的独特性，其内天然气的总体特征与底辟区的断裂系统存在着密切的联系。底辟区内的超压流体活动使其上覆地层产生众多的断裂和裂缝。这些垂向上的断裂和裂隙既构成了异常压力体系能量释放的主要通道。同时也形成了天然气运多的垂向输导体系。在断裂开启过程中上升的活动流体主要取决于断裂下延的深度及断裂上延所连通的中深一浅层的渗透性砂体，因此由断裂与砂体的相互配置所构成的输导体系在DF1－1气田的成藏中起着重要的作用。根据DF1－1的成藏特点，强调断裂系统与天然气运聚的相互促进关系，建立了断裂系统与天然气成藏关系模式。 相似文献
9.
YIN Xiulan Institute of Geomechanics Chinese Academy of Geological Sciences Beijing China LI Sitian China University of Geosciences Wuhan China YANG Jihai ZHANG Qiming China Offshore Oil Nahai Weast Corp. Zhangjiang China 《Continental Dynamics》2000,(1)
1. Introduction In recent years, growing attention has been focused on diapirs because of their significance to hydrocarbon accumulation in basins (Barber & Brown, 1988; Martin Hovland et al., 1989; Law et al., 1989; Collier et al., 1990; Lewis et al., 1994; Carmelo Monaco et al., 1996; Hieke et al., 1996; Hieke et al., 1996; Lewis et al., 1996; Limonov et al., 1996; Gallardo & Blackwell, 1999). With more and more effort devoted to the studies of the northern continental marginal basins … 相似文献
10.
根据轮台断裂的构造特征,提出了应用地球物理方法研究轮台断裂封堵性的技术思路和方法。在地震资料精细保幅处理的基础上,对地震资料进行速度反演,利用地震资料和测井资料计算出断层上、下盘附近地层的泥质含量、泥质涂抹量、孔隙度、地层压力等。通过研究并置接触关系、孔隙连通性、压力差异等判别断裂封堵能力,结合地震资料特殊处理并预测雅南１号构造的含油气性。 相似文献
11.
与火山岩有关的油气藏或油气显示已在世界范围内被广泛发现,然而受火山岩储层强非均质性的影响,揭示火山岩油气成藏过程的盆地模拟研究进展十分缓慢,尚未见到关于火山岩储层中油气运聚成藏模拟研究的报道.采用PetroMod软件首次成功模拟了火山岩储层天然气运聚成藏过程,系统论述了含油气盆地模拟工作中三维精细地质模型的建立、关键参数的选取,并在统计国内外火山岩物性的基础上提出了不同岩性火山岩孔隙度与深度的关系,结合研究区岩相分布,考察了不同断裂活动期和不同运移算法时深层火山岩天然气运聚过程.结果揭示:徐家围子断陷深层有机质具有接力生气的特征,无主生气期,火山岩气藏主要形成于泉头组-青山口组末期,气藏发育位置受控于断裂分布与活动期、火山岩体和储层孔隙度;活动期次与时间可影响天然气聚集层位,深层气源断裂活动期要早于94.5 Ma;采用混合法模拟火山岩储层中的油气运聚成藏比较合适.徐家围子断陷深层火山岩天然气的下一步勘探方向为斜坡带、洼陷深部的微幅度构造、火山岩体和岩性尖灭带,同时深层致密砂砾岩储层也应有较大潜力. 相似文献
12.
13.
The continuity of clay-rich fault gouge has a large effect on fluid transmissibility of faults in sand–clay sequences, but clay gouge continuity and composition in 3D are not well known. We report observations of 3D clay smear continuity in water-saturated sandbox experiments where the sheared clay layers were excavated after deformation. The experiments build on existing work on the evolution of clay gouge in similar 2D experiments where interpretations were made in profile view.We used well-known model materials (“Benchmark” sand and uncemented kaolinite–sand mixtures) that were further characterized using standardized geotechnical tests and triaxial compression experiments at effective pressures corresponding to the sandbox experiments. Results show a nonlinear failure envelope of the sand, in agreement with existing models. Unconfined compression experiments with the clay show cohesion around 50 Pa and brittle behavior.A sheared, ductile clay layer embedded in sand above a 70° dipping basement fault reveals a complex, natural-looking clay gouge architecture with relay ramps, breached relays and fault lenses. The clay gouge shows clear variations in composition and thickness and becomes locally discontinuous at throw-thickness ratios above 7, in contrast to our earlier 2D observations where discontinuous clay-gouge only formed in cemented clay layers. In addition to tectonic telescoping in the relays, the thin, continuous parts of the clay gouge were transformed from an initial pure clay by mechanical mixing of sand and clay.We also discuss the applicability of these results to the evolution of normal fault zones and deformation bands in sand–clay sequences at effective pressures below the onset of cataclasis and conclude that in fault zones a higher degree of internal segmentation reduces the probability of the formation of discontinuities. 相似文献
14.
Angelo Camerlenghi Daniela Accettella Sergio Costa Galderic Lastras Juan Acosta Miquel Canals Nigel Wardell 《International Journal of Earth Sciences》2009,98(4):735-750
We present the seafloor morphology and shallow seismic structure of the continental slope south-east of the Balearic promontory
and of the adjacent Algero-Balearic abyssal plain from multibeam and chirp sonar data. The main purpose of this research was
to identify the sediment pathways from the Balearic promontory to the Algero-Balearic deep basin from the Early Pliocene to
the Present. The morphology of the southern Balearic margin is controlled by a SW–NE structural trend, whose main expressions
are the Emile Baudot Escarpment transform fault, and a newly discovered WSW–ENE trend that affects the SW end of the escarpment
and the abyssal plain. We relate the two structural trends to right-lateral simple shear as a consequence of the Miocene westward
migration of the Gibraltar Arc. Newly discovered steep and narrow volcanic ridges were probably enabled to grow by local transtension
along the transform margin. Abyssal plain knolls and seahills relate to the subsurface deformation of early stage halokinetic
structures such as salt rollers, salt anticlines, and salt pillows. The limited thickness of the overburden and the limited
amount of deformation in the deep basin prevent the formation of more mature halokinetic structures such as diapirs, salt
walls, bulbs, and salt extrusions. The uppermost sediment cover is affected by a dense pattern of sub-vertical small throw
normal faults resulting from extensional stress induced in the overburden by subsurface salt deformation structures. Shallow
gas seismic character and the possible presence of an active polygonal fault system suggest upward fluid migration and fluid
and sediment expulsion at the seafloor through a probable mud volcano and other piercement structures. One large debris flow
deposit, named Formentera Debris Flow, has been identified on the lower slope and rise of the south Formentera margin. Based
on current observations, we hypothesize that the landslide originating the Formentera Debris Flow occurred in the Holocene,
perhaps in historical times.
相似文献
| Angelo CamerlenghiEmail: |
15.
More than 100 new heat flow measurements have been collected in recent years (2002–2004) in different tectonic environments
of the northern Black Sea. The northern periphery of the Black Sea is characterized by strong geodynamic and seismic activity,
high sedimentation rates, diapiric structures, mud volcanism, and fluid and gas escape at the sea floor. We present new thermal
data from the shelf, continental slope and deep-water basin, measured off-shore using a marine thermo-probe and on-shore in
drill holes. Heat flow density ranges from 20 to more than 2,000 mW/m2. For two local areas (the Dnieper gas seeps and the Dvurechenski mud volcano area), we discuss the relation between heat
flow variability and the geological and physical processes in the near-bottom sediment layer. The Dnieper gas seeps area is
characterized by strong small-scale heat flow variability and is controlled by fluid and gas migration. In the Dvurechenski
active mud volcano, the near-bottom temperature in sediments is anomalously elevated because additional heat is carried out
by mass flows of fluids and clay minerals. Away from the mud volcano heat flow quickly decreases to background values. 相似文献
16.
Despite its location on sediment-free basalt, vent fluids from the Main Endeavour Field (MEF) contain chemical species that indicate fluids have interacted with sediments during circulation. We report on the distribution and isotopic abundances of organic compounds (C1-C3 alkanes and alkenes, benzene and toluene) in fluids collected from the Main Endeavour Field (MEF) in July, 2000, to understand the processes that regulate their abundances and characterize fluid sources. Aqueous organic compounds are derived from the thermal alteration of sedimentary organic matter and subsequently undergo further oxidation reactions during fluid flow. Fluid:sediment mass ratios calculated using ΣNH4 concentrations indicate that the sediments are distal to the MEF, resulting in a common reservoir of fluids for all of the vents. Following the generation from sediment alteration, aqueous organic compounds undergo secondary alteration reactions via a stepwise oxidation reaction mechanism. Alkane distributions and isotopic compositions indicate that organic compounds in MEF fluids have undergone a greater extent of alteration as compared to Middle Valley fluids, either due to differences in subsurface redox conditions or the residence time of fluids at subsurface conditions. The distributions of the aromatic compounds benzene and toluene are qualitatively consistent with the subsurface conditions indicated by equilibration of aqueous alkanes and alkanes. However, benzene and toluene do not achieve chemical equilibrium in the subsurface. Methane and CO2 also do not equilibrate chemically or isotopically at reaction zone temperatures, a likely result of an insufficient reaction time after addition of CO2 from magmatic sources during upflow. The organic geochemistry supports the assumption that the sediments with which MEF fluids interact has the same composition as sediments present in Middle Valley itself, and highlight differences in subsurface reaction zone conditions and fluid flow pathways at these two sites. 相似文献
17.
断裂在纯净砂岩中的变形机制及断裂带内部结构 总被引：1，自引：0，他引：1
以纯净砂岩为对象,考虑了影响断裂变形的主要因素,包括成岩阶段、孔隙度、温度和围压,系统剖析了不同性质砂岩的断裂变形机制、微构造特征及形成断裂带的内部结构,对研究砂岩内断裂封闭性具有重要的指导意义。研究表明：纯净的砂岩在未固结-半固结成岩阶段发生断裂,变形机制为颗粒边界摩擦滑动,导致颗粒旋转和滚动,即为颗粒流,形成的微构造为解聚带,孔渗性同母岩比没有明显降低,断裂带尽管具有断层核和破碎带二分结构,但渗透率比母岩高,为流体垂向运移的通道;在固结成岩阶段（孔隙度大于15%）发生断裂,变形机制为碎裂作用,颗粒边界摩擦滑动导致颗粒旋转,即为碎裂流,形成的微构造为碎裂带,渗透率同母岩比一般降低1～3个数量级,形成侧向有一定封闭能力、垂向渗透的断裂带;固结阶段（孔隙度小于15%）发生断裂,开始由于破裂作用,形成断层角砾岩,伴随着碎裂流发生,形成碎裂岩,因此早期形成高渗透断裂带,后期断层逐渐封闭。固结成岩的砂岩在抬升过程发生断裂,变形机制为破裂作用,形成无内聚力的角砾岩,为高渗透断裂带。在不同成岩阶段发生变形,形成多类型变形构造的叠加,对于一条晚期形成的断层而言,由于不同深度变形机制及微构造类型不同,导致油气选择性充注,碎裂带和压溶胶结碎裂带阻止油气向高孔隙度砂岩中充注,解聚带会成为油气运移的通道,裂缝有利于油气优先充注。因此,高孔隙性砂岩中孔隙度较低的储集层由于碎裂带不发育常常含油气性最好,而低孔隙性砂岩由于裂缝产生含油气性较好。 相似文献
18.
胜利油田东营凹陷中央隆起带断层封闭模式研究 总被引：3，自引：2，他引：1
东营凹陷中央隆起带断裂系统复杂,断层封闭性直接控制油气藏形盛分布及油气藏规模,封闭性强的断层附近可形成大规模油气藏,封闭性差的断层附近油气藏规模小,甚至无油气藏形成.以岩性配置封闭模式、主应力封闭模式和泥岩沾污带封闭模式3种最主要的封闭模式为例建立了东营凹陷中央隆起带断层封闭模式.定量分析评价了东营凹陷中央隆起带断层封闭性,认为东营凹陷中央隆起带封闭性断层的最佳断面正应力为40~50 MPa,封闭性断层的泥岩沾污因子常小于2.6.针对某一具体断层判断其是否具有封闭性需多方面综合分析,不可简单地进行单因素分析. 相似文献
19.
I.I. Nesterov 《Russian Geology and Geophysics》2009,50(4):320-326
The paper deals with the main fundamental problem of oil and gas geology—compilation of a theoretical basis and elucidation of the mechanism of hydrocarbon pool formation. The temperature factor determining this mechanism is insufficient for the breaking of carbon–carbon bonds in organic molecules. It is shown that this process is provoked by the internal energy of the subsurface organic matter determined by unpaired electrons surrounding carbon nuclei. In natural processes, this phenomenon is realized as a result of sedimentary-rock consolidation on the subsidence of sedimentation basins, during subhorizontal microdislocations measured via Poisson's ratio and Protod'yakonov “arch”. This effect can be reached on hydrofracturing. A possibility of fluid hydrocarbon migration beyond the modern-day oil and gas pools is discussed, thus demonstrating that there are no traces that would suggest oil migration. Hydrocarbon pools have been revealed in clayey rocks, both bituminous and OM-poor. It is shown that the exploitation of a new type of reservoir (bazhenite) with natural hydrocarbon pools as well as technogenic (newly formed) oil and gas pools in clayey, clay-siliceous, siliceous, clay-carbonate, and clay-siliceous-carbonate bituminous rocks will significantly increase oil production in West Siberia. 相似文献
20.
油气“穿断运移”模式、评价方法与应用——以珠江口盆地恩平凹陷为例 总被引：1，自引：0，他引：1
断层对油气藏的控制作用体现在油气藏的形成和演化过程中断层输导油气和封堵油气的双重作用。究竟起哪种作用主要取决于断层不同部位、不同层段封堵能力和输导能力的差异性。本文基于珠江口盆地恩平凹陷大量断层圈闭油藏的实际钻井资料,从断层活动速率、生长指数、泥岩涂抹因子(SSF)、断层泥比率(SGR)等角度建立了油气"穿断运移"模式和定量评价方法。指出对于恩平凹陷新近系圈闭而言,当控圈断层粤海组沉积期的活动速率<10m/Ma或生长指数<1.1、SSF>1.8~2.1或SGR<0.35~0.42时,油气能够横穿断层运移。基于这项研究,预测了恩平凹陷北部隆起带A1、A3、A4和南部隆起带A20等构造控圈断层的侧向开启部位和层段,推动了多个构造的钻探和3个商业油田的发现,证实了油气"穿断运移"模式和评价方法的准确性和适用性,对具有类似地质特征的地区具有良好的理论指导和实践价值。 相似文献