高分辨率层序格架下的陆相湖盆精细沉积体系研究——以吐哈盆地西缘侏罗系—古近系为例

发布时间：2018-07-07 23:27

本文选题：沉积体系 + 高分辨率层序格架　；参考：《岩性油气藏》2017年05期

【摘要】：为深化吐哈盆地吐鲁番坳陷西部富油气区侏罗系—古近系岩性油气藏精细勘探,以井-震匹配的四级层序格架建立为基础,系统开展了高分辨率层序格架约束下的精细沉积体系研究。结果表明:井-震匹配的四级层序格架单元是开展空间精细沉积体系研究的最大单元;层位与储层的两步标定是准确建立井-震匹配关系的关键步骤;等时层序格架内的地震反射横向变化分析是明确沉积体系横向对接和演变的核心。研究认为:北部天山和南部觉罗塔格造山带的差异构造活动是控制沉积体系横向变迁的主要因素;辫状河三角洲前缘水下分流河道是最主要的储集体类型;依附于古构造背景发育的河道侧向、上倾尖灭砂体是盆地西缘葡北、葡萄沟、神泉、胜南地区岩性油气藏扩展勘探的有利方向。在该认识指导下,吐鲁番坳陷西部富油气区岩性油气藏扩展勘探取得了良好效果。
[Abstract]:In order to deepen the fine exploration of Jurassic-Paleogene lithologic reservoirs in the western Turpan depression of Turpan depression, a four-order sequence framework matching well and earthquake was established. The fine sedimentary system constrained by high resolution sequence framework was studied systematically. The results show that the four-order sequence framework unit of well-earthquake matching is the largest unit in the study of spatial fine sedimentary system, and the two-step calibration of horizon and reservoir is the key step to establish the well-earthquake matching relationship accurately. The lateral variation analysis of seismic reflection in the isochronous sequence framework is the core of defining the lateral docking and evolution of sedimentary systems. It is considered that the differential tectonic activity between the northern Tianshan and the southern Jurothagic orogenic belt is the main factor controlling the lateral changes of sedimentary system, the underwater distributary channel in the front of braided river delta is the main reservoir type, and the subaqueous distributary channel in the front of braided river delta is the main reservoir type. Depending on the lateral channel of paleotectonic setting, the updip pinnacle is the favorable direction for the exploration of lithologic oil and gas reservoirs in the western margin of the basin in Pubei, Gougou, Shenquan and Shengnan areas. Under the guidance of this understanding, the extended exploration of lithologic oil and gas reservoirs in the western Turpan depression has achieved good results.
【作者单位】：中国石油勘探开发研究院西北分院;中国石油天然气集团公司油藏描述重点实验室;中国石油吐哈油田分公司勘探开发研究院;中国石油新疆油田分公司采油一厂;
【基金】：国家油气重大专项“岩性地层油气藏区带、圈闭评价方法与关键技术”(编号:2017ZX05001-003)资助
【分类号】：P618.13

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