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针对大庆油田深层致密气埋藏深,储层砾岩、火山岩裂缝发育,水敏性强,钻井过程中易发生漏失、垮塌、缩径及高温钻井液性能变差等复杂,且深层水平井钻进会带来摩阻、携岩和储层污染及使用油基钻井液存在成本高、后期环保压力大等难题,在分析总结前人研究成果及经验基础上,从致密气藏地质特征及深层水平井钻井难点出发,明确了钻井液技术对策,通过开展聚胺和聚醚多元醇“双聚”抑制、封堵防塌剂的研究,配合自主研制的新型高效随钻封堵材料,研发出一套适合于深层致密气藏水平井施工的双聚胺基钻井液技术。室内研究及现场应用表明,该钻井液具有较强的封堵防塌、井眼清洁和润滑防卡能力,抗温达180 ℃以上,有效地解决了深层水平井漏失、垮塌、携屑、润滑问题和储层保护问题,保证了深层水平井的顺利施工,创造了大庆油田深层水平井钻井周期最短（109 d）,井深最深（5048 m）,水平段最长（969.22 m）,井底温度最高(180 ℃)等几项新纪录,完全满足了徐家围子地区深层致密气藏的钻探需求,为深层水平井安全、快速、高效钻井提供了技术保障。 相似文献
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AD205H井是伊拉克艾哈代布油田的首口简化三开水平井,上部水敏泥岩易分散造浆、缩径,中部存在高压盐水层、燧石结核地层,储层灰岩含量高,从而增加了施工周期,制约了该区水平井发展步伐。针对上述钻井难点,开展了钻井液抑制性、抗温性、抗盐性、抗污染评价试验,研制了混油聚磺钻井液体系。现场应用表明,聚磺钻井液体系抗污染能力强,施工过程中性能稳定。对于上部水敏性泥浆有很强的抑制作用,对于下部易渗漏的灰岩地层有很好的封堵作用,减少了井下复杂事故的出现。此井为该地区简化井身结构第一口井,低密度优质钻井液保证了该井的顺利施工,创造了该油田钻井施工的多项纪录。 相似文献
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为解决鄂尔多斯盆地东缘煤层气区块钻井过程中所遇到的裂缝性漏失、井壁坍塌、机械钻速低等实际难题,从地质条件入手,分析出困难所产生的特点与原因,采用室内分析与现场试验相结合的研究方法,提出相应处理措施。为提高整体开发效率,对丛式井组和井身轨迹进行优化,形成保持井壁稳定且降低储层损害的绒囊钻井液体系;对于裂缝性漏失,研制出准确测定漏点的5参数测试仪,在此基础上以封堵泥浆为重点研究对象,经实践形成针对不同漏失规模和漏速的封堵技术。目前,研究成果已成功指导该区500余口煤层气井的钻井工作。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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正1 Introduction Geological studies established on several sections in Lanping-Simao basin have shown that the salt-bearing strata of Mengyejing formation(Yunlong Fm.in Lanping basin)are constituted by an alternation of salt layers and interbedded facies.The latter consists mainly of mudstones,and mudstone-rich conglomerate.The mineralogy and geochemistry of salt-bearing beds and 相似文献
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正On 22nd April 2014,with the approach of the 45th World Earth Day,China’s Ministry of Land and resources issued the status of China’s mineral resources in 2013.The first task of the prospecting breakthrough strategy action implemented in the last five years has been completed,and China’s security capacity for mineral resources has been significantly improved.In the 相似文献
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正There are more than 700 salt lakes with area of more than 1km2 on the Qinghai-Tibet Plateau of China.In recent years,an oilfield brine was also found in the Nanyishan Section of Qaidam Basin in the Qinghai-Tibet 相似文献
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正1 Introduction Physical and numerical models are constructed to investigate the evolution and mechanism of salt migration driven by tectonic processes.In recent years,we have designed and ran series of models to simulate salt 相似文献
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YUAN Qin LI Jianguo QIN Zhanjie WEI Haicheng SHENG Shurong SHAN Fashou 《《地质学报》英文版》2014,88(Z1):276-276
正The study of Cretaceous-Palaeogene salt-bearing strata of the Khorat Basin Laos and the Lanping-Simao Basin in Yunnan,China has an great significance not only in explaining the basin evolution and the genesis of potash 相似文献
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正Potash is one of the long-term scare deposits in China,and potash prospecting has long been listed as a key brainstorm project for our nation and geological prospecting units.There have been considerable studies in search for potash deposits in the Kuqa depression of the Tarim basin(Jackson et al.,1991;Gemmer et al.,2004;Vendeville,2005;Vendeville and Jackson,1992a,1992b), 相似文献
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正1 Introduction Qaidam Basin in Qinghai,including 43 salt lakes with multiple dominant mineral such as potassium,magnesium,lithium etc.,is the most intensive distribution of Saline 相似文献