开鲁盆地陆东凹陷碎屑岩成藏规律  

Accumulation Regularity of Clastic Rocks in Ludong Sag of Kailu Basin

作　　者：张瑞雪[1] Zhang Ruixue(PetroChina Liaohe Oilfield Company,Panjin,Liaoning 124010,China)

机构地区：[1]中国石油辽河油田分公司,辽宁盘锦124010

出　　处：《特种油气藏》2022年第5期66-71,共6页Special Oil & Gas Reservoirs

基　　金：中国石油重大科技专项“辽河油田千万吨稳产关键技术研究与应用”(2017E-1601)。

摘　　要：针对开鲁盆地陆东凹陷碎屑岩储层油藏富集规律认识不清的问题,在精细构造解释的基础上,通过开展沉积演化、储层特征及孔隙演化研究,探讨了碎屑岩成藏规律。结果表明:断陷盆地的不均衡发育,使得油气大多聚集于临近生烃洼陷有利相带内;陆东凹陷碎屑岩储层平均孔隙半径为4.57~9.56μm,平均喉道半径为3.02~8.33μm,整体渗流能力不佳,油气难以长距离运移,具有近源性和准连续性。在碎屑岩沉积、成储、成藏研究基础上,建立了陆东凹陷油气成藏模式。该研究成果为陆东凹陷低渗透油气藏勘探奠定一定的理论基础,对同类油藏的油气勘探具有重要指导意义。In response to the problem of poor understanding of the accumulation law of clastic rock reservoirs in Ludong Sag of Kailu Basin,the accumulation of clastic rock was explored through the study of sedimentary evolution,reservoir characteristics and pore evolution on the basis of fine tectonic interpretation.The result shows:The uneven development of faulted basins makes most of the oil and gas accumulate in favorable facies zones adjacent to hydrocarbon-generating sags;the clastic rock reservoirs in Ludong Sag has an average pore radius of 4.57-9.56μm and average throat radius of 3.02-8.33μm,so it is poor in overall seepage ability,causing difficulties for oil and gas to migrate over long distances,and it is close-sourced and quasi-continuous.Based on the study of clastic sedimentation,reservoir formation and accumulation,the oil and gas accumulation model of Ludong Sag was established.The research results lay a certain theoretical foundation for the exploration of low-permeability oil and gas reservoirs in the Ludong Sag,and have important guiding significance for the oil and gas exploration of similar oil reservoirs.

关 键 词：演化特征 碎屑岩 近源成藏 富集规律 陆东凹陷 开鲁盆地 

分 类 号：TE121[石油与天然气工程—油气勘探]