吐哈西部油田井壁失稳机理实验研究  

Experimental study on sidewall instability mechanism of oil wells in the western Tuha Oilfield

作　　者：黄维安[1] 邱正松[1] 徐加放[1] 于连香[1] 

机构地区：[1]中国石油大学石油工程学院,山东东营257061

出　　处：《石油学报》2007年第3期116-119,123,共5页Acta Petrolei Sinica

基　　金：中国石油天然气股份有限公司科技攻关项目(03B2010100)部分成果

摘　　要：在勘探开发过程当中,吐哈油田西部的葡北、神泉和雁木西区块存在着严重的井壁不稳定等原因导致的划眼、卡钻、电测遇阻遇卡、固井留塞等问题。利用X射线衍射、电镜扫描、电动电位分析和泥页岩压力传递实验研究新技术,以及比亲水量测试等实验手段,对吐哈西部油田岩样的结构及理化性能进行了系统分析,论述了该地区复杂地层井壁失稳机理。依据“多元协同”防塌理论,通过单剂优选和配方优化实验,研制出了适合吐哈西部油田地层特性的钾-钙-醇强化防塌钻井液体系。现场试验结果表明,该钻井液体系能满足现场使用的要求。Some problems have been encounted,such as hole redressing,drill pipe sticking,preventing and blocking electrical logging and leaving plug in well cementation caused by sidewall instability during exploration and exploitation of Pubei,Shenquan and Yanmuxi areas in the western Tuha Oilfield. The fabric and physical-chemical properties of rock samples in the western Tuha Oilfield were analyzed by X-ray diffraction, SEM, specific hydrophilic capacity measuring, zeta-potential analysis, and experimental technique of clay shale pressure transmission. The sidewall instability mechanism of these areas was discussed. According to the ＂multi-component combination＂ anti-sloughing theory, the potassium-calcium-alcohol intensive anti-sloughing drilling fluid suitable to the formation of the western Tuba Oilfield was developed by selecting all kinds of additives and optimizing formulation. The results of field test showed that this kind of drilling fluid can meet the requirement of oilfield.

关 键 词：吐哈油田 井壁稳定性 失稳机理 防塌钻井液 实验研究 

分 类 号：TE256[石油与天然气工程—油气井工程]