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来源:百度文库 编辑:高校问答 时间:2024/05/03 21:06:54
本文结合五台油田的油藏类型、开发历史和开发现状,从地质条件和开发特点出发,系统分析储层非均质性、润湿性、韵律性砂岩不同部位注水开发及注采井数比等因素对水驱效率的影响。
应用精细地质描述、新井多功能解释、注入产出剖面分析、动态资料统计及油藏数值模拟等多种方法对不同类型油藏进行了剩余油分布研究,对各类油藏下一步提高采收率的潜力和挖潜方向进行了分析评价,提出了细分开发调整、周期注水、堵水调剖、加密调整等提高油藏水驱采收率的配套技术方法。
尤其是针对五台油田广泛发育构造复杂、油层多、层间差异大、储量丰度高的复杂断块油藏,该类油藏由于构造复杂、沉积类型多样,对油藏地质体的认识难以一次到位,开发初期层系往往划分较粗,随着开发时间延长,层间层内矛盾日益突出,相对中低渗透层段吸水能力差,潜力得不到发挥。针对这一开发矛盾,研究了渗透率、主力层数、油层厚度、原油性质等参数对层间干扰的影响,开展了层状断块油藏高含水期细分开发可行性研究。在此基础上从渗透率级差、主力油层数、原油性质差异、含油面积与地质储量等方面开展了开发层系划分标准的研究,形成了多油层复杂断块油藏高含水期细分开发层系、提高水驱采收率的配套开发技术。先后在辛47、辛50等断块进行了细分开发调整的探索和实践,取得了显著效果,其中典型单元辛47断块采收率从36%提高到40%,增加可采储量30x104t。

关键词 采收率,细分开发,间歇注水,加密调整

The combination of 5 fields oil deposit types, the development of history and the development of the status quo, from the geological conditions and development features, non-homogeneous reservoir analysis, material nature, remote parts of stones of different development and water injection wells Note a few factors than water-efficient. Applications sophisticated geological description, the new wells multifunctional interpretation, inject output profile analysis, statistical information and dynamic oil deposit numerical simulation and other methods to the different types of oil deposit in the distribution of remaining oil study for the various kinds of oil deposit next raise recoveries potential and existing direction analysed evaluation made by the development of adjustment, the injection cycle, Dushui-mortem, encryption adjustment increase oil deposit water-recoveries matching techniques. Especially against Wutai oilfield broad developmental complexity, reservoir number, level differences between large, reserves abundance high complex started oil deposit, such as oil deposit Construction complex, sediment diverse types of oil deposit geology body awareness is a place to develop the initial layer is often divided rather, with the development of the extension of time, a layer within layer have become increasingly prominent. relatively low penetration levels of absorbent capacity of the poor, not the potential to play. In view of this development contradictions studied penetration, the main storeys, reservoir thickness, the nature of the crude oil layer parameters for the interference between the effects of high oil deposit for the wet period stand started a feasibility study into the development. On this basis the penetration rate differentials, the major oil storeys, crude character differences, oil-bearing geological reserves in the area and launched the development of criteria for the classification level of research and to the formation of a multi-reservoir complex started oil deposit breakdown of the high level of wet period, increasing water-recoveries supporting development of technology. Held in Sim 47, Sim 50, started a breakdown of the adjustment of exploration and practice, has achieved remarkable results, which typically modules Sim 47 blocks recoveries from 36% to 40%, additional recoverable reserves 30x104t.
Keywords: recoveries, broken down development, intermittent water injection, encryption adjustment

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This text combines five oil reservoir types of oil field, develops history and developing the current situation , proceed from geological condition and characteristic of developing , network analysis does not store layer quality , wetting , metre in verse sandstone different position water flooding development and note and quarry the influence that the well count and drive efficiency to water more than ,etc. the factor.
Use meticulous geology to describe, the new well is explained multi-functionally, pouring into many kinds of methods , such as output section analysing , dynamic statistics and oil reservoir numerical simulation ,etc. will distribute and study the surplus oil to the different kinds of oil reservoirs, analyse that to all kinds of to improve the potentiality of the recovery ratio and tap the latent power in the direction next in the oil reservoir, have put forward and subdivided and developed the water flooding of adjustment , cycle, stopped up water and adjusted and cut open, encrypted and adjusted etc. and improved the method of ability to supply the necessary technology of driving the recovery ratio of water of oil reservoir.
Direct five oil field extensive development structure complicated , oil reservoir many , widely different , reserves abundant degrees of high complicated disconnected oil reservoirs under layer against especially, the oil reservoir because structure complicated, various to deposit type, it is difficult for understanding of geological body of oil reservoir not to put in order to once in place, it is relatively crude to develop and often divide in one layer of departments in initial stage , lengthen with construction period, the contradictions are conspicuous day by day in layer among layer, as to in permeate by section by layer not absorbing water because ability the bad, give play to potentiality. To this development contradiction, the influence to interfering of the parameter among layer , such as research penetrance , main force one layer of counting , thickness of oil reservoir , crude oil nature ,etc., subdivide feasibility research of developing after launching the disconnected high moisture one of oil reservoirs of layers of form. Have launched one layer of research that department divides the standard of developing from the respects , such as penetrance differential , main oil reservoir counting , crude oil nature difference , including the area of oil and geological reserves ,etc. on this basis, have formed much complicated broken high moisture one of oil reservoirs of oil reservoir and subdivided and developed one layer of departments , complete network of improving water to drive the recovery ratio to develop technology. Successively hard 47, hard 50,etc. broke one and subdivided the exploration and practice which developed adjustment , having made the remarkable result, the typical peppery disconnected recovery ratios of 47 of Entrance rise to 40% from 36% among them, increase recoverable reserves 30x104t.

The recovery ratio of the keyword, subdivide and develop , the water flooding of the intermittence , encrypt and change