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1.
付广 《科学技术与工程》2011,11(12):2792-2797
为了研究断裂密集带在三肇凹陷葡萄花油层油成藏与分布中的作用,利用地震解释结果对断裂密集带发育及构成进行了研究。得到三肇凹陷葡萄花油层发育大量T11断裂。它们主要由断陷期形成坳陷期活动、断陷期形成坳陷期和反转期活动、坳陷期形成和坳陷期形成反转期活动的4类断裂构成。平面上呈29个密集带分布,主要分布在三肇凹陷北部和中部,为北北西、近南北和北北东向展布。由断裂密集带与葡萄花油层油藏之间关系研究得到,断裂密集带与油运聚成藏关系密切。对成藏与分布具有3个方面的控制作用:①断裂密集带边界断裂对油运移的输导,使油大面积分布在断裂密集带及其附近;②断裂密集带交叉处油更富集;③断裂密集带内的交叉构造有利油聚集成藏。  相似文献   

2.
对比分析了库车坳陷与川西坳陷的构造演化、变形区、变形层、滑脱层系,认为两者在构造变形方面存在明显差异。库车坳陷的应力特征以压性为主,横向上变形特征差异较小,纵向上由北向南变形强度逐渐减弱;川西坳陷的应力特征,在晚三叠世须四段一晚侏罗世蓬莱镇组时,表现为很强的扭动特征,构造变形在平面上变化较大,不同区块主变形期及变形特点差异明显,造成深坳陷及斜坡带断裂构造不发育,油气垂向输导作用较差。  相似文献   

3.
库车坳陷膏盐岩对异常高压保存的控制作用   总被引:10,自引:0,他引:10  
近年来 ,库车坳陷所发现的大中型天然气田 (藏 )几乎都具有异常高压的特征 ,且在纵向剖面上异常高压位于古近系库姆格列木组和新近系吉迪克组膏盐岩之下 .这说明了库车坳陷天然气的富集成藏与异常高压密不可分 ,而异常压力又与膏盐岩有十分重要的关系 .因此 ,研究膏盐岩与异常高压之间的关系对于认识高压气藏的成藏有重要意义 .通过对库车坳陷地质概况、膏盐的分布特征及地层压力特征的研究 ,探讨了膏盐岩对异常高压的控制作用 .结果表明 :在平面上 ,库车坳陷膏盐的分布从盆地边缘向盆地中心逐渐加厚 ,具有西部厚、东部薄的特点 .而异常高压的分布呈南北分带的反“S”型 ,高压区分布在中带 ,表现为受膏盐岩分布的控制 .膏盐岩不但具有强烈的塑性 ,而且本身具有很高的突破压力和超压 ,对异常高压起到了压力和物性的双重封闭 ,有效地阻止了异常高压的泄露 ,进而使得高压气藏得以完好保存  相似文献   

4.
库车坳陷是塔里木盆地重要气源地之一,富含油气资源。但是,对于该区油气成藏认识还存在较大争议。通过统计库车坳陷东部600余个天然气样品地球化学特征,对该地区天然气组成、碳同位素、轻烃及成因类型进行了详细剖析。研究发现,库车坳陷东部天然气烃类气体以甲烷为主,重烃含量较低;非烃类气体主要以N2为主,含有少量的CO2。天然气碳同位素特征显示,库车坳陷东部天然气主要处于高成熟—过成熟阶段,且为有机成因烷烃气;并具有一定的同源性。天然气主要为正碳同位素系列,部分碳同位素表现出局部倒转现象。通过对库车坳陷东部天然气地球化学特征综合分析可知,该地区天然气为偏煤成气;且存在少量煤成气与油型气混合气,或者为"同型不同源"气或"同源不同期"的混合气。  相似文献   

5.
通过综合对比分析,发现辽东湾断陷和下辽河坳陷油气成藏条件和油气分布规律存在差异:①两个地区都发育沙三段主力烃源岩,但下辽河西部凹陷和大民屯凹陷还发育沙四段主力烃源岩;②辽东湾断陷储集层成因类型较单一,下辽河坳陷多样化;③与下辽河坳陷相比,辽东湾砂体不发育,断层少,输导条件欠佳;④辽东湾已发现的圈闭类型较单一,以构造圈闭为主,单纯的岩性圈闭发现较少,而下辽河坳陷内发育各种类型的构造、地层和岩性圈闭;⑤辽东湾断陷和下辽河坳陷都具备良好的区域盖层条件和保存条件;⑥辽东湾断陷原油探明储量主要分布在东营组,而下辽河坳陷原油探明储量主要分布在沙河街组;⑦辽东湾断陷现今找到的大中型油气田多位于辽西低凸起主断棱带上,而下辽河坳陷在斜坡带、陡坡带及深陷区均有大型油气田发现,具有“整凹含油”的特点.以上对比分析对于进一步预测辽东湾地区油气勘探开发潜力具有重要意义.  相似文献   

6.
库车坳陷构造挤压增压定量评价新方法   总被引:3,自引:1,他引:2  
依据构造压实作用机制,对真实地层条件下构造挤压增压的定量评价方法进行探讨,通过库车坳陷主要构造带封闭系数的评价和喜马拉雅晚期最大主应力的分布模拟,对库车坳陷构造挤压引起的流体增压及其贡献进行评价.结果表明:库车坳陷喜马拉雅晚期构造挤压增压幅度及其贡献在克拉苏地区最大,增压幅度为10~13 MPa,增压贡献为25%~30...  相似文献   

7.
超压可在断裂的沟通作用下发生垂向传递,目前对于断裂传递型超压的识别、计算和预测研究还比较薄弱。分析此类超压的成因,修正前人关于垂向传递型超压识别方法,以库车坳陷克拉苏冲断带盐下断裂发育的超压地层为例,通过含气声速校正和浮力校正,识别盐下断裂传递型超压,近似计算传递量,最终分析影响该区断裂传递超压量的主控因素。结果表明:克拉苏冲断带的大北和克拉苏地区的盐下地层均不同程度存在超压传递现象;超压的传递量在大北地区大北3井为24.10 MPa,在吐北2井为26.35 MPa,克拉苏地区的克拉2井平均为16.47 MPa,由断裂传递所产生的超压约占实测总过剩压力的50%;超压的传递量主要受断裂的断距、倾角及断裂穿越地层的过剩压力梯度的综合影响,是三者乘积的综合效应。  相似文献   

8.
四川盆地川西坳陷与川中隆起过渡带是一个斜坡地带。通过对绵阳丰谷—中江回龙地区以上三叠统须家河组为目标层的勘探目标优选评价研究,证实了在该过渡带及其两侧具备有利的沉积和构造背景;存在有效的储集层和储集体;烃源岩生烃强度高,天然气资源潜力大;储盖组合配置良好;有多种类型的有效而适时的圈闭;天然气输导条件和保存条件有利。探讨了地层压力流体封存箱成藏可能是该过渡带的主要成藏模式,认为川西坳陷与川中隆起过渡带的须家河组具有良好的天然气勘探前景。  相似文献   

9.
红柳构造坡折带层序地层学模式与油气分布   总被引:4,自引:0,他引:4  
在对地震、测井和钻井等资料详细分析的基础上,将济阳坳陷红柳地区下第三系划分出了7个三级层序、19个体系域.在层序地层单元划分和对比的基础上,结合断层上下盘地层厚度的差异变化所反映的古地形,认为济阳坳陷红柳地区在下第三系沉积时期,发育两种不同类型的构造坡折带,并建立了该区的构造坡折带层序地层学模式,研究了构造坡折带层序地层学模式与油气的关系,认为第Ⅰ,Ⅱ层序间的界面附近可形成有利的地层不整合覆盖圈闭与构造-岩性圈闭;第Ⅳ层序低位域可作为油气的运载层,在合适构造的匹配下,可形成有利的构造圈闭或构造-岩性圈闭,并对有利区带做出了预测.  相似文献   

10.
冷湖-南八仙构造带是柴达木盆地油气勘探的重点地区之一.综合地质、地震和分析化验等资料,应用现代油气成藏、地球物理学、地球化学等理论和方法,对该地区油气成藏的地质条件及成藏模式进行了分析.结果表明,该区带油源丰富,储集条件好,发育多套有效的储盖组合,多种类型圈闭(尤其是构造圈闭)发育且成排成带分布,各成藏要素配置良好,具有形成大中型油气田的有利条件.在此基础上,提出了该区带油气有近源断层输导纵向成藏、远源不整合输导侧向成藏、近源不整合输导纵向成藏和近源混合输导成藏4种模式.其中,近源断层输导纵向成藏模式和近源混合输导成藏模式是本区主要的油气成藏模式,而近源不整合输导纵向成藏模式的油藏可作为本地区下一步勘探的方向.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.  相似文献   

14.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

15.
The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3~4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰~ -7.8‰, PDB) and matrix dolomites (-6.6‰~ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084~0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078~0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.  相似文献   

16.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

17.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

18.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

19.
In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.  相似文献   

20.
The non-orthogonal localized molecular orbital(NOLMO)is the most localized representation of electronic degrees of freedom.As such,NOLMOs are thus potentially the most efficient for linear scaling calculations of electronic structures for large systems.However,direct ab initio calculations with NOLMO have not been fully implemented and widely used,partly because of the slow convergence issue in the optimization of NOLMO.We devel-  相似文献   

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