摘要
大安寨一亚段储渗体主要发育在碳酸盐岩浅湖中的高能介屑滩灰岩中。高能介屑滩灰岩是形成储渗体的物质基础 ,重结晶作用和溶蚀作用使岩石变松、变脆和易于破裂 ,发育溶孔、洞、缝 ;两次大的挤压应力作用 ,产生两组共扼剪切构造裂缝 ,在构造高部位和构造变异部位会沿这些剪切裂缝产生重张缝和追踪张裂缝 ,极大的改善了储集性能 ;断裂是储渗体中油气运移的重要通道。强振幅、高波阻抗是识别厚层、质纯灰岩的重要标志 ;高突变系数对储渗体孔洞缝的发育特别敏感 ,是识别储渗层的重要参数。在此基础上运用多参数综合判别法对川北柏垭地区大安寨一亚段储渗体进行了分布预测 。
Da'anzai 1 submember reservoir body developed in high energy shelly limestone of shallow lake carbonate facies.Recrystallization and dissolution made the shelly limestone loose and easy to be break.Solution pores,cavities and fissures developed well in it.Two compressional movements resulted in two sets of conjugate shear fractures,and also formed retensional fissures and extensional fissures on the higher part and mutation part of the structure along the shear fractures.This thus considerably improved reservoir's physical property.It has been proved that intense amplitude and high wave impedance are important evidences for the identification of thick limestone;high mutation factor is an important parameter for distingushing porous reservoirs.This method was used to predict the distribution of porous reservoir in Da'anzai 1 submember in Baiya region of North Sichuan,the result has been proved by well drilling.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2002年第1期81-83,共3页
Oil & Gas Geology
基金
中国石化新星公司科技项目"川北阆中 -南部地区千佛崖组
大安寨段油气富集带预测及勘探目标选择"科研成果部分内容
关键词
大安寨段
储渗体
主控因素
识别
油气分布
特征
Da'anzai member,reservoir body
controlling factor
identification
distribution prediction
