[1]赵宏波,季伟,王冲,等.榆林气田标志层法和沉积旋回法水平井导向技术[J].石油钻探技术,2018,46(06):39-46.[doi:10.11911/syztjs.2018113]
 ZHAO Hongbo,JI Wei,WANG Chong,et al.A Geo-Steering Technique Using Marker and Sedimentary Cycles in Horizontal Well Drilling in the Yulin Gas Field[J].Petroleum Drilling Techniques,2018,46(06):39-46.[doi:10.11911/syztjs.2018113]
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榆林气田标志层法和沉积旋回法水平井导向技术(/HTML)
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《石油钻探技术》[ISSN:1001-0890/CN:11-1763/TE]

卷:
46卷
期数:
2018年06期
页码:
39-46
栏目:
钻井完井
出版日期:
2018-11-25

文章信息/Info

Title:
A Geo-Steering Technique Using Marker and Sedimentary Cycles in Horizontal Well Drilling in the Yulin Gas Field
作者:
赵宏波 季伟 王冲 李兴宝 陈国飞
中国石油长庆油田分公司第二采气厂, 陕西西安 710021
Author(s):
ZHAO Hongbo JI Wei WANG Chong LI Xingbao CHEN Guofei
The No.2 Gas Production Plant, PetroChina Changqing Oilfield Company, Xi’an, Shaanxi, 710021, China
关键词:
水平井水平段标志层沉积层地质导向榆林气田
Keywords:
horizontal wellhorizontal sectionmarkersedimentary cyclegeo-steeringYulin Gas Field
分类号:
TE242
DOI:
10.11911/syztjs.2018113
摘要:
针对鄂尔多斯盆地榆林气田水平井钻进山23砂体时存在的入窗困难和入窗后井眼偏离气层段穿行等难题,分析了该气田30多口井的沉积层序和山23砂体沉积韵律,发现山2段发育3套距山23砂体厚度稳定的煤系地层,山23砂体由多个正韵律单砂体在垂向上叠加而成。因此,将煤系地层作为标志层预测山23砂体顶界垂深,形成了标志层法水平井入窗导向技术;将山23砂体沉积旋回特征与钻时、岩屑、气测值和随钻伽马变化特征结合,形成了沉积旋回法水平段穿行导向技术。该技术在YuH1井和YuH2井进行了应用,砂岩钻遇率分别达到了98.2%和95.6%。标志层法和沉积旋回法水平井导向技术为水平井准确入窗和提高砂岩钻遇率提供了高效的地质导向方法。
Abstract:
In order to solve the difficulty of entering the horizontal well of the Shan 23 sand body of the Yulin Gas Field in the Ordos Basin and the problem of deviation of the wellbore from the gas layer after entering the window,the sedimentary sequence of more than 30 wells and the sedimentary rhythm of the Shan 23 sand body in the Yulin Gas Field were studied.It is found that there are three sets of coal-bearing strata in the Shan 2 approximately the same distance to the Shan 23 sand body,and the Shan 23 sand body is superimposed by a plurality of positive cyclothemic vertical single sand bodies.Therefore,the coal-bearing strata were used as the marker to predict the top boundary of the Shan 23 sand body,and the marker based window entering method for horizontal wells was developed.The sedimentary characteristics of the Shan 23 sand body were combined with the variation characteristics of drilling time,cuttings,gas measurement and Gamma ray while drilling to establish the sedimentary cycle based horizontal section geo-steering technique.Through those techniques applied in the Well YuH1 and YuH2,sidetracking was eliminated,and the encountering rate of sandstone reached 98.2% and 95.6%,respectively.The marker layer method and the sedimentary cycle horizontal well guidance technology provide an efficient geosteering method for accurate horizontal window entry and improved sandstone drilling rate

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备注/Memo

备注/Memo:
收稿日期:2018-03-26;改回日期:2018-08-20。
作者简介:赵宏波(1976-),男,甘肃镇原人,1999年毕业于江汉石油学院地质专业,高级工程师,主要从事地质勘探、钻井、完井和油气藏开发方面的研究。
E-mail:2290236948@qq.com。
更新日期/Last Update: 1900-01-01