石油与天然气地质 ›› 1996, Vol. 17 ›› Issue (1): 27-31.doi: 10.11743/ogg19960105

• 论文 • 上一篇    下一篇

异常超压带内开启泥岩裂隙的分布与油气初次运移

张金功1, 王定一1, 邸世祥1, 李丕龙2   

  1. 1. 西北大学, 西安 710069;
    2. 胜利石油管理局, 山东东营 257001
  • 收稿日期:1994-07-30 修回日期:1994-12-17 出版日期:1996-03-25 发布日期:2014-01-14

DISTRIBUTION OF OPEN FRACTURES IN ABNORMAL OVERPRESSURE MUDSTONE AND PRIMARY MIGRATION OF HYDROCARBON

Zhang Jingong1, Wang Dingyi1, Di Shixiang1, Li Pilong2   

  1. 1. Northwest University, Xian;
    2. Shengli Petroleum Administration, Dongying, Shandong
  • Received:1994-07-30 Revised:1994-12-17 Online:1996-03-25 Published:2014-01-14

PDF (PC)

729

被引次数

68

摘要：

黄骅坳陷沧东-南皮凹陷下第三系异常超压带内开启泥岩裂隙的分布表明,具有开启状态裂隙的泥岩在垂向上集中分布在一定的深度区间,该带在横向上是区域性分布的。在开启泥岩裂隙带内,泥岩孔隙度、蒙脱石含量、残留总烃/有机碳及等ααα20S/20S+20R C29指标较上下层段有较大幅度的减少。据此认为,异常超压带内泥岩裂隙产生后便进行大规模持续的排液,直至泥岩排液潜力趋于丧失裂隙才会闭合,该过程以一次性为主。开启泥岩裂隙带是油气初次运移的主要地带。

关键词: 异常超压, 开启泥岩裂隙, 油气初次运移

Abstract:

The distribution of open-fracture in Eogene abnormal overpressure mudstone and shaleof Changdong-Nanpi Sag in Huanghua Depression suggests that the mudstone and shale withopen fractures centralized in certain depth interval in vertical, but laterally the overpressurezone is regionally distributed. The porosity,the content of ascanite, the residual total hydrocarbons/total organic carbon (TH/TOC) and ααα20S/20S+20R C29 of the mudstone and shale decrease more than that of the upper and lower beds. It thus proved that so long as the openfractures form,a large scale of continuous fluid expulsion would start and the fractures wouldnot close until the expulsion potential exhaust. According to the distribution of the open fractures,the main zone of oil and gas migration could be determined.