吉林油田临参1井防漏堵漏技术研究

发布时间：2019-07-07 20:40

【摘要】：井漏是影响钻井作业安全的危害最严重的复杂情况之一,井漏的发生不仅会给钻井工程带来损失,如果得不到及时处理,还会引起井塌、井喷和卡钻等事故,甚至导致部分井段或全井段的报废,为油气资源的勘探开发带来极大困难。临参1井是鸭绿江盆地第一口区域探井,自2012年10月开钻以来,已发生多次漏失,造成了严重的经济损失。通过现场资料和地层情况分析,得出玄武岩由于气孔和裂隙发育造成了上部地层的恶性漏失,孔隙和微裂缝比较发育造成下部烟囱沟组地层的小漏到中漏。分别采取了桥堵加水泥浆堵漏的方法解决了上部地层的漏失,采用桥堵的方法解决了下部地层漏失。制定了全井段钻井液实施方案和堵漏措施,指导了现场施工。建立了天然裂缝条件下赫-巴流变模型钻井液的漏失模型,得出流变性参数是裂缝性地层钻井液漏失的重要影响因素,剪切稀释效应越强,钻井液的漏失速率越高,尤其是在漏失的最初阶段,最终漏失量受钻井液的动切力控制。从研究钻井液对漏失的影响的结果来看,使用堵漏材料并不是减少漏失的唯一途径。对于有裂缝的储层,堵漏材料会对储层造成永久的伤害。可以考虑将钻井液流变性调整与堵漏材料的使用结合来减少钻井液的漏失。利用模型,通过对现场数据进行定量的分析,可以得到裂缝宽度的估值。裂缝的宽度对于堵漏措施的制定非常有意义。利用该模型可以对裂缝宽度进行很好的估算。
[Abstract]:Well leakage is one of the most serious and complex situations that affect the safety of drilling operation. The occurrence of well leakage will not only bring losses to drilling engineering, but also cause well collapse, blowout, sticking and other accidents, and even lead to the scrapping of some wells or the whole section, which will bring great difficulties to the exploration and development of oil and gas resources. Linshen 1 well is the first regional exploration well in Yalu River Basin. Since the drilling began in October 2012, many leakage have occurred, resulting in serious economic losses. Through the analysis of field data and formation conditions, it is concluded that the malignant leakage of the upper strata caused by the development of pores and fissures in basalt is caused by the development of pores and microcracks, and the small leakage to middle leakage of the strata of the lower Qianggou formation is caused by the development of pores and microfractures. The method of bridge plugging and cement slurry leakage is adopted to solve the leakage of the upper formation, and the bridge blocking method is used to solve the leakage of the lower formation. The drilling fluid implementation scheme and plugging measures in the whole well section are worked out, and the field construction is guided. The leakage model of drilling fluid under natural fracture condition is established, and it is concluded that the Rheological parameters are an important factor affecting the leakage of drilling fluid in fracture formation. The stronger the shear dilution effect is, the higher the leakage rate of drilling fluid is. Especially in the initial stage of leakage, the final leakage is controlled by the dynamic shear force of drilling fluid. From the results of studying the effect of drilling fluid on leakage, the use of plugging material is not the only way to reduce leakage. For reservoirs with fractures, plugging materials will cause permanent damage to reservoirs. The Rheological adjustment of drilling fluid and the use of plugging materials can be considered to reduce the leakage of drilling fluid. By using the model and quantitative analysis of the field data, the estimation of crack width can be obtained. The width of cracks is very meaningful for the formulation of plugging measures. The crack width can be well estimated by using this model.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE28

【共引文献】