扶余油田东5-9区块扶余油层储层特征研究

发布时间：2018-05-15 12:46

本文选题：储层划分 + 沉积微相　；参考：《东北石油大学》2015年硕士论文

【摘要】：扶余油田经过几十年的注水开发,目前已经进入高含水开发阶段,但在河道砂体内部仍然存在相对富集的剩余油,扶余油田上产的关键途径是提高老油田采收率挖潜这部分剩余油。本研究是利用油田现有生产资料及动静态资料,以沉积岩石学、储层地质学、石油地质等理论基础,以服务扶余油田精细油田开发为宗旨,通过区块地层对比、断层及微构造、沉积微相、测井二次解释、储层分布及非均质性研究,利用油藏描述的研究成果,改善目前的生产状况,更好的解决层间、层内注采矛盾,挖潜剩余油分布特点,达到提高动态储量和采收率的目的。根据扶余油层旋回特征将储层精细划分为四个砂组13个小层(1-13),扶余油田东5-9区块扶余油层主要发育三角洲前缘和三角洲平原两种沉积亚相;水下分流河道、天然堤、河口坝、远沙坝、分流间湾等9种沉积微相。共识别出正向微构造20多处,主要的正微构造多为微高点和微断鼻构造,分布在断堑两侧及东北部的构造高部位,是有利剩余油富集带,这些井区是调整挖潜的有利区带。扶余油层上部1、2.1、2.2、5.1、5.2单层隔层较发育且分布连续性较好;扶余油层下部6.2、7.1隔夹层相对较薄,主要发育夹层;6.2、7.1、9.2、12.1、12.2单层隔夹层相对不发育。扶余油层属于三角洲前缘亚相沉积,其孔隙度、渗透率分布呈现南西—北东方向展布这一特点,主河道的孔隙度、渗透率值高,河道侧翼以及天然堤的孔隙度渗透率低,在扶余油层内部,孔隙度、渗透率值相对较高的单砂体是3、4、5、6、7、9等小层的两期单砂体,其孔隙度均在26%以上,渗透率也多在150毫达西以上。计算出区块地质储量528.07万吨,可采储量161.7万吨,表明研究区具有较高的油气开发潜力。该项研究对于油田合理制定开发调整方案提供理论依据。
[Abstract]:After decades of waterflooding, Fuyu Oilfield has entered the stage of high water cut development, but there are still relatively enriched remaining oil in the channel sand body. The key way of upproduction in Fuyu oilfield is to improve the oil recovery of the old oil field and tap the potential of this part of remaining oil. The purpose of this study is to use the existing production data and dynamic and static data of oil fields, to base on the theory of sedimentary petrology, reservoir geology, petroleum geology, and to develop fine oil fields in Fuyu Oilfield, through block stratigraphic correlation, faults and microstructures. Sedimentary microfacies, logging secondary interpretation, reservoir distribution and heterogeneity studies, using the research results of reservoir description to improve the current production situation, to better solve the interlayer and intra-layer injection-production contradictions, and to exploit the distribution characteristics of residual oil. The purpose of improving dynamic reserves and oil recovery is achieved. According to the characteristics of Fuyu oil reservoir cycle, the reservoir is divided into four sand groups, 13 sub-layers 1-13, Fuyu reservoir in East 5-9 block of Fuyu Oilfield mainly developed delta front and delta plain two kinds of sedimentary subfacies, underwater distributary channel, natural dike, estuarine dam, There are 9 kinds of sedimentary microfacies, such as far sand dam, distributary bay and so on. More than 20 positive microstructures have been identified. The main positive microstructures are mainly micro-high points and micro-faulted nose structures. They are located on both sides of the fault graben and in the high positions of the structure in the northeast of the fault. They are favorable remaining oil enrichment zones. These well areas are favorable zones for adjusting and tapping potential. The upper layer of Fuyu oil layer is 1 / 2. 1 / 2 / 2 / 2 / 2 / 2 / 1 / 5. 2 monolayer and the distribution continuity is good, and the lower part of Fuyu oil layer is relatively thin with 6. 2 / 7. 1 / 9. 1 / 9. 2 / 12. 2 / 12. 2 / 12. 2 single layer intercalation, which is relatively undeveloped in the lower part of Fuyu oil reservoir. Fuyu oil layer belongs to delta front subfacies deposition, and its porosity and permeability distribution show the characteristics of south, west and north east. The porosity and permeability of the main channel are high, and the porosity permeability of the flank and natural embankment is low. In Fuyu reservoir, the single sand body with relatively high porosity and permeability is a single sand body in three stages, such as 3 / 4 / 5 / 5 / 6 / 6 / 7 / 9 and so on. The porosity is above 26% and the permeability is more than 150 mdaci. The results show that the single sand body with relatively high porosity and permeability is a single sand body with a porosity of more than 26% and a permeability of more than 150 mdassi. The geological reserves and recoverable reserves of the block are 5.2807 million tons and 1.617 million tons respectively, which indicates that the study area has a high potential for oil and gas development. This study provides a theoretical basis for rational formulation of development adjustment scheme in oil fields.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

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