摘要
盐家砂砾岩位于东营凹陷北部陡坡带,含油层系沙三、沙四段。1960年发现永1以来,砂砾岩探明含油面积11.6平方千米,地质储量2232万吨,目前占整个东辛油区探明地质储量的5.5%。砾岩油田在世界上为数不多,在我国的分布也比较稀少。位于永北地区盐家油田的砂砾岩油藏,有着很多自身的地质特点和流体特性,有必要开展一系列有针对性的研究工作。
砾岩油藏一般具有储层特征复杂,井间连通状况复杂,油井无水采油期短,油井产量递减率高等一系列的问题。本文从地质综合研究出发,在积极探索砂砾岩期次划分、对比和储层预测方法的基础之上,开展砂砾岩油藏注水先导试验及工艺配套技术优化研究,初步形成了适合盐家砂砾岩油藏储层特征研究的技术手段。本文在总结盐家砂砾岩油藏开发的一般性规律同时,系统研究了盐家油田砂砾岩油藏储层特性和流体特征,优选了井网部署方案和优化施工参数,明确了盐家砂砾岩油藏各开发指标的相互关系,同时为配合砂砾岩注水工作的顺利实施,确定了砂砾岩体井间连通验证技术系列,研究了盐家砂砾岩储层敏感性特征,明确了盐家砂砾岩油藏开发一系列的技术界限。
在上述基础理论研究的支撑之下,本文还给出了盐家砂砾岩油藏新区开发方案的一个具体实例,进一步阐述了在矿场实际情况下,运用油藏工程方法解决现实问题的注意事项。
针对盐家砂砾岩油藏新区方案的精细研究和模式确定,有着重要的研究和推广价值,必将为盐家砂砾岩一系列新探明区块的高效开发奠定基础,同时也会对其他地区砂砾岩油藏的开发研究提供有益的借鉴和帮助。
Yanjia Glutenite Reservoir, in steep slope zone of northern Dongying depression and main oil bearing formation is ES3-ES4. From 1960 to now, explored glutenite reserves area 11.6 km2, over 0.1 billion cubic meters, and it is 5.5% of the explored reserves of Dongxin. Not far more the gultenite reservoir is living in the world,and the situation is echoed in China. Yanjia glutenite reservoir has many special characteristics of geologic and fluid, it would really be necessary to do a great deal of experimentation and study.
General glutenite reservoir have the following problem: complex inner reservoirs, complex interwell connectivity, water-free production period is short, production decline rate is high etc. This word based on the integrated geology research(the division of accumulation stage of glutenite reservoir, reservoir prediction method etc.), discussing the method of pilot test of water injection in glutenite reservoir and optimization research of matching technology, a series of technical means of glutenite reservoir has formed tentatively. At the same time, this word study the special characteristics of geologic and fluid, optimize the parameters of well pattern and processing, study the relationship of development indexes of glutenite reservoir. Reservoir sensitivity of Yanjia glutenite reservoir, threshold of exploitation of Yanjia glutenite reservoir, verification method of interwell connectivity are discussed in this word, too.
Combining practice with theory, this word show a instance which is a new area development project of Yanjia glutenite reservoir. The instance show the points for attention in practical application.
It has important value of studies and popularizing that the pattern and the fine study of Yanjia gultenite reservoir new area deveplopment project. It will lay the groundwork for efficient development of a series of glutenite reservoir of Yanjia oil-field. It will offer help and referrence for the glutenite reservoir of other areas.
引文
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