吉和油田H76断块TⅢ油层组沉积微相及砂体分布特征研究
发布时间:2018-10-14 17:03
【摘要】:吉和油田H76断块已进入高含水开发阶段,由于综合含水率的上升,产量进入递减阶段,大量剩余油富集在砂体内部。论文以沉积微相研究为基础,查明研究区的物源方向、搞清砂体的成因及分布规律,分析砂层的空间叠置关系,探讨不同类型的砂层空问叠置形式与剩余油的关系。 论文首先以沉积旋回特征为主要对比标志,结合前人研究成果,将吉和地区H76断块TⅢ油层组分为9个小层,在此基础上对9个小层的沉积微相进行研究。通过对相标志的识别及前人研究成果,认为研究区为近岸水下扇沉积,发育主水道、水道间、辫状水道、扇中前缘和辫状水道间等微相。在确定研究区沉积背景的基础上,对小层沉积微相平面展布特征、垂向演化特征及砂体平面分布特征展开研究;通过建立解释标准,对研究区有效砂体进行识别,并从几何形态、规模及侧向连续性对有效砂体的平面分布情况进行描述。在认识研究区地层、沉积特征的基础上,借助储层构型理论,对切叠的复合砂层进行垂向上的劈分,将其内部砂层的空间叠置形式细分为四种类型,并分析每种类型的接触方式与连通关系。通过对砂层几何形态、分布样式、组合关系的分析,结合研究区近岸水下扇的沉积特征来揭示油水运动规律,探讨砂层空间叠置形式与剩余油的关系,提出可能出现的剩余油分布区域为研究区中部H76-53井~H76-55井及北部H76-64井~H76-86井。剩余油潜在富集区将成为油田后期开采工作的重点研究区域。
[Abstract]:The fault block H76 in Jihe Oilfield has entered the stage of high water cut development. Due to the increase of comprehensive water cut, the production has entered the stage of decline, and a large amount of remaining oil is enriched in the sand body. Based on the study of sedimentary microfacies, the paper finds out the source direction of the study area, makes clear the origin and distribution law of sand body, analyzes the spatial superposition relation of sand bed, and probes into the relationship between different types of sand layer space overlapping form and remaining oil. Based on the characteristics of sedimentary cycle and previous research results, this paper divides the T 鈪,
本文编号:2271063
[Abstract]:The fault block H76 in Jihe Oilfield has entered the stage of high water cut development. Due to the increase of comprehensive water cut, the production has entered the stage of decline, and a large amount of remaining oil is enriched in the sand body. Based on the study of sedimentary microfacies, the paper finds out the source direction of the study area, makes clear the origin and distribution law of sand body, analyzes the spatial superposition relation of sand bed, and probes into the relationship between different types of sand layer space overlapping form and remaining oil. Based on the characteristics of sedimentary cycle and previous research results, this paper divides the T 鈪,
本文编号:2271063
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