CAJ | 학술논문

水平井封隔器分段酸化技术作为各向异性油气藏中实现均匀酸化的一种重要增产措施，因而均匀酸化后表皮因子的研究变得至关重要。以水平气井井筒周围椭圆形污染带为基础，考虑酸液均匀改造污染带以及残酸返排对气体渗流的影响，将椭圆形伤害带内复合区域渗流问题划分为3个均质区域内流体的渗流，利用阻力叠加原理获得计算水平气井分段酸化后表皮因子新方法。实例分析表明：水平气井分段酸化后局部表皮因子沿井筒方向由跟端到趾端不断减小，且随着酸化半径以及酸化带渗透率的增大不断减小，而随着泥浆垂向最大浸入半径的增大而增大。研究为水平气井分段酸化表皮因子计算提供了一个新思路。
수평정봉격기분단산화기술작위각향이성유기장중실현균균산화적일충중요증산조시，인이균균산화후표피인자적연구변득지관중요。이수평기정정통주위타원형오염대위기출，고필산액균균개조오염대이급잔산반배대기체삼류적영향，장타원형상해대내복합구역삼류문제화분위3개균질구역내류체적삼류，이용조력첩가원리획득계산수평기정분단산화후표피인자신방법。실례분석표명：수평기정분단산화후국부표피인자연정통방향유근단도지단불단감소，차수착산화반경이급산화대삼투솔적증대불단감소，이수착니장수향최대침입반경적증대이증대。연구위수평기정분단산화표피인자계산제공료일개신사로。
Horizontal well staged acidizing with packer has been an important stimulation treatment to achieve uniform acidiz-ing in anisotropic reservoir,so the study of skin factor after staged acidizing is of great importance. Based on the elliptic damage zone near the horizontal gas well,the authors take by into consideration the uniform treatment by acids and influence of residual acid back flow on gas flow in the reservoir,and dividing the flow problem of composition area in elliptic damage zone into three flow problems in homogeneous region,taking advantage of resistance superposition theory,we eventually get a new method to calculate the skin factor of horizontal gas well after staged acidizing. The case study shows the local skin factor of horizontal gas well after staged acidizing becomes smaller from the heel to toe-end along the direction of wellbore;it also decreases with the increase of acidifying radius and permeability of acidizing zone,but increases with the increase of maximum immersion radius. The study in this paper will offer an new approach to the calculation of the skin factor of horizontal gas well after acidizing.