截至9月23日，塔里木油田已在塔中86C井等8口井上成功实施碳酸盐岩侧钻一开。

As of September 23rd, the Tarim Oilfield has successfully carried out carbonate rock sidetracking and single-stage drilling in 8 wells including Well 86C in the Tarim Central area.

数据是最有力的注脚：今年，塔里木油田碳酸盐岩侧钻井中，实施一开的占比从去年的20%攀升至88.9%。这一百分比变化，标志着塔里木油田碳酸盐岩侧钻一开技术，实现了从单点突破向规模化推广的关键性转变。

Data speaks volumes: This year, in the carbonate rock sidetracking wells of the Tarim Oilfield, the proportion of wells that implemented the first stage of drilling rose from 20% last year to 88.9%. This percentage change indicates a crucial transformation in the carbonate rock sidetracking one-stage drilling technology of the Tarim Oilfield, from a single breakthrough to large-scale promotion.

侧钻井，通俗来讲就是在老井的某个深度“另起炉灶”，横向钻入新的储层寻找剩余油气。过去，这类井普遍采用侧钻二开——开窗后先下一层套管护住井壁，再往深处钻进。而侧钻一开则省去了中间环节，开窗后直接钻到目标层。

Side drilling, in simple terms, means starting anew at a certain depth of an existing well, horizontally drilling into a new reservoir to search for remaining oil and gas. In the past, such wells typically adopted side drilling with a second opening - after creating the window, a layer of casing was lowered to protect the wellbore, and then drilling was continued deeper. However, side drilling with a single opening eliminates the intermediate steps, with the window being created and then drilling directly to the target layer.

塔里木油田为什么要做这道减法？效益账如何算得过来？技术瓶颈能否突破？记者深入现场一探究竟。

Why did the Tarim Oilfield undertake this subtraction operation? How can the benefits be calculated? Can the technical bottlenecks be overcome? Journalists went to the scene to find out the truth.

老区开发的“必答卷”，如何寻找最优解？

How can we find the optimal solution for the "must-answer questions" in the development of old areas?

老区不是没有油气，而是缺少挖潜的经济打法。

The old oil and gas-producing areas do have reserves; the problem is that they lack effective economic strategies for exploitation.

时间回到2022年至2024年。

The time frame is from 2022 to 2024.

彼时，塔里木油田累计完成碳酸盐岩侧钻井17口。可这份成绩单背后却压着沉甸甸的焦虑：16口井的井筒准备周期超限，15口井的钻井周期“飘红”，平均准备周期达57.08天，平均钻井周期达134.23天，单井周期费用居高不下，压得所有人喘不过气。

At that time, the Tarim Oilfield had completed a total of 17 carbonate rock sidetracking wells. However, behind this impressive achievement lay a heavy burden of anxiety: the preparation period for the wellbores of 16 wells exceeded the limit, and the drilling periods of 15 wells were "above the warning line". The average preparation period was 57.08 days, and the average drilling period was 134.23 days. The cost per well cycle remained high, weighing heavily on everyone and making it difficult for them to breathe.

“周期长、费用高，老区块的剩余储量明明还在，却因为成本压力而难以有效动用。”塔里木油田油气工艺研究院钻井研究部主任李宁道出当时的困局。

"The process is lengthy and costly. Despite the fact that the remaining reserves in the old wells are still available, they are difficult to be effectively utilized due to the pressure of costs." Li Ning, the director of the Drilling Research Department of the Oil and Gas Technology Research Institute of Tarim Oilfield, described the predicament at that time.

轮古、塔中等老区，虽然地质储量丰厚，却已步入艰难的开发调整阶段。科研团队面临一个非解不可的“必答题”：如何从困局中杀出重围，为老区低成本开发蹚出一条活路？

In old mining areas such as Lungu and Taizhong, although the geological reserves are abundant, they have already entered a difficult stage of development adjustment. The research team is faced with an unavoidable "must-answer question": How can they break through the deadlock and find a way to develop these old areas at a low cost?

“传统思路走不通了。老区开发就像修旧路，不能只靠修修补补，必须从设计源头动刀子。”李宁说，以往碎屑岩与碳酸盐岩各自为战的井身结构设计，导致开次多、工序冗长，是制约提速、提效的核心问题。

The traditional approach is no longer feasible. The development of old areas is like renovating an old road; it cannot rely solely on minor repairs and renovations; instead, it must start from the design stage and make radical changes. Li Ning said that the previous wellbore structure design, where clastic rocks and carbonate rocks were treated separately, led to numerous drilling operations and lengthy procedures, which were the core issues restricting the acceleration and improvement of efficiency.

2024年，塔里木油田油气工艺研究院果断“亮剑”，组建碳酸盐岩侧钻攻关团队。在一次头脑风暴中，团队萌生了一个设想：若将碎屑岩与碳酸盐岩合并钻进，井身结构便可由侧钻二开压缩为侧钻一开。

In 2024, the Oil and Gas Technology Research Institute of Tarim Oilfield took decisive action and established a research team dedicated to carbonate rock sidetracking. During a brainstorming session, the team came up with an idea: if sedimentary rocks and carbonate rocks were combined for drilling, the well structure could be reduced from the second sidetrack to the first sidetrack.

方向有了，答案还要靠实践来检验。于是，团队逐一复盘已完成井，在中古151-6XC井捕捉到希望的星火：该井在桑塔木组、良里塔格组、一间房组3套地层中，首次跑通470米段长碎屑岩与碳酸盐岩合打。

The direction has been determined, but the answer still needs to be verified through practice. Therefore, the team reviewed each completed well one by one, and in the Zhonggu 151-6XC well, they captured the promising spark: This well was the first to successfully complete a 470-meter section-long joint drilling of clastic rocks and carbonate rocks in three formations: the Santamu Formation, the Liangritag Formation, and the Yiqianfang Formation.

“那一刻我们意识到，储层专打可以破局，碎屑岩与碳酸盐岩并非不可共生。”油气工艺研究院钻井研究部副主任张权感慨道。

At that moment, we realized that reservoir fracturing could solve the problem, and that clastic rocks and carbonate rocks could coexist after all. Zhang Quan, the deputy director of the Drilling Research Department of the Oil and Gas Technology Research Institute, expressed his thoughts with a sense of awe.

从“二开”到“一开”，怎样打出新天地？

From "Double Opening" to "Single Opening", how can we create a new world?

减法做到点子上，提速才能落到实处。

If subtraction is done correctly, then the acceleration can be truly achieved.

从技术路线验证到形成可推广的标准操作，一腔热血是起步，大量“细活”才是磨出标准的关键。

From the verification of the technical route to the formation of a scalable standard operation procedure, a passionate spirit is the initial step, while a large amount of "detailed work" is the key to forging the standard.

团队没有急于求成，而是沉下心来，用一年时间开展侧钻能力提升岗位大练兵活动，围绕核心命题反复推演。最终，团队探索形成了以“通井刮壁一体化、一体化桥塞打塞加精准留塞、一体化斜向器开窗工具、盲打定向二合一”为核心的“四合一”组合拳。措施落地后，准备周期减少5趟钻，直接缩短工期8天。

The team did not rush for quick success. Instead, they focused their efforts and spent one year conducting a large-scale training activity for improving sidetracking capabilities. They repeatedly analyzed and discussed based on the core proposition. Eventually, the team explored and formed a "four-in-one" combination strategy centered around "integrated well cleaning and wall scraping, integrated bridge plug setting and precise retention, integrated slanting tool for window opening, and combined blind drilling and directional drilling". After the measures were implemented, the preparation period was reduced by five drilling trips, directly shortening the construction period by 8 days.

与此同时，团队突破思维定式，向泥岩段长限制发起挑战，明确在特定安全井况下全面推进侧钻“二开合一开”。仅此一项，钻井周期就再压缩20天。两“箭”齐发，累计节约钻井周期达28天。

Meanwhile, the team broke through the conventional thinking and challenged the limit of the mudstone section length. They clearly defined the comprehensive implementation of sidetracking and "two-stage one-stage" drilling under specific safe well conditions. Just this one measure alone reduced the drilling cycle by another 20 days. With the simultaneous launch of these two measures, the cumulative drilling cycle was saved by a total of 28 days.

2025年，哈12-4C井成为这项技术路线的首个试验井，首次实现了五层系合打，并将泥岩底井斜精准控制在44度，钻进过程平稳顺利。该井投产后日产油量超百吨，钻井周期仅43.25天，比同年完成的2口侧钻二开井的周期缩短了30天。

In 2025, Well H12-4C became the first test well for this technical route. It successfully achieved the simultaneous drilling of five layers and precisely controlled the bottom well inclination of mudstone at 44 degrees. The drilling process was smooth and successful. After the well was put into production, its daily oil output exceeded 100 tons. The drilling cycle was only 43.25 days, which was 30 days shorter than the cycle of the two sidetracked second-open wells completed in the same year.

“这口井成了老区低成本侧钻的标杆之作。”塔里木油田油气工艺研究院钻井研究部钻井工艺项目组项目经理文亮说。一口井就省出一个月的工期，这在过去难以想象。

"This well has become a benchmark for low-cost sidetracking in the old area," said Wen Liang, the project leader of the drilling technology team at the Drilling Research Department of the Oil and Gas Technology Research Institute of Tarim Oilfield. "It has saved one month of construction time for just one well. This was unimaginable in the past."

侧钻一开的核心不是简单地少下一层套管，而是对地质条件的精准判断。什么井能合打、什么井不能，团队为其厘清了清晰的技术边界。

The core of sidetracking is not simply to drill one less layer of casing, but rather a precise assessment of the geological conditions. The team clearly defined the technical boundaries for which wells could be drilled together and which ones could not.

从“标杆井”到“规模化”，如何落地生根？

From "benchmark wells" to "large-scale operations", how to take root and thrive?

技术突破之后，紧接着是组织与机制的深度发力。

After the technological breakthrough, the next step is the deep implementation of organizational and institutional measures.

老井侧钻何以实现跨越式突破？答案里少不了党建互联与效益的深度交汇。

How can sidetracking of old wells achieve a leapfrog breakthrough? The answer surely involves the deep integration of Party building and interconnection with benefits.

今年年初以来，塔里木油田油气工艺研究院与开发事业部强强联手，签订党建互联共建协议，成立了碳酸盐岩低成本侧钻技术保障“党员突击队”，协同作战的大幕正式拉开。

Since the beginning of this year, the Oil and Gas Technology Research Institute of Tarim Oilfield and the Development Department have joined forces to sign a party building interconnection and joint construction agreement, and established the "Party Member Vanguard Team" for ensuring low-cost sidetracking technology of carbonate rocks. The curtain of collaborative operations has officially risen.

团队对2025年至2026年实施井开展趟钻式单井后评估，锁定精准留塞、一体化开窗工具、定向盲打二合一等尚未完全落地的工序，逐一分析风险，系统推演预案。“我们不放过任何一个可能受阻的环节。”文亮表示。

The team conducted a trip-drilling-based post-eva luation of the wells to be drilled from 2025 to 2026, identifying the unfinished procedures such as precise plug retention, integrated window opening tools, and directional blind drilling. They analyzed the risks one by one and systematically developed contingency plans. "We won't let go of any potential bottleneck," Wen Liang said.

在一体化风险研判和常态化技术支撑的联合攻坚下，突破接踵而至：热普7-H3C井率先闯关“二合一”，跃满20-H2C井挺进“三合一”，轮古15-5C2井与哈9-13XC井一鼓作气拿下“四合一”大满贯。值得一提的是，塔中86C井从桑塔木泥岩直穿一间房组灰岩，合打段长达1150.4米，一举刷新碎屑岩与碳酸盐岩合打进尺的新纪录。

Under the joint efforts of integrated risk assessment and regular technical support, breakthroughs followed one after another: the Hotpu 7-H3C well was the first to pass the "two-in-one" test, the 20-H2C well followed suit and advanced to the "three-in-one" stage, and the Lungegu 15-5C2 well and the Ha 9-13XC well worked together to achieve the "four-in-one" grand slam. What's worth mentioning is that the Tazhong 86C well directly penetrated through the Santamu mudstone and reached the Igneous Rock of the Yinzhou Formation, with the joint drilling section reaching a length of 1150.4 meters, which broke the new record for the joint drilling depth of sedimentary rocks and carbonate rocks.

数据显示，2026年方案优化成功率达到100%，准备周期压缩至平均20.29天，侧钻一开钻井周期53.13天，较2025年缩减21.06天。按每钻完一口井的综合成本折算，单井平均节省钻井费用超过300万元。

The data shows that the success rate of the scheme optimization will reach 100% in 2026, the preparation period will be reduced to an average of 20.29 days, the one-stage sidetracking drilling cycle will be 53.13 days, which is 21.06 days shorter than that in 2025. Based on the total cost of each drilled well, the average drilling cost per well is saved by over 3 million yuan.

“从17口井开始摸索，到如今9口井中8口采用侧钻一开，我们实现了从‘敢想’到‘敢干’再到‘会干’的转变。”开发事业部台盆区项目部主任兼党支部副书记刘学青说，“但该技术的规模化推广才刚起步，后面还有更多硬仗要打。”

"Starting with 17 wells and progressing to the current situation where 8 out of 9 wells have adopted sidetracking as the first step, we have achieved a transformation from 'being willing to think' to 'being willing to act' and finally to 'being able to do it well'." Liu Xueqing, the director of the basin area project department and the secretary of the Party branch of the Development Division, said, "However, the large-scale promotion of this technology has just begun, and there are still many tough battles to be fought ahead."

从单点突破到规模化推广，这场侧钻井优化翻身仗证明，唯有源头设计与现场保障全链条发力，老井侧钻方能成为老区效益开发的“金钥匙”。减法做到极致，加法便有无限可能——一开之变，不仅改变了井下结构，还提振了开发信心，更为老油田赢得新的增长空间。

From a single breakthrough to large-scale promotion, this successful campaign of sidetracking well optimization proves that only when the entire process of source design and on-site guarantee is fully exerted can sidetracking of old wells become the "golden key" for efficient development of old oilfields. When subtraction is carried out to the extreme, addition will have unlimited possibilities - a change in the opening process not only alters the downhole structure but also boosts the development confidence and opens up new growth space for old oilfields.