东濮凹陷基准面变化对砂体发育的控制作用分析  

Control effect analysis of base level changing on sandbody development in Dongpu Depression

作　　者：李继东[1] 许书堂[1] 杨玉娥[1] 顾勤[1] 白钧力[2] 

机构地区：[1]中国石化中原油田分公司勘探开发科学研究院,河南濮阳457001 [2]中国石化集团中原石油勘探局地球物理测井公司,河南濮阳457001

出　　处：《断块油气田》2012年第6期706-709,共4页Fault-Block Oil & Gas Field

基　　金：中国石油天然气集团公司科技攻关项目"东濮凹陷隐蔽油气藏成藏规律及勘探目标研究"(P04092)

摘　　要：通过基准面变化的研究,分析了其对砂体发育的控制作用,认为东濮凹陷沙三段沉积时期基准面变化频繁,变化频率大于1 000次/Ma。这种频繁变化导致沙三段中单砂层厚度较小,砂泥岩频繁互层。东濮凹陷古近系基准面变化旋回具典型"旋回含旋回"的特点,沉积物随基准面的变化不断迁移,在四级层序的高位域和低位域形成富集,四级层序界面对储层有比较明显的控制作用,界面附近砂岩比较发育,而且油气也富集,是油气勘探中要寻找的重点目标。Based on study of base [eve] changing, the control effect of sandbody development is analyzed. It is thought that the base level changes frequently during Es3 Member deposition with changing rate of more than 1,000 times/Ma, which leads tn the thickness thinning of single sand layer in Ess Member and frequent alternatinn of sandstone and mudstone. Paleaogene reserw,ir in Dongpn I）epression has the characteristics of composite base level ehange tryele. Sediments migrate continuously along with base level changing, which accumulate in the high and the low traets iof the fourth sequence. The fimrth sequence intertiiee controls the reservoir obviously. So the sandslones near the inter＇fhee well devehop and the hydrocarbons enrieh, which are the targets for oil gas exploration.

关 键 词：基准面 基准面旋回 层序 层序界面 东濮凹陷 

分 类 号：TE121.3[石油与天然气工程—油气勘探]