哈萨克斯坦北特鲁瓦油田“一体化”井钻井液技术

焦小光

doi:10.3969/j.issn.1001-5620.2018.03.013

哈萨克斯坦北特鲁瓦油田“一体化”井钻井液技术

doi: 10.3969/j.issn.1001-5620.2018.03.013

焦小光

中国石油集团长城钻探工程有限公司钻井液公司, 北京 100101

基金项目:

国家863计划“海上大位移钻井液关键技术研究”（2012AA091502）；中石油集团重大专项“高温高密度钻井液及可排放海水基钻井液成套技术研究”（2013E-3802）。

详细信息

作者简介:
焦小光,1982年生,硕士研究生,现在从事钻井液技术研究工作。E-mail:jiaoxg.gwdc@cnpc.com.cn。

中图分类号: TE254.3
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出版历程
- 收稿日期: 2017-12-13
- 刊出日期: 2018-05-30

Drilling Fluid Technology for “Integrated” Wells in North Troyes Oilfield in Kazakhstan

JIAO Xiaoguang

The Drilling Fluid Branch of CNPC Greatwall Drilling Company, Beijing 100101

摘要

摘要: 哈萨克斯坦北特鲁瓦油田近年来大力推行的“一体化”钻井模式，对钻井液技术提出了挑战。针对这一情况，对北特鲁瓦油田的地质工程概况和钻井液技术难点进行了分析，室内研究形成了一套饱和盐聚磺钻井液体系，并优选出2种屏蔽暂堵材料，ZD-1是一种可酸溶刚性粒子，EP-1是一种油溶性可变形颗粒，2者粒径与油层孔喉尺寸匹配，加入2% EP-1和3% ZD-1的暂堵剂后，钻井液体系的渗透率恢复值达到89%，超过了85%的控制指标，满足现场施工要求。在哈萨克斯坦的首口“一体化”井H817进行了应用，顺利钻达目的层，平均井径扩大率控制在8%以内，机械钻速提升15.2%，屏蔽暂堵钻井液技术可满足碳酸盐岩孔隙型、微小裂缝型储层保护要求，日稳产原油110 t，较邻井产量提升26.4%。
- 聚磺钻井液 /
- 饱和盐水钻井液 /
- 一体化 /
- 盐岩层 /
- 屏蔽暂堵 /
- 油层保护
Abstract: The north Troyes oilfield (Kazakhstan) in recent years has been carrying out the "integrated" drilling mode which imposes new challenges to drilling fluid. To deal with the challenges, a saturated polymer sulfonate drilling fluid was formulated based on the analyses of geology of the formations and technical problems associated with drilling fluid operations in the north Troyes oilfield. The saturated drilling fluid was treated with two temporary plugging agents, ZD-1 and EP-1. ZD-1 is an acid soluble rigid particle, while EP-1 is an oil soluble deformable particle. The particle size distribution of ZD-1 and EP-1 is compatible with the sizes of pore throat in the reservoir. Test of the drilling fluid treated with 2% EP-1 and 3%ZD-1 on core samples showed that the permeability recovery of the cores was 89%, exceeding the predetermined target of 85% and satisfying the needs of drilling operations. This drilling fluid formulation was used on the first "integrated" well H817 in Kazakhstan, and the well was drilled to the designed depth successfully. Average percent hole enlargement of the well is less than 8% and the ROP is increased by 15.2%. The temporary plugging agents used are able to protect porous carbonate reservoir and reservoirs with micro-fractures from being damaged. Daily oil production rate of the well H817 is 110 t, which is 26.4% higher than the daily production rate of adjacent wells.
- Polysulfonate drilling fluid /
- Saturated saltwater drilling fluid /
- Integrated /
- Rock salt zone /
- Polymer and sulfonate /
- Temporary plugging

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