苏北盆地溱潼凹陷阜宁组敏感性评价及钻井液优选

发布时间：2018-05-11 04:29

本文选题：阜宁组 + 敏感性评价　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：苏北盆地溱潼凹陷阜宁组属低渗~特低渗储层。阜宁组主要为砂、泥岩互层,含易破碎的凝灰岩、脆性泥页岩等,钻井时,因井壁坍塌、掉块、剥落等原因,容易导致蹩跳、埋钻等井下事故。钻井液设计注重防渗漏、抑制造浆、缩径、井眼稳定等技术,对储层伤害程度、油层保护工作针对性不强。本课题选择苏北盆地溱潼凹陷小油田有代表性储层样品,全面进行孔、渗、饱、薄片、X衍射、电镜能谱等基础资料分析,总结了储层特征规律,同时做了大量流动实验,对目前苏北勘探井使用的钻井液进行了性能分析、油层保护分析、经济分析并做出了客观评价,室内实验与矿场应用相结合,研究出适合各油田的钻井液配方。研究区储层岩性以细砂岩为主,少量粉砂岩,砂岩成分以石英为主,分选较好,次棱角~次圆状,为低孔低渗储层,纵向变化较大,非均质性严重。完成了62套室内钻井液损害评价实验,研究了正电胶聚合物钻井液体系,指出叶甸油田采用屏蔽暂堵技术和金属两性离子聚合物钻井液能达到保护油气层的目的。草舍油田采用屏蔽暂堵技术和改性正电胶聚合物钻井液,或者使用钾基聚合物钻井液都能基本满足要求,渗透率恢复值能达到80%以上。
[Abstract]:Funing formation in Qintong sag of Subei Basin belongs to low permeability-very low permeability reservoir. Funing formation is mainly composed of sand and mudstone interbedded, containing easily broken tuff, brittle shale and so on. During drilling, downhole accidents such as leaping and burying are easy to be caused by well wall collapse, block dropping, spalling and so on. Drilling fluid design focuses on seepage prevention, slurry inhibition, diameter reduction, hole stability and other techniques, which is not specific to reservoir damage and reservoir protection. In this paper, the representative reservoir samples of Qintong sag in Subei Basin are selected to analyze the basic data of pore, permeability, saturation, thin slice X-ray diffraction, electron microscope energy spectrum, and so on. The characteristics of reservoir are summarized, and a large number of flow experiments are done at the same time. The performance analysis, reservoir protection analysis, economic analysis and objective evaluation of drilling fluid used in exploration wells in northern Jiangsu are carried out. The formula of drilling fluid suitable for oil fields is developed by combining laboratory experiments with field applications. In the study area, the lithology of the reservoir is dominated by fine sandstone, a small amount of siltstone, quartz is the main component of sandstone, the separation is better, the secondary angle is about subcircular, the reservoir is low porosity and low permeability, the longitudinal variation is great, and the heterogeneity is serious. 62 sets of indoor drilling fluid damage assessment experiments were completed, and the positive gel polymer drilling fluid system was studied. It was pointed out that shielding temporary plugging technology and metal amphoteric polymer drilling fluid could be used to protect oil and gas reservoir in Yadian Oilfield. Shielding temporary plugging technology and modified positive adhesive polymer drilling fluid or potassium base polymer drilling fluid can basically meet the requirements in Caoshe Oilfield. The permeability recovery value can reach more than 80%.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE254

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