天然气地质学

致密砂岩气藏超低含水饱和度形成地质过程及实验模拟研究

展开
  • (西南石油学院油气藏地质及开发工程国家重点实验室,四川 成都 610500)
张浩(1976-),男,湖南永顺人,博士研究生,从事开发地质学及油藏描述研究.

收稿日期: 2005-01-25

  修回日期: 2005-02-17

  网络出版日期: 2005-04-20

基金资助

四川省青年科技基金项目(编号:02ZQ026-042)资助.

THE STUDY OF GEOLOGY COURSE AND EXPERIMENT SIMULATION FORFORMING ULTRA-LOW WATER SATURATION IN TIGHTSANDSTONES GAS RESERVOIRS

Expand
  • (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, South west PetroleumInstitute Chengdu, Chengdu 610500, China)

Received date: 2005-01-25

  Revised date: 2005-02-17

  Online published: 2005-04-20

摘要

对致密砂岩气藏含水饱和度的认识直接影响气藏储量评价及开发决策。密闭取心和测井解释表明鄂尔多斯盆地北部上古生界致密砂岩气藏存在超低含水饱和度现象,气藏初始含水饱和度值范围低于束缚水饱和度范围。认为致密砂岩气藏超低含水饱和度形成于其独特的成藏过程,成藏过程中的生烃排液作用对超低含水饱和度的形成具有决定性影响,并通过室内对比实验作了验证。泥岩盖层的封隔作用、致密砂岩气藏气水过渡带内相对渗透率变化及持续生烃增压作用使得致密砂岩气藏超低含水饱和度最终得以保存。

本文引用格式

张浩,康毅力,陈一健,李前贵,高波 . 致密砂岩气藏超低含水饱和度形成地质过程及实验模拟研究[J]. 天然气地球科学, 2005 , 16(2) : 186 -189 . DOI: 10.11764/j.issn.1672-1926.2005.02.186

Abstract

Recognizing the water saturation in tight gas reservoirs directly affects reserv es evaluation and development measurement of the gas reservoirs. Sealed coring a nd log interpretation show there is an ultra-low water saturation in tight gas  reservoirs in northern Ordos basin, the initial water saturation in tight gas re servoirs is between 20% and 30%, which is far below the irreducible water satura tion. This article believe that the mechanism of forming ultra-low water satura tion in tight gas reservoirs is the result of the process of removing water duri ng hydrocarbon generating, then proving the conclusion by an experiment. The eff ects of isolation of mudstone, the variation of relative permeability between wa ter and gas in gas and water transitional zone, the continual gas accumulation i ncreasing the pressure in tight gas reservoirs are main issues for sustaining ul tra-low water saturation.

参考文献

[1]李振铎,胡义军,谭芸,等.鄂尔多斯盆地上古生界深盆气研究[J].天然气工业,1998,18(3):10-15.
[2]Bennion D B. Water and hydrocarbon phase trapping in porous media: Diagnosis, prevention and treatment[A].Petrol-   eum Society o f CIM 46th ATM[C]. 1995.
[3]Zuluaga E, Monsalve Grondona J C. Experiments on water vapou rization in porous media[J]. JCPT, 2003,Jul:7-8.
[4] 孙小平,石玉江.复杂孔隙结构储层含气饱和度评价方法[J].天然气工业, 2000,20(3):41-44.
[5]张敏榆,毛美利.低渗气藏水锁效应与抑制对策,低渗透油气田研究与实践( 卷三)[M].北京:石油工业出版社,2001336-340.
[6] 张浩,康毅力,陈一健,等.致密砂岩油气储层岩石变形理论与应力敏感性[J].天然气地球科学,2004,15(5):482-486.
[7] Bennion D B. Formation damage processes reducing productive of low permeability gas reservoirs[A]. SPE60325   [C].2000.
[8] 闵琪,杨华,付金华. 鄂尔多斯盆地的深盆气[J].天然气工业,2000,27( 4):27-29.
[9] 刘文彬,伏万军.陕甘宁盆地北部上古生界天然气直接盖层的酸解烃特征[J ].天然气地球科学,1995,6(5):17-23.
[10] 刘文彬,罗大恒,伏万军.陕甘宁盆地上古生界天然气泥质岩直接盖层的扩散系数研究[J].天然气地球科学,1996,7(1):30-33.
[11] 王涛.中国深盆气田[M].北京:石油工业出版社,2002.

文章导航

/