致密储层大规模压裂试验开发效果分析

发布时间：2018-06-24 17:51

本文选题：致密储层 + 大规模压裂　；参考：《特种油气藏》2017年04期

【摘要】：为了解决致密储层在开发中存在的注水井吸水能力低、油井单井产量低、递减快等问题,在海拉尔盆地B油田优选12口油井,开展了多层段大规模压裂技术试验。该技术通过扩大裂缝与油藏的接触面积,增大井筒与地层的连通能力,提高压裂效果。试验结果表明:通过可降解纤维网络加砂工艺,优选陶粒和覆膜砂作为支撑剂,滑溜水为前置液,冻胶为携砂液,能够形成3~4条分支缝,波及体积是常规压裂的3~5倍;大规模压裂后,油井产液层数比例、产液厚度比例和产量等均有较大幅度的提高;周边注水井的吸水量和视吸水指数增加,开发状况得到明显改善;单井控制储量、单层厚度大于2 m的储层所占比例、储层物性、地层能量保持水平以及压裂施工规模等对大规模压裂技术的增产影响较大。该研究成果对实现海拉尔油田及其他类似油田的高产、稳产具有十分重要的意义。
[Abstract]:In order to solve the problems of low water absorption capacity of water injection wells, low production rate of single well and fast decline of oil wells in the development of tight reservoir, 12 wells were selected in the B Oilfield of Hailaer Basin, and large-scale fracturing technology tests were carried out. By expanding the contact area between fracture and reservoir, the technology can increase the ability of connecting well bore and formation, and improve the fracturing effect. The experimental results show that through the technology of adding sand with degradable fiber network, ceramic and coated sand are selected as proppant, slippery water is used as precursor liquid, and gel is used as sand carrying fluid, 3n 4 branching fractures can be formed, and the sweep volume is 3 ~ 5 times that of conventional fracturing. After large-scale fracturing, the ratio of production layers, thickness and thickness of oil wells have been greatly increased, the water absorption and apparent water absorption index of surrounding injection wells have been increased, the development situation has been obviously improved, and the control reserves of single wells have been greatly improved. The proportion of single-layer reservoir with thickness more than 2 m, the physical property of reservoir, the level of formation energy maintenance and the scale of fracturing operation have great influence on the production increase of large-scale fracturing technology. The research results are of great significance to achieve high and stable production in Hailaer Oilfield and other similar oilfields.
【作者单位】：中国石油大庆油田有限责任公司;
【基金】：国家自然科学基金“致密油储层提高采收率关键理论与方法研究”(51334007)
【分类号】：TE357

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