摘要
运用Basin2盆地模拟软件对大民屯凹陷进行了压力场演化模拟,结果表明,超压在本区比较普遍,超压在垂向上有一定延续性、持续深度大,横向上规律性不强,断层对超压的积累与释放起着重要的控制作用。与运用等效深度法得出的现今剩余压力展布对比可知,两者吻合较好,证明Basin2模拟结果比较可靠,即本区超压演化总体上符合“无—陡增—平缓上升—最高—下降—最低”这一规律,这与该区盆地沉降过程相一致。超压对油气生、运、聚影响显著,根据不同层位超压展布特征可判断大民屯凹陷E3s1末期、东营组为含烃流体主要运移期,剩余压力低值区的有利圈闭应为有利成藏区,是今后勘探的重要区域。
The pressure field evolution in Damintun Sag is modeled with Basin-2 simulator. The result indicates that overpressure prevalently occurs in this area, which is characterized by vertical extension and deep expansion, and faults are important to control the accumulation and release of overpressure. The result is consistent with remaining pressure distribution of equivalent depth method, which proves the reliability of the modeling result by using Basin-2 simulator. The evolution of overpressure is generally followed by such rule of overpressure changes as zero, steeply growing, gently increasing, up to the top, declining and the lowest, which is well matched with the depressed process of this area. It is indicated that the overpressure greatly affects the generation, migration and accumulation of hydrocarbons in it. In view of the distribution characteristics of overpressure in different strata, it is suggested that Late E3s1 and Dongying formation are the main hydrocarbon migration period and the traps in low-value area of residual pressure are favorable petroleum accumulation areas to be regarded as important domains for oil-gas exploration.
出处
《新疆石油地质》
CAS
CSCD
2004年第3期270-273,共4页
Xinjiang Petroleum Geology
基金
国家杰出青年科学基金项目
沉积盆地超压系统演化及其成藏效应(编号:40125008)
关键词
模拟技术
压力场
演化
辽河盆地
Liaohe basin
Damintun sag
pressure distribution
modeling
evolution
