China Petroleum Exploration ›› 2018, Vol. 23 ›› Issue (6): 113-118.DOI: 10.3969/j.issn.1672-7703.2018.06.013

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Application of pulse neutron full spectrum logging in Dawangzhuang oilfield

Liu Ping1, Gao Zhentao1, Li Xiaojiao1, Ma Xiaojing1, Yue Wei2, Liu Yuhan3, Ma Biao4, Ding Ruixia1   

  1. 1 Research Institute of Exploration and Development, PetroChina Huabei Oilfield Company;
    2 Underground Gas Storage Management Agency, PetroChina Huabei Oilfield Company;
    3 Graduate School of Petroleum Engineering College, Yangtze University;
    4 The First Oil Production Plant, PetroChina Huabei Oilfield Company
  • Received:2018-01-07 Revised:2018-09-10 Online:2018-11-15 Published:2018-11-13
  • Supported by:
     

Abstract: Dawangzhuang oilfield is in the late stage of development, so it is very important to find out the distribution of remaining oil. Saturation logging method alone can't meet the requirements of fine interpretation and evaluation. Pulsed neutron full spectrum saturation logging, integrating C/O spectrum, chlorine spectrum, neutron lifetime and oxygen activation logging technology, can record several logging curves in one trip and identify water-flooded zones accurately under low salinity and high shale content. The principle, technical characteristics and data interpretation principle of pulsed neutron full spectrum saturation logging are introduced, and the full spectrum saturation logging data are creatively combined with conventional logging data, the intersection interpretation chart of different layers in Dawangzhuang oilfield is compiled, and the new interpretation standard is set to significantly improve the coincidence rate of full spectrum logging interpretation. The interpretation results can reflect the variation of remaining oil saturation in reservoir accurately, providing reliable basis for identifying watered-out zones, searching potential zones and figuring out the distribution law of remaining oil. It will be a handy and reliable tool in tapping remaining oil and increasing oil reserves.

 

Key words: full spectrum logging, remaining oil, saturation, C/O, water flooded layer

CLC Number: