石油钻采工艺Issue(5)：131-133,3.DOI:10.13639/j.odpt.2014.05.033
水平井井下取样找水技术
Technology for water exploration by sampling in horizontal wells
王百 1常莉静 2罗有刚 1郭靖2
作者信息
- 1. 长庆油田公司油气工艺研究院，陕西西安 710018
- 2. 低渗透油气田勘探开发国家工程实验室，陕西西安 710018
- 折叠
摘要
Abstract
Water breakthrough is one of the key problems occurred in staged fracturing or water injected horizontal wells in Changqing Oilifeld. After water breakthrough, water cut increases rapidly and production capacity decreases abruptly, which seriously restricts the efifcient development and large-scale application of horizontal wells. Water exploration technology is a prerequisite for controlling water and stabilizing oil production. Conventional technology has a very long period of water exploration (60-80 days) and high costs (800 000 Yuan/time for production proifle test) due to the number of test stages, which cannot meet the large-scale develop-ment of horizontal wells in Changqing Oilifeld. A downhole sampler has been developed by innovation, which meets the 75℃and 40 MPa downhole sampling conditions in indoor evaluation tests;the sampling timing and manner have been further established according to the varying pattern of production performance in ifeld test wells, and hence a full set of downhole sampling and water exploration technology has been developed, which shortens the water exploration period to 6-7 days and the cost to 200 000 Yuan/time. This shows that downhole sampling and water exploration technology has been greatly optimized in terms of ifeld test and economic beneifts, and provides an economic and effective technical means for water exploration method in horizontals in Changqing Oilifeld.关键词
水平井/井下取样/找水/长庆油田Key words
horizontal well/downhole sampling/water exploration/Changqing Oilifeld分类
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王百,常莉静,罗有刚,郭靖..水平井井下取样找水技术[J].石油钻采工艺,2014,(5):131-133,3.
