聚合物驱在渤海油田的应用C+E.docVIP

Application of EOR Technology by Means of Polymer Flooding in Bohai Oil Fields 在渤海油田以聚合物驱提高采收率技术的应用Abstract Enhanced oil recovery by means of polymer flooding is considered as an important technology for the strategic development of offshore oilfields in China. The implementation of polymer flooding in the offshore oilfields requires overcoming several major technical problems caused largely by the absence of a fresh water source and limited space on the platform. A pilot test of polymer flooding was conducted in SZ36-1 Oilfield located in Bohai Bay, China. The problems mentioned above were solved through the development of (1) a hydrophobically associating polymer tolerant to salts in the brine and produced water and (2) a portable automatic injection unit. The significant incremental oil and decrement of water cut were observed after 8 months of polymer injection. The successful implementation of polymer flooding makes three breakthroughs: (1) the first polymer flooding pilot test in offshore oilfields in China; (2) initial application of a hydrophobically associating polymer as the driving agent in the field; (3) significant increment of oil in the trail of a single well injection of polymer. The practice illustrates the feasibility of polymer flooding under current production conditions of offshore oilfields that lead to applications in a larger scale. 摘要 对中国近海油田发展战略而言，以聚合物驱提高原油采收率技术被视为一个重要的技术。在海上油田实施聚合物驱需要克服几个主要技术问题，主要是由于缺乏新鲜水资源和平台上有限的空间。在位于中国渤海湾的SZ36-1油田进行了聚合物驱试点测试。通过（1）疏水缔合聚合物在盐水中的耐盐性和产出水和（2）便携式自动注射装置的发展，解决上述问题。聚合物注入8个月后，观察到了显着的增油和含水率的降低。聚合物驱的成功实施，成就三个突破：（1）首次在中国海上油田聚合物驱油试点测试;（2）疏水缔合聚合物作为驱油剂在该油田初次应用：（3）在单井注入聚合物后跟踪，明显的石油增量。实践证明了当前的海上油田生产条件下的可行性，这将导致大范围应用。 Introduction There are about 20 offshore oilfields in Bohai Bay, which are referred to Bohai Oilfields[1], in which 70% crude oil with viscosity ranged from 50 mPa·s to 150 mPa·s. Water flooding is the dominant technique for the development of viscous oil in Bohai Bay. The problem is that the oil recovery by