Numerical analysis of the effects of downhole dynamic conditions on formation testing while drilling
Numerical analysis of the effects of downhole dynamic conditions on formation testing while drilling
复制标题
井下动态条件对随钻地层测试影响的数值分析
DOI：
10.1007/s12182-014-0353-2
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发表时间：
2014-07
影响因子：
5.6
通讯作者：
Jiming Sun
中科院分区：
文献类型：
--
作者：
Guo Tao;Bing Wang;Xu Chen;Jiming Sun
随钻地层测试是一种创新技术，它正在取代传统的压力测试，在传统的压力测试中，在钻井后的相对较短的时间内进行流体取样。此时泥浆侵入刚刚开始，泥饼尚未完全形成，地层压力不稳定。因此，研究井下动态环境对压力测试和流体取样的影响具有重要意义。应用油水两相有限元模型，研究了泥饼质量和泥浆滤液侵入对不同渗透率储层的增压、预测试和取样的影响。但该研究仅针对水基钻井液的情况。结果表明，泥饼质量对增压压力和流体取样有显著影响，而泥浆滤液侵入程度对试压和取样有较大影响。此外，在低渗透储层中，由于泥浆滤液侵入更深，现场地层压力测试更困难，因此降低了流体取样的质量。最后，从阿拉斯加北坡油田的一个现场实例，以验证井下动态条件的影响，随钻地层测试的数值研究。
Formation testing while drilling is an innovative technique that is replacing conventional pressure testing in which the fluid sampling is conducted in a relatively short time following the drilling. At this time, mud invasion has just started, mudcake has not formed entirely and the formation pressure is not stable. Therefore, it is important to study the influence of the downhole dynamic environment on pressure testing and fluid sampling. This paper applies an oil-water two phase finite element model to study the influence of mudcake quality and mud filtrate invasion on supercharge pressure, pretest and sampling in the reservoirs of different permeability. However, the study is only for the cases with water based mud in the wellbore. The results illustrate that the mudcake quality has a significant influence on the supercharge pressure and fluid sampling, while the level of mud filtrate invasion has a strong impact on pressure testing and sampling. In addition, in-situ formation pressure testing is more difficult in low permeability reservoirs as the mud filtrate invasion is deeper and therefore degrades the quality of fluid sampling. Finally, a field example from an oil field on the Alaskan North Slope is presented to validate the numerical studies of the effects of downhole dynamic conditions on formation testing while drilling.
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DOI：
10.2118/96719-ms
发表时间：
2005
期刊：
--
影响因子：
--
作者：
J. Finneran;Clive P Green;Haavard Roed;C. Siess;Ian Mitchell;M. Proett
通讯作者：
J. Finneran;Clive P Green;Haavard Roed;C. Siess;Ian Mitchell;M. Proett
DOI：
10.2118/84087-ms
发表时间：
2003
期刊：
--
影响因子：
--
作者：
M. Proett;M. L. Walker;David Welshans;C. Gray
通讯作者：
M. Proett;M. L. Walker;David Welshans;C. Gray
DOI：
--
发表时间：
2010-06
期刊：
--
影响因子：
--
作者：
M. Proett;David Welshans;Kristopher V. Sherrill;Jim R. Wilson;J. House;R. Shokeir;Tommy Solbakk
通讯作者：
M. Proett;David Welshans;Kristopher V. Sherrill;Jim R. Wilson;J. House;R. Shokeir;Tommy Solbakk
DOI：
--
发表时间：
2009
期刊：
Well Logging Technology
影响因子：
--
作者：
Zhang Xu-jian
通讯作者：
Zhang Xu-jian
埋地电介质矢量电磁散射建模的快速算法
DOI：
10.1002/cjg2.644
发表时间：
2005
期刊：
Chinese J. Geophysics. (Acta Geophysica Sinica)
影响因子：
--
作者：
Xu Liming;Nie Zaiping
通讯作者：
Nie Zaiping