石油学报 ›› 2012, Vol. 33 ›› Issue (S1): 63-70.DOI: 10.7623/syxb2012S1008

• 地质勘探 • 上一篇    下一篇

济阳坳陷古近系红层沉积成藏主控因素与勘探潜力

刘传虎 韩宏伟   

  1. 中国石油化工股份有限公司胜利油田分公司 山东东营 257000
  • 收稿日期:2011-12-27 修回日期:2012-03-31 出版日期:2012-08-25 发布日期:2012-08-30
  • 通讯作者: 刘传虎
  • 作者简介:刘传虎,男,1964年2月生,1986年山东海洋学院本科毕业,2000年获中国科学院地质与地球物理研究所博士学位,现为中国石油化工股份有限公司胜利油田分公司教授级高级工程师,主要从事石油地质及地球物理综合研究工作。
  • 基金资助:

    中国石油化工股份有限公司重大基础研究项目“盆地升降过程油气富集机理及富集模式”(P06086)资助。

Main controlling factors of deposition, hydrocarbon accumulation and exploration potential of Paleogene red beds in Jiyang depression

LIU Chuanhu HAN Hongwei   

  • Received:2011-12-27 Revised:2012-03-31 Online:2012-08-25 Published:2012-08-30

摘要:

济阳坳陷古近系沙河街组四段下亚段(简称沙四下段)至孔店组广泛发育陆相红层沉积。迄今已经在东营、惠民、渤南等地区发现了该套红层作为储层的油气藏并部分投入开发。研究表明,济阳坳陷沙四下段—孔店组红层属干旱气候条件下的洪水漫湖沉积,其储层主要为洪水沟道、扇中辫状河道及漫湖砂坪沉积的细砂岩、粉砂岩,自上而下发育了以原生孔隙为主至次生孔隙为主的5个储层孔隙带,具有他源成藏的特点,其主力烃源岩为沙河街组四段上亚段(简称沙四上段)及沙河街组三段下亚段(简称沙三下段),沙四下段—孔店组也具备较大生烃潜力。已有发现表明主要为断块圈闭油藏及构造岩性复合圈闭油藏,可初步分为以断裂及砂体作为主要油气输导层的4类成藏模式。济阳坳陷沙四下段—孔店组红层有利勘探面积1.2×104 km2 以上,具备广阔勘探前景。

关键词: 济阳坳陷, 孔店组, 红层, 沉积相, 储层, 勘探潜力

Abstract:

The deposition of continental red beds is widely developed from the lower sub-member of the 4th member in Shahejie Formation (lower Es4) to Kongdian Formation (Ek) of Paleogene in Jiyang depression. So far, the hydrocarbon reservoirs which take the red beds as the reservoirs have been found in Dongying, Huimin, and Bonan regions, and put partially into the development. Studies have shown that the red beds of lower Es4-Ek in Jiyang depression belong to the flooded lake sediments in arid climatic conditions. The reservoirs are mainly fine sandstones and siltstones deposited in the flood channels, middle-fan braided channels and sand flat of flooded lake. 5 reservoir pore belts that transit from primary pore dominant to secondary pore dominant are developed from top to bottom, with characteristics of allochthonous accumulation. The main hydrocarbon source rocks are the upper sub-member of 4th member in Shahejie Formation (upper Es4) and the lower sub-member of 3rd member in Shahejie Formation (lower Es3). Also the lower Es4-Ek Formation has larger hydrocarbon generation potential. Some findings have indicated that the main types of reservoir are fault block trap, structure-lithology compound. It can be initially divided into four accumulation modes with faults and sand bodies as the major oil and gas transport layer. With the favorable exploration area of more than 1.2×104 km2, red beds of lower Es4-Ek Formation in Jiyang depression has broad exploration prospects.

Key words: Jiyang depression, Kongdian Formation, red beds, sedimentary facies, reservoir, exploration potential