天然气地质学

东营凹陷古近系沙三段异常高压及成藏响应

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  • (1.长庆油田勘探开发研究院,陕西 西安  710021;2.石油大学石油天然 气成藏机理教育部重点实验室,  北京 昌平  102249)
    
万晓龙(1978-),男,江苏海 安人,硕士生,主要从事油气形成与分布研究.

收稿日期: 2003-07-22

  修回日期: 2003-11-17

  网络出版日期: 2004-02-20

基金资助

国家“十五”攻关项目“济南坳陷复杂隐蔽油气藏地质评价和关键技术研究 ”(编号:2001BA605A09)资助.

ABNORMAL HIGH-PRESSURE OF EARLY TERTIARY IN DONGYING DEPRESSION AND ITS RESPONSE TO HYDROCARBON ACCUMULATION

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  • (1. Research Institute of Exploration and Development, Changqing Oilf ield Ltd., PetroChina, Xi'an 710021, China;
    2. Key Laboratory for Hydrocarbon Accumulation Mechanism of Education Ministry,  Beijing 102249, China)

Received date: 2003-07-22

  Revised date: 2003-11-17

  Online published: 2004-02-20

摘要

通过对东营凹陷古近系异常高压分布和砂岩透镜体成藏响应特征分析后认为:岩性油气藏发育的沙三段主要处于下部异常高压体系中;平面上,该高压体系的分布基本上与生油洼陷一致――北部陡坡带压力系数较高,南部缓坡带压力系数相对较低,这与欠压实发育带分布规律具有很好的一致性,也就证实了欠压实和泥岩成熟生烃作用是导致东营凹陷沙三段普遍超压的重要因素;包围在异常高压泥岩中的透镜体处于低势区,在泥岩和砂岩流体压力差异作用下,泥岩破裂,发生幕式排烃作用;砂体在烃类充注之后,也形成与烃源岩平面分布规律相似的较高的流体压力。

本文引用格式

万晓龙;邱楠生,李亮,曾溅辉 . 东营凹陷古近系沙三段异常高压及成藏响应[J]. 天然气地球科学, 2004 , 15(1) : 95 -98 . DOI: 10.11764/j.issn.1672-1926.2004.01.95

Abstract

Lithological reservoirs are developed in below abnormal hig h-pressure system, by analyzing character of the distribution of pressure of ea rly-Tertiary in Dongying Depression and its response to the lens' hydrocarbon a ccumulation. The distribution of abnormal high-pressure is in accord with sourc e-subdepression in plane on the whole. Pressure coefficient is higher in north  region and lower in south region, which is correspond with the distribution of u ndercompaction region. The main factors, which led to Es3 abnormal high-p ressure in Dongying depression, are undercompaction and hydrocarbon generation.  Hydrocarbon accumulation of lens reservoirs are controlled by the distribution o f abnormal high-pressure. Lens reservoirs, enveloped in dark mudstone, is mostl y distributed in relative low-pressure region. Microfracture and episodic expul sion hydrocarbon of mudstone are generated by pressure difference between mudsto ne and lens. Sandstones have relative high fluid pressure after hydrocarbon filling.

参考文献

 [1 ] 曾溅辉,郑和荣,王宁.东营凹陷岩性油气藏成藏动力学特征[J].石油与天然气地质,1998,(4):326-329.
  [2 ]  邱桂强,凌云,樊洪海.东营凹陷古近系烃源岩超压特征及分布规律 [J ]. 石油勘探与开发,2003,30(3):71-75.
  [3 ]  陈荷立,汤锡元.山东东营凹陷泥岩压实作用及油气初次运移问题探讨 [J ] .石油学报,1983,4(2):9-16.
  [4 ]  杜栩,郑洪印,焦秀琼.异常压力与油气分布 [J ].地学前缘,1995,2(3-4):137-148.
  [5 ]  郑和荣,黄永玲,冯有良.东营凹陷下第三系地层异常高压体系及其石油地质意义[J ].石油勘探与开发,2000,27(4):67-70.
  [6 ]  刘晓峰,解习农.东营凹陷流体压力系统研究[J ].地球科学——中国地 质大学学报,2003,28(1):78-86.
  [7 ]  Law B E, Dichison W W. Conceptual model for origin of abnormally pr essured gas accumulation in low-permeability reservoirs [J ]. AAPG Bulletin, 19 85, 69(8): 1295-1304.
  [8 ]  Hunt J M. Generation and migration of petroleum from abnormally pressured fluid compartment [J ]. AAPG Bulletin, 1990, 74(1): 1-12.
  [9 ]  Barker C. Calculated volume and pressure changes during the thermal  cracking of oil to gas in reservoirs [J ]. AAPG Bulletin, 1990, 74(8): 1254-1261.
 [10 ]  邱楠生,金之钧,胡文喧.东营凹陷油气充注的流体包裹体分析 [J ].石油大学学报(自然科学版),2001,24(4):95-97.
 [11 ]  Hu Wenxuan, Jin Zhijun, Qiu Nansheng, et al. Boiling proce ss of low temperature formation water in petroleum syst-       ement [J ]. Qa idam Basin. China Science Bulletin, 1999, 44(Supplement): 77-78.
 [12 ]  邱楠生,金之钧.油气成藏的脉动式探讨 [J ].地学前缘,2000,7(4):561-56 7.
 [13 ]  邱楠生,张善文,金之钧.东营凹陷油气流体运移模式探讨——来自沸腾包裹体的证据 [J ].石油实验地质,2000,23(4):403-407.
 [14 ]  王志欣,张一伟.油气地质演化过程中的渐变与突变 [J ].石油大学学报(自然科 学版),2000,24(4):34-42.[ZK)]

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