恩平油田群拥有9座生产设施，同时开发13个油田，全面达产后将成为南海东部油田日产量最高的油田群。其中，恩平20-4油田是恩平油田群产能最高的单体油田，是油田群持续稳产上产的重要支柱。

钻完井期间，该油田A7H井以1.44天打破中国海油3001~3500米水平井下筛管完井最短周期纪录；A21H井以1.9天打破中国海油2501~3000米水平井砾石充填完井最短周期纪录；16英寸牙轮钻头进尺以3795.2米打破中国海油钻井单项纪录。

规模化实施双分支水平井：少井高产，关键是持续稳产，稳产的关键重在提高油藏动用效率和扩大泄油面积。

中国海油深圳分公司钻完井团队在不增加成本情况下，通过悬空侧钻和双分支防砂技术，在同一储层实施两个水平分支井眼钻完井作业，实现少井高产。

工程地质一体化：为有效识别低渗储层，团队结合地质油藏理论成果引入微取心钻头，边分析边钻进。这就好比在钻头上安装了一盏巨大的照明灯，帮助技术人员及时、准确地判断前进方向，从而更从容地掌好“船舵”，保证储层有效钻遇。

一趟多层压裂充填防砂：为解决地层出砂堵塞油气通道的问题，项目团队创新技术，大幅度降低流动阻力，使原油沿“高速公路”快速进入井筒，保证油藏采收率。

双分支控水防砂：针对双分支底水油藏，团队在主分支下入多个膨胀封隔器，实现了各分支产液的均衡分配。同时，在每一段产层管柱上安装控水阀，它就像地下油藏的“智能交通指挥官”，能有序地调整原油的通道和流速，确保油气高效稳定开采。

Enping Oilfield Group has 9 production facilities and 13 oil fields are being developed at the same time, which will become the highest daily production oil field group in the eastern South China Sea once fully realized. Among them, Enping 20-4 oilfield is the single oil field with the highest productivity in Enping oilfield group, and it is an important pillar for the sustainable and stable production of the oil field group.

During drilling and completion, well A7H broke the CNOOC record for the shortest completion period of 3001~3500 m horizontal downhole screen in 1.44 days. Well A21H broke CNOOC's record for the shortest gravel pack completion period of 2501~3000 m horizontal well in 1.9 days. 16 inch cone drill drill penetration of 3795.2 meters broke the single record of CNOOC drilling.

Large-scale implementation of double-branch horizontal Wells: the key to high yield with fewer Wells is to maintain stable production, and the key to maintain stable production is to improve the reservoir utilization efficiency and expand the drainage area.

The drilling and completion team of CNOOC Shenzhen Branch implemented two horizontal branching borehole drilling and completion operations in the same reservoir without increasing the cost through hanging sidedrilling and two-branch sand control technology to achieve high production with fewer Wells.

Engineering geology integration: In order to effectively identify low-permeability reservoirs, the team combined the theoretical achievements of geological reservoirs with the introduction of micro-core bits, analysis while drilling. This is like installing a huge light on the drill to help technicians judge the direction of progress in a timely and accurate manner, so as to more calmly handle the "rudder" to ensure effective drilling of the reservoir.

Multi-layer fracturing and filling sand control: In order to solve the problem of formation sand blocking oil and gas channels, the project team innovated technology to greatly reduce the flow resistance, so that the crude oil quickly entered the wellbore along the "highway" to ensure the recovery of the reservoir.

Two-branch water and sand control: For the two-branch bottom-water reservoir, the team placed multiple expansion packers under the main branch to achieve balanced fluid distribution in each branch. At the same time, the installation of water control valves on each section of the production string is like an "intelligent traffic commander" of the underground reservoir, which can orderly adjust the passage and flow rate of crude oil to ensure efficient and stable oil and gas production.