中国石油网消息：面对边底水稠油油藏长期高含水、低速低效生产的开发难题，大港油田通过技术创新与攻关，成功应用天然气吞吐技术，为稠油高效开发探索出一条新路径。截至5月31日，今年累计增油7600吨。

China Oil News: In the face of the long-term high water cut and low-efficiency production problem in heavy oil reservoirs with bottom water, Dagang Oilfield successfully applied the natural gas injection and production technology through technological innovation and research efforts, thus exploring a new path for the efficient development of heavy oil. As of May 31st, this year, the cumulative oil production has increased by 7,600 tons.

稠油黏度高、流动性差，加之边底水活跃，导致油井投产后含水率快速升高，陷入“采出液多、采出油少”的困境。针对这一问题，大港油田曾尝试应用二氧化碳吞吐技术提升开发效果。然而，二氧化碳对井筒和地面集输系统具有腐蚀性，限制了其大规模推广应用。

The heavy oil has high viscosity and poor fluidity, and the active edge and bottom water further aggravates the situation, causing the water content in the oil wells to increase rapidly after they are put into production, leading to a predicament of "excessive produced fluid but insufficient produced oil". To address this issue, Dahang Oilfield once attempted to apply the carbon dioxide flooding technology to enhance the development effect. However, carbon dioxide is corrosive to the wellbore and the ground gathering and transportation system, which limits its large-scale application.

随后，科研人员将目光转向了与原油相容性更好的天然气。借鉴吐哈油田的成功经验，并基于天然气同样具备溶解降黏、改善流度比的机理认识，大港油田先后在唐家河油田和板桥油田2个井组开展天然气吞吐先导试验。

Subsequently, the researchers turned their attention to natural gas, which has better compatibility with crude oil. Drawing on the successful experience of the Tuha Oilfield and based on the understanding that natural gas also has the mechanism of dissolving and reducing viscosity as well as improving flow ratio, the Dagang Oilfield successively conducted pilot tests of natural gas pumping in two well groups, namely the Tangjiahe Oilfield and the Bangqiao Oilfield.

唐家河油田港508-31井自实施天然气吞吐以来，连续稳产增油超过230天，累计增油3481吨。数据显示，该井综合含水率由初期的92%降至25%，日增油峰值一度达到41吨。与此同时，板桥油田的同类试验也取得积极进展，其受益井日增油量达10吨。

Since the implementation of natural gas transportation in Well 508-31 of Tangjiahe Oilfield, it has maintained stable production and increased oil output continuously for over 230 days, with a total increase of 3,481 tons of oil. The data shows that the overall water content of this well has decreased from 92% initially to 25%, and the peak daily oil production once reached 41 tons. At the same time, similar experiments in Bangqiao Oilfield have also made positive progress, with the daily oil production increase of the benefited wells reaching 10 tons.

为实现该技术的有效推广，大港油田科研团队同步深化理论研究，明确了天然气吞吐在注气、焖井、回采3个阶段的增产机理。针对现场实施中存在的气窜等关键难题，技术人员创新采用“段塞式”注气与“温和开采”策略，通过精细调控有效提高了驱油效率。

To achieve the effective promotion of this technology, the research team of Dagang Oilfield simultaneously deepened theoretical research and clarified the production enhancement mechanisms of gas transportation in the three stages of gas injection, well sealing and recovery. In response to key problems such as gas migration encountered during on-site implementation, the technicians innovatively adopted the "segmented" gas injection and "moderate exploitation" strategies, effectively improving the oil displacement efficiency through precise control.

目前，大港油田已形成涵盖选井标准、注采参数优化、井筒及地面配套工艺等6个环节的完整技术体系，规模应用该技术后可使采收率提高5个百分点。

At present, Dagang Oilfield has established a complete technical system covering six aspects including well selection criteria, optimization of injection and production parameters, and wellbore and surface supporting processes. The application of this technology on a large scale can increase the recovery rate by 5 percentage points.