Fracture detection in oil-based drilling mud using a combination of borehole image and sonic logs
Fracture detection in oil-based drilling mud using a combination of borehole image and sonic logs
复制标题
结合钻孔图像和声波测井进行油基钻井泥浆裂缝检测
DOI：
10.1016/j.marpetgeo.2017.03.035
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发表时间：
2017-06
影响因子：
4.2
通讯作者：
Xiao Chengwen
中科院分区：
文献类型：
--
作者：
Lai Jin;Wang Guiwen;Fan Zhuoying;Wang Ziyuan;Chen Jing;Zhou Zhenglong;Wang Shuchen;Xiao Chengwen
库车坳陷下白垩统巴什基奇克砂岩埋藏深（5.5- 7.1km），是重要的裂缝性储层。在这些高温高压钻井环境中，油基泥浆用于限制钻井风险和提高效率，使得使用基于连续性的成像测井的裂缝检测变得困难。最大水平应力（SHmax）的趋势接近北-南（0-10°）的基础上，钻井诱导的裂缝和钻孔崩落的方向。通过岩心、薄片和成像测井等方法对巴什基奇克砂岩储层裂缝进行描述，结果表明，天然裂缝普遍为张开型，裂缝从完全张开到被方解石和粘土矿物封闭。开放性断裂以陡倾或垂直为主，主要走向为南北向。在同一口KS 2-2-12关键井的成像测井资料上，对油基泥浆和水基泥浆的裂缝可见度进行了对比。FMI-HD测井比OBMI成像测井更好地成功地检测了油基泥浆中的大（0.1 mm孔径）垂直裂缝，并且两种成像工具在检测大倾角裂缝方面具有相似的能力。由于UBI工具不受油基泥浆的影响，因此大多数裂缝都可以在UBI图像上找到。在裂隙带中可以观察到体积密度的微小负偏差，并且裂隙的存在明显地导致声波传播时间的增加。DSI工具的全波形与电成像测井相结合检测裂缝带。声波的速度和振幅对裂缝都很敏感，根据斯通利波的衰减可以识别裂缝带。岩心、成像测井和全波声波测井的组合提供了对油基泥浆环境中裂缝的全面检测。
The deeply buried (5.5–7.1 km) Lower Cretaceous Bashijiqike sandstones are important fractured reservoirs in the Kuqa depression. In these high temperature-high pressure drilling environments, oil-based muds are used to limit drilling risks and improve efficiency, making facture detection using resistivity-based image logs difficult. The maximum horizontal stress (SHmax) trends close to North-South(0–10°) based on orientations of the drilling-induced fractures and borehole breakouts. Core descriptions, thin sections and image logs used to describe the fractures in the Bashijiqike sandstone reservoirs show that opening-mode natural fractures are common, and the fractures range from fully open to sealed by calcite and clay minerals. The open fractures are dominantly steeply dipping or vertical and primarily strike north-south. Locally horizontal fractures or fractures with low angle dip are detected.We compare fracture visibility on image logs acquired in the same KS 2-2-12 key well in oil-based mud and water-based mud. FMI-HD logs successfully detect large (0.1 mm aperture) vertical fractures in oil-based mud better than OBMI image logs, and the two imaging tools have a similar ability in detecting the high dip angle fractures. Since the UBI tool is not affected by oil-based muds, most of the fractures can be picked out on UBI images. Minor negative deviations of bulk density could be observed in fractured zones, and the presence of fractures obviously causes an increase in sonic transit time. Full waveforms from DSI tools combined with electrical image logs detect fractured zones. Both the velocity and amplitude of the sonic waves are sensitive to fractures, and the fractured zones could be identified according to the attenuation of Stoneley waves. The combination of cores, image logs, and full-wave sonic logs offers comprehensive detection of fractures in oil-based mud environments.
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影响因子：
4.2
作者：
Xiaowen Guo;Keyu Liu;C. Jia;Yan Song;Mengjun Zhao;Q. Zhuo;Xuesong Lu
通讯作者：
Xiaowen Guo;Keyu Liu;C. Jia;Yan Song;Mengjun Zhao;Q. Zhuo;Xuesong Lu
影响因子：
3.5
作者：
M. Ameen;K. Macpherson;Maher Almarhoon;Z. Rahim
通讯作者：
M. Ameen;K. Macpherson;Maher Almarhoon;Z. Rahim
影响因子：
--
作者：
R. Plumb;S. Hickman
通讯作者：
R. Plumb;S. Hickman
影响因子：
2.9
作者：
X. Nie;C. Zou;L. Pan;Zhaohui Huang;Dongming Liu
通讯作者：
X. Nie;C. Zou;L. Pan;Zhaohui Huang;Dongming Liu
DOI：
--
发表时间：
2015
期刊：
--
影响因子：
--
作者：
Lai Ji
通讯作者：
Lai Ji