新型油基钻井液堵漏剂性能

李红梅; 申峰; 吴金桥; 李伟; 马振锋

doi:10.3969/j.issn.1001-5620.2016.02.009

新型油基钻井液堵漏剂性能

doi: 10.3969/j.issn.1001-5620.2016.02.009

陕西延长石油(集团)有限责任公司研究院, 西安 710075

基金项目: 国家863计划资源环境技术领域页岩气勘探开发新技术项目"页岩气钻完井及储层评价与产能预测技术研究"(2013AA064501)课题的部分内容。

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中图分类号: TE254.4
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出版历程
- 收稿日期: 2016-01-05
- 刊出日期: 2016-03-31

Study on Performance of A New Oil Base Mud Lost Circulation Material

Research Institute of Shaanxi Yanchang Petroleum(Group) Ltd., Xi'an, Shaanxi 710075, China

摘要

摘要: 页岩地层裂缝发育,易膨胀破碎,在钻井过程中极易发生裂缝性井漏等井下复杂事故,且多采用油基钻井液,其价格昂贵,若发生漏失,将造成重大经济损失。研制了一种具有疏松多孔内部微观结构的亲油型高分子树脂类油基钻井液封堵材料YDLJ-1。经实验证明,YDLJ-1具有良好的韧性与可变形性,能够保证注入地下时在地层裂缝中变形充填裂缝;具有良好的吸油膨胀性,5 h最大吸油膨胀量可以达到其干重的5倍;抗温达150℃,在150℃老化30 d仍然具有较高的抗压强度和变形特性;抗压强度是其他同类产品的20倍,正向封堵突破压力大于15 MPa,反向突破压力为0.9 MPa,能够满足防漏堵漏的要求。YDLJ-1在延长油田云页平1-1井石千峰组下部地层进行了试验,YDLJ-1用量2 t,钻井液漏失量比邻井减少30 m³,缩短堵漏时间2 d,其堵漏效果良好。
- 油基钻井液 /
- 堵漏剂 /
- 吸油膨胀 /
- 突破压力
Abstract: Fractures are usually highly developed in shale formations,making the shale easily swelling and breaking.Mud loss is another problem frequently encountered in shale drilling.To ensure hole stability,oil base drilling fluids are usually used and the losses of these expensive drilling fluids mean severe economic loss.To prevent the loss of oil base drilling fluids,an organophilic high molecular weight resin lost circulation material,YDLJ-1,has been developed.It has been proved that the YDLJ-1 has good stiffness and deformability,making it easy for the YDLJ-1 to fill the fractures through which the mud is lost.The capability of the YDLJ-1 to absorb oil makes it expandable,and in 5 h the volume of the YDLJ-1 that has absorbed oil is 5 times of its original volume.After ageing at 150℃ for 30 days,YDLJ-1 still retains certain compressive strength and deformability.The compressive strength of YDLJ-1 is 20 times that of the other similar products.Breakthrough pressure in forward direction against the surface of YDLJ-1 is greater than 15 MPa,and in backward direction against the surface of YDLJ-1 0.9 MPa,satisfying the needs for mud loss control.YDLJ-1 has been used in drilling the lower part of the Shiqianfeng formation penetrated by the Well Yunyeping-1 in Yanchang oilfield.2 ton of YDLJ-1 was used and the volume of mud loss was 30 m³ less than the offset well,time spent controlling the mud loss was shortened by 2 days,proving the efficiency of YDLJ-1 in mud loss control.
- Oil base drilling fluid /
- Lost circulation material /
- Expand through oil absorption /
- Breakthrough pressure

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参考文献(10)

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