云应地区采盐老腔再利用的可行性

发布时间：2018-11-18 22:19

【摘要】：地下盐岩由于良好的物理力学特性,被公认为是存储石油、天然气最理想的介质,中国利用地下盐岩建设储气库起步较晚,已建成的储气库产能亟需提高。与此同时,中国储气库建设面临建库优质盐矿资源短缺、建库成本高、投产速度慢等问题,而各地盐矿企业采盐形成的地下老腔数量众多,因此利用老腔改建储气库是加快储气库建设投产的有效途径。通过分析云应地区盐层特征和采卤井资料,从盐腔的密封性、稳定性及经济性方面对该地区的老腔进行评价。结果表明:云应地区的盐层埋深较浅,构造平缓,无断层破坏,盖层密封性好。地下老腔数量众多,体积大,顶板厚度大,矿柱宽度大,部分老腔由于井距较小且采用压裂连通开采,存在盐腔连通串层等问题。相比之下,采用水平井对接方式采卤的老腔井距较大,矿柱宽度较为理想且未受压裂破坏,是该地区老腔改造的首选。
[Abstract]:Because of its good physical and mechanical properties, underground salt rock is recognized as the most ideal medium for storing oil and natural gas. The construction of gas storage in China using underground salt rock started relatively late, and the capacity of gas storage that has been built needs to be improved urgently. At the same time, the construction of gas storage in China is faced with the shortage of high-quality salt mining resources, the high cost of building reservoirs and the slow speed of production, etc. The number of underground cavities formed by salt mining enterprises in various places is numerous. Therefore, it is an effective way to speed up the construction and production of gas storage by using the old chamber to rebuild the gas storage. By analyzing the characteristics of salt beds and the data of brine wells in Yunying area, the paper evaluates the old cavities in this area from the aspects of seal, stability and economy of salt cavities. The results show that the salt bed in Yunying area is of shallow buried depth, gentle structure, no fault damage and good sealing of the cap. The old underground cavities have many problems such as large volume, large roof thickness, large pillar width, and some old cavities are connected by salt cavities due to small well spacing and fracturing. In contrast, the old cavity with large spacing, ideal pillar width and no fracturing damage is the first choice for the reconstruction of the old cavity in this area.
【作者单位】：中国石油西气东输管道公司储气库项目部;
【基金】：国家重大科技专项资助项目“地下储气库关键技术研究与应用”,2015E-400801
【分类号】：TE972.2

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