發(fā)布時間：2018-04-12 20:47

  本文選題：低滲透油藏 + 活性水壓裂��； 參考：《西安石油大學》2015年碩士論文

【摘要】：水力壓裂是油氣井增產和注水井增注的重要增產措施,是提高低滲透油氣藏開發(fā)效果的有力手段。隨著低滲透油藏的大規(guī)模開發(fā),水力壓裂作為一種有效改善地層滲流條件的手段,被廣泛使用。吳起油田開發(fā)已有多年,作為一個低滲透油藏,注水開發(fā)已經成為吳起油田保持地層能量,維持油田長期穩(wěn)產所必須采取的措施,然而由于油藏在開發(fā)過程中不同程度都會受到污染,所以在實施注水開發(fā)時,常常出現注水壓力上升,甚至注不進水的情況,通過采用傳統(tǒng)的凍膠壓裂液壓裂增注措施來接觸近井地帶的地層污染來提高注水量,降低注水壓力,但是由于凍膠壓裂液在措施后液體抽汲返排時間長,大分子殘液滯留容易造成地層堵塞,對油藏儲層造成傷害,大大降低注水井增注效果。然而活性水壓裂技術在改造這種低滲透油藏方面具有很大的優(yōu)勢,活性水壓裂技術是經過一定化學添加劑混合的清水作為壓裂液,與常規(guī)凍膠壓裂相比,在造縫機理、裂縫延伸及裂縫形態(tài)上存在差異。本文通過對活性水壓裂破裂機理的研究,在清水壓裂的基礎上,改善指導活性水壓裂優(yōu)化設計,結合吳起油田注水井增注措施的實際情況,采用理論指導,軟件參數模擬,現場應用實例分析等多種途徑,給出了活性水壓裂技術增注在吳起油田的成功應用案例,提高了低滲透油藏注水井增注效果,為低滲透油田注水開發(fā)提供了可靠的技術支撐。
[Abstract]:Hydraulic fracturing is an important measure to increase production of oil and gas wells and injection wells, and is a powerful means to improve the development effect of low permeability reservoirs.With the large-scale development of low permeability reservoirs, hydraulic fracturing is widely used as an effective means to improve the percolation conditions of formation.Wuqi Oilfield has been developed for many years. As a low permeability reservoir, water injection development has become a necessary measure to maintain formation energy and maintain long-term stable production in Wuqi Oilfield.However, because the reservoir will be polluted in varying degrees during the development process, when implementing water injection development, there is often an increase in water injection pressure, or even a failure to inject water into the reservoir.By using the traditional gel-fracturing hydraulic fracturing fracturing fracturing hydraulic fracturing fracturing fracturing hydraulic fracturing fracturing hydraulic fracturing fracturing hydraulic fracturing fracturing hydraulic fracturing hydraulic fracturing fracturing hydraulic fracturing hydraulic fracturing hydraulic fracturing hydraulic fracturing measures to contact the formation pollution near the well to increase the injection rate and reduce the water injection pressureThe retention of macromolecular residual fluid can easily cause formation blockage, damage reservoir, and greatly reduce the effect of injection increase in water injection wells.There are differences in fracture extension and fracture morphology.Based on the research of the fracture mechanism of active water fracturing and on the basis of clean water fracturing, this paper improves and guides the optimization design of active water fracturing, combines with the actual situation of injection increasing measures in Wuqi Oilfield, adopts theoretical guidance and software parameter simulation.The successful application of active water fracturing technology in Wuqi oilfield is given, which improves the effect of injection increase in low permeability reservoir and provides reliable technical support for water injection development in low permeability oil field.
【學位授予單位】：西安石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE357.1

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本文編號：1741370