【作者】 肖伟；

【导师】 曲志浩；

【作者基本信息】 西北大学 ， 矿产资源普查与勘探， 2001， 硕士

【摘要】 本文以蒙古林砾岩油藏为例，全文共分为五个章节，主要研究了该油藏的储层特征和剩余油分布两个方面的内容。具体研究了该油田的岩矿特征；储层微观孔隙结构；储层四性关系，即：电性与岩性、岩性与物性、物性与含油性、电性与含油性，建立了孔隙度、渗透率解释图版；储层宏观非均质性，并针对该油田底水锥进的特点，详细研究了该油田的隔、夹层的分布及其对油水运动的影响；油藏水淹特征，最后研究了该油田剩余油的分布规律，圈定了剩余油的分布范围。 在参考前人研究成果的基础上，经过对研究区地质资料的分析和大量的室内研究，本文得出了以下几点主要结论：1．蒙古林砾岩油藏岩矿特征具“两低”的特点，即成分成熟度低，结构成熟度低。2．储层孔隙以次生孔隙为主，原生孔隙较少；束缚水饱和度高，无水采收率低， 但最终采收率高。3．储层孔隙度与声波时差、渗透率与自然电位之间均具有良好的相关性。该储层 可划分为中孔、低渗孔隙型储集层。孔隙度变化不大，而渗透率差异明显，其 分布与小层层位、岩石结构类型、储层沉积微相等因素有关。4．该油田隔、夹层的分布明显受沉积微相的控制，从A5小层到A7小层，其发育 成度、稳定成度和连通程度依此增强。5．储层严重的层间、层内、平面、微观非均质性是影响注水开发效果的主要因素； 平面上油水运动规律受沉积相带的控制；剖面上水洗状况及不均匀；大量的高 渗透结构与构造导致不少油井水窜、水淹；水淹特征除受沉积微相、渗透率影 响外，还与开采方式有关。6．剩余油的分布纵向上主要集中于油层的上部，平面上集中于锥间带及隔、夹层 发育区，此外受断层牵引的构造高部位以及受沉积微相影响的弱水淹区也是剩 余油集中分布的地方。更多还原

【Abstract】 This thesis is consisted of five chapters based on the Menggulin conglomerate oil reserves, two major parts are emphasized: reservoir characteristic and residual oil distribution. It includes these follows: Lithology and mineral feature; Reservoir microstructure; Reservoir four physical characteristics: electrical property.. lithology characteristic., physical feature.. oil signatures at last the interpretation chart is established; Reservoir macroscopic heterogeneity and it’s effect on waterflooding; Distribution of intermediate layer and barrier, and it’s effect on the migration of oil and water; Waterfiooded property. At last the regularity and scope of remaining reserves are studied in detail. According to the results of predecessors and the above mentioned, the major conclusions are presented as followed I. Lithology and mineral feature may be low ingredient and structure maturity. 2. Reservoir have more induced and less primary pore; though the high saturation of irreducible water and the low breakthrough oil recovery factor, the ultimate production factor is high. 3. There is the fine correlativity between porosity and interval transit time, permeability and natural potential. The permeability is more changeable than porosity, and they are controlled by the substratum level, rock texture~ sedimentary environment The reservoir can be described as the middle-porosity low-permeability. 4. The distribution of intermediate layer and barrier is controlled by sedimentary environment obviously. And the level of development, the stability and the connectivity is enhanced gradually from AS to A7. 5. The main factors that affect the water injection efficiency may be the great heterogeneity. In plane, the oil-water migration is controlled by sedimentary environment; in cross section, water wash is non-uniformity. The preferential path and some structure can induce water breakthrough and waterfiooding. The waterflooded characteristic is decided by sedimentary environment permeability and recovery scheme. 6. In profile section, the remaining oil is located in up oil reservoir; in planet in the cone areas.. the zones of barrier and intermediate layer.. the high place dragged by structure and the poor waterfiooded areas controlled by sedimentary enviromnent.更多还原