中国石油勘探 ›› 2020, Vol. 25 ›› Issue (3): 83-95.DOI: 10.3969/j.issn.1672-7703.2020.03.008

• 石油地质 • 上一篇    下一篇

塔里木盆地顺北地区油气差异聚集主控因素分析——以顺北1号、顺北5号走滑断裂带为例

刘宝增   

  1. 中国石化西北油田分公司
  • 出版日期:2020-05-15 发布日期:2020-05-15
  • 基金资助:
    国家科技重大专项“塔里木—鄂尔多斯盆地海相碳酸盐岩层系大中型油气田形成规律与勘探评价”(2017ZX05005-002); 中国石化科技部项目“塔里木盆地古生界大中型油气田目标评价与勘探技术”(P16088)。

Analysis of the main controlling factors of oil and gas differential accumulation in the Shunbei area, Tarim Basin - taking Shunbei No.1 and No.5 strike-slip fault zones as examples

Liu Baozeng   

  1. Sinopec Northwest Oilfield Company
  • Online:2020-05-15 Published:2020-05-15
  • Supported by:
     

摘要: 塔里木盆地顺北油田是受走滑断裂控制的碳酸盐岩超深层油田,受走滑断裂平面分段性和纵向分层性的 影响,油气聚集呈现明显的差异性。以顺北1 号、顺北5 号走滑断裂带为例,结合走滑断裂特征与油气动态产能的关 系,对顺北地区油气差异聚集主控因素进行研究,结果表明:走滑断裂的通源性、纵向输导性、分段性是油气差异聚 集的主控因素。其中走滑断裂通源性越强油气聚集程度越高;寒武系膏盐岩层系走滑断裂的倾角越大越利于油气纵向 输导进入奥陶系聚集;走滑断裂的活动强度和构造样式决定了储集体规模和连通性,张扭段相对平移段和压隆段储集 体规模和连通性更好,油气聚集程度更高。

 

关键词: 差异聚集, 主控因素, 走滑断裂, 顺北油田, 奥陶系

Abstract: The Shunbei oilfield in the Tarim Basin is an ultra-deep carbonate oilfield controlled by strike-slip faults. Influenced by the plane segmentation and vertical stratification of strike-slip faults, there are obvious differences in oil and gas accumulation. In this study, the main controlling factors of oil and gas differential accumulation in the Shunbei area are analyzed, taking Shunbei No.1 and No.5 strike-slip fault zones as examples, combined with the relationship between the characteristics of strike-slip faults and oil-gas dynamic productivity. The results show that: the main controlling factors of oil and gas differential accumulation are the connectivity to source rocks, vertical transporting, and segmentation of the strike-slip faults. The stronger the connectivity of strike-slip faults to source rocks, the higher the degree of hydrocarbon accumulation. The larger the dip angle of the strike-slip fault in the Cambrian gypsum formation, the more favorable the vertical hydrocarbon migration into the Ordovician reservoir. The activity intensity and structural pattern of strike-slip faults determine the scale and connectivity of reservoirs. The scale and connectivity of the reservoirs in transtensional segments are better than those in translational and compression-uplift segments, and so the degree of hydrocarbon accumulation is higher.

Key words: Differential accumulation, main controlling factors, strike-slip faults, Shunbei oilfield, Ordovician

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