CAJ | 학술논문

针对实际油藏开发中，井筒流动阻力对等压线分布影响认识不清的问题。开展了相应实验研究，研究中采用改进的电模拟实验方法：测量了多分支井近井地带三维势分布；在井模型上焊接碳膜电阻模拟井筒流动阻力对等压线分布的影响；测量了不同电解质溶液浓度下等压线分布变化。实验结果表明：分支井在近井空间内的等势面与井的形状相似并呈弧面向外凸起；考虑井筒阻力时水平井等压线呈鸡蛋形而非椭圆形，井控面积减少，近井地带存在压降使得等压线穿过井筒所在位置；低渗状态下分支井井控面积更大，各分支贡献更明显，有利于开采。对于研究实际条件下，多分井的控制体积具有较高的指导意义。
침대실제유장개발중，정통류동조력대등압선분포영향인식불청적문제。개전료상응실험연구，연구중채용개진적전모의실험방법：측량료다분지정근정지대삼유세분포；재정모형상한접탄막전조모의정통류동조력대등압선분포적영향；측량료불동전해질용액농도하등압선분포변화。실험결과표명：분지정재근정공간내적등세면여정적형상상사병정호면향외철기；고필정통조력시수평정등압선정계단형이비타원형，정공면적감소，근정지대존재압강사득등압선천과정통소재위치；저삼상태하분지정정공면적경대，각분지공헌경명현，유리우개채。대우연구실제조건하，다분정적공제체적구유교고적지도의의。
The effects of wellbore flow resistance and permeability on equi-pressure contour distribution is unclear in reservoir development,so the modified electrolytic simulation experiment was carried out. Nearwellbore 3-D potential distribution of multi-lateral wells was measured;the effects of wellbore flow resistance and permeability on equipressure contour distribution were studied with a film resistors well model and different concentration of the electrolyte respectively. The results show that the equipotential surface was cambered outward convex,that the surface shape in the nearwellbore space was similar to well architecture;that equipressure contours were egg-shaped rather than oval when considering the resistance of the wellbore,and that the control area decreased. Since nearwellbore pressure drop existsed,the equipressure contours passed through the well-bore location. The drainage area extended and each branch contributed more effectively in low permeability reservoirs. The results will have a great significance in determining the drainage area of multi-lateral wells.