物探与化探2024，Vol.48Issue(3)：573-583,11.DOI:10.11720/wtyht.2024.1164
低对比度油层测录井综合识别方法研究与应用
Research and application of the log-based comprehensive identification method for low-contrast oil layers:A case study of the Lufeng oilfield in the Pearl River Mouth Basin
摘要
Abstract
The accurate identification of fluid properties is critical for reservoir evaluation.However,for the Paleogene low-porosity and low-permeability reservoirs in the Lufeng area,Pearl River Mouth Basin,the low contrast between oil and water layers in conventional logs due to the presence of high-resistivity water layers complicates the identification of oil and water layers.This study first ascertained the reservoir characteristics and genetic analysis of low-contrast oil layers.Then,it developed the Flair gas logging response equation and the Flair logging response correction method,aiming to overcome the challenge that gas logging response values of low-porosity and low-permeability reservoirs are significantly influenced by factors such as drilling rate and porosity.Given the differences in the properties and components of various fluids,this study constructed new oil-bearing and water-content indices using Flair gas logging curves.Moreo-ver,this study characterized the geochemical chromatogram using a gamma probability distribution function and extracted the shape and scale factors to describe the chromatogram characteristics.Based on sensitivity parameters,this study plotted the characteristic parame-ter-based fluid property identification chart.The practical application shows that the log-based comprehensive fluid property identifica-tion method can yield satisfactory effects,achieving a compliance rate of 91.3%.Therefore,this method can be popularized.关键词
低对比度油层/残余油/Flair录井校正/地化色谱图谱/伽马分布/流体识别Key words
low-contrast oil layer/residual oil/Flair log correction/geochemical chromatogram/gamma distribution/fluid identification分类
天文与地球科学引用本文复制引用
刘伟男,管耀,刘道理,石磊,宋伟..低对比度油层测录井综合识别方法研究与应用[J].物探与化探,2024,48(3):573-583,11.基金项目
中国海洋石油有限公司"十四五"重大科技项目"海上深层/超深层油气勘探技术"(KJGG2022-0406) （KJGG2022-0406）
中海石油(中国)有限公司深圳分公司生产性科研项目(SCKY-2024-SZ-14) （中国）
