中国石油勘探 ›› 2018, Vol. 23 ›› Issue (2): 90-103.DOI: 10.3969/j.issn.1672-7703.2018.02.012

• 工程技术 • 上一篇    下一篇

地质工程一体化在玛湖凹陷致密砂砾岩水平井开发中的实践

刘涛1, 石善志1, 郑子君2, 纪拥军1, 王磊2   

  1. 1 中国石油新疆油田公司;
    2 能新科(西安)油气技术有限公司
  • 收稿日期:2018-02-08 修回日期:2018-03-05 出版日期:2018-03-15 发布日期:2018-03-16
  • 基金资助:
    国家科技重大专项"大型油气田及煤层气开发"(2016ZX05023)。

Application of geology-engineering integration for developing tight oil in glutenite reservoir by horizontal wells in Mahu sag

Liu Tao1, Shi Shanzhi1, Zheng Zijun2, Ji Yongjun1, Wang Lei2   

  1. 1 PetroChina Xinjiang Oilfield Company;
    2 ENTI(Xi'an) Oil & Gas Technology Co., Ltd
  • Received:2018-02-08 Revised:2018-03-05 Online:2018-03-15 Published:2018-03-16
  • Supported by:
     

摘要: 准噶尔盆地玛湖凹陷东斜坡的玛东2井区致密砂砾岩储层埋藏深,物性差,水敏、压敏现象严重,储层岩体砾径分选性差,非均质性强,脆性差,导致其效益开发难度大。在吸取邻区经验的基础上,将地质认识和工程技术紧密结合,对玛东2井区内第一口评价水平井(玛东1号)的工程设计进行了大量研究论证,并引进先进技术保障实施效果。开展大量岩心实验和精细测井解释,摸清了区块砂砾岩的岩性和物性;采用精细地震采集、解释和建立砂砾岩储层分类方法,优选了目的层和轨迹;采用先进地质导向工具并利用模型重构技术实时调整,确保了钻遇率和钻井效率;通过试油分析和数值模拟分析影响砂砾岩储层压裂增产的因素,进行了工艺技术优化等。通过多学科的协调配合,玛东1号水平井在含水稳定后,采用3mm油嘴生产时的平均产油量达到53.9t/d,取得了远超区块直井的提产增效成果。

 

关键词: 地质工程一体化, 玛湖凹陷, 致密油, 砂砾岩, 储层改造

Abstract: Tight glutenite reservoirs in Block Madong 2 at the eastern slope of the Mahu sag in the Junggar Basin are buried deeply, poor in physical properties, and very sensitive to water and pressure; and the glutenite is hard to grade, strongly heterogeneous and brittle, so that it is difficult to get economic exploitation. With experiences from adjacent regions, and integrating geologic cognitions with engineering techniques, the engineering design of the first horizontal evaluation well (Madong 1) in this block was optimized, and the advanced technology was introduced to guarantee application effect. Specifically, many core experiments and fine well logging interpretation were conducted to identify the lithologies and physical properties of the glutenites; fine seismic acquisition, processing and interpretation were carried out and the method of classifying glutenite reservoirs was established to optimize target layers and well trajectories; advanced geosteering tools and real-time model-updating technique were used to increase drill-in rate and drilling efficiency; and well test and numerical stimulation were performed to study factors affecting post-fracturing production of glutenite reservoirs and optimize engineering techniques. Base on multidisciplinary cooperation, Well Madong 1 obtained average oil production of 53.9 t/d through a 3-mm choke at stable water cut. Such production increase is much higher than a vertical well in the block.

Key words: geology-engineering integration, Mahu sag, tight oil, glutenite, reservoir stimulation

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