石油学报 ›› 2008, Vol. 29 ›› Issue (6): 804-808.DOI: 10.7623/syxb200806003

• 地质勘探 • 上一篇    下一篇

油气储量评估与油气藏圈闭成因的主控因素

吴国干1, 胡允栋2, 王永祥1, 王德发3, 胡素云2, 袁选俊2   

  1. 1. 中国石油勘探与生产分公司 北京 100011;
    2. 中国石油勘探开发研究院 北京 100083;
    3. 中国地质大学 北京 100083
  • 收稿日期:2008-01-13 修回日期:2008-03-05 出版日期:2008-11-25 发布日期:2010-05-21
  • 基金资助:
    中国石油天然气集团公司科技项目“大面积岩性油气藏储量计算与合理勘探工作量研究”部分成果

Main control factors for estimation of oil and gas reserves and genesis of traps in oil and gas reservoirs

WU Guogan1, HU Yundong2, WANG Yongxiang1, WANG Defa3, HU Suyun2, YUAN Xuanjun2   

  1. 1. PetroChina Exploration and Production Company, Beijing 100011, China;
    2. PetroChina Exploration and Development Research Institute, Beijing 100083, China;
    3. China University of Geosciences, Beijing 100083, China
  • Received:2008-01-13 Revised:2008-03-05 Online:2008-11-25 Published:2010-05-21

摘要: 用容积法进行油气储量计算涉及三种边界,即圈闭边界、油气藏边界和储量边界,只有正确理解这三种边界的具体含义,合理把握已有资料对前两种边界的证实程度,才能合理地把握不同级别的储量边界。油气藏圈闭成因的各要素也是不同级别储量边界划分的界定要素,其中油气藏类型是主要前提:构造图和流体界面的证实程度决定了构造油气藏储量的可靠性;尖灭线位置是沉积型岩性圈闭油气藏最大的储量边界;物性边界与流体边界共同控制了成岩型岩性圈闭油气藏的储量规模;不整合面如同断层面一样,控制了地层型岩性不整合圈闭油气藏油气的分布。无论何种主控因素,在平面最大和纵向最深的界线范围内,井控程度是决定探明储量范围的控制因素。

关键词: 油气储量, 圈闭, 油气成藏, 容积法, 储量计算, 主控因素

Abstract: There are three types of limits or boundaries involved in the estimation of oil and gas reserves with volumetric analysis, including trap boundaries, reservoir limits and reserve limits. The reserve limits in different classes could be determined with proper certainties, only when the definitions of those three boundaries are correctly determined, and the existed data are reasonably estimated as evidences related to the first two boundaries. The elements as parts of reservoir-forming mechanism are also the factors in considering volume assignments as different reserve categories. Among them, the reservoir type is the primary condition. For the structural reservoirs, the reliability of reserves is subject to the extent of attestation to structure maps and fluid contacts. For the sedimentary lithological deposits, the positions of pinch outlines delineate the maximum outlines of reservoirs. For diagenetic lithological hydrocarbon traps, the cutoffs of porosity or permeability and the fluid contacts control the reservoir sizes. For unconformable screened lithostratigraphic reservoirs, the unconformity dominates the distribution of oil and gas. Whatever the principal factor is, within the maximal outlines in lateral and the lowest depth in vertical, the drainage area of well is the key factor to assign the measured reserve volume.

Key words: oil and gas reserves, trap, hydrocarbon reservoir, volumetric analysis, reserves estimation, main control factors

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