新型有机正电胶钻井液体系的研究与应用

STUDY AND APPLICATION OF NEWLY ORGANIC CATIONIC GEL DRILLING FLUID

王学英 魏军 李元启

Wang Xueying Wei Jun Li Yuanqi

中原石油勘探局钻井工程技术研究院, 河南濮阳 457001

Drilling Engineering Technology Research Institute of Zhongyuan Petroleum Exploration Bureau, Puyang 457001, He’nan

针对中原油田极其复杂的地层情况(多断块、高温、高盐),通过大量试验,研制开发出了钻井液用新型有机正电胶WPS,并对其抗污染、配伍性、抗温、润滑性、抑制性、保护油气层性能进行了室内试验。试验表明,有机正电胶WPS在耐温、抗盐抗钙、防塌、润滑及提高渗透率恢复值等方面具有较好的效果,采用新型有机正电胶WPS配制的新型有机正电胶钻井液体系抗温达150℃,抗盐可达饱和,渗透率恢复值大于80%。使用新型有机正电胶聚合物钻井液体系分别在刘侧20-2、文72-169、白46等20口井上进行了现场试验,现场应用表明,该体系具有强剪切稀释性、强悬浮携砂性、强抑制性和油层保护性能,可进一步推广应用。

According to the complex formation complexion of stratum of ZPEB (multi-fault,high temperature,condensing salt),a novel drilling fluid additives-organic positive gel (WPS) is developed through many tests.Results in laboratory showed that organic positive gel (WPS) has good effects in temperature-resisting,salt-resisting,collapse-preventing,lubrication properties and formation protection.The novel drilling fluid system of organic positive gel can be applied in saturation salt solution,stable at 150℃ and the value of durchgriff reversion was more than 80%.The new system was applied as field experiment in 20 wells such as liu (side tracking) 20-2,wen 72-169 and bai 46 etc.In-situ application indicated that the new system had strong dilution shearing property,good cutting carrying capacity,strong inhibition property to shale and strong reservoir protecting ability.

10.3969/j.issn.1000-7393.2005.06.010