彭芬,张宝,杨鹏程,等. 库车山前超深巨厚致密砂岩纵向细分层改造技术[J]. 石油钻探技术,2024, 52(2):1-7. DOI: 10.11911/syztjs.2023113
引用本文: 彭芬,张宝,杨鹏程,等. 库车山前超深巨厚致密砂岩纵向细分层改造技术[J]. 石油钻探技术,2024, 52(2):1-7. DOI: 10.11911/syztjs.2023113
PENG Fen, ZHANG Bao, YANG Pengcheng, et al. Vertical subdivision layer transformation technology for ultra-deep and super-thick tight sandstone in Kuqa Piedmont [J]. Petroleum Drilling Techniques,2024, 52(2):1-7. DOI: 10.11911/syztjs.2023113
Citation: PENG Fen, ZHANG Bao, YANG Pengcheng, et al. Vertical subdivision layer transformation technology for ultra-deep and super-thick tight sandstone in Kuqa Piedmont [J]. Petroleum Drilling Techniques,2024, 52(2):1-7. DOI: 10.11911/syztjs.2023113

库车山前超深巨厚致密砂岩纵向细分层改造技术

Vertical Subdivision Layer Transformation Technology For Ultra-Deep and Super-Thick Tight Sandstone in Kuqa Piedmont

  • 摘要: 塔里木油田库车山前白垩系储层为超深巨厚裂缝性致密砂岩,天然裂缝发育,储层非均质性强,已改造井产气剖面测试显示常规笼统改造纵向厚储层动用不充分,产能释放不彻底。为了解决这一问题,对于油层厚度大且中间有明显隔层的井可实施分层压裂工艺,提高纵向改造程度。通过工程地质一体化研究,利用多种测井数据,建立了一套多尺度近远井裂缝精细识别方法;基于钻井漏失量与产量关系认识,建立了一套综合考虑构造位置、钻井井漏、裂缝发育情况、力学活动性等资料的储层评估分类方法;通过双封隔器管柱力学精细校核,增加伸缩管,优化暂堵材料粒径,形成了“机械+暂堵”软硬复合分层技术。该技术实现了巨厚储层高效动用,应用20口井,改造后单井产量由6.7×104 m3提高至34.0×104 m3,平均增产5倍,提产效果显著,为巨厚致密砂岩储层高效开发提供了技术支撑。

     

    Abstract: The cretaceous system in Kuche Piedmont of Tarim Basin is a super-deep and super-thick fractured tight sandstone with developed natural fractures and strong heterogeneity of reservoir, the gas production profile test of reformed wells shows that the conventional general modification of vertical thick reservoirs is not sufficient, the production capacity is not completely released. In order to solve this problem, stratified fracturing technology can be implemented for wells with large reservoir thickness and obvious interlayer. A set of multi-scale near-far well fracture fine identification method is established by using multi-logging data through engineering geology integration research; Based on the understanding of the relationship between lost circulation and production, a set of reservoir evaluation classification method is established, which comprehensively considers the structural location, lost circulation in drilling, fracture development, mechanical activity and other data; Through mechanical fine checking of double packer string, adding expansion pipe and optimizing the grain size of temporary plugging material, forming a 'mechanical+temporary blocking' soft and hard composite layering technology, realizing the highly efficient production of huge thick reservoir. Results after 20 wells were used, the output of single well is increased from 67,000 cubic meters to 340,000 cubic meters after reforming, with an average production increase of 5 times, the effect of increasing production is remarkable, and it is a powerful technical support for efficient development of tight sandstone reservoir.

     

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