PNN测井在剩余油评价中的应用——以老区油田高台子油层为例

doi:10.11720/wtyht.2024.1075

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Abstract

As mature oilfields are in their middle to late exploitation stage, the Gaotaizi oil layer exhibits significantly increased water saturation, elusive longitudinal stratification, and unknown distribution patterns of regional residual oil. These complicate the potential exploitation, energy conservation, and emission reduction. To ascertain the distribution of residual oil in the Gaotaizi oil layer in order to guide production operations and clarify potential targets, this study identified the longitudinal distribution of residual oil in the study area using the pulsed neutron-neutron (PNN) logging technique. The comparison between the monitoring results and production data of 10 wells revealed a coincidence rate of measures of 80%. The results of this study show that the PNN logging technique can be used to effectively identify the longitudinal distribution of residual oil in reservoirs and yields encouraging application performance in guiding the hole filling and water plugging for single wells in high-water-cut layers, thus increasing oil production. This technique has increased the evaluation accuracy of residual oil saturation in the Gaotaizi oil layer in the mature oilfield. It can provide technical support for formulating and adjusting subsequent oilfield exploitation schemes and offer a scientific basis for further guiding efficient reservoir exploitation, energy conservation, and emission reduction.

Key words： PNN logging Gaotaizi oil layer residual oil saturation oilfield exploitation

Received: 22 February 2023 Published: 16 April 2024

ZTFLH:

P631

Corresponding Authors: QIN Zhen E-mail: 1031420203@qq.com;442105079@qq.com

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	Articles by authors
	Ke-Jia SU
	Zhen QIN
	Min FENG
	Han-Bing AI
	Gang WANG
	Hua-Ling GUAN
	Yu FU

Cite this article:

Ke-Jia SU,Zhen QIN,Min FENG, et al. Application of PNN logging in residual oil evaluation: A case study of the Gaotaizi oil layer in mature oilfields[J]. Geophysical and Geochemical Exploration, 2024, 48(2): 393-402.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2024.1075 OR https://www.wutanyuhuatan.com/EN/Y2024/V48/I2/393

PNN logging technical indicators

PNN logging deployment distribution map

Interpretation results of PNN logging in well A

Results of TNIS logging

Distribution of oil saturation in Gaotaizi, old district

PNN logging interpretation results

A well downhole video image

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