下扬子地区页岩气井失返性漏失堵漏技术研究——以WY-1HF井为例

doi:10.13809/j.cnki.cn32-1825/te.2021.02.017

油气藏评价与开发 ›› 2021, Vol. 11 ›› Issue (2): 256-260.doi: 10.13809/j.cnki.cn32-1825/te.2021.02.017

下扬子地区页岩气井失返性漏失堵漏技术研究——以WY-1HF井为例

李大勇¹(),肖超²(),王胜建¹,赵小祥²,朱迪斯¹,刘浩亚²

1.中国地质调查局油气资源调查中心,北京 100083
2.中国石化石油工程技术研究院,北京 100101

收稿日期:2020-09-30 出版日期:2021-04-26 发布日期:2021-04-30
通讯作者: 肖超 E-mail:brv-lee@163.com;xiaochao.sripe@sinopec.com
作者简介:李大勇（1971—）,男,本科,高级工程师,现主要从事钻井技术管理工作。地址：北京市海淀区北四环奥运大厦,邮政编码：100083。E-mail: brv-lee@163.com
基金资助:
“十三五”国家重大专项“海上复杂地层安全快速钻完井关键技术”(2016ZX05033004-002);中国石化科技部项目“尼日利亚、喀麦隆复杂地层钻井关键技术研究”(PE19009-1);中国地质调查局项目“合肥盆地及周缘油气资源战略调查”(DD20190725)

Plugging technology applied for total loss in shale gas wells of Lower Yangtze Region: Taking Well-WY-1HF as an example

LI Dayong¹(),XIAO Chao²(),WANG Shengjian¹,ZHAO Xiaoxiang²,ZHU Disi¹,LIU Haoya²

1. Oil and Gas Survey Center, China Geological Survey, Beijing 100083, China
2. Sinopec Research Institute of Petroleum Engineering, Beijing 100101, China

Received:2020-09-30 Online:2021-04-26 Published:2021-04-30
Contact: XIAO Chao E-mail:brv-lee@163.com;xiaochao.sripe@sinopec.com

摘要/Abstract

摘要：

目前,国内页岩气钻井发生漏失情况比较普遍,适用于油基钻井液的堵漏方法不多,失返性漏失仍是业内技术人员面临的难题。以WY-1HF井现场作业为例,使用油基钻井液在该井水平段钻井时发生失返性恶性漏失,且使用常规的桥塞堵漏技术、油井水泥堵漏技术均不能有效封堵漏失层。在对该井漏失层特征分析的基础上,研究了无机凝胶的堵漏机理及桥塞堵漏材料对油基钻井液性能的影响规律,最终采用高密度（1.89 g/cm³）的水泥固化封堵结合低密度（1.17 g/cm³）无机凝胶固化封堵,配合使用油基钻井液高浓度大颗粒桥塞堵漏浆,堵漏成功,保障了后续通井、测井、下套管、固井等作业的顺利开展。该方法的成功实施对该地区页岩气堵漏技术的应用具有一定的借鉴意义。

关键词: 低密度凝胶堵漏, 水泥堵漏, 桥塞堵漏, 失返性漏失, 页岩气水平段, 下扬子地区

Abstract:

At present, the leakage of shale gas drilling is quite common in China, and there are few plugging methods suitable for oil-based drilling fluid. The total loss of drilling fluid is still a difficult problem for technicians in the industry. Taking the field operation of Well-WY-1HF as an example, during the drilling of its horizontal well interval by using oil-based drilling fluid, the conventional plugging technology of bridge plug and cement plugging technology of oil well can not work efficiently. Based on the analysis of the characteristics of the loss zones, the effect of different plugging material of oil-base drilling fluid performance have been studied to determine the formula for successful plugging, that is high density （1.89 g/cm³） cement solidified plugging combined with low density （1.17 g/cm³） inorganic gel curing plugging, cooperating with the use of bridge plug with high concentration and large particle. It ensures the subsequent drifting, well logging, the casing and cementing operation smoothly. The successful implementation of this method provides certain reference for the application of shale gas plugging technology in the same area.

Key words: plugging by low density gel, cement plugging, total loss, bridge plugging, horizontal well interval for shale gas, Lower Yangtze Region

中图分类号:

TE28.3

李大勇,肖超,王胜建,赵小祥,朱迪斯,刘浩亚. 下扬子地区页岩气井失返性漏失堵漏技术研究——以WY-1HF井为例[J]. 油气藏评价与开发, 2021, 11(2): 256-260.

LI Dayong,XIAO Chao,WANG Shengjian,ZHAO Xiaoxiang,ZHU Disi,LIU Haoya. Plugging technology applied for total loss in shale gas wells of Lower Yangtze Region: Taking Well-WY-1HF as an example[J]. Reservoir Evaluation and Development, 2021, 11(2): 256-260.

图/表 2

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油基钻井液配方	破乳电压（V）
基浆	1 200
基浆+20 %刚性堵漏剂	1 100
基浆+10 %复合堵漏剂	115
基浆+20 %核桃壳	650
基浆+10 %承压堵漏剂	1 100
基浆+5 %棉籽壳	350
基浆+5 %弹性石墨	1 150
基浆+10 %碳酸钙	1 150

油基钻井液堵漏配方		破乳电压（V）
井浆		1 200
配方一	基础配方：井浆+11 %刚性堵漏剂+15 %复合堵漏剂+2 %复合橡胶粒子+2 %改性竹纤维+2 %弹性石墨	125
配方一	补充乳化剂：2 %主乳化剂+2 %辅乳化剂	450
配方二	基础配方：井浆+5 %刚性堵漏剂+20 %复合堵漏剂+1 %棉籽壳+2 %双亲承压堵漏剂+12 %核桃壳	45
配方二	补充乳化剂：2 %主乳化剂+2 %辅乳化剂	420
配方三	基础配方：井浆+19 %核桃壳+7 %竹纤维+2 %双亲承压剂+10 %复合堵漏剂+1 %棉籽壳+2 %复合橡胶封堵剂	120
配方三	补充乳化剂：2 %主乳化剂+2 %辅乳化剂	480

下扬子地区页岩气井失返性漏失堵漏技术研究——以WY-1HF井为例

Plugging technology applied for total loss in shale gas wells of Lower Yangtze Region: Taking Well-WY-1HF as an example

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