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中国石油勘探  2019, Vol. 24 Issue (2): 241-249    DOI: 10.3969/j.issn.1672-7703.2019.02.013
  工程技术 本期目录 | 过刊浏览 | 高级检索 |
玛湖致密砾岩油藏水平井体积压裂技术探索与实践
许江文1, 李建民1, 邬元月1, 丁坤1, 江洪2
1 中国石油新疆油田公司工程技术研究院;
2 中国石油新疆油田公司开发公司
Exploration and practice of volume fracturing technology in horizontal well of Mahu tight conglomerate reservoirs
Xu Jiangwen1, Li Jianmin1, Wu Yuanyue1, Ding Kun1, Jiang Hong2
1 Engineering Technology Research Institute, PetroChina Xinjiang Oilfield Company;
2 PetroChina Xinjiang Oilfield Development Company
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摘要 玛湖油田致密砾岩油藏油气富集、开发潜力巨大,但成藏条件复杂、岩性致密、储层物性差、非均质性强、砂体跨度大,压裂面临着起裂困难、裂缝复杂程度低、有效支撑难度大、稳产能力差等挑战。针对油藏地质特征与改造难点,秉承"缝控储量"的理念,拓宽非常规油藏体积压裂认识,通过5年的探索与实践,集成了以细分切割为主要特点的致密砾岩油藏水平井体积压裂技术系列。通过速钻桥塞分段、小裂缝间距分簇射孔、大排量逆混合注入相结合,确保段内多簇裂缝高效起裂延展;组合加砂工艺与大液量滑溜水替代瓜尔胶入井相结合,在改善裂缝纵向及远端支撑剂铺置效果、提高裂缝导流能力的同时,实现地层增能蓄能;从而实现了致密砾岩储层的体积改造,确保了压裂改造的长期有效。该项技术目前已在玛湖全区的勘探、评价与产能建设领域推广应用,累计在11区块实施水平井86井次,改造后水平井增产稳产效果显著提升,取得了玛湖致密砾岩油藏效益开发的突破,有效推动了玛湖油田的整体开发和规模效益动用。
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许江文
李建民
邬元月
丁坤
江洪
关键词 玛湖油田致密砾岩油藏水平井细分切割体积压裂    
Abstract:Mahu tight conglomerate reservoirs have huge potential of tight oil resource and exploitation. Based on the complex reservoir-forming conditions, poor reservoirs property, strong heterogeneity and large sand body span, hydraulic fracturing in this area was facing serious challenges in fracture initiation and proppant placement. Annual production capacity of fractured wells were under expectation. According to the concept of "fracture-controlled reserves", series technologies of subdivision volume fracturing are integrated after 5 years of exploration. High-efficiency initiation and extension of multi-cluster fractures in one section are achieved by using drillability bridge plug segmented, small crack spacing cluster perforation and large displacement inverse mixing injection technologies. The effect of proppant placement and reservoir pressure are improved through multi-scale proppant adding method and increasing the dosage of slippery water to replace the guar gum. The series technologies have been widely applied in 11 blocks and 86 wells in Mahu, including exploration, evaluation and development area. For tight oil reservoir, the fracturing and producing effects have improved and economic development has been realized. Then, development of the total Mahu oilfield is effectively promoted.
Key wordsMahu oilfield    tight conglomerate reservoirs    horizontal well    subdivision volume fracturing technology
收稿日期: 2018-09-20      出版日期: 2019-03-15
ZTFLH:     
基金资助:国家科技重大专项“大型油气田及煤层气开发”(2017ZX05070)。
引用本文:   
许江文, 李建民, 邬元月, 丁坤, 江洪. 玛湖致密砾岩油藏水平井体积压裂技术探索与实践[J]. 中国石油勘探, 2019, 24(2): 241-249.
Xu Jiangwen, Li Jianmin, Wu Yuanyue, Ding Kun, Jiang Hong. Exploration and practice of volume fracturing technology in horizontal well of Mahu tight conglomerate reservoirs. China Petroleum Exploration, 2019, 24(2): 241-249.
链接本文:  
http://www.cped.cn/CN/10.3969/j.issn.1672-7703.2019.02.013      或      http://www.cped.cn/CN/Y2019/V24/I2/241
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