【摘要】：在低滲透油藏開發(fā)中廣泛使用菱形反九點(diǎn)井網(wǎng),但針對不同位置生產(chǎn)井及注水井的裂縫縫長配比關(guān)系還缺少廣泛深入的研究�；陂L慶油田某低滲透油藏參數(shù),建立了數(shù)值模擬模型,在菱形反九點(diǎn)井網(wǎng)中分別設(shè)置不同的邊井、角井和注水井裂縫穿透比,研究不同裂縫配置模式對水驅(qū)開發(fā)效果的影響。流線模擬及數(shù)值模擬計(jì)算結(jié)果表明,在注水開發(fā)中,注水井縫長是影響油田產(chǎn)液量及水驅(qū)效果的關(guān)鍵因素;邊井裂縫較角井裂縫更易見水,對油田綜合含水影響較大,在菱形反九點(diǎn)井網(wǎng)中需要進(jìn)行不等縫長優(yōu)化設(shè)計(jì);邊井裂縫縫長對水驅(qū)效果的影響分為早、中、晚期(Ⅰ、Ⅱ、Ⅲ)曲線段,隨著注水井裂縫穿透比增加,早期(Ⅰ)曲線段增長,中期(Ⅱ)曲線段縮短,而晚期(Ⅲ)曲線段變化較小;隨著角井裂縫穿透比增加,采出程度逐漸增大,當(dāng)角井裂縫穿透比較大時,存在"反轉(zhuǎn)"現(xiàn)象;隨著注水井裂縫穿透比增加,角井裂縫優(yōu)化穿透比減小,而邊井裂縫優(yōu)化穿透比增加。該研究成果對于指導(dǎo)低滲透油藏菱形反九點(diǎn)井網(wǎng)裂縫優(yōu)化設(shè)計(jì),提高波及系數(shù)和開發(fā)效果具有重要的指導(dǎo)意義。
[Abstract]:Rhomboid reverse nine-point well pattern is widely used in the development of low permeability reservoirs, but there is still a lack of extensive and in-depth research on the relationship between fracture length and fracture length of production wells and injection wells in different positions. Based on the parameters of a low permeability reservoir in Changqing Oilfield, a numerical simulation model is established. Different fracture penetration ratios of edge wells, angle wells and water injection wells are set up in the rhombic reverse nine point well pattern, and the effects of different fracture configuration modes on the development effect of water drive are studied. The results of streamline simulation and numerical simulation show that the fracture length of injection well is the key factor affecting the liquid production and water drive effect of oil field in water injection development, and the fracture of side well is more likely to see water than that of angle well, which has great influence on the comprehensive water cut of oil field, so it is necessary to optimize the unequal fracture length in rhomboid reverse nine point well pattern. The influence of fracture length on water drive effect is divided into early, middle and late (鈪，

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