大庆油田:精细画像让油藏从“盲盒”变“透明”
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摘要:大庆油田:精细画像让油藏从“盲盒”变“透明”

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8月28日,大庆油田采油六厂地质研究所内,三级工程师裴秀玲与同事依托精准测井解释成果,对某区块的厚油层内部结构界面展开逐层剖析,精准敲定注采调整最优方案。这是大庆油田依托技术创新破解“双特高”后期开发难题的一个缩影。

On August 28th, in the geological research institute of the No. 6 Oil Production Plant of Daqing Oilfield, third-level engineer Pei Xiuling and her colleagues, relying on the precise well logging interpretation results, conducted a layer-by-layer analysis of the internal structure interface of a certain oil layer block, and accurately determined the optimal plan for injection and production adjustment. This is a typical example of Daqing Oilfield using technological innovation to solve the "double high and two special" development problems in the later stage of oilfield development.


当前,大庆油田进入特高含水、特高采出程度的“双特高”开发后期,面临剩余油分布零散、水驱效率下降、综合含水率攀升、挖潜难度激增等一系列行业共性难题。以采油六厂所在的喇嘛甸油田为例。这个已开发53年的老区块,64.8%的地质储量分布在2米以上的厚油层中,传统开发方式难以精准挖潜,不仅制约单区块开发效益,更成为困扰大庆油田老区可持续发展的核心瓶颈之一。

Currently, Daqing Oilfield has entered the later stage of "dual high" development, characterized by extremely high water content and extremely high production rate. It is facing a series of common industry problems such as scattered remaining oil distribution, declining water drive efficiency, rising comprehensive water cut, and increasing difficulty in tapping reserves. Taking Laomadian Oilfield, where the No. 6 Production Plant is located, as an example. This mature oilfield that has been developed for 53 years has 64.8% of its geological reserves distributed in thick oil layers over 2 meters in thickness. Traditional development methods are unable to accurately tap the reserves, which not only hinders the development efficiency of a single block but also has become one of the core bottlenecks restricting the sustainable development of the old Daqing oilfield area.


如何破局?采油六厂的答案是:搭建全新的油层勘测技术体系,用精细化技术“刻度”深挖地下油藏潜力,为老区油田高效开发找准破局路径。

How to break through the deadlock? The answer from the Oil Production No. 6 Plant is: Build a brand-new oil layer exploration technology system, use refined techniques to "measure" and deeply explore the potential of underground oil reservoirs, and find the breakthrough path for the efficient development of old oilfield areas.


这套技术就像给常规测井资料戴上3D眼镜,能精准锁定地下油层每一处结构,让各个油层‘楼层号’精准对应、清晰可辨。”裴秀玲解读着核心技术优势。

This technology is like putting 3D glasses on the regular well logging data, enabling it to precisely identify every structure of the underground oil layers. It allows each oil layer to have a clear and distinct 'floor number' correspondence. Pei Xueling explained the core advantages of this technology.


为破解厚油层挖潜难题,采油六厂深耕多年,打磨成熟的厚油层建筑结构解剖技术,彻底革新传统开发模式。该技术可将复杂的层内开发矛盾转化为可控的层间矛盾,如同将难以精准作业的整块五花肉,精细拆解为可分层、分段精准处理的结构面。

To solve the problem of tapping potential in thick oil layers, the No. 6 Oil Production Plant has been deeply researching for many years and has refined the mature structural dissection technology for thick oil layers. This has completely revolutionized the traditional development model. This technology can transform complex internal development contradictions within the layers into controllable inter-layer contradictions. It is like finely dissecting a whole piece of marinated pork that is difficult to operate precisely into structural planes that can be processed layer by layer and section by section.


在技术落地过程中,采油六厂建立0.1米以上超薄油层界面识别标准,运用测井曲线褶积重构精准识别超薄油层界面,识别精度达73.3%,相较传统技术实现了大幅跃升。

During the process of technology implementation, the No. 6 Oil Production Plant established a standard for identifying the interface of ultra-thin oil layers above 0.1 meters. By using the convolution reconstruction of well logging curves, the ultra-thin oil layer interface was accurately identified, with an identification accuracy of 73.3%. This represents a significant improvement compared to traditional technologies.


“油气藏描述贵在‘精细’,唯有研究过程精益求精,才能保障开发结果精准高效。”裴秀玲将这项技术比作“绣花”。

"Oil and gas reservoir description lies in its 'precision'. Only by constantly improving the research process can we ensure the accuracy and efficiency of the development results." Pei Xueling compared this technology to "embroidery".


今年上半年,采油六厂在12个区块开展精细解剖,水驱自然递减率控制在2.59%,含水上升值仅为0.08个百分点,均优于计划指标。

In the first half of this year, the No. 6 Oil Production Plant conducted detailed analysis in 12 production areas. The natural decline rate of water flooding was controlled at 2.59%, and the increase in water content was only 0.08 percentage points, both of which exceeded the planned indicators.


看清油层只是第一步,更关键的是精准锁定富集部位。在精细解剖油层的前提下,采油六厂依托三维地质建模技术,逐单元筛查研判高含油富集区域,精准锁定15个断层边部潜力井区,优选部署12口高效开发井。

Seeing the oil layer clearly is just the first step. The more crucial thing is to precisely identify the enrichment areas. On the basis of detailed analysis of the oil layer, the No. 6 Oil Production Plant, relying on the three-dimensional geological modeling technology, screened and analyzed each unit to determine the high-oil-enrichment areas, precisely identified 15 potential well areas at the edges of faults, and selected and deployed 12 efficient development wells.


今年2月,首批6口高效开发井正式投产,投产效果远超预期,单井初期平均日产油量达8.6吨,其中喇3-斜2331井日产油量达21.2吨,综合含水率仅为39.4%,成为“双特高”老区提质增效的“明星井”。

In February this year, the first batch of 6 high-efficiency development wells were put into operation. The production results exceeded expectations. The average daily oil production of each well in the initial stage reached 8.6 tons. Among them, the Lao3 - Xiayi2331 well had a daily oil production of 21.2 tons, and the comprehensive water cut was only 39.4%, making it a "star well" for improving efficiency and quality in the "Double Special High" old oilfield.


“在综合含水高达97%的老区区块,打出含水不足40%的优质油井,充分验证了精细油藏解剖与三维地质建模技术,对剩余油精准定位、高效挖潜的核心价值。”采油六厂地质研究所副所长于明说。


精准开发,不仅着眼于产量,更注重效益含金量。为推动油田开发从“产量导向”向“效益导向”转变,采油六厂率先将SEC储量增储工作,从常规技术任务升级为核心经营战略,成立专项工作专班,建立三级责任清单,实现储量管理常态化、精细化、规范化。


今年以来,采油六厂通过专项整治低效井、精准识别无效循环工况,累计控制无效注采量达218.4万立方米,SEC储采比持续稳步提升。


从精细解剖厚油层、精准摸清油藏底数,到断层边部精准“淘金”、落地高效油井,再到SEC储量精细化经营、倒逼效益升级,采油六厂构建的全链条精准开发体系实现突围,是大庆油田应对“双特高”挑战的一隅。如今,从长垣老区到外围油田,从常规油到页岩油,大庆油田各采油厂、各区块立足自身地质禀赋,探索各具特色的破局之路。


“长垣老区持续迭代升级水驱精准开发、分类油层化学驱技术,夯实稳产增效核心根基。外围油田创新低渗致密油藏挖潜技术,持续积蓄上产动能。同时,通过创新陆相高黏土页岩产油理论,实现了陆相页岩从‘生油’到‘产油’的跨越,全方位拓宽老油田的发展空间。”大庆油田开发事业部相关负责人表示。


老油田的出路,不在地质储量的旧账本里,而在每一次技术突破的边界上,在每一口井从“躺平”到“复活”的转身之间。如今的大庆油田,正以精准高效的技术创新的“新刻度”,为高质量发展写下最生动的注脚。




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