特种油气藏2024，Vol.31Issue(3)：27-36,10.DOI:10.3969/j.issn.1006-6535.2024.03.004
济阳坳陷桩海地区碎屑岩优质储层特征及成因机制
Characteristics and Genesis Mechanism of High-quality Clastic Reservoirs in Zhuanghai Area of Jiyang Depression
摘要
Abstract
Oil and gas resources are rich in Zhuanghai Area of Jiyang Depression.The proven reserves are high in the Neocene and buried hill strata,while the degree of drilling and understanding of the Paleogen is low,and the characteristics of the Paleogen reservoirs and the genesis mechanism of high-quality reservoirs are poorly under-stood.For this reason,we have studied the petrological characteristics,type of diagenesis,spatial characteristics of clastic reservoirs and the controlling factors of high-quality reservoirs in the Lower Dongying Member-Shahejie For-mation in Zhuanghai Area through the means of analysis such as cores,thin sections,scanning electron microsco-py,etc.The results show that the clastic reservoirs of the Lower Dongying Member-Shahejie Formation in Zhuang-hai Area have a small distribution range and thin thickness,and the reservoirs are dominated by sandstones deposi-ted rapidly near sources with low rock maturity.The compaction is the main reason for destroying the pore space of the reservoirs.The cementation,mainly carbonate cementation,has caused further damage to the pore space.The dissolution of organic acid is an essential factor for forming secondary pore space and increasing pore space in the reservoir.The overall pore type is dominated by secondary pores and primary pores are only retained to a relatively high degree in the reservoirs of the Lower Dongying Member in the northwest source area,and the reservoir fractures are few.The high-quality reservoirs is mainly controlled by three conditions:sedimentary conditions,diagenetic modification,and fracture communication.The glutenite reservoirs are favorable exploration targets with high rock maturity,far from calcium sources,close to acid sources,and fracture communication.This study can provide the geological basis for the exploration and development of the Paleocene system in Zhuanghai Area.关键词
成岩作用/碎屑岩储层质量/储层成因/隐蔽油气藏/桩海地区/济阳坳陷Key words
diagenesis/clastic reservoir quality/reservoir genesis/subtle oil and gas reservoir/Zhuanghai Area/Jiyang Depression分类
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韦敏,于世娜,佟欢,吴彦佳,周红科,史潇潇,郭厚根..济阳坳陷桩海地区碎屑岩优质储层特征及成因机制[J].特种油气藏,2024,31(3):27-36,10.基金项目
中国石化重大科研专项"胜利滩海古近系沉积、成藏规律与目标评价"(P21034-2) （P21034-2）
