成熟探区油气勘探思路及方法——以济阳坳陷为例

经过40多年勘探，济阳坳陷整体处于较成熟一成熟勘探阶段。随着勘探程度的不断提高，隐蔽油气藏已成为主要勘探目标。经过多年的理论研究与勘探实践，胜利油田已初步形成了一套系统的隐蔽油气藏勘探理论和技术方法，而更为重要的是胜利油田勘探工作者根据勘探阶段的变化而及时作出了勘探思路和方法的调整。通过回顾济阳坳陷的勘探实践，全面阐述了成熟探区勘探工作中如何坚定信心、解放思想、探索正确的勘探思路，以及把科研工作系统化，夯实发展基础，扎实开展各项工作的勘探方法，以达到不断深化济阳坳陷隐蔽油气藏勘探工作、实现油田持续稳定发展的目标。     

膨润土对陈醋的澄清和稳定作用

以膨润土为原料,考察其对不同陈醋的澄清稳定作用,结果表明彭润土对高酸度低固含量的陈醋具有很好的处理效果,且无需过虑,是一种简便可行易于推广的办法。     

CO2 sequestration through enhanced oil recovery in a mature oil field

Recent advances in enhanced oil recovery (EOR) technology create new opportunities for CO₂ sequestration. This paper proposes a technical–economic model for underground storage of CO₂ emitted by a fertilizer industry in the Northeast of Brazil, in a hypothetical mature oil reservoir through EOR operation. Simulations based on mass, energy and entropy balances, as well as economic analysis, were assessed for the process of CO₂ sequestration combined with EOR. This model takes into account the energy requirements for the whole CO₂ sequestration process, as well as the emissions inherent to the process. Additionally, a breakdown cost methodology is proposed to estimate the main financial determinants of the integrated EOR with CO₂ sequestration (costs of CO₂ purchase, compression, transportation and storage). Project evaluation is derived from a cash flow model, regarding reservoir production profile, price and costs, capital expenditures (CAPEX), operating expenditures (OPEX), carbon credits, depreciation time, fiscal assumptions etc. A sensitivity analysis study is carried out to identify the most critical variables. Project feasibility, as expected, is found to be very sensitive to oil price, oil production, and CAPEX. Moreover, there is the contribution from the mitigation of the greenhouse gas (GHG) by storing a significant amount of CO₂ in the reservoir where it can remain for thousands of years.     

对大庆老区水平井水淹问题的认识

随着水平井钻井工艺水平的提高及钻井成本的降低,利用水平井技术挖潜厚油层顶部的剩余油已成为改善油田开发效果的途径之一。在对国内外水平井技术现状分析的基础上,提出了大庆老区厚油层水平井水淹问题的几点认识以及今后如何应用水平井技术的初步建议。     

Antioxidant properties of durian fruit as influenced by ripening

The antioxidant properties of durian (Durio zibethinus Murr., cv. Mon Thong) at different stages of ripening were investigated using fluorometry, UV spectroscopy, and HPLC/DAD analyses. Total polyphenols, flavonoids, anthocyanins and flavanols in ripe durian were significantly higher (p < 0.05) than in mature and overripe fruits. Free polyphenols and flavonoids were at lower levels than hydrolyzed ones. Caffeic acid and quercetin were the dominant antioxidant substances in ripe durian. In these fruits, methanol extracts contained a relatively high capacity of 74.9 ± 7.1% inhibition using β-carotene-linoleic acid assay. Ferric-reducing/antioxidant power (FRAP) and cupric-reducing antioxidant capacity (CUPRAC) assays supported this finding. The correlation coefficients between polyphenols and antioxidant capacities of durian samples with all applied assays were about 0.98. In conclusion, the bioactivity of ripe durian was high and the total polyphenols were the main contributors to the overall antioxidant capacity.     

气相色谱/质谱法联用分析山西老陈醋香味成分

采用同时蒸馏萃取法(SDE)和液液萃取法(LLE)分别对山西老陈醋进行预处理,应用色质联用(GC/MS)技术对其进行定性定量分析.结果表明,山西老陈醋中检出43种香气成分,其中以(e)-3-(2-羟苯基)-2-丙烯酸、加大麻素、3-(2-呋喃-2-苯基-2-丙烯、2-甲氧基-6-壬酰基-4H-吡喃-4-酮、8-羟基-辛酸、对羟基苯甲醛、对羟基苯乙酮、醋酸、戊酸、肉桂酸、己酸、苯甲酸在山西老陈醋中的含量较高;使用同时蒸馏萃取法容易检测其中的低沸点物质,而使用液液萃取法检测较高沸点物质的灵敏度明显高于同时蒸馏萃取法.     

具有阶段结构与功能反应的捕食-食饵系统的最优捕获策略

讨论了具有阶段结构与功能反应的捕食一食饵模型．将食饵种群分为幼年和成年,假定捕食者与幼年食饵和成年食饵之间具有不同的功能反应函数,依据模型分析了最优的种群开采策略,并且给出了取得最优策略的条件．