超细水泥封堵技术

PLUGGING TECHNIQUE WITH SUPERFINE CEMENT

曾俊 刘欣 王中华 郭恩常 任玉秀 杨春红

Zeng Jun Liu Xin Wang Zhonghua Guo Enchang Ren Yuxiu Yang Chunhong

河南石油勘探局勘探开发研究院, 河南南阳 473132

Exploration and Development Institute of Henan Petroleum Exploration Bureau

注水开发后期日益出现的地质问题及油套管的严重损坏,制约了油田的开发效果。针对河南油田注水开发中存在的上述问题,通过对超细水泥堵剂配方、堵剂性能、适应性等方面的研究,可实现对油井的高含水层、注水井的停注无用层、油水井套管外窜槽、穿孔、丝扣处的漏失等方面的封堵,取得了显著效果。自1998年8月-2001年12月在河南油田应用61井次,有效率85.3%,其中油井36井次,年度累计增油1.441×104t,降水7.6123×104m3;水井封堵25井次,累计增注14.32×104m3,控制无效注水16.95×104m3,创效益1800多万元,投入产出比达1:11.36,具有广泛的推广应用价值。

More and more geologic factors and seriously damaged tubings in after-development of water injection have influenced development effect.According to above problems exist in water injection development in Henan Oilfield, formulation, performance and adaptability and so on of water shutoff agent of superfine cement have been studied.At last the study have gained evidence plugging effect, the agent can plug high water cut oil well formation of oil well, abandoned un-injection formulation of water injection well, channeling, perforation and leaking in thread on outside casing of oil and water well.During the period From August 1998 to December 2001, the technique was used in wells 61 times, 36 of which were in oil wells and 25 in water wells, It’s efficiency has attained to 85.3%.Oil Production total incresed 1.441 ×104 t, water amount decresed to 7.6123 ×104 m3 yearly.Injection wells increased water amount by 14.32×104 m3, the amount of non-effective injecting water is controlled by 16.95×104 m3, and gained 18.52 million RMB, input-output ratio is 1:11.36, so the technique is worth being widely popularized.

10.3969/j.issn.1000-7393.2002.05.021