CAJ | 학술논문

Azadegan#H1井为伊朗石油勘探开发公司在该油田部署的第一口水平井,水平段长900 m,完钻井深为3 905 m,垂深为2 760 m,钻井周期为87 d.该井的钻井液施工难点为:从Aghajari地层到Savark地层均易发生漏失,其中Gachsaran地层出现完全漏失的可能性极大;Gachsaran地层存在高压盐水层;Pabdeh、Ilam和Lafan地层的大段泥质灰岩和泥页岩水敏性较强,井壁坍塌扩径严重;水平井段井眼清洁问题等.该井一开用PAC-HV膨润土钻井液,二开用KCl-聚合物钻井液,三开使用饱和盐水钻井液,四开使用KCl-聚合物钻井液,五开用盐水-聚合物钻井液,并通过使用相应的维护处理措施,顺利实现了安全、快速钻井要求.
Azadegan#H1정위이랑석유감탐개발공사재해유전부서적제일구수평정,수평단장900 m,완찬정심위3 905 m,수심위2 760 m,찬정주기위87 d.해정적찬정액시공난점위:종Aghajari지층도Savark지층균역발생루실,기중Gachsaran지층출현완전루실적가능성겁대;Gachsaran지층존재고압염수층;Pabdeh、Ilam화Lafan지층적대단니질회암화니혈암수민성교강,정벽담탑확경엄중;수평정단정안청길문제등.해정일개용PAC-HV팽윤토찬정액,이개용KCl-취합물찬정액,삼개사용포화염수찬정액,사개사용KCl-취합물찬정액,오개용염수-취합물찬정액,병통과사용상응적유호처리조시,순리실현료안전、쾌속찬정요구.
Horizontal well Azadegan H1, having a horizontal length of 900 m, a completion depth of 3,905 m, and a vertical depth of 2,760 m, was drilled in 87 days. Difficulties encountered during drilling opera- tion included the following: mud losses in formations between Aghajari and Savark, especially the Gachsa-ran formation in which complete mud loss may be encountered; high pressure saltwater zones in Gachsaran formation; argillaceous limestone and water sensitive shales in Pabdeh, Ilam and Lafan formations, and hole cleaning in the horizontal sections. Drilling fluids used in the four intervals were a high viscosity PAC/bentonite fluid, a KCl/polymer mud, a saturated saltwater mud, a KCl/polymer fluid and a saltwa-ter polymer fluid, respectively. By properly maintaining the rheology and filtration property of these drill-ing fluids, the well was drilled smoothly and fast.