CAJ | 학술논문

基于拟稳态等效井径模型、裂缝内变质量线性流模型、水平井筒变质量流模型和完井表皮系数模型,根据势叠加与连续性原理,建立压裂水平井裂缝变质量流与油藏渗流的耦合模型,分析裂缝半长、裂缝宽度、裂缝渗透率对水平井筒和裂缝的入流速度及压力降分布、压裂水平井产能的影响.结果表明:随裂缝半长、裂缝宽度、裂缝渗透率增大,水平井段入流速度、产量减小,压裂水平井和裂缝产量增大;裂缝宽度越宽、裂缝渗透率越大,裂缝入流速度越大,裂缝内压降损失越小;越靠近外侧的裂缝入流速度越快,裂缝内压力损失越大.
기우의은태등효정경모형、렬봉내변질량선성류모형、수평정통변질량류모형화완정표피계수모형,근거세첩가여련속성원리,건립압렬수평정렬봉변질량류여유장삼류적우합모형,분석렬봉반장、렬봉관도、렬봉삼투솔대수평정통화렬봉적입류속도급압력강분포、압렬수평정산능적영향.결과표명:수렬봉반장、렬봉관도、렬봉삼투솔증대,수평정단입류속도、산량감소,압렬수평정화렬봉산량증대;렬봉관도월관、렬봉삼투솔월대,렬봉입류속도월대,렬봉내압강손실월소;월고근외측적렬봉입류속도월쾌,렬봉내압력손실월대.
Based on uniform flux pseudo-steady state equivalent wellbore radius model, variable mass linear flow model of fractures , variable mass flow model of horizontal wellbore and completion skin factor model, according to the principle of potential superposition and continuity, a coupling model of variable mass flow in fractures and percolation in reservoir was developed. The influences of fractures half length, width and permeability on the inflow velocity and pressure drop distribution of horizontal wellbore, the inflow velocity and pressure drop distribution of fractures and the productivity of fractured horizontal wells were analyzed. The results show that, with the increase of fracture half length, width and permeability, the inflow velocity and output of horizontal section decrease and the output of whole fractured horizontal well and fractures increase. With the increase of fracture width and permeability, the inflow velocity of fracture increases and the pressure drop loss of fractures decreases. The inflow velocity and the pressure drop loss of fractures are relatively high when the fractures are far away from the wellbore.