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山西中元古代汝阳群分枝管状藻体和显微环状螺旋加厚管体的发现 总被引：2，自引：0，他引：2
目前已知中元古代(1600~1000 MaBP)生物化石多产自硅化碳酸岩, 它们以个体很小(通常15~20 mm)的简单球形、丝状化石类型为主, 其中大多被视为蓝细菌. 页岩是保存中元古代生物圈古生物信息的另一来源, 球形、具刺疑源类、及丝状化石通常见于中元古代页岩. 报道产自我国山西中元古代汝阳群的一个不寻常的管状化石组合, 其中有具分枝的管状丝体; 有具环形螺旋加厚的管体, 它们可能是灭绝生物用以适应干旱环境的管状结构物. 相似文献
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介绍ＣＹＦ—０．０５／ＣＹＦ—０．１型油水分离器的主要技术参数、工作原理、设计计算、台架试验。试验表明，经本装置处理后的油污水满足ＧＢ３５５２—８３“船舶污染物排放标准”所规定的排放标准。 相似文献
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《地震工程与工程振动》2021,41(5)
卧式三相分离器是油田地面工程中重要的工业设备之一,预测其在不同强度地震作用下的破坏模式和破坏等级对油田防灾减灾工作具有十分重大的现实意义。本研究基于震害经验和可靠度理论,考虑多种破坏模式,参考工业设施破坏等级的确定方法,给出了三相分离器对应不同破坏模式的破坏等级划分方法以及三项分离器综合破坏等级划分方法。结合实例,采用有限元软件ADINA建立了考虑流固耦合效应的有限元模型进行弹塑性地震响应时程分析,提取目标参数进行了三相分离器的震害预测工作。本研究可为卧式三相分离器等油田卧式设备的地震灾害风险排查工作提供借鉴。 相似文献
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ZHANGKang WANGDarui 《《地质学报》英文版》2004,78(3):866-872
Almost all the oil and gas reservoirs developed in marine sedimentary strata of China have undergone processes of multi-phase reservoir formation and later modification. The irregular reservoirs are classified into three types as the Naxi, Tahe and Renqiu ones, increasing successively in the development degree of karstificated pores and fissures and the connection degree of independent reservoirs. In these reservoirs, the unity in the fluid feature, pressure and oil-gaswater interface also increases successively from the Naxi to the Renqiu type. The main body of Ordovician reservoirs of the Tahe Oilfield in the Tarim Basin is a network pool rather than a stratified, massive, stratigraphically-unconformed or weathering-crust one. The fluid nature of oil, gas and water, the interface positions and the pressures, as well as the dynamic conditions of fluids within the reservoirs during the production are all different from those in stratified or massive oil and gas reservoirs. Carbonates in the Akekule uplift and the Tahe Oilfield are assemblages of various types of reservoirs, which have an overall oH-bearing potential and obvious uneven distribution. Testing and producing tests are the major means to evaluate this type of reservoirs and acid fracturing improvement is a key link in petroleum exploration and development. 相似文献
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2月3日,江西省核工业地质局机械研究所自主研发的螺旋管高效换热器获得了中华人民共和国国家知识产权局颁发的“实用新型专利证书”。 相似文献
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