利用地层切片研究河道砂体发育特征——以南图尔盖盆地Doshan地区为例
发布时间：2018-08-19 12:39
【摘要】：针对目的层埋深大、钻井稀少且分布不均所造成的沉积相研究和砂体预测的难题,以哈萨克斯坦南图尔盖盆地Doshan地区为例,在层序地层学和沉积学研究的基础上,充分挖掘三维地震数据的横向分辨能力,利用90°相位转换、地层切片、分频处理等地震沉积学关键技术,通过单井相标定地层切片属性的实际地质意义,应用纵向关联的多张地层切片,识别出阿克沙布拉克组(SQ_8层序)至少发育六期河道,其中SQ_(8-1)旋回内发育两期,为河道发育最广泛、最强烈的时期;SQ_(8-2)旋回内河道稀疏,纵向连续性差;SQ_(8-3)旋回河道分布局限,水体范围缩小,与SQ_(8-1)、SQ_(8-2)相比较具有沉积的继承性特征,反映出水体深度有所变浅,经历了一期以水进为主的水进—水退过程。研究表明,地层切片技术有效地描述了河道的平面几何形态与不连续性,这为本区岩性地层圈闭的描述与预测提供了地质依据。
[Abstract]:In view of the difficult problems of sedimentary facies research and sand body prediction caused by large buried depth, rare drilling and uneven distribution, taking the Doshan area of South Turgai Basin of Kazakhstan as an example, the study of sequence stratigraphy and sedimentology is carried out. Fully excavating the lateral resolution of 3D seismic data, utilizing the key seismic sedimentology techniques such as 90 掳phase conversion, stratigraphic slicing and frequency division processing, calibrating the actual geological significance of stratigraphic slicing attributes through single well facies. By using longitudinally correlated multi-slice stratigraphic slices, the Akshabrak formation (SQ_8 sequence) is identified as developing at least six stages of the channel, in which SQ8-1 cycle develops in two phases, which is the most widely developed and the strongest stage in which the SQ8-2 cycle is sparse. The longitudinal continuity difference between SQ8-3 and SQ8-3 is limited in distribution and the range of water body is reduced. Compared with SQ8-2, SQ8-2 has the inherited characteristics of sedimentation, which shows that the depth of the water body has become shallow, and has experienced a process of water advancing and retreating. The study shows that the stratigraphic slicing technique can effectively describe the plane geometry and discontinuity of the channel, which provides the geological basis for the description and prediction of lithostratigraphic traps in this area.
【作者单位】： 页岩油气富集机理与有效开发国家重点实验室;中国地质大学(北京)能源学院;中国石化石油勘探开发研究院;内蒙古矿业(集团)绿能非常规天然气勘查开发有限责任公司;
【基金】：中国地质大学(北京)科研生产项目“Aryskum坳陷斜坡带岩性-地层圈闭评价”项目(编号:CNPCIRC-2013-xx)资助
【分类号】：P618.13;P631.4
，
本文编号：2191674
[Abstract]:In view of the difficult problems of sedimentary facies research and sand body prediction caused by large buried depth, rare drilling and uneven distribution, taking the Doshan area of South Turgai Basin of Kazakhstan as an example, the study of sequence stratigraphy and sedimentology is carried out. Fully excavating the lateral resolution of 3D seismic data, utilizing the key seismic sedimentology techniques such as 90 掳phase conversion, stratigraphic slicing and frequency division processing, calibrating the actual geological significance of stratigraphic slicing attributes through single well facies. By using longitudinally correlated multi-slice stratigraphic slices, the Akshabrak formation (SQ_8 sequence) is identified as developing at least six stages of the channel, in which SQ8-1 cycle develops in two phases, which is the most widely developed and the strongest stage in which the SQ8-2 cycle is sparse. The longitudinal continuity difference between SQ8-3 and SQ8-3 is limited in distribution and the range of water body is reduced. Compared with SQ8-2, SQ8-2 has the inherited characteristics of sedimentation, which shows that the depth of the water body has become shallow, and has experienced a process of water advancing and retreating. The study shows that the stratigraphic slicing technique can effectively describe the plane geometry and discontinuity of the channel, which provides the geological basis for the description and prediction of lithostratigraphic traps in this area.
【作者单位】： 页岩油气富集机理与有效开发国家重点实验室;中国地质大学(北京)能源学院;中国石化石油勘探开发研究院;内蒙古矿业(集团)绿能非常规天然气勘查开发有限责任公司;
【基金】：中国地质大学(北京)科研生产项目“Aryskum坳陷斜坡带岩性-地层圈闭评价”项目(编号:CNPCIRC-2013-xx)资助
【分类号】：P618.13;P631.4
，
本文编号：2191674
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