|本期目录/Table of Contents|

[1]张恒荣 何胜林 丁 磊 谭 伟 杨 毅.乌石油田流三段含砾砂岩油层低阻成因分析[J].中国海上油气,2020,32(03):69-76.[doi:10.11935/j.issn.1673-1506.2020.03.008]
 ZHANG Hengrong HE Shenglin DING Lei TAN Wei YANG Yi.Genetic analysis on low resistivity oil layers in the pebbled sandstone of the third Member of Liushagang Formation in Wushi oilfield[J].China Offshore Oil and Gas,2020,32(03):69-76.[doi:10.11935/j.issn.1673-1506.2020.03.008]
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乌石油田流三段含砾砂岩油层低阻成因分析()

《中国海上油气》[ISSN:1673-1506/CN:11-5339/TE]

卷:
第32卷
期数:
2020年03期
页码:
69-76
栏目:
油气勘探(南海西部海域勘探成果专辑)
出版日期:
2020-05-25

文章信息/Info

Title:
Genetic analysis on low resistivity oil layers in the pebbled sandstone of the third Member of Liushagang Formation in Wushi oilfield
文章编号:
1673-1506(2020)03-0069-08
作者:
张恒荣 何胜林 丁 磊 谭 伟 杨 毅
(中海石油(中国)有限公司湛江分公司 广东 湛江 524057)
Author(s):
ZHANG Hengrong HE Shenglin DING Lei TAN Wei YANG Yi
(CNOOC China Limited, Zhanjiang Branch, Zhanjiang, Guangdong 524057, China)
关键词:
乌石油田 流三段 含砾砂岩油层 低阻 宏观地质因素 岩石导电与工程因素 储层孔隙结构特征
Keywords:
Wushi oilfield the third Member of Liushagang Formation oil layers in pebbled sandstone low resistivity macroscopic geologic factors rock conductivity and engineering factors reservoir pore texture characteristics
分类号:
TE122.2
DOI:
10.11935/j.issn.1673-1506.2020.03.008
文献标志码:
A
摘要:
北部湾盆地乌石油田流三段含砾砂岩油层电阻率变化复杂,呈现低渗、低阻及低对比度特征。从宏观地质因素、岩石导电与工程因素和储层孔隙结构特征等方面,分析了乌石油田流三段含砾砂岩油层低阻成因,结果表明压实作用和溶解作用的存在会间接导致油层低阻,地层水矿化度差异是导致油层低阻的次要原因; 该区储层伊利石等泥质组分含量较高,且存在填充大孔隙和长石沿节理分布的现象,从而导致微孔隙发育,易形成高束缚水,这是油层低阻的主要成因。因此,黏土矿物架桥于大孔隙导致微孔隙发育是该类储层形成低阻油层的根本原因。本文研究成果对于复杂孔隙结构岩石导电的机理研究与低对比度油藏的勘探开发具有重要的指导意义
Abstract:
In Wushi oilfield of the Beibuwan basin, the oil layers in the pebbled sandstone of the third Member of Liushagang Formation have the characteristics of complex resistivity variation, low permeability, low resistivity and low contrast. The genesis of the low resistivity is analyzed on the aspects of macroscopic geologic factors, rock conductivity, engineering factors and reservoir pore texture, etc. The results demonstrate that the compaction and dissolution could indirectly lead to the low resistivity of oil layers, and the difference of formation water salinity is secondary reason for low resistivity. Main genesis of low resistivity oil layers in this oilfield is the occurrence of micropores that tends to generate high irreducible water saturation due to high mud content(like illite)in the reservoir and the phenomenon of large pore infill and the occurrence of feldspar along joints. Therefore, fundamental genesis of low resistivity oil layers is the occurrence of micropores due to clay mineral bridging in large pores. The research results have important guiding meanings for the exploration and development of low-contrast reservoirs and the mechanism of rock conductivity with complex pore texture

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备注/Memo

备注/Memo:
收稿日期:2020-01-09 改回日期:2020-04-20“十三五”国家科技重大专项“南海西部海域低渗油藏勘探开发关键技术(编号:2016ZX05024-006)”部分研究成果。 第一作者简介: 张恒荣,男,高级工程师,硕士,主要从事测井地质研究工作。地址:广东省湛江市坡头区22号信箱(邮编:524057)。E-mail:zhanghr@cnooc.com.cn。
更新日期/Last Update: 2020-05-30