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低温高强韧性水泥浆在致密油水平井的应用

文档作者：丁志伟1 杨俊龙2 汪瑶3 纪宏飞1 袁雄1 饶开波4		点击数：	更新时间： 2023年10月05日
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第34 卷 第2 期
2017 年3 月
Vol. 34 No. 2
Mar. 2017
钻 井 液 与 完 井 液
DRILLING FLUID &amp;amp; COMPLETION FLUID
丁志伟1，　杨俊龙2，　汪瑶3，　纪宏飞1，　袁雄1，　饶开波4
丁志伟，杨俊龙，汪瑶，等. 低温高强韧性水泥浆在致密油水平井的应用[J]. 钻井液与完井液，2017，34（2）：106-110，116.
DING Zhiwei，YANG Junlong，WAN Yao，et al.Cementing tight reservoir with low temperature high strength tough cement
slurry[J]. Drilling Fluid &amp;amp; Completion Fluid，2017，34（2）：106-110，116.
Cementing Tight Reservoir with Low Temperature High Strength Tough Cement Slurry
DING Zhiwei1, YANG Junlong2, WANG Yao3, JI Hongfei1, YUAN Xiong1, RAO Kaibo
(1. Research Institute of Drilling Engineering Technology, PetroChina, Beijing 102206;2. CCDC Changqing Oilwell
Cementing Company, Xi’an, Shaanxi 710018;3. Department of Engineering Technology, PetroChina Southwest Oil &amp;amp; Gas
Field Company, Chengdu 610051;4. No. 1 Drilling Engineering Company BHDC, PetroChina,Tianjin 300280)
Abstract The Yanchang tight reservoir in the Changqing has shallow burial depth and low static bottom hole temperature. Conventional
cement slurries used in this area produced highly brittle set cements with strengths that are developed very slowly. In large-scale
stimulated reservoir volume fracturing, the brittle set cement easily lost its integrity, severely endangering the production of tight oil
and the production life of the well. To solve these problems, a low temperature high strength tough cement slurry has been formulated
with a low temperature accelerating early strength DRA, a low temperature strengthening material DRB, a low temperature toughness
improving agent DRE-300S, and some other cement slurry additives. This cement slurry, at 55 ℃, had 24-hour compressive strength
of 35.8 MPa, and 168-hour compressive strength of 50.6 MPa. Compared with conventional cement slurries, the compressive strength
of this cement slurry was increased by 33.1%, and the elastic modulus reduced by 14.3%, showing good low temperature toughness.
The sealing integrity of the cement sheath under the action of alternating stresses was greatly improved. This cement slurry has
been successfully used four times in cementing the φ139.7 mm production casing string in horizontal wells in Changqing Oilfield,
providing a technological base for the application of low temperature high toughness cement slurries.
Key words Tight oil; Horizontal well; Well cementing; High strength; Low temperature; Tough cement slurry; Elastic modulus
长庆油田致密油分为致密砂岩油和页岩油2 大类，其中以鄂尔多斯盆地延长组6 段和延长组7

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