| 断裂对辽河西部凹陷大洼油田油气成藏和分布的控制作用 |
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| 引用本文： | 高先志,李建海,邹志文,刘峰.断裂对辽河西部凹陷大洼油田油气成藏和分布的控制作用[J].现代地质,2008,22(4). |
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| 作者姓名： | 高先志 李建海 邹志文 刘峰 |
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| 作者单位： | 1. 中国石油大学,资源与信息学院,北京,102249;中国石油大学,油气资源与勘测国家重点实验室,北京,102249
2. 中国石油大学,资源与信息学院,北京,102249 |
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| 摘 要： | 位于辽河西部凹陷的大洼油田属于多断块油田,受大洼断裂带的影响,不同断块不同油层的原油性质和化学组成有较大差异,并且浅层原油成熟度高于深层原油的成熟度。这些差异反映断层在不同时期的活动对油气运移和分布产生的作用不同。大洼主干断裂是一个基底断裂,是一个古近纪长期活动的生长断裂,它控制着清水洼陷的沉积;在始新世形成的断层成为沙三段烃源岩向东营组地层供烃的油源断层;在东营组末以来形成的断层为控制东营组油气分布的控藏断层。断层多期活动以及烃源岩排烃动力的幕式变化导致大洼油田不同深度油层的油气成熟度垂向分布"颠倒"。不同时期烃源岩排烃动力的变化与东营组地层内不同砂体孔渗性的差异,导致油气进入储层时的动力和阻力的差异也是大洼油田油气水分布复杂的可能原因。
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| 关 键 词： | 断裂 断块油田 油气运移 成熟度 古近纪 大洼油田 辽河凹陷 |
Effect of Faults on the Migration and Accumulation of the Petroleum in Dawa Oilfield, Liaohe Subbasin |
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| GAO Xian-zhi,LI Jian-hai,ZOU Zhi-wen,LIU Feng.Effect of Faults on the Migration and Accumulation of the Petroleum in Dawa Oilfield, Liaohe Subbasin[J].Geoscience——Journal of Graduate School,China University of Geosciences,2008,22(4). |
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| Authors: | GAO Xian-zhi LI Jian-hai ZOU Zhi-wen LIU Feng |
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| Abstract: | Dawa oilfield consists of multi-fault blocks of reservoirs.The contents and properties of crude oil vary among different blocks;and the oil maturation increases especially from the deep bed to the shallow for the reason of the variation of the faults in the forming time and in the sealing capacity.The main fault in Dawa oilfield is a long-term active fault,companying with SWW direction faults in Eocene and NWW-EW direction faults in Neocene.Faults in Eocene play a role of petroleum migration pathway from the Es3 formation,and the fault in Neocene control the petroleum accumulation in Ed formation.The later faults transported much higher-maturation petroleum than the early faults because the degree of petroleum maturation in source bed is more and more higher.The episodic release of the abnormal pressure in source rocks also contribute to the different maturations in different beds vertically and different blocks laterally.The occurrence of the oil and gas in different formations also depends on the balance of the migration ability of petroleum from the source rock and the resistance force of the capillary pressure of the reservoir rock. |
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| Keywords: | fault accumulation in fault block petroleum migration maturation Neocene Dawa oilfield Liaohe subbasin |
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