知识与财富的链接
济阳坳陷沾化地区发育网格状断裂,油气分布复杂。通过分析区域应力场和断层活动性,探讨了沾化地区断裂特征及其对成藏要素和油气分布的控制作用。结果表明,受郯庐断裂带不同时期走滑作用影响,沾化地区先后发育早期北西向和晚期北东向、(近)东西向3组断裂,断裂叠加呈网格状分布。早期北西向的罗西、孤西和五号桩3条逆冲断层,控制形成了罗西、垦利—埕东和垦东—埕岛3条北西向的潜山披覆构造带,并与晚期北东向和(近)东西向断裂叠加,形成了沾化地区多位序潜山披覆构造并存的构造格局。研究区北西向断裂自西向东依次消亡,北东向和(近)东西向断裂自南向北具有"琴键式"迁移规律,含油层系自西向东、自南向北具有依次增多的规律;同一构造带上,不同位序潜山披覆构造控制了油气的富集层段。
There are grid-like faults and complex hydrocarbon distributed in Zhanhua depression.By means of comprehensively study on the stress field and the fault activity,structural evolution and the main control factors of oil and gas distribution are analyzed in Zhanhua depression.It is demonstrated that,influenced by the strike-slip movement of Tan-Lu faults,the north-west faults are early initiated,while the north-east faults and east-west faults are thereafter created,therefore,they are superposed grid of faults.It is considered that,influenced by the superposition effect of the three north-east faults,north-east faults and eastwest faults,the buried hill draping structures with different sequences are triggered in Zhanhua depression.The characteristics of oil zones,increasing from south to north and from west to east,are determined by the conditions of the north-west faults that are more active gradually from west to east,but it stops thereafter early,the north-east faults and east-west faults are more active gradually from south to north.The pay zones of hydrocarbon are controlled by buried hill order in the same structural belt.
