• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Technology advances >Specifying Lengths of Horizontal Wells in Fractured Reservoirs
【24h】

Specifying Lengths of Horizontal Wells in Fractured Reservoirs

机译：指定裂缝性油藏中水平井的长度

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

When drilling a horizontal well in a fractured reservoir the aimrnis to intersect those fractures that are capable of providing arnconduit for fluid flow. Key factors influencing the success ofrna horizontal well include the choice of horizon and therndirection of drilling. However, even if these have beenrndetermined, the drilling distance required to achieve the aimrnremains a problem.rnNew methods have been developed which allow anrnappropriate drilling distance to be constrained on a sitespecificrnbasis, where opening mode fractures are dominant.rnThese methods utilize knowledge gained through empiricalrnstudies of the scaling properties of fracture populations.rnStatistical constraints on the required well length arerncalculated through measurement of the aperture sizerndistribution of the fracture population, combined withrnobservation of the history of fracture fill. Calculations ofrnfracture permeability are made, based on the scale of datarnacquisition and are compared with matrix permeability.rnA case study of opening-mode fractures in the AustinrnChalk reveals that large, potentially open, fractures arerncommonly clustered, the distance between clusters rangingrnfrom ~1m to ~50m. Aperture size distributions follow powerrnlaws and spacing size distributions are negative logarithmic orrnlognormal. The aperture size at which fractures are open tornfluids is variable (0.14-11mm). Fracture permeability isrndependant on the scale at which it is measured and has beenrndetermined at 7.1D (for 18m of Lower Austin Chalk core) andrn286D (for 300m of Upper Austin Chalk outcrop). Theserncalculated fracture permeabilities are several orders ofrnmagnitude larger than the typical Austin Chalk matrixrnpermeability of 0.03-1.27mD.
机译：当在裂缝储层中钻水平井时，瞄准器将那些能够为流体流动提供条件的裂缝相交。影响水平井成功的关键因素包括水平的选择和钻井的方向。然而，即使已经确定了这些，实现目标所需的钻距仍然是一个问题。已经开发了新的方法，该方法允许将适当的钻距限制在特定位置的基础上，其中以开模裂缝占主导。这些方法利用了通过经验研究获得的知识通过测量裂缝口的孔径大小分布以及结合裂缝填充历史，计算出对所需井长的统计约束。基于数据采集的规模，计算了裂缝的渗透率，并与基质渗透率进行了比较。rn以奥斯汀粉笔的开放型裂缝为例，研究发现大的，潜在开放的裂缝通常聚集在一起，簇之间的距离从〜1m到〜 50公尺。孔径大小分布遵循幂律，间隔大小分布为负对数或对数正态。裂缝是开放的，破裂的流体的孔径大小是可变的（0.14-11mm）。裂缝渗透率取决于测量的尺度，并已确定为7.1D（对于下奥斯汀白垩岩芯为18m）和286D（对于上奥斯汀白垩岩层为300m）。这些计算得出的裂缝渗透率比典型的奥斯汀粉笔基质渗透率0.03-1.27mD大几个数量级。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号