濮城油田沙-段储层特征研究

利用铸体薄片、扫描电镜、压汞曲线及普通薄片等资料对储层特征进行了研究,发现砂岩类型主要为长石石英砂岩、长石岩屑石英砂岩及长石砂岩,成分成熟度、结构成熟度中等偏高;填隙物主要为泥质、碳酸盐;粘土矿物主要为伊利石及高岭石,偶见蒙脱石.孔隙类型主要为原生粒间孔、粒间溶孔、粒内溶孔、铸模孔、晶间孔等,偶见微裂缝.喉道主要有孔隙...     

姬塬油田罗1井区长81储层特征及影响因素分析

利用钻井取心、录井、测井资料、铸体薄片、扫描电镜、毛细管压汞等多种分析测试资料进行综合分析,对姬塬油田罗1井区长81储层特征及其影响因素进行了分析,为油田下一步开发提供理论依据。     

江汉盆地拖市油田低渗透油藏储层特征——岩心分析与储层评价

通过岩石学研究，结合古物化环境分析．提供了本区储层岩石学特征和成岩作用证据，根据特殊岩心分析结果，讨论了储层物性分类特征。并通过孔隙演化过程和储层物性影响因素分析，对孔隙分布及有利储层区进行了预测性评价。     

英旺油田长8砂岩储层物性特征研究

通过铸体薄片、X线衍射、扫描电镜、常规压汞和室内敏感性实验等分析测试手段,对英旺油田长8砂岩储层的物性、微观孔隙结构及储层敏感性等特征进行详细研究。结果表明:该区长8砂岩储层属于低孔、超低渗储层,孔隙以粒间溶孔、剩余粒间孔和粒内溶孔为主,属小孔、微喉道类型,孔喉分选性一般,连通性差;长8储层敏感性以弱伤害程度为主,具有弱—无速敏、弱酸敏、弱碱敏、中等偏弱的盐敏和水敏等特点。该研究为英旺油田下一步的油气开采提供了理论依据。     

腰英台油田储层特征及影响因素分析

利用岩石薄片鉴定、岩心分析及测录井资料,研究了腰英台油田储层岩石学特征和物性特征,对影响储层物性的因素进行了分析。结果表明:腰英台油田青山口组储层岩石类型主要为长石砂岩,岩性以细砂岩和粉砂岩为主,分选中等、磨圆中等-较差,砂岩成分成熟度较低、结构成熟度中等-较低。储层的孔隙结构较复杂,非均质程度较高,孔隙的最大连通孔喉普遍偏小,主要孔隙类型有粒间孔隙、溶蚀孔隙、微孔隙,储层为低孔特低渗及特低孔超低渗储层。影响储层物性的因素主要有沉积微相、碎屑成分和结构以及成岩作用等。     

高尚堡油田北区沙三~(2+3)亚段储层特征研究

高尚堡油田北区沙三2+3亚段含油层段长,储层特征变化大,通过对铸体薄片、岩心砂岩薄片和压汞等资料分析,开展了储层岩性、物性、储集空间类型和孔隙结构等方面的研究工作。结果表明,高尚堡油田北区沙三2+3亚段储集层岩性以岩屑长石砂岩为主,成分成熟度、结构成熟度均较低,主要发育粒间溶孔、粒内溶孔,孔隙结构以Ⅱ类为主,为典型的中低孔中低渗型储层。平面上储层物性受沉积相带控制;垂向上成岩作用中的压实和胶结作用导致储层物性变差,而溶解作用产生的次生孔隙改善了储层物性。     

吐哈盆地丘陵油田三间房组低渗砂岩储层特征及控制因素分析

在对吐哈盆地丘陵油田三间房组的岩心观察及大量分析化验资料基础上,分析了研究区的储集层特征,储层物性以低渗为主,并在此背景上发育部分优质储层,储层成因主要受沉积作用和成岩作用的共同影响,不同沉积微相储层的物性差异较大,柔性组分含量大、粒度细和成分成熟度较低是造成储层特低渗透特征主要原因;同时成岩压实、胶结作用使得储层的孔隙度减小、渗透性变差,而溶蚀作用和少量成岩微裂缝的产生又在很大程度上改善了储层的特低渗透性能;水下分流河道与河口坝砂体是研究区的优质储层分布相带。     

柴北缘南八仙油田储层特征与综合评价

柴北缘南八仙油田有近50年的开发历史,储层的综合评价对于剩余油的挖潜具有重要的意义。南八仙油田第三系储层岩石类型以长石砂岩和岩屑长石砂岩为主,碎屑成分中杂基、胶结物含量较高;孔隙类型主要为原生孔隙和次生溶孔,分选较好;储层成岩作用相对较弱,碳酸盐析出是减少原生孔隙的重要因素;孔隙类型以粒间孔为主,喉道以弯片状—片状组合类型为主。储层物性为中孔—中渗类型,连通性较好;成岩相主要为早成岩B期,有利于次生溶孔的发育。应用聚类分析方法对储层综合评价表明,南八仙油田内Ⅲ类储层所占比例最大,其次为Ⅱ类储层,Ⅰ类储层比例相对较小。     

安塞油田低渗透储层岩石物性特征实验研究

方法通过实验对安塞油田低渗透储层岩石物性特征进行研究。目的了解低渗透储层在物性和孔隙结构等方面的特点，进而分析低渗透储层对物性测量、渗流能力的影响。结果低渗透岩心物性对上覆压力有一定的敏感性，而且孔隙度与渗透率间不存在线性关系，因此在物性测量、储层评价及开发过程中要考虑这一因素带来的影响。结论安塞油田低渗透岩心存在多种孔喉体系，孔隙间片状喉道较发育；而岩心中的微裂缝在储存能力上不起主导作用，但在一定条件下可改善低渗透储层的渗流能力；采用早期压裂注水可以改善开发效果     

吴起油田长6油层组沉积及储层特征

为了搞清吴起油田曾岔区长6油层组沉积特征及储层物性的影响因素,结合前人研究成果,综合分析油气显示、岩心、毛管压力及测井等资料,对研究区沉积特征和储层特征进行了研究.研究区为三角洲前缘亚相沉积,主要储集体为水下分流河道砂体,砂体主要呈北东—南西方向展布.储层孔喉半径较小,孔隙连通性差,属于特低孔—特低渗储层.影响研究区储层物性的主要因素为沉积作用和成岩作用:沉积相对储层物性具有控制作用,水下分流河道砂体的储层物性最好,其次为河口坝、席状砂;成岩作用中压实作用和胶结作用使储层物性变差,而交代作用、溶蚀作用使储层物性得到了一定的改善.河道微相为下一步油气勘探开发目标区.     

准噶尔盆地彩南油田彩003井区侏罗系辫状河三角洲相储层特征研究

为对我国西部盆地中广泛发育的辫状河三角洲储层特征进行研究,以准噶尔盆地彩南油田侏罗系辫状河三角洲相储层为研究对象,对储层矿物特征、孔隙结构特征以及储层物性进行了详细分析。通过岩石碎屑组分、粘土矿物、颗粒磨圆度、分选等方面研究对研究区储层矿物特征进行分析,发现研究区储层岩性主要为长石岩屑砂岩和岩屑砂岩为主,碎屑组分中不稳定组分（长石＋岩屑）含量高,成分成熟度低;利用孔隙半径平均值、平均孔喉比、孔隙配位数、孔隙均质系数、平均喉道宽度、排替压力等6个参数指标对孔隙特征进行分析,结果显示辫状河三角洲相储层孔喉特征中等;储层物性分析结果显示辫状河三角洲相储层的孔渗变化较大,整体上为中等孔渗储层,可以作为一种较好的油气储集层。     

吐哈盆地雁木西油田油藏描述

利用工作站油藏描述软件系统,采用地震叠加速度场变速时深转换、克里金地质统计、井约还皮阻抗反演、测井资料最优化解释及地震属性多元线性回归储集层物性等关键技术手段,分别从构造形成、储集层形态、储集层参数、油气水分布与油藏类型等方面描述了雁木西油田第三系和白垩系各油藏特征,并计算了储量。     

Seismic stratigraphy of the Upper Pliocene and Quaternary deposits in the South Caspian Basin

More than 10,000 km of seismic data were used for seismic stratigraphic analysis and differentiation of major depositional environments of Upper Pliocene and Quaternary strata in the central deepwater and eastern parts of the South Caspian Basin (SCB). The study shows that the conventional sequence stratigraphy concept works well in the South Caspian Basin. Clinoform complexes within Paleo-Amudarya shelf margin are bounded by regionally, seismically expressed sequence boundaries and flooding surfaces that can be traced to the deep basin. Sequence analysis and seismic facies interpretation showed that deposition of prograding clinoforms and deep-water turbidite systems were controlled by the relative lake-level change. Depositional interpretation of sediment infill indicates that in the South Caspian Basin, as in other closed basins with high terrigineous input, basinal deposition is from turbidity currents and slumps generated from large shelf-edge deltas. There are two distinct stratigraphic complexes interpreted from seismic data: lower, interpreted as homogeneous infill of mud-rich turbidites and deepwater lacustrine deposits (Upper Pliocene, i.e. Akchagyl and Aspheron), and upper, consisting of prograding clinoform packages and coeval deepwater fan systems and slumps (Quaternary). The source of the central basin turbidite infill was primarily the eastern “Paleo-Amudarya” shelf. Growing diapir folds structurally controlled deposition of large-scale fan systems in the central basin. The distribution of these fan systems is tied to location of the coeval thick shelf-margin complexes.     

A new look at the components of the petroleum system of the South Caspian Basin

Detailed knowledge of the petroleum systems of mature petroleum provinces is often lacking. This has often resulted from the early discovery of most of these provinces' reserves. The South Caspian basin represents one such province. The “modern” era of petroleum exploration in the South Caspian began more than 100 years ago. Even with this long history several aspects of the petroleum system have remained largely speculation. Among the key questions are:

• What is the primary hydrocarbon source for the region?

• Where and when has hydrocarbon generation taken place?

• Can exploration be extended beyond known stratigraphic and areal limits?

Recent integrated geologic and geochemical studies have attempted to answer these and other questions for the petroleum system of the South Caspian basin. These studies attempted to overcome prior problems associated with limited sample availability, severity of surface weathering, data quality and completeness. This study confirmed the Maykop Suite as the primary oil source, but restricted its stratigraphic distribution. Organic carbon content within the Maykop ranged upward to 14.28 wt.%, with hydrocarbon generation potentials (S₂) approaching 75 mg HC/g rock. Source rock deposition was cyclic and included both oil- and gas-prone episodes. Geochemically, the region's oils are highly variable as a result of their complex and variable migration and alteration histories rather than their derivation from multiple source rock units. The oils display similar molecular and isotopic compositions to the extracted Maykop samples confirming their genetic relationship. The range in carbon isotope values reflects secular changes within the Maykop Suite source. Unlike some earlier studies, this study showed that all of the oils were generated within the conventional “oil-window” (R_o≈0.9–1.0%). This places the source system at depths in excess of 5 km and emphasizes the role that vertical migration played in the development of the basin's hydrocarbon accumulations. There is evidence that migration was episodic, possibly related to punctuated generation or the opening of conduits through the activity of mud diapirs. Model results also suggest that the rapid Plio–Pleistocene subsidence and sedimentation were the primary controls on hydrocarbon generation.These and other geochemical investigations confirm the potential for the extension of the known petroleum system beyond its current stratigraphic and areal limits.     

南里海盆地下库拉凹陷异常高压与油气成藏

南里海盆地是中、新生代发育的弧后裂谷-前陆复合盆地,其中下库拉凹陷具有快速巨厚沉积、异常高压、泥火山发育、低地热梯度的特点.探讨了下库拉凹陷异常高压形成条件、发育特征及其对油气成藏的影响.异常高压的形成主要与该区快速沉积.巨厚塑性沉积、构造挤压,泥火山活动、富含蒙脱石厚层泥岩发育有关,而温热膨胀、烃类生成、黏土矿物脱水对该区异常地层压力的贡献不大.凹陷内2 000多米深度巳经具有国内罕见的异常高压.由于地层岩性不同,异常高压引起的欠压实在部分构造的泥岩压实曲线和密度曲线上十分明显,而在部分构造中没有反映,并依此把下库拉凹陷中异常高压地层的泥岩压实划分为3种类型.异常高压利于该区储集层物性的保存、油气藏的封闭,控制该区油气分布,促使该区构造和圈闭形成,但也产生了严重的工程难题.     

南里海盆地泥火山构造及其对油气成藏的影响

泥火山构造在地震相上为不连续、弱振幅的空白反射或杂乱反射,呈柱状与围岩不整合接触。其分布规律受盆地应力场和构造活动带的控制,在盆地边缘山前冲断带泥火山最发育,盆地中心发育较少,同一构造带上泥火山沿主断层和背斜发育带走向呈串珠状分布。泥火山构造具有幕式活动的特点,并在浅层伴生放射状正断层和塌陷补偿构造。按照泥火山构造成因和构造特征可以划分为背斜型、走滑断层型和逆冲断层型3种。区域地质背景、挤压走滑应力场下的构造活动、快速而具有特色的沉积地层和地层超压环境是该地区泥火山构造形成的主要原因。泥火山构造对油气生成、运移、聚集、保存和破坏以及构造圈闭形成、储集层发育有不同程度的影响。     

南里海盆地大油气田的形成条件与分布特征

依据南里海盆地中15 个大油气田的资料,应用研究含油气系统的思路与方法,对盆地构造沉积演化及油气地质条件进行剖析,探讨了大油气田的形成条件和分布特征。研究认为,南里海盆地主要发育麦考普组-红层组含油气系统,盆地北缘的大型走滑挤压构造带的油气地质条件最为优越,目前已发现的大油气田集中分布在该构造带上。里海东西两侧岸线附近的褶皱带也具备良好的生储盖条件,有望成为盆地今后油气勘探的有利区带;麦考普组-红层组含油气系统比较年轻,油气的生、运、聚活动仍然活跃,因此,即使是目前勘探程度较高的北缘构造带,仍然具有较大的勘探潜力。     

滨里海盆地盐上层的油气地质特征

通过对滨里海盆地盐上层系的基础地质，石油地质特征的综合分析，可知盆地不同地质的地层，构造，石油地质特征等有明显的差异性，从平面上不同地区盐上层系的差异性出发，对已发现的油气田（藏）的特点和分布规律进行了研究，指出，在盐上层系中，卡拉通－田吉慈隆起区和北里海－阿兹吉尔隆起区为有利勘探目标区；盆地东部延别克－扎尔卡梅斯和扎纳若尔地区以及盆地南部的比克扎尔隆起区为较有利勘探目标区；盆地西部和西南部的阿斯特拉罕－阿克纠宾斯克隆起带的西南坡和西坡以及盆地西北部的乌津地区为具有一定勘探潜力目标区。     

The oil and gas resource base of the Caspian region

The Caspian Sea region's oil and gas potential has attracted the attention of the international oil and gas industry since the late 1980s and early 1990s with the breakup of the Soviet Union when investment in the region became possible. The nations in the Caspian Sea region—Azerbaijan, Iran, Kazakhstan, Russia, Turkmenistan, and Uzbekistan—are already major energy producers. Production is expected to increase with additional investment, introduction of international technology, and the development of new export outlets. The Caspian Sea is sizeable (700 miles north to south). Six geologically discernable hydrocarbon basins underlie its waters (the Caspian Sea countries also have additional onshore basins). Uzbekistan does not directly border the Caspian Sea, but is considered to be in the Caspian region because it shares several of the region's hydrocarbon basins, and because its proposed oil and gas export routes are also shared with the other Caspian countries.     

陕北下寺湾油田储层敏感性研究

为了认识下寺湾油田延长组特低渗透储层开发过程中可能伤害储层的一些因素,在研究其岩石性质及矿物成分特征的基础上,通过敏感性流动试验对该区储层各种潜在敏感性进行了研究。结果表明,该区储层具有中等水敏性、较弱的盐敏性和碱敏性,没有酸敏性和速敏性,同时也分析了各种敏感性的成固机制,为油田开发提供可靠的研究及决策依据。