Identification Method for Shallow Gas Layers in Cased Well

Abstract:

In this paper, based on log response in gas formation, effective identification curves for shallow gas reservoirs are preferred from casedhole compensated neutron log, neutron lifetime log and openhole logs, and 4 parameters and 5 overlap curves are developed for identification of shallow gas reservoirs in cased wells. A gas reservoir in cased wells is interpreted with proposed identification methods. The gas production testing results shows that the proposed methods can determine shallow gas reservoirs in cased wells accurately.

• Periodical: Applied Mechanics and Materials (Volume 508)
• Pages: 146-149
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.508.146
• Online since: January 2014
• Authors: Xiao Min Tang*, Xin Deng, Jian Fu, Lin Hou
• Keywords: Cased Hole, Compensated Neutron Logging, Curves Overlap Method, Neutron Lifetime Logging, Parameter Identification Method, Shallow Gas Reservoir

References

[1] Song Yanjie, Bai Xinhua, Xiao Zhanshan, et al. Identification of gas bearing zones and its indication of dynamic production with repeated NGR logs. Journal of daing petroleum institute Vol. 26 (2002), p.1.

[2] Zheng Leiqing. Identification methods for shallow gas formation in shanle region tuha basin. Tuha oil & gas Vol. 9 (2004), p.17.

[3] Xia Zhujun, Xue Mingxia, Wang Aihua, et al. Technique for remained gas logging in gased holes and its application. Journal of oil and gas technology Vol. 27 (2005), p.342.

[4] Min Zhongshun. Application of magnetic release in shallow gas potential tapping. Special oil and gas reservoirs Vol. 13 (2006), p.26.

[5] Xiao Liang, Chu Yulin, Zhang Hongsheng, et al. A study of identifying natural gas using logging data. Chinese journal of engineering geophysics Vol. 3 (2006), p.470.

[6] Xiao liang. The applications of logging data in gas identifying. Xinjiang oil & gas Vol. 3 (2007), p.12.

[7] Huang Daowu, Song Chunhua, Shen Xiaohong, et al. A method of pulse neutron capture logging to calculate gas saturation in low salinity formations and its application. China offshore oil and gas Vol. 19 (2008), p.169.

[8] Zhao Junfeng, Ji Youliang, Chen Hanlin, et al. Research of identifying and evaluating low-porosity and low permeability gas-layers in well-logging. Offshore oil Vol. 28 (2008), p.96.

[9] Xu Fengguang, Liang Lianxi, Chen Ming, et al. Research on the methods and application of the fluid identification in Pinghu oil & gas fields. Offshore oil Vol. 29 (2008), p.94.

[10] Zhang Qi. Application of three-porosity overlay method and its difference value method in gas horizon identification of yongzhujie gas field in baoshan basin. Journal of oil and gas technology Vol. 32 (2010), p.90.

[11] Xie Jinzhuang, Yang Jinghai, Song Yanjie. A fine evaluation method of shallow gas logging cased hole without open hole logging data. Natural gas geoscience Vol. 23(2012), p.1140.

[12] Wu Shulin, Chen Xuejiao, Chwnmei, et al. A study of tight sandstone gas identification technology. Chinese journal of engineering geophysics Vol. 10 (2013), p.205.