石油与天然气地质 ›› 2012, Vol. 33 ›› Issue (5): 675-685,694.doi: 10.11743/ogg20120503

• 油气地质 • 上一篇    下一篇

东营凹陷博兴洼陷石油生成、运移和聚集史数值模拟

王冰洁1, 罗胜元1, 陈艳红2, 吴旺林3   

  1. 1. 中国地质大学 构造与油气资源教育部重点实验室, 湖北 武汉 430074;
    2. 中国石油 新疆油田分公司 采油二厂, 新疆 克拉玛依 834008;
    3. 中国石油 华北油田公司 二连分公司, 内蒙古 锡林浩特 026000
  • 收稿日期:2011-08-15 修回日期:2012-06-10 出版日期:2012-10-28 发布日期:2012-11-15
  • 第一作者简介:王冰洁(1984-),男,博士,储层预测和油气成藏模拟。
  • 基金项目:

    构造与油气资源教育部重点实验室基金项目(TPR-2010-10)。

Numerical simulation of hydrocarbon generation,migration and accumulation in the Boxing sag,Dongying Depression, Jiyang Subbasin

Wang Bingjie1, Luo Shengyuan1, Chen Yanhong2, Wu Wanglin3   

  1. 1. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan, Hubei 430074, China;
    2. No.2 Oil Production Plant, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834008, China;
    3. Erlian Subsidiary Company, Petrochina Huabei Oilfield Company, Xilinhaote, Inner Mongolia 026000, China
  • Received:2011-08-15 Revised:2012-06-10 Online:2012-10-28 Published:2012-11-15

摘要:

渤海湾盆地东营凹陷博兴洼陷烃源岩为沙河街组三段中、下亚段和沙河街组四段上亚段暗色泥岩,原油探明地质储量主要集中在沙三段和沙四段砂岩储层中。在恢复东营凹陷博兴洼陷热史的基础上,对烃源岩段成熟史、生排烃史和油气聚集史特征进行了模拟。结果表明:①至少存在两期原油的生、排烃过程,第一期为30~25Ma,第二期为16~0Ma,特别是距今5Ma(馆陶组沉积末期)以来,石油大量生成并排出形成现今的油气分布格局,而现今主力烃源岩段仍处于大量生油阶段;②沙四段原油的生成量和聚集量都明显大于沙三段,说明主力烃源岩段的生、排烃特征对原油纵向分布具有一定控制作用;③在沙三中、下亚段和沙四上亚段共划出7个距离源区较近的有利油气聚集区,而缓坡带虽处于油气低势区,有利于油气的聚集,但烃源岩成熟度低,并且来自于洼陷区的原油受博兴断裂带阻隔,导致博兴缓坡带油气聚集量小。

关键词: 数值模拟, 石油生-运-聚史, 沙河街组, 东营凹陷, 济阳坳陷

Abstract:

The dark shale rich in organic matter in the middle and lower parts of Member 3(Es3)and the upper part of Member 4(Es4)of the Shahejie Formation are the source rocks in the Boxing sag of the Dongying depression.The measured geologic reserves are mainly discovered in the sandstones of the Es3 and Es4.Based on a reconstruction of thermal history of the sag,the researchers simulated the source rock thermal maturation history and hydrocarbon generation,migration and accumulation histories.The findings are listed as the following:①There are at least two periods of hydrocarbon generation and expulsion with the first period lasting from 30Ma to 25Ma and the second ranging from 16Ma to 0Ma.of the second period,the most important time is from 5Ma(the end of deposition of the Guantao Formation)to the present,during which large amount of oil were generated and distributed the way we see today,and the major source rocks are supposed to be still generating oil at pre-sent;②The amount of oil generated and accumulated in the Es4 member is significantly bigger than those in the Es3 member,indicating the hydrocarbon generation and expulsion process of the main source rocks controlled the vertical crude oil distribution to a certain extent.③Seven favorable oil plays are identified near the main source rocks according to the simulation.Although the gentle slope in the Boxing sag is located in the lower oil-potential area and is favorable for oil migration and accumulation,the maturity of source rocks at the slope area is low and the oil migration from the lower area is blocked by the Boxing fault zone,resulting in the relatively small amount of oil accumulated in the slope.

Key words: numerical simulation, history of hydrocarbon generation, migration and accumulation, Shahejie Formation, Dongying depression, Jiyang Subbasin

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