一口井，激活一片网。8月20日，在吉林油田黑46区块，情1-2井由采油井转为注气井5年来，让周边6口油井重拾活力，平均日产油量由0.8吨攀升至1.5吨。

One well, activating an entire network. On August 20th, in the Black 46 block of Jilin Oilfield, the Qing1-2 well, which had previously been a production well, was transformed into an injection well. Over the past five years, this change has revitalized six surrounding oil wells, with the average daily oil production increasing from 0.8 tons to 1.5 tons.

这一变化的背后，是吉林油田在CCUS-EOR项目中推行的换向驱油新技术——通过油井、水井、气井的灵活互转，让沉寂多年的老采油区重获新生。

Behind this change lies the innovative technology of alternate oil displacement adopted by Jilin Oilfield in the CCUS-EOR project - by flexibly switching between oil wells, water wells and gas wells, the long-dormant old oil-producing areas have been rejuvenated.

井别互换——创新注采开发体系

Well interchange - Innovative injection-production development system

长期以来，“油井采油、水井注水、气井注气”的固化认知，严格限定了各类油井设备功能，严重制约了吉林油田老油藏的剩余潜力挖掘。

For a long time, the fixed perception of "oil wells extracting oil, water wells injecting water, and gas wells injecting gas" has strictly defined the functions of various oil well equipment, severely restricting the exploration of the remaining potential of the old oil reservoirs in Jilin Oilfield.

为破解开发难题、盘活效益空间，吉林油田二氧化碳开发公司率先突破传统思维，在问题尤为突出的大情字井油田推行油井、水井、气井互通转换的换向驱油新技术，打破三类井别“各司其职、不可跨界”的开发壁垒，通过重构差异化井网、精准优化注采参数、配套水气协同驱替工艺，盘活存量井网资源，深度挖掘老油藏剩余油潜力。

To solve development problems and expand the potential for economic benefits, the Carbon Dioxide Development Company of Jilin Oilfield took the lead in breaking through traditional thinking. They implemented a new technology of interconnecting and converting oil wells, water wells and gas wells in the Daqingzi Oilfield, where problems were particularly prominent. This technology broke the development barriers where each type of well (oil, water, and gas wells) had its own specific functions and could not cross boundaries. By reconfiguring the differentiated well network, precisely optimizing injection and production parameters, and adopting water and gas co-draining processes, they revitalized the resources of the existing well network and deeply explored the remaining oil potential of the old oil reservoirs.

根据开发规划，在大情字井油田黑46区块、黑72区块，吉林油田二氧化碳开发公司累计部署了新钻及改造井256口，其中油井193口、气井63口，涵盖老油井水气交替驱改造、注水井转采油井、常规油井及水井转注气井等多元改造类型。此次系统性井别调整，是基于储层展布、剩余油分布、驱替方向的精准把控，是适配老油藏开发规律的科学化、规模化布局。

According to the development plan, in the Black 46 and Black 72 blocks of the Dagexi Oilfield, the Jilin Oilfield Carbon Dioxide Development Company has cumulatively deployed 256 new drilling and renovation wells, including 193 oil wells and 63 gas wells. These cover various types of renovations such as water-gas alternating drive renovation of old oil wells, conversion of injection wells to production wells, and transformation of conventional oil wells to injection gas wells. This systematic adjustment of well types is based on precise control of reservoir distribution, remaining oil distribution, and displacement direction, and is a scientific and large-scale layout adapted to the development laws of old oil reservoirs.

随着井网优化调整落地，两大区块双重驱替赋能成效凸显。黑46区块形成72注165采的规模化注采体系，采收率提高19.3个百分点。黑72区块由原有8注32采调整为11注29采，采收率提升18.4个百分点。

With the implementation of well pattern optimization and adjustment, the dual displacement capabilities of the two blocks have shown remarkable results. In the Hekai 46 block, a large-scale injection-production system of 72 injections and 165 productions has been established, resulting in a 19.3 percentage point increase in recovery rate. In the Hekai 72 block, the original injection-production ratio of 8 to 32 has been adjusted to 11 to 29, leading to a 18.4 percentage point increase in recovery rate.

差异化定制——分区施策精准赋能

Differentiated customization - targeted measures for precise empowerment

油井、水井、气井灵活互转，表面是井别功能的简单调换，背后却是吉林油田二氧化碳开发公司技术团队对油藏地质特征、油水气运动规律、剩余油分布特点的精准研判与科学规划。

Oil wells, water wells and gas wells can be flexibly converted among each other. On the surface, it seems to be a simple switch of well types. However, behind this lies the precise analysis and scientific planning of the technical team of Jilin Oilfield Carbon Dioxide Development Company regarding the geological characteristics of the oil reservoir, the movement laws of oil, water and gas, and the distribution characteristics of remaining oil.

秉持“有依据、有效果、有效益”的优化原则，技术团队针对不同区块、不同井区的储层发育状况、井况条件及开发成效差异，定制差异化井网优化方案，实现精准施策、靶向开发。

Adhering to the optimization principle of "based on evidence, effective results, and high benefits", the technical team has customized differentiated well pattern optimization plans based on the reservoir development conditions, well conditions, and development effectiveness differences of different blocks and well areas, achieving precise measures and targeted development.

针对黑46区块，技术团队以区域资源禀赋为依据，将其划分为黑46北部、黑46南部两个井区，分别制定差异化的井网优化方案。黑46南部的优质资源区采用转注顺砂体五点井网模式，黑46北部低丰度区采用灵活适配的线性井网模式。

For the Black 46 block, the technical team based on the regional resource endowment, divided it into two well areas: the northern part of Black 46 and the southern part. They respectively formulated differentiated well pattern optimization plans. The high-quality resource area in the southern part of Black 46 adopted the five-point well pattern with transverse injection for sand body alignment, while the low-abundance area in the northern part of Black 46 adopted a flexible and adaptable linear well pattern.

在面临同样困局的黑72区块，技术团队借鉴新区的成熟开发技术，应用转注反七点井网模式，全方位适配不同区块的油藏开发需求。

In the black 72 block, which faced the same predicament, the technical team drew on the mature development technologies of the new area and applied the transposition reverse seven-point well pattern, fully adapting to the oil reservoir development needs of different blocks.

在注入工艺上，技术团队依托长岩芯室内实验成果，创新采用水气交替注入方式。相比传统连续的注气方式，水气交替注入方式的驱油效率提升了7%，既能最大程度扩大驱替波及体积，又能有效遏制气窜问题。同时，通过精准调控二氧化碳日注量，稳步恢复地层压力，从而满足混相驱开发的要求。改造后，黑46区块的地层压力从初期14.6兆帕提升至最高19兆帕，为高效驱油、产能提升奠定了坚实基础。

In terms of injection technology, the technical team relied on the results of long core laboratory experiments and innovatively adopted a water-gas alternate injection method. Compared with the traditional continuous gas injection method, the water-gas alternate injection method has increased the oil displacement efficiency by 7%. It can not only maximize the swept volume of the displacement wave but also effectively prevent gas migration problems. At the same time, by precisely controlling the daily injection volume of carbon dioxide, the formation pressure was steadily restored, thus meeting the requirements of mixed-phase displacement development. After the transformation, the formation pressure in the Hek46 block increased from the initial 14.6 megapascals to the maximum 19 megapascals, laying a solid foundation for efficient oil displacement and capacity improvement.

从单井到井网——构建绿色生产新格局

From individual wells to well patterns - Building a new green production landscape

换向驱油新技术的落地应用，彻底打破了吉林油田传统固化的井别开发模式。通过井体功能动态互换、多轮次参数调整、水气协同驱替、碳驱补能增效等系列配套工艺，有效激活老油藏深部剩余油潜力，推动老油田迈入二次高效开发新阶段，规模化提质增效成果持续释放。

The implementation of the new technology for reversing oil drainage has completely broken the traditional and rigid well-type development model of Jilin Oilfield. Through a series of supporting processes such as dynamic interchange of well body functions, multiple rounds of parameter adjustments, water and gas co-displacement, and carbon injection for supplementary energy and efficiency enhancement, the potential of residual oil in the deep layers of old oil reservoirs has been effectively activated. This has pushed old oilfields into a new stage of secondary efficient development, and the results of large-scale quality improvement and efficiency enhancement have been continuously released.

多项现场试验验证：井别互换改造，能够精准贴合砂体沉积规律与油藏渗流特征，有效改善地下驱替流线分布，充分释放存量井网资源价值。

Multiple on-site tests have verified that the interchange of well types can precisely conform to the sedimentation patterns of sand bodies and the permeability characteristics of oil reservoirs, effectively improving the distribution of underground displacement flow lines, and fully releasing the value of the existing well network resources.

更具突破意义的是，转换井在长期生产、注水、注气开发后，技术团队还可根据油藏动态变化开展二次、多次井别优化转换，以低成本、少新井、高复用的开发模式，持续释放老油田的开发潜力，最大化提升整体开发效益。

What is even more groundbreaking is that after the conversion wells have been used in long-term production, water injection, and gas injection development, the technical team can also conduct secondary and multiple well-type optimization conversions based on the dynamic changes of the oil reservoir. By adopting a development model of low cost, fewer new wells, and high reuse rate, the potential of the old oilfield can be continuously released, and the overall development efficiency can be maximized.

目前，大情字井油田已成为换向驱油技术的核心示范区，“水驱+碳驱”复合开发模式持续推广，CCUS-EOR项目规模化、绿色化开发格局逐步成形。按照开发规划，到“十五五”末期，CCUS-EOR项目在黑46区块、黑72区块全面建成投用后，大情字井油田年二氧化碳注入量将突破100万吨，地层补能与驱替改造能力实现跨越式提升。

At present, the Dagongziying Oilfield has become the core demonstration area for the alternate oil recovery technology. The "water flooding + carbon flooding" composite development model has been continuously promoted, and the large-scale and green development pattern of the CCUS-EOR project is gradually taking shape. According to the development plan, by the end of the "14th Five-Year Plan" period, after the CCUS-EOR projects are fully completed and put into operation in the Hek46 block and Hek72 block, the annual carbon dioxide injection volume of the Dagongziying Oilfield will exceed 1 million tons, and the capacity for replenishment and displacement modification of the formation will achieve a leapfrog improvement.

从一口井的“角色转换”到整片井网的“功能重塑”，这场始于井别互换的变革，折射出吉林油田开发思维的系统跃迁：“碳驱”与“水驱”的协同发力，使大情字井油田既成为增产提效的“试验田”，也化身碳封存利用的“先行区”，为老油田稳产增效、规模化推进碳驱开发、构建绿色油气生产体系注入持久动力。

From the "role transformation" of a single well to the "functional reshaping" of the entire well network, this transformation that began with the exchange of well types reflects the systematic leap in the development thinking of Jilin Oilfield: The synergy of "carbon injection" and "water injection" has made the Dagongzi Oilfield not only a "test field" for increasing production and improving efficiency, but also a "pioneer zone" for carbon sequestration and utilization, injecting lasting momentum for the stable production and efficiency improvement of old oilfields, the large-scale promotion of carbon injection development, and the construction of a green oil and gas production system.