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  • 產品展廳>>項目研發>>遼河油田提撈試井資料解釋及工作制度研究

    對于開發井,由于生產時間很長,已無法得到原始的狀態,因此測試時第一段應該是壓力恢復,通過第一段的壓力恢復可以大致反推第一段關井前的壓降漏斗,依據這一壓降漏斗計算壓力歷史。在提撈井壓力史計算中,由于提撈時間與恢復時間相比很小,在井筒壓力計算中忽略提撈時間,而認為壓力瞬間改變,即壓力在提撈期間是階梯變化,而停產期間壓力變化按DST流動處理,可以自動計算回收量。對于間抽采油由于存在地層流入到井筒的量與從井筒抽出的量不相等,所以需要輸入流動達到穩定時的流量,同時也要確定穩定流動時間。

    我公司根據間抽及提撈采油的特點,建立了間歇采油和提撈井的數學模型,提出了全壓力歷史擬合的試井分析方法。

    本項目研發提撈試井分析和生產優化預測軟件,主要技術內容包括:

    建立提撈試井物理模型及數學模型。

    完成提撈試井數學方程求解方法及試井圖版繪制。

    建立提撈試井資料解釋方法及生產制度優化方法。

    進行現場井的資料解釋及制度優化,提供地層原始壓力及平均壓力,利用試井解釋結果進行生產制度優化,并預測壓力及產量。

    本項目形成軟件后可根據現場數據進行分析,并通過生產優化預測未來產量。通過在遼河油田的現場應用,不僅得到了解釋結果,而且根據解釋結果優化了間抽及提撈采油的工作制度,具有很強的技術優勢。

    Products>>Project Development>>Study on the influence of volume fracturing boundary and seepage characteristics of dense reservoir

    At present, the exploration targets and key research objects of the oilfield are mainly dense reservoirs. For such reservoirs, it is often necessary to carry out reservoir reconstruction, well pattern infilling and other measures through multi-stage hydraulic fracturing in long horizontal wells to improve oil and gas production and realize efficient and economic development. However, multi-stage fracturing of horizontal wells is a world-class problem and a technical bottleneck restricting the application of horizontal wells in low-permeability reservoirs. The key technologies are: studying horizontal well reservoir engineering to solve the problem of horizontal well layout; Study the in-situ stress field to solve the problems of hydraulic fracture initiation and shape; Study the optimal design of staged fracturing in horizontal section to solve the problem of multi-stage fracture setting; Study the staged fracturing technology and tools to solve the implementation problem of staged fracturing in horizontal wells; Crack monitoring is studied to solve the problem of multi-stage crack evaluation.

    Establishment and solution of mathematical model for large-scale volume fracturing

    Influence of seepage law in volume fracturing zone and undisturbed formation of horizontal well on well test model

    Study on dense non-Darcy seepage: The influence of start-up pressure gradient on flow is analyzed

    Study on the method of determining formation parameters by data inversion and analysis of influencing factors

    The mathematical model of injection and production seepage resistance and the formula of pressure-distance under different liquid volume are studied, and the characteristic curve is analyzed

    Productivity analysis and prediction calculation model and productivity curve using unstable well test data

    The project has made a breakthrough in the research of tight multi-stage fracturing horizontal well test technology, and proposed a tight well test analysis method, which provides a technical guarantee for well test evaluation in the process of shale oil volume fracturing development. The effective combination of model establishment, model solution and production application is realized. The interpretation provides parameters such as formation permeability, well storage constant, skin coefficient, fracture half-length and start-up pressure. The field application effect is good.

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