随钻方位电磁波界面探测性能分析

doi:10.7623/syxb201607012

石油学报 ›› 2016, Vol. 37 ›› Issue (7): 930-938.DOI: 10.7623/syxb201607012

随钻方位电磁波界面探测性能分析

杨震¹, 杨锦舟¹, 韩来聚², 李翠¹

1. 中国石油化工股份有限公司胜利石油工程公司钻井工艺研究院山东东营 257017;
2. 中国石油化工股份有限公司胜利石油工程公司山东东营 257017

收稿日期:2015-12-04 修回日期:2016-05-05 出版日期:2016-07-25 发布日期:2016-07-28
通讯作者: 杨震,男,1982年3月生,2004年获石油大学(华东)学士学位,2009年获中国石油大学(华东)博士学位,现为中国石油化工股份有限公司胜利石油工程公司钻井工艺研究院高级工程师,主要从事随钻电测井仪器方面的研究。Email:stingsyzh@126.com
基金资助:
国家重大科技专项（2016ZX05021-001）和山东省自然科学基金中青年科学家科研奖励基金项目（BS2015NJ008）资助。

Interface detection performance analysis of azimuthal electromagnetic while drilling

Yang Zhen¹, Yang Jinzhou¹, Han Laiju², Li Cui¹

1. Drilling Technology Research Institute, Sinopec Shengli Petroleum Engineering Corporation, Shandong Dongying 257017, China;
2. Sinopec Shengli Petroleum Engineering Corporation, Shandong Dongying 257017, China

Received:2015-12-04 Revised:2016-05-05 Online:2016-07-25 Published:2016-07-28

摘要/Abstract

摘要：

随钻方位电磁波仪器界面探测性能主要受仪器线圈排布、小信号分辨精度以及地层模型等因素影响。以研发的随钻方位电磁波电阻率（AMR）为例，计算分析了噪声信号对探测能力的影响；在确定仪器结构和电气性能的情况下，重点模拟分析不同地层条件下AMR仪器的界面探测能力以及对薄层的识别和分辨能力。模拟结果表明：反映界面距离的定向信号幅度主要受界面两侧的电导率差影响；地层界面渐变时定向信号幅度小于阶跃模型模拟幅度；各向异性地层模型中，定向信号幅度及界面探测能力主要受水平电阻率的影响。在界面距离反演过程中，噪声信号对远距离界面反演结果有较大影响；合理选取各向同性地层中低阻地层的电阻率以及各向异性地层中的水平电阻率是界面距离预测结果精确与否的关键。

关键词: 方位电磁波, 界面探测, 反演, 各向异性, 探测深度

Abstract:

The detection performance of azimuthal electromagnetic interface while drilling is mainly influenced by the arrangement of instrument coils, small-signal resolution precision, formation models and other factors. Taking the developed azimuthal electromagnetic resistivity while drilling (AMR) as an example, the influences of noise signal on detection ability are calculated and analyzed in this study. When the instrument structure and electrical performance are confirmed, simulations and analyses are mainly performed on the detection ability of AMR interface under different formation conditions as well as the identification and resolution for thin beds. The simulation results show that the directional signal amplitude reflecting interface distance is mainly influenced by conductivity difference on both sides of interface. In case of transitional formation interface, directional signal amplitude is smaller than the simulated amplitude of step model. In anisotropic formation model, directional signal amplitude and interface detection ability are mainly affected by horizontal resistivity. In the inversion process of interface distance, noise signals have a big influence on the inversion results of far-distance interface. Reasonable selection of the resistivity in low-resistivity reservoirs of isotropic formations and horizontal resistivity in anisotropic formations is a key to precisely predict the interface distance.

Key words: azimuthal electromagnetic, interface detection, inversion, anisotropy, detection depth

中图分类号:

TE271

杨震, 杨锦舟, 韩来聚, 李翠. 随钻方位电磁波界面探测性能分析[J]. 石油学报, 2016, 37(7): 930-938.

Yang Zhen, Yang Jinzhou, Han Laiju, Li Cui. Interface detection performance analysis of azimuthal electromagnetic while drilling[J]. Acta Petrolei Sinica, 2016, 37(7): 930-938.

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随钻方位电磁波界面探测性能分析

Interface detection performance analysis of azimuthal electromagnetic while drilling

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