克拉玛依油田五2西克上组油藏地层对比及沉积微相研究参考.doc

论文题目 克拉玛依油田五2西克组沉积微相研究 摘 要 克拉玛依油田五2西克上组油藏在进入中高含水期后水驱状况变差，含水上升加快，层间、平面矛盾突出，开发效果变差，挖潜稳产难度大。严重的储层非均质性是五2西克上组低渗油藏水窜严重和采出速度低的主要原因。通过开展小层细分对比及沉积微相研究油气开发中重要的基础工作主要利用野外储层露头模式、现代沉积类比法、测井相进行研究2西克上组属于扇三角洲沉积体系，S52为扇三角洲内前缘亚相沉积，主要发育水下分流河道微相沉积；S51为扇三角洲外前缘亚相沉积，主要发育水下分流浅河道、滩、坝微相沉积；S4、S3、S22均为扇三角洲外前缘亚相沉积，以席状砂、坝微相沉积为主；S21为扇三角洲内前缘亚相沉积；S1为扇三角洲平原亚相沉积。可进一步细分为3种亚相10种微相。在此基础上开展了流动单元研究及剩余储量潜力研究，针对不同沉积相带中砂体展布规律，采取不同增产措施，有效指导了综合治理方案的实施，取得了较好增产效果。 关键词： 克上组油藏；地层划分与对比；沉积微相；扇三角洲 Abstract After entering in middle to high water cut stage， the condition of water drive with the Group T21 reservoir in 52Xi of karamay oilfield becomes worse，accelerated rise in water，the contradiction between layer and plane are obvious，the development effect become worse，and it is difficult to tap the potential and to stable production. The main reason to a serious water channeling and adopt a lower speed is that significant reservoir heterogeneity of the low permeability of the Group T21 reservoir of 52Xi. Through a small layer of contrast and sedimentary microfacies studies to dissect the spatial distribution of a single sand body and to take various measures to mediate the contradiction between layer and plane, which have been an very important foundation work in developing oil and gas. According to the theory of sequence stratigraphy, this project mainly use such as wild reservoir’s outcrop pattern, modern deposition analogy and logging plan to establish a sophisticated statigraphy framework of the region. The Group T21 reservoir of 52Xi in this region can be divided into five sand groups, and ten sand layers, and can be further divided into 12 single sand. Based on drilling coring and much of electrical measurement research data, and researched with the development of dynamic and static data, the Group T21 reservoir of 52Xi are on the Fan-delta depositional system, S52 is Fan-fan delta in front subfacies deposition, mainly developed underwater distributary channel micro-facies deposits; S51 is Fan-fan de