大民屯凹陷再认识与重点勘探目标评价

Knowing Damintun Sag again and evaluation of Key exploration object.

应用层序地层学方法,建立大民屯凹陷层序地层格架,将沙河街组划分为两个二级层序、六个三级层序。在断裂构造解释的基础上,深、浅层统一划分为7个二级构造带。分别对凹陷中的潜山区带、西部斜坡带沙四段、沙三段下部轴向三角洲和荣胜堡中部气烟囟构造带复式油气聚集带进行目标优选与评价。建议实施马三家子二次三维和荣胜堡洼陷南三维地震勘探;开展大民屯凹陷东南部与东部凹陷茨榆坨北部地震资料连片处理;开展复杂构造带叠前深度偏移处理攻关,提高西部逆冲走滑断裂带成像精度。

Using sequence-stratigraphic method to build up sequence-stratigraphic framework of Damintun sag,the Es Formation is divided into two Ⅱ stratigraphic orders and six Ⅲ stratigraphic orders.On the basis of faulted structural interpretation,the shallow and deep strata are partitioned into seven Ⅱ structural belts.The objective optimization and evaluation are carried out for buried hill zone,Es4 in western slope,axial delta in lower part of Es3 and composite oil/gas accumulation zone in gas-chimney structural b...