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1.
以松辽盆地北部徐家围子断陷兴城地区深层火山岩为研究对象,考虑埋藏成岩、后期蚀变、风化淋滤作用等影响因素,分析10件样品的岩石学和地球化学特征,判别火山岩堆积、保存时的古地理环境.结果表明:研究区火山岩岩石类型丰富,从基性玄武岩到中性安山岩和粗面岩,再到酸性流纹岩、霏细岩,以及熔结火山碎屑岩和正常火山碎屑岩均有发育.稀土...  相似文献   

2.
研究徐家围子断陷19个气藏.结果表明:徐家围子断陷天然气盖层主要为登二段发育的泥岩盖层和营—段顶部发育的沉凝灰岩和泥岩盖层,前者整个断陷分布,是断陷南部营四段火山角砾岩气藏和断陷北部营三段火山岩气藏的盖层;后者仅分布在断陷南部,是营一段火山岩气藏盖层.盖层厚度大于2.5m,主要分布在25.0m以上.盖层排替压力p主要大...  相似文献   

3.
针对火山岩储层非均质性强烈、横向变化大、有效预测和开发难度大等问题,以松辽盆地徐东地区营城组一段火山岩储层为例,综合岩芯、测井、地震和分析测试等多种资料,在火山岩体发育基本特征表征基础上,从储层精细划分、岩相分类与储层物性分析、有利开发区带预测等方面,阐述了火山岩体追踪识别在气藏有效开发中的应用情况。结果表明:松辽盆地徐东地区单个火山岩体平面上面积多在20km2,平均厚度多在300m;在火山岩储层精细对比中,加入火山岩体的追踪识别可以解决精细分层界限穿越火山岩体的"穿时"矛盾;火山岩体与火山岩相关系密切;靠近火山口的构造高部位多为好储层发育和有利的开发区域。  相似文献   

4.
火山岩储层非均质强、孔隙度—渗透率关系难以用单一回归数学模型表述,采用岩石物理相中层流指数作为表征参数,对徐深气田酸性火山岩储层岩心样品的孔渗关系分类,建立基于层流指数的孔隙度—渗透率关系模型;应用层流指数分类结果,对通过测井孔隙度频谱分析得到的储层缝洞指示参数进行刻度、分类,建立与层流指数分类对应的分类标准;对于非取...  相似文献   

5.
孤店断陷为松辽盆地南部深层天然气勘探的有利区带,同时也记录了中国东部中-新生代板块运动和盆地演化的丰富信息。利用钻测井资料及高分辨率三维地震资料,并结合区域构造背景,对孤店断陷的地质结构及构造演化特征进行分析。结果表明孤店断陷在纵向上可以划分为基底构造层、下构造层、中构造层及上构造层。由于受到晚中生代以来太平洋板块向东亚板块的俯冲作用及区域构造应力场的影响,孤店断陷的构造演化过程可以划分为断陷期、断坳转换期、稳定坳陷期及构造反转期。孤店断陷的边界大断层(孤店断层)在断陷初始发育期(火石岭组-沙河子沉积期)表现为6段走向各不相同的小型孤立断层,在断陷晚期(营城组沉积期)经过生长、连接而形成统一的断陷边界,并在断坳转换期(登娄库组-泉头组沉积期)和坳陷期(青山口组-嫩江组沉积期)发生广泛而强烈的张扭活动,以及在构造反转期(嫩江组沉积末期)发生强烈反转和分段差异逆冲活动。研究结果可以为松辽盆地以及中国东部地区的构造活动及演化研究提供参考,并进一步指导油气勘探。  相似文献   

6.
石炭系火成岩储层是准噶尔盆地油气勘探开发的重要方向之一.以准噶尔盆地西北缘红车断裂带石炭系火成岩储层为主要研究对象,基于薄片鉴定、取心分析及测录井等资料,分析研究区的7种优势岩性及测井响应特征,采用多参数分布交会法,建立自然伽马—密度、中子孔隙度—密度和自然伽马—构建参数交会图版,预测优势岩性的平面分布.结果表明:研究区优势岩性为玄武岩、安山岩、火山角砾岩、凝灰岩、凝灰质砂砾岩、凝灰质细砂岩和沉凝灰岩;优势火成岩岩性具有局部发育的分布特征,以凝灰质为主的岩性(凝灰岩、凝灰质砂砾岩和凝灰质细砂岩)主要分布于研究区北部和主断层东侧,火山熔岩(玄武岩、安山岩)和火山角砾岩主要分布于研究区主断层西侧.多参数分步交会法可有效应用于研究区优势火成岩岩性识别,为利用常规测井资料有效识别火成岩岩性提供一种方法.  相似文献   

7.
为了预测南堡凹陷油气分布规律、优质储层及含油气有利区,利用岩心、薄片、扫描电镜及测井等资料,分析南堡凹陷古近系东营组一段储层沉积微相、成岩相及孔隙结构相。结果表明:研究区东营组一段储层主要以辫状河三角洲前缘沉积相为主,发育水下分流河道、水下分流间湾及河口坝等沉积微相。根据成岩矿物、成岩作用类型及强度等,将储层划分为压实致密相、碳酸盐胶结相、黏土矿物充填相和溶蚀相。根据储层物性资料、T_2几何平均值及束缚水饱和度等参数,将研究区孔隙结构相划分为Ⅰ类大孔粗喉型、Ⅱ类中孔中喉型、Ⅲ类细孔细喉型及Ⅳ类细孔微喉型四类。研究区岩石物理相划分为PF1—PF4四类,其中PF1相对应于常规油气储层及油水层,PF2、PF3相对应于产能较低的油层及油水层,PF4相对应于干层及非储层。该结果可为南堡凹陷东一段低阻油层测井识别提供依据。  相似文献   

8.
昆北油田切12井区 E13 主要是一套近源且位于不整合面上的辫状河三角洲相沉积,岩性主要为含砾砂岩和砂砾岩,由于受沉积环境、成岩作用、构造等因素的影响,岩性复杂、成熟度低、分选差、孔隙结构具有多重性、有效储层与非有效储层混杂、储层非均质性极强,因此,采用了更精细的岩石物理相对储层非均质性进行了研究。以岩性资料、测井资料及其解释成果为基础,选取了反映沉积、成岩、构造作用的自然伽马、自然电位、声波时差、密度和裂缝孔隙度5个参数,运用加权平均法计算了反映岩石物理相的综合评价系数。在此基础上,采用逐点岩石物理相综合评价系数,运用变异系数法对储层非均质性进行了计算,按 照 变 异系数值大小将工区储层非均质性分为3类:第Ⅰ类弱非均质性,变异系数≤0.2;第Ⅱ类中等非均质性,变异系数在0.2~0.4之间;第Ⅲ类强非均质性,变异系数>0.4。根据这个标准对储层平面非均质性进行了评价。   相似文献   

9.
塔里木盆地轮南2油田JIV油组电阻率普遍偏低,个别油层电阻率比水层电阻率还低,含油性评价主要根据试油和试采结论;未试油层段储层含油和油藏油水界面不明确。为精细解释储层流体性质、判断油水界面及解决采收率低等问题,利用轮南2油田JIV油组12口取心井的岩石热解和荧光薄片图像分析进行流体性质划分,明确在不同流体性质下岩石热解数据和荧光显微图像的变化特征。利用岩心含油性观察、岩心物性分析和生产动态资料,制定划分储层流体性质的方法,建立一套适合轮南2油田JIV油组的流体性质半定量划分标准。生产动态资料分析证明流体性质划分标准的准确性和方法的实用性。  相似文献   

10.
为了明确致密砂岩气藏储层微观孔喉对气水相渗特征的控制机理,更好地指导气田增储上产,以东胜气田J72井区下石盒子组储层为研究对象,综合多种分析化验资料并细分岩石相探究了微观孔喉参数对气水渗流能力的影响,揭示了不同岩石相对含气性及产能的控制作用。研究结果表明:J72井区下石盒子组岩石相可以归纳为砾岩相、砾质砂岩相、含砾粗砂岩相、中细砂岩相、泥岩相五大类,其中含砾粗砂岩相、砾质砂岩相为优质岩石相;孔隙类型主要为次生粒间溶孔,平均占比达48.5%,含砾粗砂岩相、砾质砂岩相、中细砂岩相的粒间溶孔比例依次减少,三类岩石相均具有多重分形的特征,大孔比例逐渐降低,其中优质岩石相的物性好、综合分形维数小;优质岩石相的黏土矿物含量低、平均孔喉半径大,气体渗流时的可动气体孔隙度和最大有效气相渗透率较大,含气性好。综合研究认为优质岩石相是控制气井高产稳产的关键因素,深入剖析岩石相的微观特征可以为致密砂岩气藏的高效开发提供有力指导。  相似文献   

11.
The basin filling geometric pattern of volcanic eruptive rocks depends on both of the eruptive locations in a basin and structural styles of fault terraces. It is divided into three types by eruptive locations and occurrences of eruptive rocks, including the pattern of eruption along fault and occurrence (PEAFO), the pattern of eruption on footwall of a fault and occurrence (PEOFO) and the pattern of eruption on hangingwall of fault and occurrence (PEOHO) in Xujiaweizi fault depression of Songliao basin, Northeast of China. Those basin filling patterns of volcanic eruptive rocks are of specific geometric characteristics controlling or affecting sedimentation, geometry of sedimentary body and sequence architecture during a sequence evolution. The study shows that the volcanic rocks developed at different stages of lowstand, transgressive and highstand can give different controls or affects on the sequence architecture.  相似文献   

12.
13.
Volcanic edifices play an important role in controlling the spatial distribution of volcanic reservoirs . Taking the volcanic rocks of the Yingcheng Formation as an example , the types of volcanic formations , seismic attributes and reservoir characteristics are studied in detail using drill cores and logging and seismic data .A volcanic edifice model is established .On the basis of lithology and internal flow unit , the volcanic edifices can be divided into 4 types , including acidic lava volcanic edifices ( single flow units and composite flow units ) , rhyolitic lava debris volcanic edifices , and basaltic lava volcanic edifices .Among these types , the acidic lava volcanic edifices ( single flow unit ) consist of a single lava flow unit , and the seismic profile is characterized by a hill-like blank reflection .Additionally, this type of edifice shows a contiguous petal-like pattern in the wave-form classification chart .The acidic lava volcanic edifices ( composite unit ) consist of several acidic lava domes and plate-like lava flows , and the seismic section is a combination of parallel and hill-like reflections .This type shows noise and short-line clutter in the waveform classification diagram .The rhyolitic lava debris volcanic edi-fices have multiple layers of stacked volcanic debris .The seismic section features a draping continuous parallel reflection over a large area , and this type of edifice is characterized by a ripple pattern in the waveform classifi-cation diagram .The basaltic lava volcanic structural seismic section shows a large area of parallel reflectors . The waveform classification phase diagram shows a single and continuous distribution .The volcanic edifices with better physical properties have the following characteristics : the primary porosity belt is well developed , the units in the volcanic edifices are superimposed , and the volcanic structure is not integrated .Acidic compos-ite flow unit volcanic reservoirs have the best physical properties , and the acidic single flow unit volcanic reser-voirs are the worst .This study provided some reference for volcanic exploration and reservoir study in areas with few or no wells .  相似文献   

14.
针对火山岩岩性复杂,非均质性强,特别是深层地震资料信噪比相对较低,有效储层识别及预测难度大的问题,以营城
组三段为目的层位,在分析火山机构地球物理特征和火山岩平面分布特征的基础上,运用地质统计学反演方法,通过GR反演预
测酸性岩、中性岩和基性岩的分布。工区中性岩最为发育,厚度为400~800m;基性岩和酸性岩相对不发育。在岩性识别的基础
上,运用密度反演分别圈定不同岩性的有效储层,本区有效储层主要以中性岩和基性岩为主,在火山锥、断裂和裂缝相对发育的地
区,有效储层相对发育。   相似文献   

15.
1IntroductionIt has recently been recognized that most of the Ceno-Mesozoic sedimentary basins in eastern China contain volcanogenic and volcaniclastic successions developed especially in the early stages of the basin formation (Wang etal.,1997;Cheng etal.,1997;Chen etal., 1999). These volcanic rocks can con-tribute to the oil/gas reservoirs under favorable con-dition (Wang etal.,1997;Hu etal.,1999). The characteristics of volcanism in the basins of eastern China can be compared to those …  相似文献   

16.
The reservoir volcanic rocks in Songliao Basin include the Lower Cretaceous (Klyc Form., 114~135 Ma,acidic rocks) and the Upper Jurassic (J3hs Form., 145~158 Ma, intermediate rocks). Vesicles coupled with faults make the volcanic reservoir spaces which do not as badly getting worse with buried depth as those of sediments generally doing. The flood rhyolites of the Lower Cretaceous cover ca. 100 000 km2 with relict thickness from 100 m to more than 1000 m. They are high-silica, rich in aluminum and potassium, high REE contents with large negative Eu anomalies,thus believed also be formed by the large-scale sialic crust partial-melting. The andesitic rocks of the Upper Jurassic are rich in Al and K, but with lower REE contents and minor negative Eu anomalies, as well as dispersal patterns of HREE.They are believed to be produced by progressively shallower partial-melting where the fractionation of garnet and/or zircon may be involved. The most probable heat sources provided for the long-lasting volcanisms in the Songliao Basin is the subduction of the Okhotsk plate.  相似文献   

17.
根据岩心观察、测井、录井、三维地震资料及地震沉积学分析,研究梨树断陷苏家屯地区火石岭组—营城组层序地层、地震相特征及其沉积解释。结果表明:研究区火石岭组—营城组可划分为SQ1—SQ5五个三级层序;沉积相类型主要有扇三角洲、正常三角洲、湖泊和火山岩沉积;火石岭组—营城组地震相外部可划分为前积地震相、杂乱地震相、席状平行—亚平行地震相、发散地震相及条带状地震相五大类,可细分为十一小类;根据剖面地震相—沉积相分析,并结合平面地震相、均方根振幅属性,研究区SQ1时期主要发育火山岩沉积,SQ2、SQ3时期扇三角洲广泛分布,主要发育在东部断阶带和西部断阶带的缓坡区,以及桑树台断裂和曲家断裂的陡坡区,湖泊相主要分布在中央深断带内。随着盆地扩张,SQ4、SQ5时期主要发育正常三角洲,湖泊相范围扩大。该结果可为研究区火石岭组—营城组油气勘探提供地质依据。  相似文献   

18.
1IntroductionVolcanic reservoirs are widespread in basins from China to the world,such as Songliao Basin,Subei Basin,Bohaiwan Basin, etc in China(Chen,1988;Chen and Li,1996;Dai and Jiang,1997;Dong,1988). As deeper study of volcanic reser-voirs,its calculated porosity is a difficult point for the appraisal of volcanic reservoirs (Dong,1991;Fujita-Yoshihiko,1985;Guo and Liu,1997;He,1999;Li,1999;Liu,1998;Luo and Shi,1996;Tang,1988;Uchida,1992;Wang,1997;Wang,1991;Yan and Yu,1996). Its …  相似文献   

19.
In Wangjiatun area of the Northern Songliao Basin, reservoir space can be divided into three types: primary pore, secondary pore and fissure according to their origins,which can be subdivided into eight subtypes: macro-vesicule,shrank primary vesicule, alteration pore, groundmass corrosive pore, normal structural crack, corrosive structural crack,filled structural crack and groundmass shrank crack according to texture and origin of the pore space. It has characteristic of double pore medium. Volcanic porosities of small diameter samples (with diameter of ca. 2.5 cm) and large diameter samples (with diameter of ca. 21.5 cm) were tested in accordance with the characteristic of volcanic reservoir space. Volcanic porosities for small diameter samples correspond with matrix porosities and those of large diameter samples correspond with total porosities including matrix and fractured porosities. Models of the calculated porosity by acoustic wave or density of volcanic reservoir are established in view of those measured data. Comparison of calculated and measuredporosities shows that precision of calculated porosities is lower for rhyolite and tuffites, and higher for basaltand andesite.Relative errors of calculated porosities by model of large diameter samples are lower than those of small diameter samples, i. e. precision of the former is higher than that of the later.  相似文献   

20.
Five paragenetic associations are recognized in Fuyu reservoir of Qijia - gulong depression of Daqing oil field: 1) detrital illite permeation, glauconite and pyrite precipitation; 2) feldspar dissolution, kaolinite precipitation and the incipient quartz overgrowths; 3) early calcite cements; 4) postdate quartz overgrowths and pore - filling quartz, authigenetic illite and chlorite formation, feldspar overgrowths, petroleum injections, K - feldspar and calcite cement dissolution; 5) pore - filling calcite and calcite replacement.  相似文献   

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