扇三角洲前缘砂体内部结构控油模式

发布时间：2018-03-22 18:02

本文选题：赵凹油田赵凹区　切入点：扇三角洲前缘　出处：《大庆石油地质与开发》2017年01期 　论文类型：期刊论文

【摘要】：泌阳凹陷赵凹油田赵凹区经过多年开发,呈现综合含水高、采出程度低、剩余可采储量少的特征。以储层构型理论为指导,精细解剖核桃园组三段扇三角洲前缘水下分流河道和河口坝的内部结构,建立地质模型,并通过数值模拟分析储层剩余油分布状态,建立砂体内部结构控制剩余油分布模式。研究表明:水下分流河道以正韵律单砂体为主,渗流能力自下而上由强变弱,剩余油主要富集在砂体上部;河口坝单砂体主体为反韵律,渗透率较高,剩余油主要集中在砂坝上部,而坝侧缘和前缘剩余油则主要分布于坝缘下部;河口坝砂体一般发育多个增生体,各增生体间普遍发育泥质或钙质夹层和物性夹层,剩余油分布主要与注采井分布有关,只有注水井或采油井作用的增生体往往成为剩余油富集区。
[Abstract]:After many years of development in Zhaoao Oilfield of Biyang Sag, it shows the characteristics of high comprehensive water cut, low recovery degree and less remaining recoverable reserves. The internal structure of underwater distributary channel and estuarine dam in the front edge of the fan delta of the third member of the Waluoyuan formation is carefully dissected, the geological model is established, and the distribution of remaining oil in the reservoir is analyzed by numerical simulation. The model of residual oil distribution controlled by internal structure of sand body is established. The results show that the underwater distributary channel is dominated by positive rhythm single sand body, the percolation capacity changes from strong to weak from the bottom to the top, and the remaining oil is mainly enriched in the upper part of the sand body. The main body of single sand body of estuarine dam is anti-rhythmic, the permeability is high, the remaining oil is mainly concentrated in the upper part of the dam, while the remaining oil in the side edge and front edge of the dam is mainly distributed in the lower part of the dam edge, and there are many accretive bodies in the sand body of the estuary dam. Mud or calcareous intercalation and physical intercalation are generally developed among the accretive bodies, and the distribution of remaining oil is mainly related to the distribution of injection-production wells. Only the accretive bodies acting on water injection wells or production wells are often regarded as remaining oil-rich areas.
【作者单位】：复杂油气田勘探开发重庆市重点实验室;重庆科技学院石油与天然气工程学院;中国石油化工股份有限公司河南油田分公司采油一厂;
【基金】：国家科技重大专项项目“大型油气田及煤层气开发微尺度渗流数学模型的建立与分析”(2016ZX05013001-004) 重庆科技学院科研基金项目“基于测井资料的松辽盆地早白垩世古土壤层识别方法研究”(CK2016B15)
【分类号】：TE327

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