王滨涛,赵小青,董磊,贾善坡,王宏强
WANG Bintao,ZHAO Xiaoqing,DONG Lei,JIA Shanpo,WANG Hongqiang

• 1:东北石油大学地球科学学院
• 2:中国石油集团测井有限公司大庆分公司

摘要(Abstract)：

目前对海拉尔盆地贝尔凹陷南屯组二段油气成藏主控因素的研究大多集中在定性分析上，缺乏对有利成藏区带的精准定量预测，制约了其增储上产进程。基于油气藏分布临界条件分析，采用成藏主控因素耦合定量评价方法，对贝尔凹陷南屯组二段油气藏开展了油气分布规律研究。结果表明：贝尔凹陷南屯组二段控制油气成藏主控因素为烃源岩、盖层、孔隙度、砂岩厚度、断裂，其中南屯组二段排烃中心贝尔凹陷3 km范围内分布了89.6%以上的油气藏；南屯组二段储层孔隙度、砂岩厚度具有规律性展布特征，均呈现南部发育较好、东部发育较差的特点；油气盖层厚度410～460 m条件下聚集了大量油藏，随着盖层厚度增大，油藏个数先增大后减小，断裂密度较大区域成藏概率相对较高；将主控要素进行耦合，预测出南屯组二段发育2个最有利成藏区带，1个有利成藏区带，1个较有利成藏区带，1个成藏区带。实例验证表明，有利成藏区预测结果可靠，研究成果可为贝尔凹陷南二段油气藏勘探提供指导。
Current studies on main controlling factors of oil and gas accumulation in 2 nd member of Nantun Formation in Beier Sag of Hailar Basin mostly focuses on qualitative analysis, and the lack of accurate quantitative prediction for favorable accumulation zones restricts the process of increasing reserves and production. Based on the analysis of critical conditions for reservoir distribution, the method of coupling quantitative evaluation of main controlling factors of reservoir accumulation is used to study hydrocarbon distribution law of reservoirs in the second member of Nantun Formaiton in Beier Sag. The results show that main controlling factors of hydrocarbon accumulation in the second member of Nantun Formaiton of Beier Sag are source rock, cap rock, porosity, sandstone thickness and faults. Over 89.6% of reservoirs are distributed within 3 km from hydrocarbon expulsion centers in the second member of Nantun Formaiton. Reservoir porosity and sandstone thickness of the second member of Nantun Formaiton are characterized by regular extension, presenting good development in the south and poor development in the east. A large number of reservoirs accumulate in condition of cap rock with thickness of 410 ～ 460 m. With the increase of cap rock thickness, the number of reservoirs increases first and then decreases, and areas with large faults density have relatively high accumulation probability. Main controlling factors coupling predicts 2 most favorable accumulation zones, 1 favorable accumulation zone, 1 relatively favorable accumulation zone and 1 accumulation zone in the second member of Nantun Formaiton. Case study verifies the reliability of prediction results, and the research provides guidance for oil and gas reservoirs exploration of the second member of Nantun Formaiton in Beier Sag.

关键词(KeyWords)： 有利区预测;主控因素;成藏概率;临界条件;南屯组二段;贝尔凹陷;海拉尔盆地
favorable area prediction;main controlling factor;accumulation probability;critical condition;the second member of Nantun Formaiton;Beier Sag;Hailar Basin

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 王滨涛,赵小青,董磊,贾善坡,王宏强
WANG Bintao,ZHAO Xiaoqing,DONG Lei,JIA Shanpo,WANG Hongqiang

DOI: 10.19597/J.ISSN.1000-3754.202404017

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