深层特稠油复合防砂技术研究与实践

辽河油田洼38块边部难采储量区块具有油层埋深大、井段长、层多层薄、泥质含量高等特点,因出砂严重导致油井频繁砂卡检泵、储量无法有效动用等问题日益严重。为此,提出了压裂防砂+筛管防砂的复合防砂技术思路,形成了树脂覆膜砂、高黏携砂液体系、烧结滤网筛管以及高砂比充填系列工艺技术,防砂有效率由35%提高至90%以上,彻底解决了区块严重出砂的难题,有效改善了区块开发效果。该技术实现了深层特稠油油藏的整体有效动用和经济合理开发,在技术上拓宽了高压挤注类防砂工艺的应用界限,可为同类油藏的开采提供技术借鉴。

Research and Practice of Composite Sand Control Technology for Extra-heavy Oil in Deep Reservoirs

The marginal reserves of Wa 38 block in Liaohe Oilfield are difficult to exploit, and they are featured by large buried depth, long well section, multiple layers, thin layers, and high shale content. The serious sand production in these oil reservoirs has led to frequent sand sticking and pump inspections in oil wells, and the inefficient use of reserves has become increasingly serious. For this reason, a composite sand control technology idea offracturing sand control + screen sand control was put forward, forming series technologies such as resin coated sand, high-viscosity sand-carrying liquid system, sintered strainer screen, and high-sand ratio filling. The sand control efficiency has increased from 35% to more than 90%, the problem of serious sand production in the block has been solved completely, and the development effect has been improved dramatically. This technology realizes the overall efficient use of extra-heavy oil reservoirs as well as reasonable and economic development of the oilfield. This technology technically broadens the application limits of high-pressure squeeze-injection sand control technology, which can provide a technical reference for the development of similar reservoirs.