中国石油网消息：长庆油田在陇东山156主力区块水平井应用压驱渗转方式开发取得显著成效。根据4月10日的生产数据，20口井单井平均日产油量从措施前的2吨提升至10.1吨，综合含水率控制在26.2%，累计增油达5万余吨。

China Oil News: The Changqing Oilfield has achieved remarkable results in developing the 156 main block in Longdong Mountain using the pressure-driven and permeability-transformation method. According to the production data on April 10th, the average daily oil production per well of 20 wells has increased from 2 tons before the measures to 10.1 tons, with the comprehensive water cut controlled at 26.2%, and the cumulative oil production has reached over 50,000 tons.

鄂尔多斯盆地超低渗透油藏动用储量占比高、产能贡献大，是长庆油田上产稳产的“压舱石”。但因储层物性差，采用常规水驱开发方式难以建立有效的驱替系统，整体呈现出采油速度和采出程度低的“双低”开发特征，技术创新与开发方式转变迫在眉睫。

The ultra-low permeability oil reservoirs in the Ordos Basin have a high proportion of recoverable reserves and a significant contribution to production capacity. They are the "anchor stones" for increasing production and maintaining stable production in the Changqing Oilfield. However, due to the poor reservoir properties, it is difficult to establish an effective displacement system using the conventional water drive development method. Overall, they exhibit the "double low" development characteristics of low production speed and low recovery degree. Technological innovation and the transformation of development methods are urgently needed.

长庆油田科研人员立足这一主力区块的油藏特征与开发现状，把压驱渗转方式开发作为致密油、页岩油提产提效的主力技术利器，按照“成熟区连片应用、风险区持续攻关、潜力区加快拓展”的开发思路，形成非常规油藏压驱渗三套开发模式，重点以“流场重构、体积压裂、综合补能、协同渗驱”的厚油层立体压驱渗技术模式为核心主线，精细设计压驱渗提高采收率方案，建立储层分类分级综合甜点评价标准，创新应用“五结合”补能优化方法与“十结合”的压裂优化方法，实现地层能量与裂缝系统的精准设计、科学优化。

The scientific researchers of Changqing Oilfield, based on the reservoir characteristics and development status of this key block, have adopted the pressure-driven permeability transformation method for development as the main technical tool for increasing production and efficiency of tight oil and shale oil. According to the development concept of "application in mature areas, continuous research in risky areas, and accelerated expansion in potential areas", they have formed three development models for unconventional reservoirs: pressure-driven permeability transformation, volume fracturing, and comprehensive energy replenishment. The core mainline of this is the three-dimensional pressure-driven permeability transformation technology mode of "flow field reconstruction, volume fracturing, comprehensive energy replenishment, and collaborative permeability drive", which is used to design the pressure-driven permeability transformation technology for increasing recovery rate. They have established a comprehensive sweet spot eva luation standard for reservoir classification and grading, and innovatively applied the "five combinations" energy replenishment optimization method and the "ten combinations" fracturing optimization method to achieve precise design and scientific optimization of formation energy and fracture system.

以水平井压裂驱油一体化技术为实施重点，根据不同井况精准优选双封单卡、井筒再造工艺，创新引入二氧化碳大规模体积重复压裂技术，充分发挥压裂驱油一体化技术优势，打造出更合理、更高效的重复压裂裂缝网络系统技术工艺模式，并研发出具有自主知识产权的压驱渗全流程工艺包，让压驱渗转方式开发的技术作用得到了最大程度发挥。同时，建立了适合黄土塬地貌老区块的压驱渗工厂化作业模式，在降本、增效、环保等方面实现多重突破，大幅压缩了压驱渗转方式施工的生产周期，并实现返排液100%循环综合利用。

With the horizontal well fracturing and oil recovery integrated technology as the implementation focus, based on different well conditions, the double-sealing and single-carding, and wellbore reconstruction processes were precisely selected. The innovative introduction of large-scale volume repeated fracturing technology with carbon dioxide was also carried out. The advantages of the integrated fracturing technology for oil recovery were fully utilized, and a more reasonable and efficient repeated fracturing fracture network system technology process model was created. An independently intellectual property-owned fracturing, permeation, and filtration full-process process package was also developed, allowing the technical effect of the fracturing, permeation, and filtration transformation development method to be maximally exerted. At the same time, a factory-based operation mode for fracturing, permeation, and filtration suitable for old blocks in the loess plain terrain was established. Multiple breakthroughs were achieved in terms of cost reduction, efficiency improvement, and environmental protection. The production cycle of the fracturing, permeation, and filtration transformation construction was significantly compressed, and 100% recycling and comprehensive utilization of the flowback fluid were realized.

同时，长庆油田把地质工程一体化、科研生产一体化、技术管理一体化贯穿于生产全过程，经过多年攻关，形成了多重流动耦合立体开发理论，创新了渗流场重构压裂驱油一体化主体技术体系，采油速度提高5倍以上，单井产量明显提高，预测采收率可提升12个百分点。

Meanwhile, the Changqing Oilfield has integrated geological engineering, scientific research and production, and technical management throughout the entire production process. After years of research and development, it has formed a multi-flow coupling three-dimensional development theory, innovated an integrated technical system for reservoir reconstruction and fracturing for oil recovery, and increased the oil production rate by more than five times. The single-well production has significantly improved, and the predicted recovery rate can be increased by 12 percentage points.

目前，长庆油田压驱渗转方式开发技术已在华庆、合水、姬塬等12个拓展区16个主力油藏推广应用，累计投产井325口，区块日产油水平由350余吨提升至1005吨，其中水平井单井产量由1.5吨提升至9.5吨，支撑了老油田的高效稳产，为非常规油藏高效开发提供了技术模式。

At present, the pressure-driven and permeability-transformation development technology of the Changqing Oilfield has been applied in 12 expansion areas and 16 main oil reservoirs in Huacun, Heshui, and Jiuyuan, etc. A total of 325 production wells have been put into operation. The daily oil production of the blocks has increased from over 350 tons to 1,005 tons. The production of horizontal wells has also increased from 1.5 tons to 9.5 tons per well, supporting the efficient and stable production of old oilfields and providing a technical model for the efficient development of unconventional oil reservoirs.