准噶尔盆地西北缘三叠系干旱型冲积扇储层内部构型特征
发布时间：2018-11-10 12:14
【摘要】：以克拉玛依油田一中区为例,综合现代沉积、岩芯、露头、密井网等资料,应用层次分析法深入解剖干旱型冲积扇内部构型。以冲积扇相带划分为基础,构建7~9级构型要素分级体系,明确构型要素的成因、规模及样式,建立精细的干旱型冲积扇构型模式。研究表明:①根据岩性组合、沉积构造等特征将冲积扇依次划分为槽流、片流、辫流及径流4个相带;②槽流带主体为宽带状槽流沉积体,由多期槽流砾石体垂向叠置而成,单期槽流砾石体顶部在间洪期受到小股牵引流侵蚀改造,发育网状的流沟系统;③片流带主体为扇状片流砂砾体,由多期片流朵体侧向—垂向复合而成,朵体顶部披覆的泥质夹层是稳定的渗流屏障;④辫流带主体为宽带状辫流水道,由洪水水道和间洪水道两种单一水道侧向复合而成,洪水水道规模较大、侧向迁移频繁、切割叠置关系复杂、物性较好,在油田注水开发过程中极易形成水窜通道,而间洪水道规模较小,侧向切叠程度较低、物性也较差;⑤径流带主体为漫流细粒沉积,在漫流细粒沉积的背景上发育径流水道,其水道规模小、物性差且易尖灭。
[Abstract]:Taking the first middle area of Karamay oilfield as an example, the internal configuration of arid alluvial fan is deeply dissected by analytic hierarchy process (AHP) by synthesizing the data of modern sedimentation, core, outcrop and dense well pattern. Based on the classification of alluvial fan facies, the classification system of 7 ~ (9) grade structural elements was constructed, and the formation, scale and style of the structural elements were clarified, and a fine configuration model of arid type alluvial fan was established. The results show that: 1 according to the lithologic assemblage, sedimentary structure and other characteristics, the alluvial fan can be divided into four facies zones: trough flow, slice flow, braided flow and runoff; (2) the main body of the trough flow zone is a broad-band trough flow sedimentary body, which is formed by vertical superposition of the multi-stage trough flow gravel body. The top of the single-stage trough flow gravel body is modified by small tug flow erosion during the interval flood period, and a net-like trench system is developed. The main body of the flow zone is fan-flow sand gravel, which is composed of multi-stage flake flow body sideways and vertical direction, and the muddy interlayer at the top of the flower body is a stable seepage barrier. (4) the main body of the braided flow zone is a broad-band braided channel, which is composed of two single watercourses, flood channel and interflow channel. The flood channel is large in scale, frequent in lateral migration, complicated in cutting superposition, and good in physical properties. It is easy to form water channeling channel in the process of oilfield water injection development, but the scale of interflow flood channel is smaller, the lateral tangent degree is lower, and the physical property is also poor. (5) the main body of the runoff zone is the diffuse fine grain deposition. The runoff channel is developed on the background of the diffuse fine grain deposition. The runoff channel is small in scale, poor in physical properties and easy to be destroyed.
【作者单位】： 中国石油大学(北京)油气资源与探测国家重点实验室;中国石油大学(北京)地球科学学院;长江大学计算机科学学院;中海石油(中国)有限公司天津分公司;
【基金】：国家自然科学基金资助项目(编号:41372116) 国家重大科技专项(编号:2011ZX05009-003)的成果~~
【分类号】：P618.13
本文编号：2322443
[Abstract]:Taking the first middle area of Karamay oilfield as an example, the internal configuration of arid alluvial fan is deeply dissected by analytic hierarchy process (AHP) by synthesizing the data of modern sedimentation, core, outcrop and dense well pattern. Based on the classification of alluvial fan facies, the classification system of 7 ~ (9) grade structural elements was constructed, and the formation, scale and style of the structural elements were clarified, and a fine configuration model of arid type alluvial fan was established. The results show that: 1 according to the lithologic assemblage, sedimentary structure and other characteristics, the alluvial fan can be divided into four facies zones: trough flow, slice flow, braided flow and runoff; (2) the main body of the trough flow zone is a broad-band trough flow sedimentary body, which is formed by vertical superposition of the multi-stage trough flow gravel body. The top of the single-stage trough flow gravel body is modified by small tug flow erosion during the interval flood period, and a net-like trench system is developed. The main body of the flow zone is fan-flow sand gravel, which is composed of multi-stage flake flow body sideways and vertical direction, and the muddy interlayer at the top of the flower body is a stable seepage barrier. (4) the main body of the braided flow zone is a broad-band braided channel, which is composed of two single watercourses, flood channel and interflow channel. The flood channel is large in scale, frequent in lateral migration, complicated in cutting superposition, and good in physical properties. It is easy to form water channeling channel in the process of oilfield water injection development, but the scale of interflow flood channel is smaller, the lateral tangent degree is lower, and the physical property is also poor. (5) the main body of the runoff zone is the diffuse fine grain deposition. The runoff channel is developed on the background of the diffuse fine grain deposition. The runoff channel is small in scale, poor in physical properties and easy to be destroyed.
【作者单位】： 中国石油大学(北京)油气资源与探测国家重点实验室;中国石油大学(北京)地球科学学院;长江大学计算机科学学院;中海石油(中国)有限公司天津分公司;
【基金】：国家自然科学基金资助项目(编号:41372116) 国家重大科技专项(编号:2011ZX05009-003)的成果~~
【分类号】：P618.13
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