| 珠江口盆地珠一坳陷古近系优质储层差异发育特征及主控因素——以陆丰地区和惠州地区文昌组为例 |
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| 引用本文： | 丁琳,李晓艳,周凤娟,龙更生,马永坤,张月霞.珠江口盆地珠一坳陷古近系优质储层差异发育特征及主控因素——以陆丰地区和惠州地区文昌组为例[J].岩石矿物学杂志,2022,41(1):75-86. |
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| 作者姓名： | 丁琳 李晓艳 周凤娟 龙更生 马永坤 张月霞 |
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| 作者单位： | 中海石油（中国）有限公司深圳分公司 |
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| 基金项目： | 中海石油(中国)有限公司科技联合攻关项目(YXKY-2019-SZLH-01)。 |
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| 摘 要： | 近年来珠江口盆地古近系深层勘探屡获突破,经济下限也逐渐下调至埋深4 000多米,勘探实践证明,陆丰-惠州地区古近系储层表现出明显的差异性,陆丰地区古近系储层普遍优于惠州地区。为解析这两个地区古近系储层的差异,本文利用岩石薄片、扫描电镜、X衍射、物性等分析化验资料,开展了陆丰、惠州地区古近系储层研究,根据成岩过程中岩石的溶蚀特征及溶蚀产物对其进行分类,建立其与储层物性之间的对应关系,进而还原不同类型储层的孔隙演化过程及控制因素。研究结果显示,陆丰地区文昌组储层受中生代沉积岩物源影响明显,岩石组分具高石英、低长石组分特征,孔隙类型以原生孔为主,具有弱溶蚀-少产物的成岩组合,发育低孔中渗或中高孔中高渗储层;惠州地区文昌组受中生代花岗岩物源影响明显,岩石组分具低石英、高长石组分特征,孔隙类型以原生孔、溶蚀孔和高岭石晶间微孔等混合孔为主,具有强溶蚀-多产物的成岩组合,普遍发育中孔低渗储层,但受强水动力改造下也能形成中孔中渗优质储层。对陆丰与惠州地区古近系优质储层的对比分析认为,母岩性质决定储层的先天优势,沉积改造改善储层初始物性,成岩差异影响储层质量的好坏。厘清不同母岩影响下优质储层发育条件及形...
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| 关 键 词： | 珠江口盆地 古近系 母岩性质 成岩差异 优质储层 主控因素 |
| 收稿时间： | 2021/5/13 0:00:00 |
Differential development characteristics and main controlling factors of the Paleogene high-quality reservoirs from the ZhuⅠDepression in the Pearl River Mouth Basin:A case on Wenchang Formation at Lufeng area and Huizhou area |
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| DING Lin,LI Xiao-yan,ZHOU Feng-juan,LONG Geng-sheng,MA Yong-kun,ZHANG Yue-xia.Differential development characteristics and main controlling factors of the Paleogene high-quality reservoirs from the ZhuⅠDepression in the Pearl River Mouth Basin:A case on Wenchang Formation at Lufeng area and Huizhou area[J].Acta Petrologica Et Mineralogica,2022,41(1):75-86. |
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| Authors: | DING Lin LI Xiao-yan ZHOU Feng-juan LONG Geng-sheng MA Yong-kun ZHANG Yue-xia |
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| Institution: | (Shenzhen Branch of CNOOC China Limited,Guangdong Shenzhen 518067,China) |
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| Abstract: | In recent years,the Paleogene deep exploration of Pearl River Mouth Basin has gained repeated breakthroughs,and the economic basement has been gradually lowered to more than 4000 meters.Exploration practices show that Paleogene reservoirs of Lufeng area and Huizhou area display significant diversity and that the Paleogene reservoir in Lufeng area is better than in Huizhou area.To clarify the difference of the Paleogene reservoir between these two areas,the diagenesis of reservoir is studied by using thin section,scanning electron microscope,X-ray diffraction and physical properties analysis.According to the dissolution characteristics and dissolution products of rocks in the secondary pore development zone,the corresponding relationship between them and reservoir physical properties is established and then the pore evolution models of different types of reservoirs are restored.The research reveals that Wenchang Formation sandstone in Lufeng area,which is obviously influenced by Mesozoic sedimentary rocks,is characterized by high contents of quartz and low contents of feldspar,and mainly primary pores of pore types,develops low porosity and medium permeability or medium-high porosity and medium-high permeability reservoirs.Wenchang Formation sandstone in Huizhou area,which is obviously influenced by Mesozoic granite sources,is characterized by low contents of quartz and high contents of feldspar,mixed pores of primary pores and dissolution pores of pore types,develops medium porosity and low permeability reservoirs which could be changed into medium porosity and medium permeability reservoir refer to strong hydrodynamic force.Comprehensive study shows that the nature of parent rock determines the inherent advantages of reservoir,and that sedimentary rebuild improves the original physical property of reservoir,diagenesis difference affects the quality of reservoir.Understanding the development conditions and formation mechanism of high-quality reservoirs is of great significance for the Paleogene reservoir dessert prediction in different areas. |
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| Keywords: | Pearl River Mouth Basin Paleogene parent rock types diagenetic difference high-quality reservoirs main controlling factors |
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