摘要
利用声波时差资料 ,通过等效深度法研究了乌尔逊凹陷大一段异常孔隙流体压力 ,得到大一段具有 2～ 8MPa的异常孔隙流体压力 ,高值区位于乌 1 5井、乌 1 7井和海参 1井之间 ,由此向凹陷四周逐渐减小。大一段由于异常孔隙流体压力的存在 ,使其毛细管封闭能力增强 ,对扩散相天然气可形成较强的抑制浓度封闭作用 ,使其内断层在垂向上具封闭性 ,这是造成其下油气聚集与保存数量在乌尔逊凹陷最多的一个重要原因。
Using data of interval transit time,this paper studied the abnormal pore fluid pressure of K 1d 1 by the method of equivalent depth,considered K 1d 1 to have 2～8 MPa abnormal pore fluid pressure,high value area in among wu 15 well,wu 17 well and haican 1 well,from it to side of depression abnormal pore fluid pressure of K 1d 1 decreases gradually.Owing to existence of abnormal pore fluid pressure in K 1d 1,it made capillary seal ability increase,formed restraining concentration seal ability to gas in diffusion phase,made faults from vertical seal.This is the important cause that oil and gas accumulated under K 1d 1 is more than that under other strata.
出处
《断块油气田》
CAS
2004年第2期4-6,25,共4页
Fault-Block Oil & Gas Field
