L凹陷古近系文昌组储层物性控制因素研究  

Study on Controlling Factors of Reservoir Properties of the Paleogene Wenchang Formation in L Sag

作　　者：余加松 纪友亮[1,2] 刘君龙[1,2] 贾浪波 王茹 

机构地区：[1]油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京),北京102249

出　　处：《特种油气藏》2017年第5期72-77,共6页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金"地质历史时期储层物性参数恢复"(41272157)

摘　　要：运用储层地质学、沉积学理论和方法,利用岩心观察,薄片分析、扫描电镜、X衍射等多种测试手段,在研究古近系文昌组碎屑岩储层基本特征基础上,探讨了低孔、低渗储层条件下优质储层的发育条件。研究表明:沉积作用是储层形成的基本条件,其决定了后期成岩作用类型及成岩强度,成岩作用早期的压实和胶结作用是储层物性变差的主要因素;优质储层主要受控于有机酸溶蚀、早期方解石胶结和构造活动,构造抬升使孔隙得以保存,断层是疏导油气和有机酸的主要通道,寻找有断裂疏导油气和有机酸运移方向及优势相带是该区下一步的勘探方向和突破点。该研究成果对指导研究区下一步勘探有着重要的意义,同时对南海各断陷盆地的油气勘探提供必要的参考和地质依据。By applying the theories and methods of reservoir geology and sedimentology, utilizing several observation methods （core observation, slice analysis, scanning electron microscope and X diffraction etc.） , on the basis of studying the basic elastic reservoir features of the Paleogene Wenchang Formation, we studied the development con- ditions of the fine reservoirs under low-porosity and low-permeability reservoir conditions. The study result indi- cates ： （ 1 ） sedimentary process is the basic condition for forming reservoirs, it determines diagenesis types and dia- genesis strength during later period, and the compaction and cementation during early diagenesis are the major fac- tors for worsening reservoir properties ; （ 2 ） fine reservoirs are mainly controlled by organic acid corrosion, early calcite cementation and tectonic activity; （ 3 ） tectonic uplifting can preserve pores ; （4） faults are the major path- ways for transporting oil, gas and organic acid ; { 5 ） to seek the migration directions of hydrocarbons and organic acid transported by faults and predominant facies belts are the future exploration directions and breakthroughs in this area. This study result is of great significance for guiding future exploration of the study area, and can provide nec- essary reference and geology base for oil and gas exploration in rifted basins in the South China Sea.

关 键 词：低渗透储层 物性控制因素 成岩作用 构造活动 珠江口盆地 珠一坳陷 文昌组 

分 类 号：TE122.2[石油与天然气工程—油气勘探]