安塞油田王界油区长8油层组储层特征及成因分析

安塞油田地处鄂尔多斯沉积盆地一级构造单元伊陕斜坡中部.王界油区是安塞油田延长组合油层系的主要含油区块之一.本文通过扫描电镜、铸体薄片、常规压汞等有效的分析方法研究了研究区长8油层组的储层特征及其成因机制.结果表明,该套储层储集岩主要为一套浅灰色、灰白色块状中-细粒长石砂岩:主要经历了压实压溶作用、胶结作用、溶蚀作用等一系列成岩作用过程,成岩作用复杂,成岩作用对影响了储集层物性特征:储层孔隙类型以残余粒间孔为主.     

温西—芭蕉场地区嘉陵江组二段储层特征研究

根据川东北地区下三叠统嘉陵江组二段沉积、构造发育特点,通过对测井、钻井资料及实验室各项分析,对嘉陵江组二段储层特征进行研究。认为储层的储集岩类型为砂屑云岩、砂屑灰岩和少量的细粉晶云岩,主要储集空间为粒间孔和粒内溶孔,主要储层类型为裂缝—孔隙型,为低孔、低渗储层。储层发育的控制因素主要是沉积相、成岩作用和构造作用,其中裂缝的发育对储层的储集性能有较大改善。建议以台内滩亚相作为今后勘探的重点沉积相带。     

三维地质建模技术在储层研究中的应用

在沉积、成岩、测井综合解释预测等研究基础上,应用三维可视化地质建模软件Petrel,对储层进行高精度的三维地质模型建立,包括地质构造模型、沉积微相模型及储层属性参数模型,并进行地质模型检验和储量拟合,为下步的储层开发提供可靠依据。     

乌尔逊凹陷南屯组次生孔隙发育特征及成因分析

本文通过对岩芯、岩石薄片的观察,对乌尔逊地区南屯组储层进行了成岩作用研究,结果表明压实作用和胶结作用是深层储层物性变差的主要因素;溶蚀作用形成的次生孔隙成为南屯组储层主要储集空间;有机质热演化、淋滤作用和异常高压所导致的溶蚀作用是研究区次生孔隙形成的主要原因。     

克拉玛依油田特低渗透下乌尔禾组储层渗流机理研究

新疆克拉玛依油田下乌尔禾组储层是一个低孔、特低渗透、微裂缝发育的厚层状砾岩油藏,根据储层物性特征和渗流能力评价,反映了储层低孔低渗的特征。通过对比新疆克拉玛依、大庆、长庆同等渗透率级别岩心对比,表明新疆克拉玛依油田下乌尔禾组特低渗储层岩心喉道分布曲线的峰值最低,大级别喉道含量最高,大喉道的存在为有效渗流能力提供了良好的通道,同时又受到小吼道的限制作用;可动流体饱和度分布较宽,相对较大;启动压力梯度和储层渗透率大小关系密切,储层渗透率越低,启动压力梯度越大,说明了其开发难度大的原因。依据这三个参数对低渗透储层进行分类和评价,新疆克拉玛依油田下乌尔禾组储层特低渗储层以三类储层为主,部分二类下限储层,表明有一定的开发潜力,但开发难度较大。     

探讨复杂岩性储层识别及评价技术

文章总结了河南油田在灰岩储层、砂砾岩储层、低孔低渗储层评价中的难点,重点阐述5700成像测井在这些储层评价中的作用、应用效果,为国内同类储层评价提供参考和借鉴作用。     

车镇凹陷沙二段优质储层发育、分布规律分析

车镇凹陷沙二段储层物性是影响该段成藏与否的重要因素之一。本文从沙二段储层物性特征分析入手,对优质储层进行了界定,分析了古地形及物源、水动力三个因素对储层的丰度、优质储层发育、分布控制作用,其中沉积古地形及物源控制了储层的丰度,沉积水动力条件控制了优质储层的发育。最终,对车镇凹陷沙二段优质储层在平面上及垂向上发育的规律进行了描述。     

EPT储层预测技术在苏德尔特地区油气勘探中的应用

EPT储层预测技术在海拉尔盆地苏德尔特地区的滚动勘探开发中的应用,取得了可喜的地质成果。本文以苏德尔特地区的主要勘探目的层-布达特群、兴安岭群和南屯组储层预测为实例,阐述了如何综合运用EPT的储层预测特色技术进行复杂勘探目标的储层研究,并且在预测的储层体内,利用地震衰减梯度等多信息融合技术,预测有利储层分布。     

页岩气储层录井配套技术应用新进展

论文主要分析了页岩的地质情况,结合其特征,分析气储层的特殊性。论文通过总结当前存在的问题,分析与总结经验,探究页岩气储层录井技术的要点。论文提出页岩气储层的岩石内硅质成分占比较高,且钙含量也比较高,岩石既坚硬又脆弱,在钻井阶段,要使钻井速度保持在较高水平。通过合理使用综合气相色谱仪,可发现油气开发过程中存在的问题,其应用优势比较明显。     

征沙村地区超深致密储层有效改造技术

针对征1区块储层存在低孔、特低渗透的特点,结合区块采取的2口井措施改造存在的高压,加砂困难等难点,调研了国内外类似储层改造的经验和做法,提出了储层降低施工压力的方法和改造的技术对策。提出了直井大排量分步加砂压裂,裸眼水平井多级分段压裂改造,通过低摩阻、加重压裂液体系的应用,配套压裂施工管柱优化、高压泵组和高压井口,进行大规模压裂改造实现此类储层有效动用。     

云南华宁县尖山铅锌矿成因分析和找矿的重要意义

以前发现的赋矿层都是碳酸盐岩,而该矿是泥质粉砂岩,此含矿层是目前本县境内新发现的铅锌矿含矿层位。矿床成因属于沉积成岩矿床类型,兼有成岩后期矿床性质。     

大吉山钨矿成矿规律分析

通过对大吉山钨矿床成矿期成矿阶段、成岩成矿演化、矿床分带及矿床成因分析,提出成矿模式,找出矿床成矿规律。     

Does Skill Content Explain Total Trade and Intra‐Industry Trade?*

This study compares the results of skill content tests for types of trade flows under alternative assumptions about the technologies used to produce imports and exports. For trade between high‐ and middle‐income countries, we show that the match between the actual skill content of trade and that predicted by endowments in a Heckscher–Ohlin–Vanek framework improves substantially if technological heterogeneity across countries is allowed for and if the factor content of intra‐industry trade is included with that of inter‐industry trade. Endowment differences are important in explaining net trade and vertical intra‐industry trade, but not horizontal intra‐industry trade.     

The Effectiveness and Targeting of Television Advertising

Television networks spend about 16% of their revenues on tune-ins, which are previews or advertisements for their own shows. In this paper, we examine two questions. First, what is the informational content in advertising? Second, is this level of expenditures consistent with profit maximization? To answer these questions, we use a new and unique micro-level panel dataset on the television viewing decisions of a large sample of individuals, matched with data on show tune-in advertisements. The difference in effectiveness of advertisements between “regular” shows (about which viewers are assumed to have substantial information a priori) and “specials” (about which they have very little) reveals the value of information in advertisements and the different roles that information can play. The number of exposures for each individual is likely to be correlated with their preferences, since networks target their audiences. We address this endogeneity problem by controlling for observed, and integrating the unobserved, characteristics of individuals, and find that the estimated effects of tune-ins are still large. Finally, we find that actual expenditures on tune-ins closely match the predicted optimal levels of spending.     

Equity premium prediction and optimal portfolio decision with Bagging

We propose using the statistical method of Bagging to forecast the equity premium out-of-sample for multivariate regression models. Bagging allows for the flexible and efficient extraction of valuable informational content from a large set of predictors, leading to statistically and economically significant gains relative to not only the historical mean, but also other soft-threshold methods such as forecast combinations and shrinkage estimators in our empirical results. Furthermore, we find that the source of economic gains for Bagging primarily comes from the fact that it encourages the investor to actively manage portfolio by flexibly utilizing short selling or leveraging to better time the market following correctly prognosticated trends. However, other strategies such as forecast combinations keep the equity shares nearly fixed regardless of the predicted market prospect.     

三塘湖盆地马朗凹陷石炭系火山岩储层成岩作用研究——成岩作用对储集空间演化的影响

通过岩心描述、岩石薄片鉴定、孔隙特征分析,认为本区石炭系火山岩以中基性岩浆岩为主。主要岩石类型为熔岩及火山碎屑岩;储集空间为原生孔隙、次生孔隙和复合孔隙,原生缝、次生缝和复合缝。储集空间在不同成岩阶段所受影响不同,其中溶解作用对储集空间的演化影响最为显著。     

Corporate climate-related voluntary disclosures: Does potential greenwash exist among Australian high emitters reports?

This study examines the issue of greenwashing among corporate high emitters subject to government scrutiny. To do so, we investigate the relationship between the actual environmental performance, measured as carbon emissions, of companies subject to the Australian National Greenhouse Energy Reporting Act 2007 (NGER) and their climate-related voluntary disclosures. To measure climate-related disclosure, we construct a climate-related disclosure index based on four prominent frameworks and score corporate report content against that Index. Using a sample of 150 companies with NGER emissions data for Years 2016 and 2017, a period that precedes the issuance of recommendations for disclosure by the Task Force on Climate-Related Financial Disclosure (TCFD), our regression results show a disappointingly low level of climate-related disclosure by most companies. We also find a negative relationship between climate-related disclosure and 1-year lagged environmental performance among companies exhibiting a year-on-year rise in carbon emissions. That is, our findings provide evidence of potential greenwashing by poor environmental performers, presumably to change negative perceptions by stakeholders, as predicted by socio-political theories. In contrast, we find no evidence of greenwashing among companies experiencing a year-on-year decrease in emissions.     

原油降凝剂的研究进展及发展趋势

介绍了原油降凝剂的产生、种类及在国内外的发展现状。分析和探讨原油降凝剂的主要作用机理,并对未来降凝剂的发展趋势进行预测。