石油钻采工艺2018，Vol.40Issue(1)：20-26,7.DOI:10.13639/j.odpt.2018.01.004
杨税务潜山高温油气藏勘探突破的关键井筒技术
Key wellbore technologies for the exploration breakthrough of high-temperature oil and gas reservoirs in Yangshuiwu buried hill
摘要
Abstract
Yangshuiwu buried hill is one major exploration area in Jizhong depression and its exploration prospect is promising. Well AT1x is a wildcat well in this area, and its total depth is 5 496 m. The reservoir temperature is over 180 ℃ and the formations drilled in this well are lithologically complex. And the wellbore operation is faced with a series of difficulties in terms of rate of penetra-tion (ROP) improvement, borehole wall anti-sloughing, reservoir evaluation, reservoir stimulation, etc. In this paper, the key wellbore technologies for the exploration and development of high-temperature buried hill oil reservoirs were researched. The first is drilling fluid technology. Fractures are discovered through scanning electron microscope (SEM), and correspondingly the drilling fluid of KCl composite salt is added with polyamine inhibitor and nano anti-sloughing blocking agent. Thus, the blocking capacity of drilling fluid is improved and the average hole enlargement ratio is less than 10%. The second is drilling bit selection technology. The PDC bit and its support ROP improvement tool are selected, and consequently the average ROP is increased to 4.11 m/h while the average ROP of its comparable well is 1.94 m/h. The third is logging technology. A series of integrated conventional logging+imaging+dipole acoustic imaging logging technologies are adopted. As a result, the fractures and cavities near the well can be also described precisely so as to pro-vide the basis for reservoir evaluation and fracturing layer selection. And the fourth is fracturing stimulation technology. The SRV acid fracturing technology suitable for high-temperature fractured carbonate reservoirs is developed by combining in-depth fracture commu-nicating technology with stimulated reservoir volume (SRV). And by virtue of this technology, daily gas production and oil production of Well AT1x after acid fracturing is kept at 41×104m3and 71 m3, respectively during the production test. And as a result, new exploration breakthrough is realized in the deep buried hills in northern Jizhong depression. These technologies settle down the wellbore difficulties during the development of Yangshuiwu buried hill in Jizhong depression, and provide the candidate technologies for the development of high-temperature fractured oil reservoirs by means of deep wells.关键词
钻井/冀中坳陷/杨税务潜山/高温油藏/储层评价/钻井液/测井/压裂/机械钻速Key words
well drilling/Jizhong depression/Yangshuiwu buried hill/high-temperature oil reservoir/reservoir evaluation/drilling fluid/logging/fracturing/rate of penetration (ROP)分类
能源科技引用本文复制引用
张以明,李拥军,崔树清,唐鸿斌,李振选,王东明..杨税务潜山高温油气藏勘探突破的关键井筒技术[J].石油钻采工艺,2018,40(1):20-26,7.基金项目
中国石油天然气股份有限公司重大科技专项"华北油田上产稳产800万吨关键技术研究与应用"(编号:2014E035). （编号:2014E035）
