西藏伦坡拉盆地牛堡组一段沉积特征及勘探意义

发布时间：2019-01-17 10:48

【摘要】：西藏伦坡拉盆地是经勘探证实的含油气盆地,已提交控制储量721万t,具有一定的勘探潜力。早期油气勘探主要集中在东北部,揭示储层薄、物性差,未取得实质性突破。受低勘探程度制约,牛堡组的已有地质认识存在局限性,尤其是对牛堡组一段在中西部沉积充填模式的认识不够深入。前期认为盆地的断陷期主要发生在牛二段,是盆地烃源岩主发育期。近期研究表明牛堡组一段沉积时期,存在"南主断、西主洼"的盆地格局,西南部为沉积中心,发育较好的烃源岩,打破了早期牛堡组一段为一套红层不发育烃源岩的认识,研究结果对下一步拓宽勘探思路及勘探领域具有重要意义。
[Abstract]:The Luompola basin in Tibet is an oil and gas bearing basin confirmed by exploration. It has been submitted to control reserves for 7.21 million t and has a certain exploration potential. The early oil and gas exploration was mainly concentrated in the northeast, which revealed that the reservoir was thin, the physical property was poor, and no substantial breakthrough was made. Restricted by the low exploration degree, the existing geological knowledge of Niubu formation is limited, especially the understanding of the first member of Niubu formation in the central and western sedimentary filling model is not deep enough. It is considered that the fault stage of the basin occurred mainly in the second stage of Niu formation, which is the main developing period of the source rocks in the basin. Recent studies have shown that there is a basin pattern of "south main fault, west main depression" in the first member of Niupu formation, and the southwestern part is the sedimentary center, which is well developed source rock, which breaks the understanding that the first member of the Niubu formation is a set of undeveloped source rocks in the red bed in the early period. The research results are of great significance to broaden the exploration ideas and exploration fields in the next step.
【作者单位】：中国石化勘探分公司;中国地质大学(武汉)构造与油气资源教育部重点实验室;
【基金】：中国石化勘探分公司“伦坡拉盆地牛堡组沉积储层特征及成藏规律研究”(G0800-14-KK-169) 国家自然科学基金项目(40172051)
【分类号】：P618.13

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