|本期目录/Table of Contents|

[1]梁 豪 郭书生 廖高龙.莺琼盆地乐东区非欠压实成因超压随钻监测技术与应用[J].中国海上油气,2020,32(04):147-151.[doi:10.11935/j.issn.1673-1506.2020.04.018]
　LIANG Hao GUO Shusheng LIAO Gaolong.Application of pressure-monitoring technology while drilling in non-undercompaction overpressure formation in Ledong area of Yingqiong basin[J].China Offshore Oil and Gas,2020,32(04):147-151.[doi:10.11935/j.issn.1673-1506.2020.04.018]
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莺琼盆地乐东区非欠压实成因超压随钻监测技术与应用()

《中国海上油气》[ISSN:1673-1506/CN:11-5339/TE]

卷:
第32卷
期数:
2020年04期
页码:
147-151
栏目:
钻采工程
出版日期:
2020-07-25

文章信息/Info

Title:
Application of pressure-monitoring technology while drilling in non-undercompaction overpressure formation in Ledong area of Yingqiong basin
文章编号:
1673-1506(2020)04-0147-05
作者:
梁 豪 郭书生 廖高龙
(中海石油(中国)有限公司湛江分公司 广东湛江 524057)
Author(s):
LIANG Hao GUO Shusheng LIAO Gaolong
(CNOOC China Limited, Zhanjiang Branch, Zhanjiang, Guangdong 524057, China)
关键词:
莺琼盆地;  欠压实;  超压;  随钻;  地层压力监测
Keywords:
Yingqiong basin;  uncompacted;  overpressure;  while drilling;  formation pressure monitoring
分类号:
TE27+1
DOI:
10.11935/j.issn.1673-1506.2020.04.018
文献标志码:
A
摘要:
莺琼盆地乐东区超高温超高压气藏钻井安全压力窗口极窄,同一井段各砂体间孔隙压力存在差异台阶,为地层压力监测提出了挑战。结合乐东区多口探井资料,分析了该区2套超高温超高压地层超压成因及相应的随钻地层压力监测模型与参数,结果表明:乐东区地层超压成因主要为流体膨胀/传导型超压,属卸载型超压,地层超压成因机制的不同是欠压实地层压力监测技术不能用于该区的原因; 卸载型超压最优监测参数为声波时差与电阻率,但受储层流体及灰质含量影响,乐东区超压段电阻率无法反应地层压力变化,只能采用声波时差进行地层压力监测; 采用随钻声波、中途VSP以及优选的地层压力监测模型与参数,能够实现钻头处及前方地层压力的精细分析,确保井身结构合理。本文研究成果已在莺琼盆地乐东区8口超高温高压探井地层压力监测中取得成功应用,地层压力监测精度达98%以上,具有较好的推广应用价值
Abstract:
The Archaean buried hill formation in BZ19-6 large gas field can be characterized by large burial depth, high compressive strength, poor drillability and strong abrasiveness, which results in low rate of penetration(ROP), long drilling cycle and high drilling cost of conventional PDC bit. In view of the formation characteristics and drilling technical difficulties, a Ninja teeth PDC bit associated with the torsional impactor was proposed to improve the ROP in deep buried hill hard formations drilling. This technology has been successfully applied in 10 wells in BZ19-6 large gas field: the average footage of a single bit is 65.5 m and the average ROP is 4.77 m/h, which is 135.46% and 114.77% faster than that of the conventional motor + PDC bit, respectively. Therefore, we can infer that this technology can greatly shorten the drilling cycle, significantly improve the economic benefits, and provide a reference for ROP improvement in buried hill hard formations drilling of similar deep and ultra-deep wells

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备注/Memo

备注/Memo:
收稿日期:2019-01-07 改回日期:2019-04-30*中海石油(中国)有限公司湛江分公司综合科研项目“钻头前地层压力随钻预测方法研究(编号:ZYKY-2020-ZJ-03)”部分研究成果。 第一作者简介: 梁豪,男,工程师,2014年毕业于西南石油大学油气田开发工程专业,主要从事海上探井地质作业与科研工作。地址:广东省湛江市坡头区南调路22号信箱(邮编:524057)。E-mail: lianghao8@cnooc.com.cn。
更新日期/Last Update: 2020-07-20