CAJ | 학술논문

在雅克拉-大涝坝凝析气田修井作业过程中易发生修井液大量漏失而导致黏土膨胀、速敏、微粒运移以及润湿性改变等问题,引起较严重的储层损害.针对该气田储层特点,研究出了油溶暂堵型低伤害修井液,并利用离心法、页岩防膨法、API堵漏模拟实验以及沉降稳定等实验方法,优选出了适合该区块油溶暂堵型修井液的黏土稳定剂、表面活性剂、堵漏剂和悬浮增黏剂.性能评价结果表明,该修井液具有油溶暂堵功能,适用温度范围广;岩心渗透率恢复率达到85%以上,具有明显的储层保护效果;具有良好的流变性能,能满足现场施工要求.
재아극랍-대로패응석기전수정작업과정중역발생수정액대량루실이도치점토팽창、속민、미립운이이급윤습성개변등문제,인기교엄중적저층손해.침대해기전저층특점,연구출료유용잠도형저상해수정액,병이용리심법、혈암방팽법、API도루모의실험이급침강은정등실험방법,우선출료괄합해구괴유용잠도형수정액적점토은정제、표면활성제、도루제화현부증점제.성능평개결과표명,해수정액구유유용잠도공능,괄용온도범위엄;암심삼투솔회복솔체도85%이상,구유명현적저층보호효과;구유량호적류변성능,능만족현장시공요구.
In the workover operation in Yakela-Dalaoba condensate gas field, workover fluid loss into the formation upon which the workover fluid contacted always resulted in reservoir damage. Based on the char-acteristics of the reservoir, a low damage workover fluid containing an oil-soluble temporary plugging a-gent was formulated with clay stabilizer, surfactant, LCM and viscosifier selected through laboratory ex-periments and evaluation. Core flow test results showed that the percent permeability recovery was as high as 85%. Other properties of the workover fluid were all satisfactory regarding to the field application re-quirement.