中非Melut盆地高砂地比地层成藏特征与富集规律
发布时间：2018-10-10 12:41
【摘要】：Melut盆地为中非被动裂谷盆地,具有丰富的油气资源,盆地发育2种类型的高砂地比地层。其中,古近系Yabus组与Samma组区域性厚层砂岩与Adar组区域泥岩形成的区域性高砂地比地层为盆地勘探初期的主力成藏组合,主要形成各种反向断块、断鼻等构造油藏;上白垩统Galhak组近源局部性砂泥互层高砂地比地层为盆地中后期构造—岩性及岩性地层油气藏勘探的主要成藏组合,为盆地新的成藏组合和勘探层系。通过对Galhak组高砂地比地层油藏特征、富集规律、油藏评价与勘探方法的研究,首次提出"湖泛泥岩控藏"与"辫状河三角洲内前缘分流河道砂体控富"认识,指出湖泛泥岩是Galhak组高砂地比地层成藏主控因素,"高孔厚砂岩"是高产油层形成的储层条件,辫状河三角洲内前缘是高产油层发育的有利相带。同时,提出了以湖泛泥岩划分与对比为基础的分层系评价,提高大套高砂地比地层的垂向研究尺度和评价精度;及以测井、录井、油藏地质等多方法相结合的油水综合判识,提高大套高砂地比地层复杂断块油藏油水关系与油藏认识的合理性。该研究提升了Melut盆地局部性砂泥互层高砂地比地层的勘探潜力,拓展了盆地勘探空间,对中西非相似被动裂谷盆地高砂地比地层的勘探具有借鉴意义。
[Abstract]:The Melut basin is a non-passive rift basin with abundant oil and gas resources. Among them, the regional thick sandstone of Paleogene Yabus formation and Samma formation and regional mudstone of Adar formation are the main reservoir forming assemblages in the early stage of basin exploration, mainly forming various reverse fault blocks, fault nose and other structural reservoirs. The upper Cretaceous Galhak formation is the main reservoir forming assemblage of tectonic-lithologic and lithostratigraphic oil and gas reservoir exploration in the middle and late stage of the basin, and is a new reservoir formation and exploration strata in the basin. Based on the study of reservoir characteristics, enrichment rules, reservoir evaluation and exploration methods of high sand / ground ratio formation in Galhak formation, it is proposed for the first time that "the reservoir control of lacustrine pan mudstone" and "sand body control of distributary channel in front edge of braided river delta" are known for the first time. It is pointed out that the lacustrine pan mudstone is the main factor of reservoir formation in the Galhak formation with high sand ratio, "high porosity and thick sandstone" is the reservoir condition for the formation of high yield oil layer, and the front edge of braided river delta is the favorable facies zone for the development of high yield oil layer. At the same time, based on the division and correlation of the lacustrine pan mudstone, the evaluation of stratified system is put forward to improve the vertical research scale and the evaluation accuracy of the large set of high sand / ground ratio strata, and the comprehensive judgment of oil and water is based on the combination of logging, reservoir geology and so on. It is reasonable to improve the oil-water relationship and reservoir understanding in large sets of reservoirs with high sand ratio and complex fault block formation. This study has promoted the exploration potential of the local sand and mud interbedded high sand ratio formation in Melut basin, and expanded the exploration space of the basin, which has reference significance for the exploration of the high sand ratio formation in the similar passive rift basin in Central and West Africa.
【作者单位】： 中国石油勘探开发研究院西北分院;
【基金】：国家科技重大专项“大型油气田及煤层气开发”(编号:2008ZX05029)资助
【分类号】：P618.13
本文编号：2261808
[Abstract]:The Melut basin is a non-passive rift basin with abundant oil and gas resources. Among them, the regional thick sandstone of Paleogene Yabus formation and Samma formation and regional mudstone of Adar formation are the main reservoir forming assemblages in the early stage of basin exploration, mainly forming various reverse fault blocks, fault nose and other structural reservoirs. The upper Cretaceous Galhak formation is the main reservoir forming assemblage of tectonic-lithologic and lithostratigraphic oil and gas reservoir exploration in the middle and late stage of the basin, and is a new reservoir formation and exploration strata in the basin. Based on the study of reservoir characteristics, enrichment rules, reservoir evaluation and exploration methods of high sand / ground ratio formation in Galhak formation, it is proposed for the first time that "the reservoir control of lacustrine pan mudstone" and "sand body control of distributary channel in front edge of braided river delta" are known for the first time. It is pointed out that the lacustrine pan mudstone is the main factor of reservoir formation in the Galhak formation with high sand ratio, "high porosity and thick sandstone" is the reservoir condition for the formation of high yield oil layer, and the front edge of braided river delta is the favorable facies zone for the development of high yield oil layer. At the same time, based on the division and correlation of the lacustrine pan mudstone, the evaluation of stratified system is put forward to improve the vertical research scale and the evaluation accuracy of the large set of high sand / ground ratio strata, and the comprehensive judgment of oil and water is based on the combination of logging, reservoir geology and so on. It is reasonable to improve the oil-water relationship and reservoir understanding in large sets of reservoirs with high sand ratio and complex fault block formation. This study has promoted the exploration potential of the local sand and mud interbedded high sand ratio formation in Melut basin, and expanded the exploration space of the basin, which has reference significance for the exploration of the high sand ratio formation in the similar passive rift basin in Central and West Africa.
【作者单位】： 中国石油勘探开发研究院西北分院;
【基金】：国家科技重大专项“大型油气田及煤层气开发”(编号:2008ZX05029)资助
【分类号】：P618.13
【相似文献】
相关期刊论文 前4条
1 张远银;王天奇;苏玉平;孙赞东;方乐华;史忠生;何巍巍;白洁;;苏丹Melut盆地扇体识别方法[J];石油地球物理勘探;2012年S1期
2 史忠生;王天琦;方乐华;李娟;白洁;何微微;马凤良;贾义容;;从类比中探索Muglad与Melut两大盆地勘探潜力与转型[J];中国石油勘探;2014年02期
3 程顶胜;窦立荣;史卜庆;马陆琴;肖坤叶;李志;;苏丹Melut盆地Palogue油田高酸值原油成因[J];石油勘探与开发;2010年05期
4 ;[J];;年期
，本文编号：2261808
本文链接：https://www.wllwen.com/kejilunwen/diqiudizhi/2261808.html
