• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Petroleum science >Characteristics of fault zones and their control on remaining oil distribution at the fault edge: a case study from the northern Xingshugang Anticline in the Daqing Oilfield, China
【24h】

Characteristics of fault zones and their control on remaining oil distribution at the fault edge: a case study from the northern Xingshugang Anticline in the Daqing Oilfield, China

机译：断层带的特征及其对断层边缘剩余油的控制-以大庆油田北部杏树岗背斜为例

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Most major oil zones in the Daqing Oilfield have reached a later, high water cut stage, but oil recovery is still only approximately 35?%, and 50?% of reserves remain to be recovered. The remaining oil is primarily distributed at the edge of faults, in poor sand bodies, and in insufficiently injected and produced areas. Therefore, the edge of faults is a major target for remaining oil enrichment and potential tapping. Based on the dynamic change of production from development wells determined by the injection–recovery relationship at the edge of faults, we analyzed the control of structural features of faults on remaining oil enrichment at the edge. Our results show that the macroscopic structural features and their geometric relationship with sand bodies controlled remaining oil enrichment zones like the edges of NNE-striking faults, the footwalls of antithetic faults, the hard linkage segments (two faults had linked together with each other to form a bigger through-going fault), the tips of faults, and the oblique anticlines of soft linkages. Fault edges formed two types of forward micro-amplitude structures: (1) the tilted uplift of footwalls controlled by inverse fault sections and (2) the hanging-wall horizontal anticlines controlled by synthetic fault points. The remaining oil distribution was controlled by micro-amplitude structures. Consequently, such zones as the tilted uplift of the footwall of the NNW-striking antithetic faults with a fault throw larger than 40?m, the hard linkage segments, the tips of faults, and the oblique anticlines of soft linkage were favorable for tapping the remaining oil potential. Multi-target directional drilling was used for remaining oil development at fault edges. Reasonable fault spacing was determined on the basis of fault combinations and width of the shattered zone. Well core and log data revealed that the width of the shattered zone on the side of the fault core was less than 15?m in general; therefore, the distance from a fault to the development target should be larger than 15?m. Vertically segmented growth faults should take the separation of the lateral overlap of faults into account. Therefore, the safe distance of remaining oil well deployment at the fault edge should be larger than the sum of the width of shattered zone in faults and the separation of growth faults by vertical segmentation.
机译：大庆油田的大多数主要石油区已经达到了后期的高含水期，但石油采收率仍仅为约35％，还有50％的储量有待回收。剩余的油主要分布在断层边缘，贫砂体中以及注入和生产不足的地区。因此，断层边缘是剩余油富集和潜在开采的主要目标。基于断层边缘注入与采出关系决定的开发井产量动态变化，我们分析了断层结构特征对边缘剩余油富集的控制。我们的研究结果表明，宏观结构特征及其与砂体的几何关系控制着剩余的富油区，如NNE走向断层的边缘，对生断层的下盘，坚硬的连接段（两个断层相互连接在一起形成较大的贯通断层），断层尖端以及软连接的斜背斜线。断层边缘形成了两种类型的正向微振幅结构：（1）由逆断层控制的底盘倾斜隆起;（2）由综合断层控制的上盘水平背斜线。剩余的油分布由微振幅结构控制。因此，断层距大于40？m的NNW撞击假断层下盘的底壁倾斜隆起，硬连接段，断层尖端和软连接倾斜斜线等区域都有利于挖掘。剩余的石油潜力。多目标定向钻井用于在断层边缘保留剩余的油。根据断层组合和破碎带宽度确定合理的断层间距。井芯和测井数据表明，断层芯侧面破碎带的宽度通常小于15μm。因此，从断层到开发目标的距离应大于15？m。垂直分割的生长断层应考虑断层横向重叠的分离。因此，断层边缘剩余油井布放的安全距离应大于断层破碎区宽度与垂直断层分离生长断层的总和。

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