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The Niger Delta basin fracture pressure prediction
Environmental Earth Sciences ( IF 2.8 ) Pub Date : 2020-07-01 , DOI: 10.1007/s12665-020-09081-5
Olalere Oloruntobi , Omolola Falugba , Oluchi Ekanem-Attah , Chukwunweike Awa , Stephen Butt

Accurate knowledge of formation fracture pressure is essential to optimize well design at all stages of the field development. However, erroneous prediction of formation fracture pressure can lead to process safety incidents such as surface and underground blowouts. While fracture pressure prediction models have been developed for some sedimentary basins, it is difficult to transfer these models to areas beyond the regions of study. In the Niger Delta basin, few fracture pressure prediction models have been developed. However, these models were developed primarily from leak-off test data acquired from the normally pressured intervals. Basically, the existing Niger Delta fracture pressure prediction models lack the leak-off test measurements in the overpressure intervals, because such data are not available. In this paper, a new fracture pressure prediction model that can be applied to normally pressured intervals and overpressure zones is being proposed. Model development is based on establishing a relationship between fracture pressure, true vertical depth and magnitude of overpressure using several leak-off test data acquired from over 100 wells in various fields scattered across the basin. Unlike the previous models, the newly developed model incorporates leak-off test measurements from the overpressure intervals in the basin. In general, the newly proposed model can be used with a high degree of confidence to predict the fracture pressure required for safe and economic well planning across the entire basin.

中文翻译:

尼日尔三角洲盆地裂缝压力预测

准确的地层裂缝压力知识对于在油田开发的所有阶段优化油井设计至关重要。但是,对地层破裂压力的错误预测可能会导致过程安全事件,例如地面和地下井喷。尽管已经为某些沉积盆地开发了裂缝压力预测模型,但很难将这些模型转移到研究区域以外的地区。在尼日尔三角洲盆地,很少开发裂缝压力预测模型。但是,这些模型主要是根据从正常压力间隔获取的泄漏测试数据开发的。基本上,现有的尼日尔三角洲断裂压力预测模型缺乏在超压区间的泄漏测试测量值,因为这些数据不可用。在本文中,提出了一种新的裂缝压力预测模型,该模型可以应用于常压区间和超压带。模型的开发基于使用从分布在整个盆地的各个领域的100多口井获得的几个泄漏测试数据建立裂缝压力,真实垂直深度和超压幅度之间的关系。与以前的模型不同,新开发的模型结合了盆地中超压间隔的泄漏测试测量结果。一般而言,新提出的模型可以高度可信地用于预测整个盆地安全经济的井规划所需的压裂压力。模型的开发基于使用从分布在整个盆地的各个领域的100多口井获得的几个泄漏测试数据建立裂缝压力,真实垂直深度和超压幅度之间的关系。与以前的模型不同,新开发的模型结合了盆地中超压间隔的泄漏测试测量结果。一般而言,新提出的模型可以高度可信地用于预测整个盆地安全经济的井规划所需的压裂压力。模型的开发是基于使用从分布在整个盆地的各个领域的100口以上井获得的几个泄漏测试数据建立裂缝压力,真实垂直深度和超压幅度之间的关系而建立的。与以前的模型不同,新开发的模型结合了盆地中超压间隔的泄漏测试测量结果。一般而言,新提出的模型可以高度可信地用于预测整个盆地安全经济的井规划所需的压裂压力。新开发的模型结合了盆地超压区间的泄漏测试测量结果。一般而言,新提出的模型可以高度可信地用于预测整个盆地安全经济的井规划所需的压裂压力。新开发的模型结合了盆地超压区间的泄漏测试测量结果。一般而言,新提出的模型可以高度可信地用于预测整个盆地安全经济的井规划所需的压裂压力。
更新日期:2020-07-01
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