塔河油田下寒武统肖尔布拉克组构造控制热液白云岩储层分布与勘探前景

发布时间：2018-01-27 22:52

本文关键词： 塔里木盆地塔河油田下寒武统肖尔布拉克组侵入岩热液白云岩　出处：《地质科技情报》2017年02期 　论文类型：期刊论文

【摘要】：塔里木盆地寒武系-奥陶系碳酸盐岩受多期热液流体的影响,与热液相关的储集体发育。塔河油田下寒武统肖尔布拉克组内部存在多个异常体,由于埋藏深度大(8 500m),缺乏实钻资料而难以确定其地质属性。三维地震资料解释、正演模型和邻区钻井资料综合分析表明,异常体上方肖尔布拉克组厚度明显变薄下凹,引起上覆寒武系垮塌,奥陶系并未受到明显影响,进而表明异常体地质属性为寒武纪末期的侵入岩体。寒武纪末期,在深部火成岩热液流体溶蚀作用下,肖尔布拉克组热液白云岩储层发育,发生了角砾化和垮塌作用,导致上覆寒武系地层表现出凹陷构造。肖尔布拉克组构造控制热液白云岩储层沿轮台断裂以大小不等的次圆状分布,而相关的淋滤滩相白云岩储层分布较广。塔河油田肖尔布拉克组成藏条件优越,具有较好的勘探前景。
[Abstract]:Carbonate rocks of Cambrian-Ordovician in Tarim Basin are affected by hydrothermal fluid for many periods and the reservoir bodies related to hydrothermal fluids are developed. There are many abnormal bodies in the Lower Cambrian Scholburak formation in Tahe Oilfield. Because of the large buried depth of 8500mg, it is difficult to determine its geological attribute due to the lack of real drilling data. The interpretation of 3D seismic data, forward modeling and comprehensive analysis of drilling data in adjacent areas show that. The thickness of the Scholburak formation above the anomalous body is obviously thinning and concave, causing the collapse of the Cambrian overlying system, and the Ordovician is not obviously affected. The geological property of abnormal body is intrusive rock mass at the end of Cambrian. At the end of Cambrian period, hydrothermal dolomite reservoir of Scholburak formation developed under the action of hydrothermal solution of deep igneous rock. Breccification and collapse occurred, which resulted in the overlying Cambrian strata showing sag structure. The Scholburak formation structure controlled the sub-circular distribution of hydrothermal dolomite reservoir along the Luntai fault. The reservoir distribution of the related leachate facies dolomite is relatively wide, and the Scholburak reservoir in Tahe Oilfield has a good exploration prospect because of its superior composition conditions.
【作者单位】：中国石化西北油田分公司勘探开发研究院;广东石油化工学院石油工程学院;四川省国土勘测规划研究院;
【基金】：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”(2011ZX05005-004) 国家重点基础研究发展计划(973计划)“中国下古生界大型油气保存条件与分布预测”(2012CB214806)
【分类号】：P618.13
【正文快照】： 热液白云岩储层分布与勘探前景邵小明1,文山师1,刘存革2,罗鹏3,罗明霞1,刘永立1(1.中国石化西北油田分公司勘探开发研究院,乌鲁木齐830011;2.广东石油化工学院石油工程学院,广东茂名525000;3.四川省国土勘测规划研究院,成都610045)热液流体在沉积盆地中广泛存在,对碳酸盐岩油

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