Quantitative analysis of tight sandstone reservoir heterogeneity based on rescaled range analysis and empirical mode decomposition: A case study of the Chang 7 reservoir in the Dingbian oilfield

Zikang Xiao, Wenlong Ding, Shiyan Hao, Arash Dahi Taleghani, X. Wang, Xuehui Zhou, Yaxiong Sun, Jingshou Liu, Yang Gu

Research output: Contribution to journalArticle

Abstract

Of the characteristics of tight sandstone reservoirs, heterogeneity is one of the most difficult characteristics to analyze. Heterogeneity is mainly manifested in three properties: lithology, porosity and electricity. The Chang 7 reservoir in the Dingbian oilfield is a tight sandstone reservoir controlled by delta front deposits. In this sedimentary environment, the underwater distributary channel oscillates frequently, resulting in considerable heterogeneity of the Chang 7 formation in the study area. The rescaled range method can calculate the fractal dimension D of logging curves, thus quantitatively characterizing reservoir heterogeneity. After analyzing the relationship between average wave number and IMF number by EMD method, the reservoir heterogeneity can be quantitatively characterized by ρ value. By comparing D value, ρ value and F value of different heterogeneous types, it is found that F value can distinguish different heterogeneous types. The order of F value also satisfies the actual situation of formation heterogeneity. The new heterogeneity coefficient is used to study the heterogeneity of Chang 7 reservoir, it is found that the relationship between the lithological heterogeneity represented by the natural gamma (GR) log and oil production is a quadratic function that initially increases and then decreases, that the relationship between the pore heterogeneity represented by the interval transit time (AC) log and oil production is linear, and that the relationship between the reservoir electrical heterogeneity represented by the deep induction log (LLD) and oil production is linear too.

Original languageEnglish (US)
Article number106326
JournalJournal of Petroleum Science and Engineering
Volume182
DOIs
StatePublished - Nov 1 2019

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Sandstone
quantitative analysis
sandstone
decomposition
Decomposition
Chemical analysis
Lithology
Fractal dimension
Deposits
Electricity
oil production
Porosity
Oils
analysis
IMF
electricity
lithology
porosity

All Science Journal Classification (ASJC) codes

  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology

Cite this

@article{c21367ada15742448a185ccbeea814c1,
title = "Quantitative analysis of tight sandstone reservoir heterogeneity based on rescaled range analysis and empirical mode decomposition: A case study of the Chang 7 reservoir in the Dingbian oilfield",
abstract = "Of the characteristics of tight sandstone reservoirs, heterogeneity is one of the most difficult characteristics to analyze. Heterogeneity is mainly manifested in three properties: lithology, porosity and electricity. The Chang 7 reservoir in the Dingbian oilfield is a tight sandstone reservoir controlled by delta front deposits. In this sedimentary environment, the underwater distributary channel oscillates frequently, resulting in considerable heterogeneity of the Chang 7 formation in the study area. The rescaled range method can calculate the fractal dimension D of logging curves, thus quantitatively characterizing reservoir heterogeneity. After analyzing the relationship between average wave number and IMF number by EMD method, the reservoir heterogeneity can be quantitatively characterized by ρ value. By comparing D value, ρ value and F value of different heterogeneous types, it is found that F value can distinguish different heterogeneous types. The order of F value also satisfies the actual situation of formation heterogeneity. The new heterogeneity coefficient is used to study the heterogeneity of Chang 7 reservoir, it is found that the relationship between the lithological heterogeneity represented by the natural gamma (GR) log and oil production is a quadratic function that initially increases and then decreases, that the relationship between the pore heterogeneity represented by the interval transit time (AC) log and oil production is linear, and that the relationship between the reservoir electrical heterogeneity represented by the deep induction log (LLD) and oil production is linear too.",
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Quantitative analysis of tight sandstone reservoir heterogeneity based on rescaled range analysis and empirical mode decomposition : A case study of the Chang 7 reservoir in the Dingbian oilfield. / Xiao, Zikang; Ding, Wenlong; Hao, Shiyan; Dahi Taleghani, Arash; Wang, X.; Zhou, Xuehui; Sun, Yaxiong; Liu, Jingshou; Gu, Yang.

In: Journal of Petroleum Science and Engineering, Vol. 182, 106326, 01.11.2019.

Research output: Contribution to journalArticle

TY - JOUR

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T2 - A case study of the Chang 7 reservoir in the Dingbian oilfield

AU - Xiao, Zikang

AU - Ding, Wenlong

AU - Hao, Shiyan

AU - Dahi Taleghani, Arash

AU - Wang, X.

AU - Zhou, Xuehui

AU - Sun, Yaxiong

AU - Liu, Jingshou

AU - Gu, Yang

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