欢喜岭油田杜813块油藏精细描述
发布时间：2018-08-14 15:48
【摘要】：辽河油田欢喜岭辖区杜813区块原油地质储量大,原油流体性质具有“四高一低”的特点:即,高密度、高粘度、高凝固点、高沥青+胶质和低含蜡量。从2002年开始对欢喜岭辖区杜813区块有计划的开采,经历了蒸汽吞吐、蒸汽驱以及SAGD技术等采油工艺,但油井产出逐年递减。其原因主要是由于杜813南块油藏内部非均质性强,流体可流动性差,导致低效井多,动用程度较低,剩余储量较大,开采效益差。因此迫切需要对本地区的层序、构造、储层和油水分布等进行精细剖析,以指导油田下步的油气开发调整工作。本文采用油藏描述技术,对欢喜岭油田的杜813区块油藏进行精细剖析,通过层序地层学、沉积相等理论对杜813南区块油层小层进行详细划分与对比。在小层划分与对比的基础上,对研究区油藏构造、储层条件和原油流体物性等进行研究。结合研究区油井生产方式以及影响产能的因素,最终对杜813区块油藏储量评估进行重新认识,确定开采潜力区域并建议部署水平井2口。通过研究主要取得以下认识:(1)在标志层控制下,按照层序地层学分层原则,将杜813南块兴隆台油层自上而上分为4个油层组:兴Ⅰ、兴Ⅱ、兴Ⅲ、兴Ⅳ和7个砂岩组;(2)杜813南块油层埋藏浅、地层压实作用弱、胶结差、储层物性较好,属高孔隙度、高渗透率储层;(3)杜813南块兴隆台油层Ⅳ组为水下扇重力流沉积模式,兴Ⅰ~Ⅴ组为湖盆边缘浅水扇三角洲沉积模式,分别发育辫状分流河道微相、分流河口砂坝微相、分流间薄层砂微相和边、心滩微相、分流间洼地等沉积微相类型;(4)确定杜813南块属于薄互层状超稠油底水油藏;(5)重新确定杜813区块的含油面积、有效厚度、孔隙度和含油饱和度等参数,并对其储量进行重新评估;(6)提出了2口有利井位的部署建议,为此区块进一步开发,完善井网,改善注采关系提供了资料基础。
[Abstract]:Block Du813 of Huanxiling area in Liaohe Oilfield has large oil reserves and the characteristics of crude oil fluid are "four high and one low": high density, high viscosity, high freezing point, high pitch resin and low wax content. Since 2002, the planned production of Du813 block in Huanxiling district has experienced steam huff and puff, steam drive and SAGD technology, but the oil well output is decreasing year by year. This is mainly due to the strong internal heterogeneity and poor fluidity of fluid in the reservoir of Dus813 block, which leads to the low efficiency wells, low production degree, large remaining reserves and poor recovery efficiency. Therefore, it is urgent to analyze the sequence, structure, reservoir and distribution of oil and water in this area so as to guide the oil and gas development and adjustment in the next step. In this paper, the reservoir description technique is used to analyze the reservoir of Du813 block in Huanxiling Oilfield, and through sequence stratigraphy and sedimentary equality theory, the sub-layers of Du813 block are divided and contrasted in detail. On the basis of stratification and correlation, the reservoir structure, reservoir conditions and physical properties of crude oil in the study area are studied. Combined with the production mode of oil wells in the study area and the factors affecting productivity, the reservoir reserves evaluation in Block du 813 was reunderstood, the potential area of production was determined and two horizontal wells were proposed to be deployed. The main results are as follows: (1) according to the principle of sequence stratigraphy, the Xinglongtai reservoir in Dun813 block is divided into four reservoirs: Xing 鈪，
本文编号：2183356
[Abstract]:Block Du813 of Huanxiling area in Liaohe Oilfield has large oil reserves and the characteristics of crude oil fluid are "four high and one low": high density, high viscosity, high freezing point, high pitch resin and low wax content. Since 2002, the planned production of Du813 block in Huanxiling district has experienced steam huff and puff, steam drive and SAGD technology, but the oil well output is decreasing year by year. This is mainly due to the strong internal heterogeneity and poor fluidity of fluid in the reservoir of Dus813 block, which leads to the low efficiency wells, low production degree, large remaining reserves and poor recovery efficiency. Therefore, it is urgent to analyze the sequence, structure, reservoir and distribution of oil and water in this area so as to guide the oil and gas development and adjustment in the next step. In this paper, the reservoir description technique is used to analyze the reservoir of Du813 block in Huanxiling Oilfield, and through sequence stratigraphy and sedimentary equality theory, the sub-layers of Du813 block are divided and contrasted in detail. On the basis of stratification and correlation, the reservoir structure, reservoir conditions and physical properties of crude oil in the study area are studied. Combined with the production mode of oil wells in the study area and the factors affecting productivity, the reservoir reserves evaluation in Block du 813 was reunderstood, the potential area of production was determined and two horizontal wells were proposed to be deployed. The main results are as follows: (1) according to the principle of sequence stratigraphy, the Xinglongtai reservoir in Dun813 block is divided into four reservoirs: Xing 鈪，
本文编号：2183356
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